CN103964654B

CN103964654B - Energy-saving and emission-reducing town sewage treatment system

Info

Publication number: CN103964654B
Application number: CN201410230363.4A
Authority: CN
Inventors: 陈秋竹; 王明芳; 陈思宇; 陈颖
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-11-15
Filing date: 2014-05-28
Publication date: 2016-02-03
Anticipated expiration: 2034-05-28
Also published as: CN203845918U; CN103964654A

Abstract

The invention belongs to environmental technology field, be specifically related to energy-saving and emission-reducing town sewage treatment system.The invention provides a kind of energy-saving and emission-reducing town sewage treatment system, comprise strenuous primary treatment system, Self-priming jet aeration bacteria filter system, compound fluidized bed bio film reaction cell system, sludge treatment return-flow system and Winter protection system, realized by sewage lifting formula technique or sewage self-flowing formula technique.Anerobic sowage process new technology, activated sludge process and biomembrance process aerobic treatment new technology organically combine by native system, reach occupation of land less, invest little, that energy consumption is low, maintenance management is easy advantage.Sewage treatment systems of the present invention can be used for urban wastewater treatment, and the water outlet Absorbable organic halogens after process reaches " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) primary standard A standard.

Description

Energy-saving and emission-reducing town sewage treatment system

Technical field

The invention belongs to environmental technology field, be specifically related to energy-saving and emission-reducing town sewage treatment system.

Background technology

The notice (No. (2011) 42, promulgated by the State Council) that national environmental protection " 12 " is planned; the Party Central Committee, State Council pay much attention to environmental protection work; it can be used as the important content of implement scientific view of development; as the important means of Economic Development Mode Conversion, as the essential measure advancing Ecological Civilization Construction.

Current, the overall deteriorating trend of China's environmental aspect is contained not yet at all, and environment contradiction highlights, and pressure continues to strengthen.Seriously, subregion and urban atmosphere gray haze phenomenon are given prominence to, and many regional discharge of major pollutant amounts exceed environmental capacity for some major river valleys, marine site water pollutions.Rural environmental pollution aggravates, and heavy metal, chemical, persistence organic pollutant and soil, underground water etc. pollute and manifests.Some areas ecological damage is serious, and ecosystem function is degenerated, and ecotope is more fragile.Nuclear and radiation safety risk increases.The demand of people's environment improves constantly, and the quantity of unexpected environmental accident remains high, and environmental problem has become one of important factor threatening HUMAN HEALTH, public safety and social stability.The pressure of the global environmental problems such as bio-diversity conservation continues to increase.Environment protection legal system is not perfect, and drop into still not enough, law enforcement weak, ability to supervise relatively lags behind.Meanwhile, along with All population capacities sustainable growth, industrialization, urbanization advance fast, and total energy consumption constantly rises, and continuation increases by pollutent generation, and the environmental constraints of economic growth is strengthened increasingly.

Explicitly call in planning: promote urban wastewater treatment level.Strengthen sewage network and build dynamics, advance rain, dirty shunting transformation, accelerate county town and emphasis organic town construction of wastewater treatment plant, by 2015, the newly-increased town sewage pipe network about 160,000 kilometers in the whole nation, newly-increased sewage daily handling ability forty-two million ton, realizes all counties substantially and emphasis organic town possesses sewage treatment capacity, sewage treatment facility rate of load condensate brings up to more than 80%, and treatment rate of domestic sewage reaches 85%.Advance sewage sludge harmlessness process disposal and reuse of wastewater.Strengthen sewage treatment facility to run and pollutant fluxes evaluation, advance the construction of municipal sewage plant's monitor supervision platform.The major river valleys such as Dian Chi, Chaohu, Taihu Lake and coastland urban wastewater treatment firm will improve denitrogenation dephosphorizing level.

Planning requirement improves quality of water environment: in-depth major river valley water prevention and cure of pollution.Specify the priority acccess control unit of each major river valley, carry out zonal control.Basin of Huaihe River will be given prominence to and be done a good job of it ammonia control, and emphasis advances the water pollution control in urban areas such as master stream, Huaihe River and Zhengzhou, Kaifeng, the Huaibei, Huainan, Bangbu, Bozhou, Heze, Jining, Zaozhuang, Linyi, Xuzhou, and master stream water quality reaches III class substantially.Haihe basin will be strengthened water resources utilization and plan as a whole with water prevention and cure of pollution, and attach most importance to drinking water safety guarantee, Urban Water Environment improvement and Cross-border Water Pollution govern coordinately, significantly decreasing pollution load, realizes bad V class water quality section proportion and obviously decline.Liaohe River Basin will strengthen urban water system Water Environmental Synthesis Dredge, advances Liaohe River Ecological rehabilitation, realizes Liaohe river mainstream and recruits the tributary water quality such as Su Taihe, strip river, Grand Liao River to be clearly better.Three Gorges Reservoir area and the Yangtze River above it want strengthening contamination disposal, Ecology to protect and water conservation, guarantee that upstream and reservoir area water quality keep excellent.Songhua River Basin will strengthen urban water system Water Environmental Synthesis Dredge and controlling area-source pollution, bad V class of state's control section water quality basically eliminate.Upper-middle Reaches of The Yellow River wants emphasis to advance the tributary water prevention and cure of pollution such as the Weihe River, Fenhe River, tree rings, strengthen the environmental risk prevention and control of peaceful east, Erdos and northern Shensi equal energy source chemical base, strengthen Hetao Irrigation District widespread pollution from the overuse of fertilizers and pesticides in rural area control, realize tributary water quality significantly to improve, master stream is stable reaches using function requirement.Taihu Lake basin will put forth effort to reduce into pollution loads such as lake total nitrogen, total phosphorus, and lake body water quality brings up to V class by bad V class, and eutrophication trend is curbed.Chaohu Basin will be strengthened cultivation and enter lake Environmental capacity, cuts down ammonia nitrogen, total nitrogen and total phosphorus pollution load, strengthens ecosystem of lake regions reparation, and containment lake body eutrophication trend, mainly enters the bad V class water quality of tributary, lake basically eliminate.Dianchi Lake Basin comprehensively will advance the water prevention and cure of pollution in lake body, ecological protection region, guiding utilization region and water conservation region, improves ingoing river and lake body water quality.Water prevention and cure of pollution and bringing soil erosion under control will be strengthened in Middle Line Project For Transferring Water From South To North Reservoir Area of Danjiangkou and upstream, advance Control of Agricultural Non-point Source Pollution, realize water quality overall up to standard; Water source and will deepen Pollution abatement further along the line, guarantees water transfer water quality.

Do a good job of it the control of other Water Basin Water Pollutions.Strengthen the middle and lower reach of Yangtze River, Pearl River Delta prevention and cure of pollution dynamics, realize water conditioning and take a turn for the better to some extent.By south-west rivers, all rivers of Northwest inland, southeast Zhu He, Poyang Lake, Dongting Lake, Hongchehu Lake, Fuxian Lake, Liangzi Lake, Bosten, Ebinur Lake, Weishan Lake, Qinghai Lake and Erhai etc. are as the major area ensureing and promote hydro-ecological safety, water ecological environment quality evaluation system is set up in exploration, carry out hydro-ecological safety comprehensive assessment, implement water prevention and cure of pollution and hydro-ecological safety safeguards.Strengthen governor lake, Hubei, three lakes, White Dew lake, the comprehensive regulation such as Honghu and Yi Long lake, Yunnan Province.Strengthen the environment supervision to rivers such as Heilungkiang, the Wusuli River, TUMENJIANG RIVER, Eerqisihe River, the Yilihe River and prevention and cure of pollution dynamics.Strengthen protection that is good to water quality or ecology fragility lake.

Planning explicitly points out: promote environment technological basis investigation and application ability.The scientific basic of compacting environmental criteria, standard stipulation, improves the environmental management technical systems such as environmental surveys assessment, monitoring and warning, risk prevention.Advance the construction such as national environmental protection key lab, Industry Technology Center, field inspection research station.Organize and implement the national science and technology key special subjects such as water pollution Control and treatment, research and develop new and high technology, gordian technique, the common technology of Environmental capacity, ecological protection and environmental risk prevention energetically.The technology such as soil remediation, Control of Agricultural Non-point Source Pollution of the control techniquess such as research and development oxynitride, heavy metal, persistence organic pollutant, hazardous chemical and applicable China's national situation.Promote desulfurization and denitrification integral, dephosphorization denitrogenation integrated and remove the research and development of the Comprehensive Control Technology such as heavy metal energetically, the demonstration of strengthening modern technique with promote.

The General Office of the State Council is about the notice (Office of the State Council is sent out (2012) No. 24) printing and distributing " 12 " national urban wastewater treatment and the planning of regeneration Facilities Construction: " planning " is to promote China's town domestic sewage process and regeneration capability and qualification for overall goal, specify that the construction task of " 12 " period, proposing the concrete measure that guarantee " planning " is implemented, is instruct quickening cities and towns, various places sewage treatment facility to build and arrange the important evidence of governmental investment." planning " scope comprises the planned city of national all regions, county town and organic town (except area, Hong Kong, Macao and Taiwan).

At present, whole nation most area has carried out organic town's sanitary sewage disposal, the sewage disposal of some organic towns adopts artificial wetland process, run problems faced after 2 ~ 3 years more and more to present, although this technique working cost is lower, the floor space of whole system is larger, pipeline of leaving the bed easily block, running maintenance is more difficult, and clay seam, once seepage will affect local underground water, finally becomes one piece of sewage field that rural area is fallen into disuse.And the adaptive faculty that this technique meets change to water inlet is strong, so facility is not long for working life, the life-span is only 5 ~ 10 years, the line clogging in bed groove or break down, whole system will be collapsed.Separately, to process the sewage work (Chinese organic town is average) of 1500 tons day, by wastewater treatment engineering legislation (HJ2005-2010) requirement of national environmental protection portion: surface stream, horizontal drowned flow, it is 0.3 that vertical subsurface flow is averaged hydraulic load (m3/m2.d), then treating pond covers an area of 5000 square metres, off-set facility (pretreatment pool, sludge treatment, service platform, side slope, watchroom etc.) take up an area about 700 square metres, add up to about 6000 square metres (rolling over 9 mu), about there is township level 41636 in China at present, this technique (Sichuan is adopted by 30%, Chongqing is 80% before in June, 2013), then need 112417.2 mu, soil, because this technique must be built at the low-lying place of organic town's periphery, and low-lying place major part is all good farmland mellow soil, belong to valuable to plough, a kind of waste to land resources.

At present, local environmental protection competent authorities, in order to reach pollution reduction object, require to add biological contact oxidation process technique in artificial wetland process front end, and the technique that working cost is lower originally becomes history.

The sewage disposal of some organic towns adopts artificial rapid infiltration system technique, technical disadvantages is also comparatively outstanding, mainly take up an area larger, simultaneously to may oil-containing or there is the water that suspended substance impacts and there is greater risk and use this technology to there is risk, should consider to adopt pre-treatment to strengthen the defense treatment process, as methods such as flocculation sediment, acidication, oil removal air supporting, preaeration, once suffer that impacting short-term is difficult to recover, or even accident.

Manpower rapid-infiltration lacks desirable total nitrogen denitrification mechanism, lower to total nitrogen removal efficiency, be no more than the removal total nitrogen ability of 30% under normal circumstances, and acidic effluent on the weak side is easily produced for water outlet after the higher sewage long-play of ammonia nitrogen, need to supplement expensive particular fillers in time and supply basicity.Only be in inorganic phosphorus absorption aspect for total phosphorus process, adsorption efficiency is limited, so should not adopt manpower rapid-infiltration technology for high phosphorus sewage disposal simultaneously.

Be similar to a kind of trickling filter in microbial film due to artificial rapid infiltration system technique, be similar to again conventional filtration, biomembranous growing into finally comes off, and can cause the even large-area blocking of situation, and the stage of paralysis appears in final Sewage treatment systems.

Other, as anoxic-aerobic process abbreviation A-O technique, are made up of anoxic pond, Aerobic Pond and second pond.This technique is the Typical Representative of traditional activated sludge process, while organics removal, has good denitrification functions.The effect of Aerobic Pond mainly carries out organic oxidation, and carries out ammonification, nitrification.And denitrification is mainly carried out in the effect of anoxic pond, thus complete biological denitrificaion.First waste water enter anoxic pond, and in anoxic pond, the denitrifying bacteria in returned sluge utilizes organism in waste water as carbon source, the nitrate-nitrogen reduction in returned sluge become nitrogen to overflow waste water.Waste water carries out organic oxidation in Aerobic Pond, removes COD, carries out the ammonification of organonitrogen and the nitrated of ammonia nitrogen simultaneously.Establish settling tank after aerobic section, partly precipitated sludge reflux to anoxic section, to provide sufficient denitrifying bacteria.Simultaneously also by the mixed-liquor return in aerobic section to anoxic pond, to ensure that anoxic pond has enough nitric nitrogens.

This technique essence is traditional activated sludge process, just increases anoxic pond to reach the object of denitrogenation.Institute is the same with traditional activated sludge process relative merits in this way, and advantage is technology maturation, simple to operate; Shortcoming is that construction investment is comparatively large, easily sludge bulking occurs, denitrogenation mainly by backflow, kinetic energy consumption comparatively greatly, the problems such as the floor space of Aerobic Pond is large.

In addition, although biological contact oxidation process has the advantage of activated sludge process and biomembrance process concurrently, at present there is latch up phenomenon in the microbial film of Problems existing mainly in pond between filler sometimes, and working cost is high.

Secondly, sewage disposal technology general both at home and abroad mainly adopts biological process, this method have process thoroughly, the advantage such as degradation effect of organic compound is high, secondary pollution is little, energy consumption is low and operational management is convenient.But also there is the adaptation of microorganism to environment and have requirement, particularly water temperature is comparatively difficult to resolve certainly by the problem of natural environment influence.Theoretical and experimental investigations a large amount of both at home and abroad shows, what normal water treatment condition utilized is mesophilic bacteria, and between 15 ~ 35 DEG C, have good activity, when water temperature is lower than 8 DEG C or higher than 35 DEG C, the speed of microbial reaction obviously reduces.In actual motion, water temperature is less higher than the situation of 35 DEG C, reduces water temperature also than being easier to.When water temperature is lower than 8 DEG C, mesophilic bacteria activity reduces or dead, but district keeps water temperature to be not less than 8 DEG C is higher then very difficult thing at the north or height above sea level, and power consumption and insulation all have problems.So, how to ensure the north or height above sea level sewage work of district normally run winter to be higher one of the major issue being badly in need of solving.

The north or height above sea level district's regional water quality water yield feature higher: sewage characterizes with its physics, chemistry and biological component.The precondition of Designing Sewage Treatment Plant correctly to grasp the water quality of sewage, because the moiety of sewage is extremely complicated, is difficult to represent its character by single index.Therefore, in numerous water-quality guideline, be divided into suspended state material and the large class of solubilised state material two by impurity profiles size in sewage, every class can be divided into again Organic material and inorganic nature material by its chemical property; By whether consuming dissolved oxygen in water body, biochemical oxygen demand (BOD) and chemical oxygen demand (COD) (COD) etc. can be divided into again.When Sewage treatment systems designs, sewage quality is the prerequisite determined treatment facility ability and performance characteristic and guarantee to reach processing target, the important foundation data of the planning of Ye Shi sewage work, design and running management.In municipal effluent, the content of pollutent is relevant to water consumption, water exhaust system, weather and living habit etc.,

The north or height above sea level higher area, district are cold for winter, and sewage temperature is low, and simultaneously due to the difference of living habit, town sewage has following characteristics.

(1) water temperature is low.Temperature is along with being season mechanical periodicity, and water temperature is then with temperature Change, but its luffing is relatively little, and particularly in sewer line, water temperature luffing is little.The town sewage temperature in the north or height above sea level low temp area area is higher generally at 8 ~ 15 DEG C, and minority is at 6 ~ 8 DEG C.

(2) water quality is poor.Because the Spring Festival in winter is near, resident is main mainly with animal food, and ground water table is comparatively dark, and in sewage, water leaking-in is few, and urbanite water consumption amount is little, and bath water is few, therefore water quality is poor, and oil-containing is many, and Pollutant levels content is high.

(3) water yield change greatly.Such regional winter, days are short and nights long, so the sewage discharge on daytime is comparatively concentrated, and night, sewage quantity was less, so the water yield changes greatly round the clock, easily forms water quality and quantity to Sewage Plant and impact.

Build up sewage treatment facility through more than 1200, different areas, the field trip whole nation and visited owner, result shows, mainly there is following problem in current organic town's sewage disposal technology: floor space is large, investment is large, operation and maintenance expense is high, it is on duty to need to dispatch officers for a long time, effluent quality can not stably reaching standard discharge or substantially do not run, in the winter time, treatment effect is poor especially.

As can be seen here, research and develop a kind of invest little, floor space is little, operation and maintenance expense is low, without the need to personnel's on duty, stable effluent quality qualified discharge and to be applicable to organic town's domestic sewage treatment process technology in district in all parts of the country imperative for a long time.

Summary of the invention

The technical problem to be solved in the present invention is to provide a kind of town sewage treatment system of high-effect less energy-consumption.

Technical scheme of the present invention is energy-saving and emission-reducing town sewage treatment system, comprises strenuous primary treatment system, Self-priming jet aeration bacteria filter system, compound fluidized bed bio film reaction cell system, sludge treatment return-flow system and Winter protection system:

Described strenuous primary treatment system comprises the grating tank, adsorption tank, anoxic pond, the mixing liquid pool that are connected by pipeline successively; The even lift pump of at least a set of automatic stirring is installed in described adsorption tank and carries out sewage lifting, or slightly higher than anoxic pond bottom adsorption tank, and bottom it, water outlet installs at least a set of flow control valve, forms sewage self-flowing; In mixing liquid pool, at least a set of circularly enhancing pump is set, and supporting mixed-liquor return outlet, mixed-liquor return outlet is connected by pipeline with adsorption tank;

Described Self-priming jet aeration bacteria filter system comprise connected by pipeline successively BAF, Self-priming jet aeration device, aeration tank; BAF is connected by promoting to be responsible for the circularly enhancing pump in mixing liquid pool, and connects Self-priming jet aeration device by jet supervisor; Described BAF is positioned at the upper end of Self-priming jet aeration bacteria filter system, and Self-priming jet aeration device is at middle part, and aeration tank is in lower end; Mixing liquid pool is communicated with anoxic pond, aeration tank by pipeline or hole;

Described compound fluidized bed bio film reaction cell system comprise connected by pipeline blower fan, first step fluidized bed bio film reaction pond, fluidized bed bio film reaction pond, the second stage, sterilization pool, open-channel meter pond, monitor well;

Described described sludge treatment return-flow system are made up of spoil disposal supervisor, mud discharging valve, excess sludge discharge valve, returned sluge vent valves, sludge drying pond and sludge drying filtrate; Described sludge drying pond is at least one;

Described Winter protection system by being incubated main body, heat energy feeder, air interchanger form;

Be provided with mud discharging valve bottom described anoxic pond, aeration tank, first step fluidized bed bio film reaction pond, fluidized bed bio film reaction pond, the second stage to be responsible for blowdown and to be connected.

Concrete, there are nozzle, reverberator, the facultative mud of suspension, water outlet weir plate, tank in described anoxic pond.

Concrete, described BAF is made up of pond body, cloth tank, water distributor, splash board, biologic packing material, breather hole, upflow tube, water leg, jet supervisor and Self-priming jet aeration device.

Concrete, described aeration tank is made up of pond body, aeration zone, settling region, mud-water separation district, dephosphorization filtrating area, water leg and constant control valve, aeration tank is built with active sludge, the both sides of aeration tank or one-sidedly arrange mud-water separation district and dephosphorization filter packing district, bottom, aeration tank is settling region.

Preferably, the dephosphorization filter packing in described dephosphorization filter packing district is the calcareous filter material of iron.

Concrete, described first step fluidized bed bio film reaction pond is made up of first step fluidized bed bio film reaction district, first step settling region, first step filtrating area; Described first step fluidized bed bio film reaction district is first step filler fluidization regions, be first step settling region bottom first step filler fluidization regions, first step settling region communicates with bottom first step filtrating area, top, first step filtrating area is connected with tank, and tank is communicated with top, fluidized bed bio film reaction pond, the second stage; Between first step fluidized bed bio film reaction district and first step settling region, micropore aeration pipe is installed;

Described fluidized bed bio film reaction pond, the second stage is made up of fluidized bed bio Mo Fan district, the second stage, settling region, the second stage, filtrating area, the second stage; Described fluidized bed bio film reaction district, the second stage is filler fluidization regions, the second stage, be settling region, the second stage bottom filler fluidization regions, the second stage, settling region, the second stage communicates with bottom filtrating area, the second stage, and top, filtrating area, the second stage is connected with biological oxidation pipe, tank, and tank is communicated with water shoot; Between fluidized bed bio film reaction district, the second stage and settling region, the second stage, micropore aeration pipe is installed;

Be provided with in described first step filtrating area in flexible filter filler, filtrating area, the second stage and aluminium matter filter material, fibre bundle filtration filler and gas back-flushing system are installed.

Further, described spoil disposal supervisor arranges gas boosting conducting sludge drainage system.

Preferably, described sludge treatment return-flow system are also provided with from stirring evenly lift pump.

Preferably, described insulation main body is the house of brick mix structure, the factory building of steel construction or standard day-light greenhouse; Heat energy feeder is increase warmer in Ventilator Room.

Preferably, adsorption tank and dissolved oxygen in anoxic tank concentration are at 0.2mg/L ~ 0.5mg/L.

Concrete, in the first step, fluidized bed bio film reaction pond, the second stage, the residence time is 2 ~ 3 hours to sewage respectively.

Preferably, in the first step, fluidized bed bio film reaction pond, the second stage, the residence time is 2.5 hours to sewage respectively.

Concrete, in the first step, settling region, the second stage, the residence time is 1 ~ 2 hour to sewage respectively.

Preferably, in the first step, settling region, the second stage, the residence time is 1.5 hours to sewage respectively.

Concrete, the blower fan working hour is 6 ~ 12 hours.

Preferably, inflow temperature blower fan working hour below 12 degrees Celsius is 10 hours, and inflow temperature blower fan working hour more than 12 degrees Celsius is 8 hours.

Concrete, described Sewage treatment systems builds modularization, meets different times sewage load, reaches energy-saving and cost-reducing object.

Strenuous primary treatment system of the present invention is formed by grating tank, adsorption tank, anoxic pond, mixing liquid pool and is connected successively by pipeline.Grating tank is made up of with artificial grid or mechanical grille water inlet pipe, grille well.

In the adsorption tank of hoisting type Sewage treatment systems, one or more sets are installed and automatically stir evenly lift pump, automatically stir evenly while lift pump realizes sewage or mixed solution lifting and again hydraulic mixing is carried out to adsorption tank, prevent sludge accumulation.Slightly higher than anoxic pond bottom the adsorption tank of gravity flow Sewage treatment systems, the sewage in adsorption tank can flow automatically in anoxic pond; Bottom adsorption tank, water outlet is provided with one or more sets flow control valves, the Valve controlling discharge of sewage, ensures the equilibrium of subsequent technique hydraulic load and steady running.Adsorption tank has sewage regulatory function, except the sewage of normal admission front end, also needs to accept the returned sluge in subsequent treatment process or mixed solution.Returned sluge or mixed solution enter in adsorption tank by pipeline self, returned sluge or mixed solution mix with water inlet sewage, pollutent (protein or colloid) in sewage is by sludge absorption, complete biological adsorption function, the combined sewage containing mud enters the process of follow-up anoxic pond process section by automatically stirring evenly lift pump lifting.

Nozzle, reverberator, the facultative mud of suspension, water outlet weir plate, tank are installed in anoxic pond, containing a large amount of active sludge there is the microorganism of high density in anoxic pond, complete biological denitrificaion and contaminant degradation simultaneously.

A set of or a set of above low pressure recycle is installed in mixing liquid pool and automatically stirs evenly lift pump and a supporting mixed-liquor return water outlet.Mixed solution lift pump is intermittent operation, to meet in aeration tank microorganism to the demand of dissolved oxygen, reaches sewage and to circulate performance period in above-mentioned treating pond anoxic, anaerobism, aerobic.Mixing liquid pool is communicated with anoxic pond, aeration tank by pipeline or hole; Arrange mixed-liquor return water outlet in mixing liquid pool, mixed-liquor return water outlet is connected by pipeline with adsorption tank.Mixed solution in pond is due to subsequent technique water rate control, unnecessary mixed solution is drained in adsorption tank by pipeline, guarantee that again adsorption tank and dissolved oxygen in anoxic tank concentration are at 0.2mg/L ~ 0.5mg/L, reciprocation cycle accumulate a large amount of mud in guarantee adsorption tank and anoxic pond while.

The water-in of BAF of the present invention connects mixed solution and promotes supervisor, and connects Self-priming jet aeration device by jet supervisor.BAF is made up of pond body, cloth tank, water distributor, splash board, biologic packing material, breather hole, upflow tube, water leg, jet supervisor and Self-priming jet aeration device.BAF pond shape is square, circular or other shapes.BAF pond body structure is steel construction, glass reinforced plastic or Steel Concrete.The calcareous filter material of the preferred iron of dephosphorization filter packing.

Aeration tank of the present invention water outlet installs a set of flow control valve, guarantees that subsequent technique section hydraulic load is stablized.Self-priming jet aeration bacteria filter system is made up of activated sludge process and biomembrance process, aeration tank is activated sludge process, high-load aerating biological filter is biomembrance process, automatically stir evenly the effect of lift pump in low pressure recycle under, back and forth complete the alternate run of activated sludge process and biomembrance process, automatically stir evenly again the effect of lift pump intermittent operation in low pressure recycle under, guarantee that sewage back and forth completes anaerobism in aeration tank and high-load aerating biological filter, anoxic, aerobic, COD is completed again while furthermore achieved that sewage denitrification and dephosphorization process, the removal of the pollutents such as BOD.

Compound fluidized bed bio film reaction cell system of the present invention is formed by blower fan, first step fluidized bed bio film reaction pond, fluidized bed bio film reaction pond, the second stage, sterilization pool, open-channel meter pond, monitor well and is connected by pipeline.

Fan unit is made up of blower fan, valve, blast main, air arm, micropore aeration pipe, is realized by known technology.The air that blower fan provides is for the first step, fluidized bed bio film reaction pond, second stage aeration.

Described first step fluidized bed bio film reaction pond is made up of first step fluidized bed bio film reaction district, first step settling region, first step filtrating area; Described first step fluidized bed bio film reaction district is first step filler fluidization regions, be first step settling region bottom first step filler fluidization regions, first step settling region communicates with bottom first step filtrating area, top, first step filtrating area is connected with tank, and tank is communicated with top, fluidized bed bio film reaction pond, the second stage; Between first step fluidized bed bio film reaction district and first step settling region, micropore aeration pipe is installed.

Described fluidized bed bio film reaction pond, the second stage is made up of fluidized bed bio Mo Fan district, the second stage, settling region, the second stage, filtrating area, the second stage; Described fluidized bed bio film reaction district, the second stage is filler fluidization regions, the second stage, be settling region, the second stage bottom filler fluidization regions, the second stage, settling region, the second stage communicates with bottom filtrating area, the second stage, and top, filtrating area, the second stage is connected with biological oxidation pipe, tank, and tank is communicated with water shoot; Between fluidized bed bio film reaction district, the second stage and settling region, the second stage, micropore aeration pipe is installed.

Spherical suspending biologic packing material or the MBBR filler special of some amount is loaded in the first step, fluidized bed bio film reaction district, the second stage.Be provided with the plastic grid of micropore aeration pipe and high strength between filler fluidization regions, fluidized bed bio film reaction pond and settling region, the plastic grid of high strength prevents MBBR filler special from entering settling region.Be provided with in first step filtrating area in flexible filter filler, filtrating area, the second stage and aluminium matter filter material, fibre bundle filtration filler and gas back-flushing system are installed.

Blower fan is intermittent operation, to meet in first step fluidized bed bio film reaction district, fluidized bed bio film reaction district, the second stage microorganism to the demand of dissolved oxygen, reaches sewage and to circulate performance period in above-mentioned treatment zone anoxic, anaerobism, aerobic.

The technique that described compound fluidized bed bio film reaction pond is combined by modified form fluidized bed bio film reaction district, settling region, biological filter district and clear water zone, this technique also has the feature of cyclic activated sludge system, biological aerated filter process except having the feature of fluidized bed bio film, there is again the function of mud automatic back flow, sludge settling, sewage purification filtration and clean water basin simultaneously, save secondary sedimentation basins and clean water basin.

Fibre bundle filtration filler and gas back-flushing system are installed in filtrating area, the second stage, the SS in sewage removed effectively by fibre bundle filtration filler, regular startup gas back-flushing system, by the SS back flushing of fibre bundle filtration filling adsorption and by counter-flushing liquid to equalizing tank or sludge drying pond.

Be provided with sterilization equipment in sterilization pool, sterilization equipment can be UV sterilizer or ozonizer, also can be chlorine dioxide generator or other sterilization equipments.The dosing method of sterilizing agent can adopt conventional any one.According to relevant laws and regulations, chlorine residue needs to remove.Antisepsis contact tank meets sewage and contacts with the effective of sterilizing agent.

Open channel flow rate is provided with under meter in pond, can with open channel supersonic flowmeter or other under meters.Monitor well is standardization sewage draining exit, can install online monitoring facilities equipment.

The sludge treatment of hoisting type Sewage treatment systems of the present invention return-flow system are made up of spoil disposal supervisor, mud discharging valve, excess sludge discharge valve, returned sluge vent valves, sludge drying pond and sludge drying filtrate.Described sludge treatment the mud of return-flow system adopt step-down spoil disposal, and the mud that all process sections produce is entered in sludge drying pond or adsorption tank by spoil disposal supervisor.Described spoil disposal supervisor is connected to the bottom of each system treating pond.Described mud discharging valve is connected on the spoil disposal supervisor in each art breading pond.Excess sludge enters drying and other treatment in sludge drying pond, the further harmless treatment of the mud after drying and other treatment.Sludge drying pond is one or more groups, and all sludge drying concentrated solution gravity flows enter adsorption tank, circular treatment.Spoil disposal supervisor arranges gas boosting conducting sludge drainage system.

Gravity flow Sewage treatment systems of the present invention by spoil disposal supervisor, mud discharging valve, excess sludge discharge valve, returned sluge vent valves, sludge drying pond, sludge drying filtrate and certainly stir evenly lift pump and form.Sludge treatment the mud of return-flow system adopt step-down spoil disposal, and the mud that all process sections produce is entered in sludge drying pond by spoil disposal supervisor.Spoil disposal supervisor is connected to the bottom of each system treating pond.Mud discharging valve is connected on the spoil disposal supervisor in each art breading pond.Excess sludge enters drying and other treatment in sludge drying pond, the further harmless treatment of the mud after drying and other treatment.Sludge drying pond is one or more groups, and all sludge drying concentrated solutions enter adsorption tank, circular treatment by certainly stirring evenly lift pump.Returned sluge regularly enters sludge drying concentrated solution collecting region, enters adsorption tank by certainly stirring evenly lift pump, ensures the sludge concentration of adsorption tank and anoxic pond.Sludge drying filtrate can be gravel particle grating, or other filter materials.Be submersible type no-blocking pollution discharging pump from stirring evenly lift pump, band agitating function, discharges muddy water mixing.

Winter protection system of the present invention by being incubated main body, heat energy feeder, gas barrier form, and is applicable to the north or height above sea level district higher.Insulation main body can be the house of brick structure, the factory building of steel construction, standard day-light greenhouse or other insulation constructions.Heat energy feeder can be air-conditioning, heating installation, and can be increases warmer in Ventilator Room, or other increase the facility of sewage temperature.Gas barrier comprises vent fan, emission-control equipment, vapor pipe.

The design's process structures are compact, and area is little, increase warmer, can guarantee that the room temp at noon at subzero 20 degrees Celsius can reach more than 20 degrees Celsius in preferred standard day-light greenhouse and Ventilator Room.Night mends temperature on a small quantity when subzero 30 degrees Celsius on the basis that secondary is incubated, and room temp is no less than 8 degrees Celsius.

China's most area winter temperature is all at 2 ~ 8 degrees centigrade, this area can directly adopt concurrent heating in Ventilator Room, enter in treatment tank by blower fan heat air delivery, can guarantee that sewage temperature is more than 12 degrees Celsius, ensure that the normal operation of sewage disposal.

Sewage treatment systems of the present invention adopts circulating biological to adsorb from (streaming or hoisting type), multi-stage anaerobic-anaerobic-aerobic-precipitation-filtration process flow process, sewage is first through strenuous primary treatment system biological absorption-anaerobic treatment, degraded majority of organic pollutants can be removed and improve the biodegradability of sewage, again through Self-priming jet aeration bacteria filter system aerobic-anoxic-anaerobism-precipitation-dephosphorization filtration treatment, remove a large amount of organic pollutants, ammonia nitrogen and phosphoric acid salt, again by compound fluidized bed bio film reaction cell system aerobic-anoxic-anaerobism-precipitation-filtration treatment, and remove remaining some organic pollutants in degradation of sewage, thus improve the pollutants removal rate of whole sanitary sewage.

Beneficial effect of the present invention:

Present system by pollutent step-type multi-step process degradation, can solve the defect of single technique, effectively utilizes potential energy, completes optimised process configuration, alleviates subsequent technique burden, ensured the security for the treatment of process, continuity, Stability and dependability.The electromechanical equipment configuration of present system is less, power is low, Controlling System is simple, level of automation is high, and electromechanical equipment intermittent operation, ton water current consumption is low.Forever maintain the microorganism of high density in reactor, guarantee the oxygenolysis of organic pollution materials.Adopt low-pressure pump as primary device, application Self-priming jet aeration device, ensure that the supply of dirty oxygen in water.This Sewage treatment systems has stronger adaptability to the water yield, water quality, water temperature variation, and resistance to go out load high; Processing efficiency is high, sludge output is few, without sludge bulking, good effect of separating solid from liquid, device volume is little, Nitrogen/Phosphorus Removal is remarkable.Take up an area little, low, the low maintenance of less investment, working cost.Present system can templating, be applicable to large-scale wastewater treatment plant and all parts of the country, not only for the process of newly-built organic town sanitary sewage, the process of the transformation of sewage work of built organic town, Small Urban sanitary sewage can also be applied to, also the city domestic sewage process of the application north and extremely frigid zones.Sewage is after Sewage treatment systems process of the present invention, and water outlet Absorbable organic halogens reaches " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) primary standard A standard.

Accompanying drawing explanation

Fig. 1 is organigram that is energy-conservation and reduction of discharging type organic town sewage treatment process hoisting type.

In figure: inlet channel 1, grating tank 2, grid 3, adsorption tank 4, from stirring evenly lift pump 5, high-water 6, low-water level 7, water pump main 8, valve 9, valve well 10, nozzle 11, reverberator 12, anoxic pond 13, suspend facultative mud 14, water outlet weir plate 15, tank 16, mixing liquid pool 17, circularly enhancing pump 18, mixed-liquor return overflow port 19, mixed-liquor return outlet 20, mixed solution promotes supervisor 21, BAF 22, mixed solution cloth tank 23, splash board 24, composite biological packing 25, air communicating pipe 26, water leg 27, jet supervisor 28, Self-priming jet aeration device 29, BAF pillar 30, aeration tank 31, mixed solution connected entrance 32, active sludge 33, settling region 34, mud-water separation district 35, the calcareous filter material 36 of iron, constant control valve 37, first step fluidized bed bio film reaction district 38, suspended biological filler 39, first step settling region 40, blower fan 41, air supervisor 42, air arm 43, first step filtrating area 44, flexible filter filler 45, fluidized bed bio film reaction district, the second stage 6, settling region, the second stage 47, filtrating area, the second stage 48, aluminium matter filter material 49, biological oxidation pipe 50, water shoot 51, sterilization pool 52, sterilization equipment 53, ultrasonic open channel flowmeter pond 54, monitor well 55, rising pipe 56, spoil disposal supervisor 57, mud discharging valve 58, excess sludge discharge valve 59, returned sluge vent valves 60, sludge drying pond 61, sludge drying filtrate 62, insulated building 63, air interchanger 64, emission-control equipment 65, blower fan independently covers 66, increase warmer 67, service platform 68.

Fig. 2 is organigram that is energy-conservation and reduction of discharging type organic town sewage treatment process gravity flow.

In figure: inlet channel 1, grating tank 2, grid 3, adsorption tank 4, from stirring evenly lift pump 5, high-water 6, constant control valve 7-1, water pump main 8, valve 9, vacuum breaker 10-1, nozzle 11, reverberator 12, anoxic pond 13, suspend facultative mud 14, water outlet weir plate 15, tank 16, mixing liquid pool 17, circularly enhancing pump 18, mixed-liquor return overflow port 19, mixed-liquor return outlet 20, mixed solution promotes supervisor 21, BAF 22, mixed solution cloth tank 23, splash board 24, composite biological packing 25, air communicating pipe 26, water leg 27, jet supervisor 28, Self-priming jet aeration device 29, BAF pillar 30, aeration tank 31, mixed solution connected entrance 32, active sludge 33, settling region 34, mud-water separation district 35, the calcareous filter material 36 of iron, constant control valve 37, first step fluidized bed bio film reaction district 38, suspended biological filler 39, first step settling region 40, blower fan 41, air supervisor 42, air arm 43, first step filtrating area 44, flexible filter filler 45, fluidized bed bio film reaction district, the second stage 46, settling region, the second stage 47, filtrating area, the second stage 48, aluminium matter filter material 49, biological oxidation pipe 50, water shoot 51, sterilization pool 52, sterilization equipment 53, ultrasonic open channel flowmeter pond 54, monitor well 55, rising pipe 56, spoil disposal supervisor 57, mud discharging valve 58, excess sludge discharge valve 59, returned sluge vent valves 60, sludge drying pond 61, sludge drying filtrate 62, insulated building 63, air interchanger 64, emission-control equipment 65, blower fan independently covers 66, increase warmer 67, service platform 68.

Below more by reference to the accompanying drawings 1 and embodiment the present invention will be further described:

The structure of embodiment 1 Sewage treatment systems of the present invention and technique

Take Technology as the leading factor with hoisting type to make an explanation, structure is shown in Fig. 1:

1, sewage is collected by city planting ductwork, the grating tank 2 of waste disposal plant front end is entered by inlet channel 1, be provided with artificial grid or mechanical grille 3 in grating tank 2, remove the solid matter that may block from stirring evenly lift pump 5 larger in sewage, grid slag regularly transports outward disposal.

Sewage after grid 3 processes enters adsorption tank 4, arranges sewage from stirring evenly lift pump 5 in adsorption tank 4 pond, certainly stirs evenly lift pump 5 and realizes high-water 6 and run low-water level 7 and shut down.Sewage is from stirring evenly lift pump 5 zero prioritizing selection automatic uniform mixing pollution discharging pump, be characterized in: this residual sea water pump device rotates with motor shaft, produce extremely strong whipping force, settling in sewage lagoon is stirred into suspended substance, discharge in suction pump, improve anti-blocking, the pollution discharge capability of pump, disposablely complete draining, remove contamination, except becoming silted up, having saved running cost.The flow prioritizing selection of lift pump is about 1.2 times of sewage load, and object promotes mixed-liquor return in subsequent treatment process and sludge reflux, guarantees the realization of denitrification dephosphorization technique.

From stirring evenly on lift pump 5 water pump main 8, valve 9, valve well 10 are being set.

Adsorption tank 4 is also known as biological treatment pond, this adsorption tank is without the need to adding chemical floc, directly utilize microorganism cells and meta-bolites thereof as sorbent material and flocculation agent, by the physical adsorption to pollution substance, chemisorption, biological adsorption and adsorption, and adsorption bridging, electrical counteract, sedimentation screen such as to catch at the throwing out, particulate matter less in sewage and a part of colloidalmaterial are converted into the integral part of biological floe, and by settling of floccus effect, it are removed fast.

2, the combined sewage (containing mixed solution and returned sluge) in adsorption tank 4 pond is through rising to anoxic pond 13 from stirring evenly lift pump 5, anoxic pond 13 inner bottom part arranges reverberator 12, combined sewage with pressure is by nozzle 11 directive reverberator 12, sewage is again spread to surrounding by reverberator 12 and is passed the activated sludge layer in anoxic pond 13, active sludge is stirred, forms oxygen fluidized-bed of holding concurrently.

The effect of anoxic pond 13 is denitrification denitrogenations, also bears biological treatment function.

Under the condition of mixed solution and returned sluge, in oxygen-starved area, dissolved oxygen can meet growing of denitrifying bacteria and breed, sewage carries out anti-nitration reaction under the effect of denitrifying bacteria, be nitrogen by nitrate transformation, achieve the preposition denitrogenation of system, the organism that the carbon source of denitrification denitrogenation process need derives from raw waste water is done.

Above-mentioned denitrification process is the process of denitrifying bacteria alienation nitrate, the NO3-N and NO2-N namely produced by nitrifier under the effect of denitrifying bacteria, the process of overflowing from water after being reduced to nitrogen.Denitrification process will carry out under double oxygen condition, and the concentration of dissolved oxygen can not more than 0.5mg/L, otherwise denitrification process will stop.Denitrification process is also divided into two steps to carry out, and the first step is nitrite by nitrate transformation, and second step is nitrogen protoxide, nitrous oxide and nitrogen by Nitrite transformation.

Dissolved oxygen in anoxic pond 13 controls: 0.50mg/L >=DO >=0.20mg/L.

In anoxic pond 13, dwell time of sewage is 60 ~ 240min, preferred 180min.

Anoxic pond 13 top set out weir board 15, tank 16, ensure sewage equilibrium flowing, avoid the short flow image of sewage to occur, realize mud-water separation simultaneously.Mud discharging pipe and mud discharging valve 58 is provided with bottom anoxic pond 13.

Above process facility is strenuous primary treatment system, SS (suspended substance) clearance can reach more than 70%, COD (chemical oxygen demand (COD)), BOD (biochemical oxygen demand (BOD)), ammonia nitrogen and total tp removal rate can reach more than 45%, 65%, 50% and 25% respectively.

3, anoxic pond 13 water outlet enters mixing liquid pool 17, and mixing liquid pool 17 installs a set of or a set of above low pressure recycle lift pump 18.

4, sewage in mixing liquid pool 17 promotes supervisor 21 through low pressure recycle lift pump 18 by mixed solution and rises to high-load aerating biological filter 22, first sewage enter the mixed solution cloth tank 23 at high-load aerating biological filter 22 top, several cloth tanks 23 are evenly distributed on high-load aerating biological filter 23 top, cloth tank 23 is rectangle or other shapes, equally distributed water distributor is provided with bottom each cloth tank 23, splash board 24 is installed below water distributor, composite biological packing 25 is installed below splash board 24, sewage is flowed out by the water distributor below cloth tank, be dropped on splash board 24, form the tiny globule (containing part water smoke), the globule contacts with air, the globule carrying dissolved oxygen evenly scatters on the composite biological packing 25 below splash board 24, biologic packing material is attached with microbial film, sewage carries out biological degradation at this.

The bottom of mixing liquid pool 17 is communicated with by mixed solution connected entrance 32 with bottom aeration tank 31.The sewage containing active sludge in aeration tank 31 constantly enters mixing liquid pool 17, high-load aerating biological filter 22 is entered by arranging low pressure recycle lift pump 18 lifting in mixing liquid pool 17, sewage enters again aeration tank 31, reciprocation cycle after high-load aerating biological filter 22 processes, and goes round and begins again.

Arrange mixed-liquor return overflow port 19 in mixing liquid pool 17, aeration tank 31 water outlet arranges constant control valve 37, and unnecessary mixed solution enters adsorption tank 4 by mixed-liquor return outlet 20.

Low pressure recycle lift pump 18 arranges cycling service, then form the processing mode of aerobic-anoxic-aerobic in high-load aerating biological filter 22.

High-load aerating biological filter 22 overcomes the shortcoming of ordinary biofilter, takes low pressure recycle lift pump 18 to reflux measure, reduces influent concentration, homogenizing and stable influent quality, ensures the BOD of water inlet ₅at below 200mg/L, make filler under being constantly washed, microbial film constantly comes off renewal, accelerate biomembranous update, oxygen in air constantly spreads in sewage, prevents the hypertrophy of anaerobic layer, keeps biomembranous activity, excessively growing of effective suppression filter tank fly, reduces stink.High-load aerating biological filter solves and takes up an area large, susceptible to plugging problem simultaneously.

Be provided with air communicating pipe 26 bottom high-load aerating biological filter 22, middle part is provided with upflow tube.

Arrange the sewage that water leg 27 collects bottom high-load aerating biological filter 22 and enter Self-priming jet aeration device 29 by jet supervisor 28, the air mixed that sewage is sucked by Self-priming jet aeration device 29 and negative pressure, formation mixing wastewater with air liquid enters aeration tank 31.

Aeration tank 31 of the present invention, have followed cyclic activated sludge system form, sewage enters high-load aerating biological filter 22 from mixing liquid pool, aeration tank 31 is entered by Self-priming jet aeration device 29 by high-load aerating biological filter 22, communicated by mixed solution connected entrance 32 bottom aeration tank 31 with bottom mixing liquid pool 17, reciprocation cycle, low pressure recycle lift pump 18 intermitten service, aeration tank 31 possesses cyclic activated sludge system feature completely: anoxic, anaerobism, aerobicly to hocket, effectively remove organic pollutant, realize denitrogenation dephosphorizing simultaneously.

Load active sludge 33 in aeration tank 31, bottom, aeration tank 31 is settling region 34, and bottom is provided with mud discharging pipe and mud discharging valve 58.

Both sides, aeration tank 31 or be one-sidedly provided with mud-water separation district 35.

Mud-water separation district 35 built with the calcareous filter material 36 of iron, the thread iron filings of iron calcareous filter material prioritizing selection after acidification.

Top, mud-water separation district 35 sets out weir board 15, tank 16, ensures sewage equilibrium flowing, avoids the short flow image of sewage to occur, realizes mud-water separation simultaneously.

Between aeration tank 31 water outlet and first step fluidized bed bio film reaction district 38 water-in, constant control valve 37 is set, guarantees that sewage load constant runs.

In Self-priming jet aeration bacteria filter system, dwell time of sewage is 60 ~ 240min, preferred 180min.

Above process facility is Self-priming jet aeration bacteria filter system, and SS clearance can reach more than 80%, COD, BOD, ammonia nitrogen and total tp removal rate can reach more than 80%, 75%, 60% and 65% respectively.

5, aeration tank 31 water outlet enters first step fluidized bed bio film reaction district 38, first step fluidized bed bio film reaction district 38, fluidized bed bio film reaction district, the second stage 46 adopts MBBR (MBBR) technology, it is the new high-efficiency reactor between activated sludge process and fixed biologically embrane method, the filler that in reactor, specific surface area is larger is because being stirred in free movement in water, sewage is continuously across when being equipped with the reactor of Moveable packings, biofilm growth formation on filler, microorganism amount reproduction on microbial film, heterotrophism and autotrophic microorganism utilize the C in water, N, P etc. carry out metabolism, thus play the effect of purifying waste water.

Suspended biological filler 39 is under aeration or mechanical agitation, and ensure that waste water extensively and continually contacts with the microbial film be grown on carrier, while improving system mass-transfer efficiency, the renewal of enhanced biological membrane micro, keeps and improve biomembranous activity.For preventing the loss of filler in reaction tank, be provided with the plastic grid of high strength between filler fluidization regions, fluidized bed bio film reaction pond and settling region, the plastic grid of high strength prevents MBBR filler special from entering settling region.

Sewage is after first step fluidized bed bio film reaction district 38, first step settling region 40, first step filtrating area 44 process, supernatant liquor enters fluidized bed bio film reaction district, the second stage 46, settling region, the second stage 47, filtrating area, the second stage 48 process, and fluidized bed bio film reaction district, the second stage 46 is identical with a fluidized bed bio film reaction district 38.

Oxygen in first step fluidized bed bio film reaction district 38, fluidized bed bio film reaction district, the second stage 46 is supplied by air supervisor 42, air arm 43 by blower fan 41.

Be provided with suspended biological filler 39 in first step fluidized bed bio film reaction district 38, fluidized bed bio film reaction district, the second stage 46, suspended biological filler 39 is MBBR filler special preferably.

In first step fluidized bed bio film reaction district 38, fluidized bed bio film reaction district, the second stage 46, bottom is provided with micropore aeration pipe or other aerators.

Upper end, fluidized bed bio film reaction district 3846 is water-in, it is suspended biological filler 39 fluidization regions in reaction zone, bottom is settling region 4047, be plastic grid and the micropore aeration pipe of high strength between fluidization regions and settling region, settling region 4047 water outlet is connected with bottom filtrating area 4448, flexible filter filler 45, water outlet weir plate 15, tank 16 are installed in first step filtrating area 44, aluminium matter filter material and fibre bundle filtration filler 49, back-purge system, biological oxidation pipe 50, tank 16, counter-flushing liquid blowdown system are installed in filtrating area, the second stage 48.

Filtrating area, the second stage 48 has precipitation, filtering function, and fibre bundle filtration filler, biological oxidation pipe 50 have mud-water separation effect, the SS < 5mg/L after filtrating area, the second stage 48 processes.

Compound fluidized bed bio film reaction pond has sewage disposal, precipitation, filtering function, organically combines in same structures, realizes without pump mud automatic back flow, save energy.

The first step, second stage fluidized bed bio film reaction pool bottom sludge regularly enter drying and other treatment in sludge drying pond 61 by shore pipe, mud discharging valve 58, spoil disposal supervisor 57, excess sludge discharge valve 59, sludge drying filtrate 62 is equipped with in sludge drying pond 61, and mummification filtrate enters adsorption tank 4.

Sewage is 2 ~ 3 hours residence time of difference in the first step, fluidized bed bio film reaction district, the second stage 3846, preferably 2.5 hours.

Sewage is 1 ~ 2 hour residence time of difference in the first step, settling region, the second stage 4047, preferably 1.5 hours.

Sewage is 1 ~ 3 hour residence time of difference in the first step, filtrating area, the second stage 4448, preferably 2 hours.

The blower fan working hour is 6 ~ 12 hours; inflow temperature below 12 degrees Celsius preferably 10 hours; inflow temperature more than 12 degrees Celsius preferably 8 hours; the start and stop of blower fan are controlled by the time relay; according to the change of different flooding quantitys and seasonal temperature; select operation 5 ~ 30 minutes, shut down 55 ~ 30 minutes.For this reason, the dissolved oxygen in the first step, pond, fluidized bed bio film reaction district 3846, the second stage controls reciprocation cycle between 0 ~ 5mg/L,---anaerobism---the aerobic operation process section that reaches anoxic, thus achieves the object of denitrogenation dephosphorizing.

Above process facility is compound fluidized bed bio film reaction cell system, and SS clearance can reach more than 80%, COD, BOD, ammonia nitrogen and total tp removal rate can reach more than 85%, 85%, 70% and 65% respectively.

6, filtrating area, the second stage 48 water outlet enters sterilization pool 52 disinfection.Concentration of suspension < 10mg/L in water outlet water, prioritizing selection Ultraviolet Disinfection.Selective irradiation intensity is 25 ~ 30 μ W/cm ², irradiation time > 10s, prioritizing selection irradiation time is 15s, adopts open channel type.

Sterilization equipment 53 can be UV sterilizer or ozonizer, also can be chlorine dioxide generator or other sterilization equipments.The dosing method of sterilizing agent can adopt conventional any one.According to relevant laws and regulations, chlorine residue needs to remove.

Sterilization pool 52 water outlet enters ultrasonic open channel flowmeter pond 54, is provided with under meter, preferentially selects open channel supersonic flowmeter in ultrasonic open channel flowmeter pond 54.

Sewage through energy-conservation with reduction of discharging type organic town sewage treatment process process after enter water body by monitor well 55, rising pipe 56.

7, preferably two groups, sludge drying pond, single group complete dewatered sludge after, add a certain amount of lime disinfection, then anaerobic composting stabilization treatment is covered with element soil, the preferred 180d for the treatment of cycle, degradation effect of organic compound > 40%, two groups of sludge drying pond rotations use.

8, in the north or height above sea level district higher, wastewater influent water temperature is lower, is not suitable with microbial growth breeding, needs to carry out isothermal holding to sewage treatment facility, normally could complete biological sewage treatment.

Long-term temperature on average is lower than the area of less than 5 degrees Celsius, and the design preferably adopts the mode increasing warmer combined in day-light greenhouse and Ventilator Room to be incubated, and also can adopt other known technologies.

Long-term temperature on average is between 5 ~ 12 degrees Celsius, and the design preferably adopts concurrent heating in Ventilator Room, enters in treatment tank by blower fan heat air delivery, also can adopt other known technologies.

9, sewage is through strenuous primary treatment, Self-priming jet aeration biological filter, the process of compound fluidized bed bio film reaction pond, primary standard A standard that discharge water reaches " urban wastewater treatment firm pollutant emission standard " (GB18918-2002): chemical oxygen demand (COD) (COD)≤50mg/L, biochemical oxygen demand (BOD) (BOD5)≤10mg/L, suspended substance (SS)≤10mg/L, vegetable and animals oils≤1mg/L, petroleum-type≤1mg/L, anion surfactant≤0.5mg/L, total nitrogen (in N)≤15mg/L, ammonia nitrogen (in N)≤5 (8) mg/L, total phosphorus (in P)≤0.5mg/L, colourity (extension rate)≤30, pH6 ~ 9, excrement colibacillus group number (individual/L)≤10 ³.

The process experiment of embodiment newly-built samll cities and towns

New construction samll cities and towns, annual weather is at about 18 DEG C, winter minimum temperature is on average at 6 ~ 8 DEG C, summer is hotter, August in July, daily maximum temperature was all more than 35 degree, sewage disposal scale is 5000 tons/day (250 tons/hour), and a point second phase implements, and first phase sewage disposal scale is 2500 tons/day (125 tons/hour).

One, sewage is hoisting type process, and structure unit is as follows:

1, adsorption tank is four groups, and single group process is:

4.8m × 4.8m × 4.5m, pond holds for 414.72m ³;

2, anoxic pond is four groups, and single group process is:

4.8m × 4.8m × 4.5m, pond holds for 414.72m ³;

3, aeration tank is four groups, and single group process is:

7.5m × 4.8m × 4.9m, pond holds for 705.60m ³;

4, one-level fluidized bed bio film reaction pond is four groups, and single group process is:

4.8m × 4.8m × 4.9m, pond holds for 451.58m ³;

5, two groups, single filter district, single group process is:

9.9m × 2.4m × 4.9m, pond holds for 232.85m ³;

6, secondary fluidized-bed biomembrane reaction pond is four groups, and single group process is:

4.8m × 4.8m × 4.9m, pond holds for 451.58m ³;

7, two groups, cascade filtration district, single group process is:

9.9m × 2.4m × 4.9m, pond holds for 232.85m ³;

8, sludge drying pond is placed in adsorption tank upper end, is four groups, and single group process is:

4.8m × 2.4m × 1.5m, pond holds for 69.12m ³;

9, first phase sewage disposal scale is 2500 tons/day (125 tons/hour) total floor space 701.73m ², total pond holds 2973.02m ³.

Two, electromechanical equipment configuration is as follows:

1, mechanical grille is arranged: Q=1250m ³/ d (62.50m ³/ h) arrange 2, annual operation one, fault puts into operation automatically, and power is 0.37kw, runs 3 minutes, shuts down 25 minutes.

2, promote water pump to arrange: little water yield list pump (small power) is run, big yield list pump (mid power) runs, and surcharge water level double pump runs.

3, little water yield list pump is 100JYWQ80-9-2000-4kw (automatically stirring evenly no-blocking pollution discharging pump), and big yield list pump is 150JYWQ150-10-2000-7.5kw (automatically stirring evenly no-blocking pollution discharging pump), and surcharge water level double pump runs automatically.

4, BAF list pump is 100JYWQ110-10-2000-5.5kw (automatically stirring evenly no-blocking pollution discharging pump), is 4 covers, runs 15 minutes, shuts down 45 minutes.

5, MBBR pond blower fan is HC-100S-4.11m ³/ min-5.5kw (rotary blower) is two covers, runs 15 minutes, shuts down 45 minutes.

Three, investment, occupation of land and running cost are adjusted

(1) invest

1, structures expense:

2973.02m ³× 1000 yuan/m ³=2973020.00 yuan;

2, other off-set facility:

2973020.00 × 30%=891906.00 is first; 3864926

3, processing unit:

Ton water invests 1500 yuan, counts 3750000.00 yuan;

4, gross investment:

7614926.00 first;

5, unit ton water investment:

7614926.00 yuan of ÷ 2500 tons=3045.9704 yuan/ton. sewage.

(2) take up an area

Unit ton water takes up an area:

701.73m ²÷ 2500 tons=0.280692m ²/ ton. sewage.

(3) operating cost analysis

1, grid maker: 0.37kw × 4h/d=1.48kw.h/d;

2, water pump: 7.5kw × 20h/d=150kw.h/d;

3, reflux pump: 5.5kw × 6h/d × 4 cover=132kw.h/d;

4, blower fan: 5.5kw × 6h/d × 2 cover=66kw.h/d;

5, add up to: 349.48kw.h/d, by 0.8 yuan/degree, electric cost expenditure: 279.584 yuan/d;

6, ton water running expense: 279.584 yuan/d ÷, 2500 tons/d=0.1118336 yuan/ton;

7, ton water current consumption: 349.48kw.h/d ÷ 2500 tons/d=0.139792kw.h/ ton.

8, electric control system is simple, and two people are on duty, and total priming cost of running is about 0.20 yuan/ton of sewage.

Handled town domestic sewage water quality is as follows: chemical oxygen demand (COD) (COD) mean value is 400mg/L, biochemical oxygen demand (BOD) (BOD ₅) mean value is 200mg/L, suspended substance (SS) mean value is 200mg/L, ammonia nitrogen (in N) mean value is 35mg/L, total phosphorus (in P) mean value is 4.5mg/L, pH=7.8.

Effluent quality after process is as follows: chemical oxygen demand (COD) (COD) is 35mg/L (clearance 91.25%), biochemical oxygen demand (BOD) (BOD ₅) for 6mg/L (clearance 97.00%), suspended substance (SS) be 3mg/L (clearance 98.50%), ammonia nitrogen (in N) is 1mg/L (clearance 97.14%), total phosphorus (in P) is 0.4mg/L (clearance 91.11%), pH=7.9.

Concrete treating processes is as follows:

1) strenuous primary treatment: town domestic sewage is introduced grating tank, adsorption tank, enters anoxic pond by certainly stirring evenly lift pump by sewage lifting, and main SS, organic pollutant, ammonia nitrogen, the total phosphorus removed in sewage, for subsequent treatment process reduces the heavy burdens.

2) Self-priming jet aeration bacteria filter system: sewage enters the process of Self-priming jet aeration bacteria filter system after strenuous primary treatment, mainly removes SS, COD, BOD, ammonia nitrogen, total phosphorus.

Self-priming jet aeration biological filtering tank process, utilizes " Running water never becomes putrid ", air to the principle of natural diffuseness in sewage, improves dissolved oxygen concentration in sewage, guarantee that microorganism is degraded to organic pollutant under aerobic condition.Self-priming jet aeration bacteria filter system has the feature of BAF, this device has the effect of removing SS, COD, BOD, ammonia nitrogen, total phosphorus, removal AOX (objectionable impurities), collect bio-oxidation and retain suspended solids one, save post precipitation pond (second pond), have volumetric loading, hydraulic load is large, hydraulic detention time is short, required initial cost is few, effluent quality is good, and operation energy consumption is low, the feature that working cost is few.Meanwhile, Self-priming jet aeration biological filter and aeration tank are combined, and activated sludge process and biomembrance process are organically combined, and have the function of activated sludge process and biomembrance process, realize wastewater efficient purifying treatment.

3) compound fluidized bed bio film reaction cell system: sewage enters the process of compound fluidized bed bio film reaction cell system after the process of Self-priming jet aeration bacteria filter system, the remaining SS of main removal pre-treatment, COD, BOD, ammonia nitrogen, total phosphorus.Sewage through follow-up disinfection apparatus process, realizes sewage qualified discharge or regeneration more completely.

The technique that compound fluidized bed bio film reaction cell system is combined by modified form fluidized bed bio film reaction pond, settling tank, biological filter and clean water basin, this technique also has the feature of cyclic activated sludge system, biological aerated filter process except having the feature of fluidized bed bio film, there is again the function of mud automatic back flow, sludge settling, sewage purification filtration and clean water basin simultaneously, save secondary sedimentation basins and clean water basin.

The gravity flow treatment system of Fig. 2 display, the difference of its hoisting type treatment system with Fig. 1 is automatically to stir evenly lift pump installing in adsorption tank.Slightly higher than anoxic pond bottom adsorption tank, the sewage in adsorption tank can flow automatically in anoxic pond.Bottom adsorption tank, water outlet is provided with one or more sets flow control valves, the Valve controlling discharge of sewage, ensures the equilibrium of subsequent technique hydraulic load and steady running.

Claims

1. energy-saving and emission-reducing town sewage treatment system, comprises strenuous primary treatment system, Self-priming jet aeration bacteria filter system, compound fluidized bed bio film reaction cell system, sludge treatment return-flow system and Winter protection system, it is characterized in that:

Described sludge treatment return-flow system are made up of spoil disposal supervisor, mud discharging valve, excess sludge discharge valve, returned sluge vent valves, sludge drying pond and sludge drying filtrate; Described sludge drying pond is at least one; Described spoil disposal supervisor arranges gas boosting conducting sludge drainage system, described sludge treatment return-flow system is also provided with from stirring evenly lift pump;

Be provided with mud discharging valve bottom described anoxic pond, aeration tank, first step fluidized bed bio film reaction pond, fluidized bed bio film reaction pond, the second stage to be responsible for blowdown and to be connected; First step fluidized bed bio film reaction is provided with first step settling region in pond, and the second stage is provided with settling region, the second stage in fluidized bed bio film reaction pond;

In the first step, fluidized bed bio film reaction pond, the second stage, the residence time is 2 ~ 3 hours to sewage respectively; In the first step, settling region, the second stage, the residence time is 1 ~ 2 hour to sewage respectively; Inflow temperature blower fan working hour below 12 degrees Celsius is 10 hours, and inflow temperature blower fan working hour more than 12 degrees Celsius is 8 hours.

2. energy-saving and emission-reducing town sewage treatment system as claimed in claim 1, is characterized in that: described BAF is made up of pond body, cloth tank, water distributor, splash board, biologic packing material, breather hole, upflow tube, water leg, jet supervisor and Self-priming jet aeration device.

3. the energy-saving and emission-reducing town sewage treatment system as described in any one of claim 1 ~ 2, it is characterized in that: described aeration tank is made up of pond body, aeration zone, settling region, mud-water separation district, dephosphorization filtrating area, water leg and constant control valve, aeration tank is built with active sludge, the both sides of aeration tank or one-sided mud-water separation district and dephosphorization filter packing district are set, bottom, aeration tank is settling region; The dephosphorization filter packing in described dephosphorization filter packing district is the calcareous filter material of iron.

4. energy-saving and emission-reducing town sewage treatment system as claimed in claim 1 or 2, is characterized in that:

Described first step fluidized bed bio film reaction pond is made up of first step fluidized bed bio film reaction district, first step settling region, first step filtrating area; Described first step fluidized bed bio film reaction district is first step filler fluidization regions, be first step settling region bottom first step filler fluidization regions, first step settling region communicates with bottom first step filtrating area, top, first step filtrating area is connected with tank, and tank is communicated with top, fluidized bed bio film reaction pond, the second stage; Between first step fluidized bed bio film reaction district and first step settling region, micropore aeration pipe is installed;

Described fluidized bed bio film reaction pond, the second stage is made up of fluidized bed bio film reaction district, the second stage, settling region, the second stage, filtrating area, the second stage; Described fluidized bed bio film reaction district, the second stage is filler fluidization regions, the second stage, be settling region, the second stage bottom filler fluidization regions, the second stage, settling region, the second stage communicates with bottom filtrating area, the second stage, and top, filtrating area, the second stage is connected with biological oxidation pipe, tank, and tank is communicated with water shoot; Between fluidized bed bio film reaction district, the second stage and settling region, the second stage, micropore aeration pipe is installed;

In described first step filtrating area, flexible filter filler is installed; Aluminium matter filter material, fibre bundle filtration filler and gas back-flushing system are installed in filtrating area, the second stage.

5. energy-saving and emission-reducing town sewage treatment system as claimed in claim 3, is characterized in that:

6. energy-saving and emission-reducing town sewage treatment system as claimed in claim 1 or 2, it is characterized in that: described insulation main body is the house of brick mix structure, the factory building of steel construction, standard day-light greenhouse, and described heat energy feeder for arrange increasing warmer in Ventilator Room.

7. energy-saving and emission-reducing town sewage treatment system as claimed in claim 3, it is characterized in that: described insulation main body is the house of brick mix structure, the factory building of steel construction, standard day-light greenhouse, and described heat energy feeder for arrange increasing warmer in Ventilator Room.

8. energy-saving and emission-reducing town sewage treatment system as claimed in claim 4, it is characterized in that: described insulation main body is the house of brick mix structure, the factory building of steel construction, standard day-light greenhouse, and described heat energy feeder for arrange increasing warmer in Ventilator Room.

9. energy-saving and emission-reducing town sewage treatment system as claimed in claim 1 or 2, is characterized in that: in the first step, fluidized bed bio film reaction pond, the second stage, the residence time is 2.5 hours to sewage respectively; Sewage is 1.5 hours residence time of difference in the first step, settling region, the second stage.

10. energy-saving and emission-reducing town sewage treatment system as claimed in claim 3, is characterized in that: in the first step, fluidized bed bio film reaction pond, the second stage, the residence time is 2.5 hours to sewage respectively; Sewage is 1.5 hours residence time of difference in the first step, settling region, the second stage.

11. energy-saving and emission-reducing town sewage treatment systems as claimed in claim 4, is characterized in that: in the first step, fluidized bed bio film reaction pond, the second stage, the residence time is 2.5 hours to sewage respectively; Sewage is 1.5 hours residence time of difference in the first step, settling region, the second stage.

12. energy-saving and emission-reducing town sewage treatment systems as claimed in claim 6, is characterized in that: in the first step, fluidized bed bio film reaction pond, the second stage, the residence time is 2.5 hours to sewage respectively; Sewage is 1.5 hours residence time of difference in the first step, settling region, the second stage.

13. energy-saving and emission-reducing town sewage treatment systems as claimed in claim 1 or 2, is characterized in that: the construction modularization of Sewage treatment systems.

14. energy-saving and emission-reducing town sewage treatment systems as claimed in claim 3, is characterized in that: the construction modularization of Sewage treatment systems.

15. energy-saving and emission-reducing town sewage treatment systems as claimed in claim 4, is characterized in that: the construction modularization of Sewage treatment systems.

16. energy-saving and emission-reducing town sewage treatment systems as claimed in claim 6, is characterized in that: the construction modularization of Sewage treatment systems.

17. energy-saving and emission-reducing town sewage treatment systems as claimed in claim 9, is characterized in that: the construction modularization of Sewage treatment systems.