CN103910463B - Novel process for BC urban sewage treatment - Google Patents

Novel process for BC urban sewage treatment Download PDF

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CN103910463B
CN103910463B CN201310586341.7A CN201310586341A CN103910463B CN 103910463 B CN103910463 B CN 103910463B CN 201310586341 A CN201310586341 A CN 201310586341A CN 103910463 B CN103910463 B CN 103910463B
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sewage
aeration tank
bc
water outlet
js
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CN201310586341.7A
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CN103910463A (en
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柴建中
陈洪福
赵明
杨植
谢丁燕
冯大伟
梅华
王伟伟
刘文武
刘刚
曹美娜
胡生虎
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青海洁神环境能源产业有限公司
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Abstract

The invention discloses a novel process for BC urban sewage treatment, relates to a sewage treatment process, and particularly relates to the novel process for the BC urban sewage treatment. According to the method, the sewage is discharged after being processed by a municipal pipe, a coarse screen well, a sewage pump well, a fine screen well, a grit chamber, JS-BC equipment, an aeration tank, a secondary sedimentation tank, a disinfection system and a measuring tank. The method has efficient nitrogen and phosphorus removal capacities and wonderingly BOD removal effect, is in no need of an additional deodorization system, can save energy and floor space, can greatly reduce residual sewage, and is good in effluent water quality. Municipal sewage treated by the method can reach an A-level standard of a discharge standard of pollutants for a municipal wastewater treatment plant.

Description

A kind of BC new urban sewage treatment process

one, technical field

The present invention relates to a kind of sewage treatment process, particularly a kind of BC new urban sewage treatment process.

two, technical background

City domestic sewage is mainly from family, business and urban public utilities etc., organism is the principal pollutant of sanitary sewage, such as: starch, protein, carbohydrate and plant wet goods, the chemical oxygen demand (COD) of city domestic sewage, biological oxygen demand, total nitrogen and total phosphorus content are all relatively high.When nitrogen content and the higher water quality of phosphorus content enter nature, easily cause the eutrophication of water body, cause algae raised growth to breed, time serious, red tide and wawter bloom can be caused, thus water quality deterioration, contaminate environment.The principal pollutant of city domestic sewage are organism.For sanitary sewage, mainly adopt biological process both at home and abroad at present.Biological process comprises activated sludge process, the large class of biomembrance process two, and again based on activated sludge process, activated sludge process has a variety of pattern, i.e. conventional activated sludge process, adsorption biodegradation, SBR and modification technique thereof, oxidation ditch process, A/O technique, A 2o technique etc.

Traditional activated sludge process technique: use technique the earliest, the efficiency of its organics removal is very high, the mud that produces in treating processes adopts anaerobic digestion mode to carry out stabilizing treatment, and the pollution offseted except sewage and mud is very effective, and energy consumption and working cost all lower.But it is not high to the removal efficiency of nitrogen phosphorus.

AB method technique: twice biochemical treatment adopting absorption regeneration and traditional activated sludge process, technique unit forms more complicated, and mud is unstable, construction investment and processing cost high.This method is the treatment process of the special occasions designed for high concentration sewage water.

Oxidation ditch process: oxidation ditch has another name called oxidation canal, the planeform of ditch body ringwise, rectangle, L shape, circle or other shapes, there is unique hydraulics characteristic and performance characteristics.Compare with traditional activated sludge process, oxidation ditch process obviously can save preliminary sedimentation tank and sludge digestion tank, and flow process is simplified, and effluent quality is than good in the past, and operation enterprise is also more convenient, and working cost also compares saving.Oxidation ditch utilizes continuous ring type reaction tank to make biological reaction tank, oxidation ditch provides very large extension rate and improves surge capability, be generally several times and even the decades of times of wastewater influent flow, the residence time of water in ditch is longer, also has good processing power to the organism of not easily degrading.China also in succession adopts all kinds of municipal effluent of this art breading from the eighties in 20th century, achieves good effect.And development and evolution becomes various ways in practice, as T-shaped oxidation ditch and DE type oxidation ditch, Orbal oxidation ditch.T-shaped three working position collection anoxic, aerobic and be deposited in one, hocket reaction and precipitation, and flow process is succinct, has biological denitrificaion function.Carrousel oxidation ditch has the characteristic of mixing and plug-flow completely concurrently, and does not need mixed-liquor return system, but the depth of water is unsuitable excessive, and power efficiency of oxygen supply is low, does not possess denitrogenation dephosphorizing function.

A 2/ O technique: at present apply a kind of more method in biological dephosphorize denitrification technique, belong to simultaneous phosphorus and nitrogen removal technique, utilize anaerobism, anoxic, aerobicly realize organic degradation process, first raw waste water enters anaerobic zone, is converted into small molecules tunning.Waste water enters oxygen-starved area subsequently, reaches the object of carbon elimination and denitrogenation simultaneously.Release energy and can supply growth and breeding own, absorb the dissolved phosphorus in surrounding environment, organism is behind anaerobic zone, oxygen-starved area, and concentration is quite low.A 2/ O technique total hrt is higher than other similar technique, and anaerobism, anoxic and aerobic three districts strictly separate, and is conducive to different microorganisms flora ground flourish, therefore good denitrification dephosphorization effect.Thread fungus can be suppressed to breed, overcome sludge bulking, all can obtain good treatment effect to higher concentration and low concentration.SBR technique: it is that sewage in continuous flow process is introduced into reaction tank that conventional SBR method is disposed of sewage, forms anaerobism, anoxic during water inlet, then enters settling tank mud-water separation, aeration aerating, complete denitrogenation dephosphorizing process, and precipitate in same container.This method does not need returned sluge, without special anaerobic zone, oxygen-starved area, aerobic zone, carry out at times stirring, aeration, precipitation, form anaerobism, anoxic, aerobic processes, sedimentation function is good, and organic matter removal efficiency is high, improves the processing efficiency of used water difficult to degradate, suppress filamentary discharges, do not need second pond and sludge reflux, technique simple.Be applicable to medium and small sewage work.Along with updating of SBR method, SBR method develops into multiple modified form: ICEAS method, CAST method, Unitank method and MSBR method.This several method and conventional SBR method difference are, by arranging many ponds, to operate in turn, batch process.Though this several method has its advantage, every pond all needs to install aerator, and head loss is large, and plant factor is low, and investment is large, and level of automation is quite high.

Biological contact oxidation process technique: this process management is simpler, energy-conservation, also applied widely in China, this technique adopts contact-oxidation pool, the whole filler of sewage submergence of oxygenation, pass through aeration, under the effect of bacteria metabolism, dirty Organic substance in water is removed, and it is obvious that sewage is purified removal effect.Advantage is: in pond, aerobic condition is good, can reach higher volumetric loading, does not need to establish sludge recirculation system, there is not sludge bulking problem, and operational management is simple, has stronger applicable ability to the change of water quality and quantity.The main drawback of biological contact oxidization treatment technology is: by the restriction of design variable and processing set-up, lives in running improper filler and may block as designed, and water distribution aeration is not easily even in addition, may occur dead angle in local.This oxidation style is only applied at present in trade effluent or small-scale sanitary wastewater.

In sum, there is following problem in existing technology: the clearance of nitrogen, phosphorus is not high, and floor space is large, power consumption is high.Nitrogen, phosphorus ligands process are complicated, generally need to relate to that microorganism is nitrated, denitrification, release phosphorus and inhale the processes such as phosphorus.The clearance of traditional activated sludge process to nitrogen and phosphorus is very low, therefore improve at traditional activated sludge process, by extending aeration time, reducing the method raising denitrification abilities such as load operation, but floor space, power consumption and working cost certainly will be added, due to the characteristic of quantitative limitation biological in activated sludge process and polyP bacteria, phosphor-removing effect is also not obvious; The main drawback of biological contact oxidization treatment technology is: by the restriction of design variable and processing set-up, the improper filler of operation of living as designed may block, in addition water distribution aeration is not easily even, may occur dead angle in local, the method is only applied at present in trade effluent or small-scale sanitary wastewater.

three, summary of the invention

For above-mentioned prior art Problems existing, the present invention intends providing a kind of BC new urban sewage treatment process, the technical scheme taked is: a kind of BC new urban sewage treatment process, it is made up of following steps, the first step: sanitary sewage enters through city planting ductwork the pollution substance that large volume removed by coarse rack well, and coarse rack mesh is 25 ~ 100mm, second step: the water outlet of coarse rack well flows into sewage lifting pump sump, then is promoted to fine fack well from sewage lifting pump sump through lift pump, and fine fack will tackle impurities in water and large particulate matter, and fine fack mesh is 1.5 ~ 25mm, 3rd step: the water outlet of fine fack well flows into settling pit, and the precipitate in water is got off by settling pit, 4th step: settling pit water outlet flows into mixing distribution reservoir, in mixing distribution reservoir, second pond returned sluge, aeration tank backflow sewage and Yuan Shui mix, and its blending ratio is 1:1:2, 5th step: add nutritive medium in the water outlet in mixing distribution reservoir, nutritive medium is 1:0.00000004 ~ 1:0.00000008 with water inlet volume ratio, nutritive medium is mainly tropical fresh fruit, edible ethanol and pure mountain spring water composition, adding nutritive medium sewage flows in JS-BC device, JS-BC device comprises biological reaction tank, netted rotary flora contact device, attached microbial film on contact, by gas blower air feed in JS-BC device, sewage is adsorbed by the soil bacteria Bacillus of growth in JS-BC device on carrier, initial breakdown organism wherein and ammonia nitrogen, 6th step: the water outlet in JS-BC device flows into aeration tank, gas blower is to aeration tank air feed, make to keep dissolved oxygen content in aeration tank, sewage is by soil bacteria Bacillus in aeration tank and different oxygen animalcule, nitrifier, denitrifying bacteria, polyP bacteria, protozoon, metazoan synergy, organism remaining in sewage, ammonia nitrogen and phosphorus are removed effectively, the pump of aeration tank backflow is arranged on aeration tank end, is back to mixing distribution reservoir, PAC chemical auxiliary dephosphorization is added in aeration tank, 7th step: the water outlet in aeration tank flows into second pond, and muddy water is separated in second pond, second pond mud is back in mixing distribution reservoir through sludge reflux pump, and second pond residual sludge pump is to sludge treating system process, 8th step: secondary clarifier effluent is discharged through water outlet scale tank after flowing into sterilisation system.

the present invention hasfollowing beneficial effect:

1, efficient denitrogenation dephosphorizing ability

With traditional nitrated, denitrification denitrogenation principle difference, soil bacteria Bacillus directly draws amine (organonitrogen), ammonia nitrogen and ammonium salt, for Institute of Micro-biology utilizes, thus carry out denitrogenation, nitrogen element, enter in mud with the form of organonitrogen, and removed from system by the discharge of excess sludge, change into nitrogen and enter in air.Soil bacteria Bacillus belongs to gram-positive microorganism, compared with Gram-negative bacteria, gram-positive bacteria cell wall than Gram-negative bacteria (mushroom used in general activated sludge process) cell wall thickness and evenly, carry out connection peptides glycan mainly through peptide bond and form cell walls.The cell walls of gram-positive microorganism contains a large amount of teichoic acids.That is, in the building-up reactions of microorganism, phosphoric acid salt enters in the cell walls of soil bacteria Bacillus with the form of teichoic acid, finally by discharge dephosphorization from system of excess sludge.Soil bacteria Bacillus can be absorbed during ammonia NH state before the nitrogen composition oxidation in sewage, absorb at short notice, the part in the middle of the nitrogen absorbed, absorbed using by as nutrient when breeding utilize.Say from biology, the picked-up of phosphorus is maximum value when dissolved oxygen concentration 0.5mg/l.But, one of best growth condition of soil bacteria (Bacillus) be dissolved oxygen concentration in aerator tank at 0.1 ~ 1.2mg/l, the two condition conforms to, therefore, effectively can carry out dephosphorization, by the general clearance of soil bacteria Bacillus dephosphorization more than 80%.

2, extra deodoration system is not needed

Soil bacteria (Bacillus) has the ability of transient absorption, decompose odor, can suppress the generation of foul smell when sewage is through JSBC art breading.Therefore the foul smell problem, perplexing sewage treatment facility is satisfactorily resolved.Because soil bacteria Bacillus itself has deodorizing capability, substantially mud and foul smell is there is not in the treating processes of JSBC technique, its biochemical process section, sludge treatment section can not need to carry out extra deodorizing process, can reduce the investment cost of sewage work to deodoration system like this.

3, surprised BOD removes effect

Soil bacteria has the capacity of decomposition that specific activity sludge bacteria exceeds decades of times, therefore, can process in the state without dilution completely, and the overall size for the treatment of facility can be made to diminish.

4, space is taken up an area in energy-conservation, saving

More than 50% of BOD loading can be removed in JS-BC system, by JS-BC device.In addition, the dissolved oxygen concentration in aerator tank can meet under being in the condition of lower concentration (0.1 ~ 1.2mg/l).Therefore, required aeration capacity significantly reduces than common activated sludge process.Do not need the attendant equipments such as odor removal in overall Sewage treatment systems in addition, amid all these factors, can save energy be realized.JS-BC device is miniaturization device, can be arranged on tank, significantly can reduce the capacity of aerator tank simultaneously, not need deodorizing and relevant device, therefore significantly can save and take up an area space.

5, significantly excess sludge is reduced

50% of BOD loading can be removed by JS-BC device, the load of aerator tank therefore can be made to reduce and significantly reduce the generating capacity of excess sludge.

6, water quality is discharged good

Municipal wastewater through the inventive method process can reach " urban wastewater treatment firm pollutant emission standard " (GB18918-2002 > one-level A standard.

Four, accompanying drawing explanation

Fig. 1 is present invention process schema

five, embodiment:

Embodiment 1: a kind of BC new urban sewage treatment process, it is made up of following steps, the first step: sanitary sewage enters through city planting ductwork the pollution substance that large volume removed by coarse rack well, and coarse rack mesh is 25 mm, second step: the water outlet of coarse rack well flows into sewage lifting pump sump, then is promoted to fine fack well from sewage lifting pump sump through lift pump, and fine fack will tackle impurities in water and large particulate matter, and fine fack mesh is 1.5mm, 3rd step: the water outlet of fine fack well flows into settling pit, and the precipitate in water is got off by settling pit, 4th step: settling pit water outlet flows into mixing distribution reservoir, in mixing distribution reservoir, second pond returned sluge, aeration tank backflow sewage and Yuan Shui mix, and its blending ratio is 1:1:2, 5th step: add nutritive medium in the water outlet in mixing distribution reservoir, nutritive medium is 1:0.00000004 ~ 1:0.00000008 with water inlet volume ratio, nutritive medium is mainly tropical fresh fruit, edible ethanol and pure mountain spring water composition, adding nutritive medium sewage flows in JS-BC device, JS-BC device comprises biological reaction tank, netted rotary flora contact device, attached microbial film on contact, by gas blower air feed in JS-BC device, sewage is adsorbed by the soil bacteria Bacillus of growth in JS-BC device on carrier, initial breakdown organism wherein and ammonia nitrogen, 6th step: the water outlet in JS-BC device flows into aeration tank, gas blower is to aeration tank air feed, make to keep dissolved oxygen content in aeration tank, sewage is by soil bacteria Bacillus in aeration tank and peculiar microorganism, nitrifier, denitrifying bacteria, polyP bacteria, protozoon, metazoan synergy, organism remaining in sewage, ammonia nitrogen and phosphorus are removed effectively, the pump of aeration tank effluent recycling is arranged on aeration tank end, is back to mixing distribution reservoir, PAC chemical auxiliary dephosphorization is added in aeration tank, 7th step: the water outlet in aeration tank flows into second pond, and muddy water is separated in second pond, second pond mud is back in mixing distribution reservoir through sludge reflux pump, and second pond residual sludge pump is to sludge treating system process, 8th step: secondary clarifier effluent is discharged through water outlet scale tank after flowing into sterilisation system.

Embodiment 2: a kind of BC new urban sewage treatment process, it is made up of following steps, the first step: sanitary sewage enters through city planting ductwork the pollution substance that large volume removed by coarse rack well, and coarse rack mesh is 65mm, second step: the water outlet of coarse rack well flows into sewage lifting pump sump, then is promoted to fine fack well from sewage lifting pump sump through lift pump, and fine fack will tackle impurities in water and large particulate matter, and fine fack mesh is 17mm, 3rd step: the water outlet of fine fack well flows into settling pit, and the precipitate in water is got off by settling pit, 4th step: settling pit water outlet flows into mixing distribution reservoir, in mixing distribution reservoir, second pond returned sluge, aeration tank backflow sewage and Yuan Shui mix, and its blending ratio is 1:1:2, 5th step: add nutritive medium in the water outlet in mixing distribution reservoir, nutritive medium is 1:0.00004 ~ 1:0.00008 with mixing distribution reservoir inner volume ratio, nutritive medium is mainly tropical fresh fruit, edible ethanol and pure mountain spring water composition, adding nutritive medium sewage flows in JS-BC device, JS-BC device comprises biological reaction tank, netted rotary flora contact device, attached microbial film on contact, by gas blower air feed in JS-BC device, sewage is adsorbed by the soil bacteria Bacillus of growth in JS-BC device on carrier, initial breakdown organism wherein and ammonia nitrogen, 6th step: the water outlet in JS-BC device flows into aeration tank, gas blower is to aeration tank air feed, make to keep dissolved oxygen content in aeration tank, sewage is by soil bacteria Bacillus in aeration tank and peculiar microorganism, nitrifier, denitrifying bacteria, polyP bacteria, protozoon, metazoan synergy, organism remaining in sewage, ammonia nitrogen and phosphorus are removed effectively, the pump of aeration tank effluent recycling is arranged on aeration tank end, is back to mixing distribution reservoir, PAC chemical auxiliary dephosphorization is added in aeration tank, 7th step: the water outlet in aeration tank flows into second pond, and muddy water is separated in second pond, second pond mud is back in mixing distribution reservoir through sludge reflux pump, and second pond residual sludge pump is to sludge treating system process, 8th step: secondary clarifier effluent is discharged through water outlet scale tank after flowing into sterilisation system.

Embodiment 3: a kind of BC new urban sewage treatment process, it is made up of following steps, the first step: sanitary sewage enters through city planting ductwork the pollution substance that large volume removed by coarse rack well, and coarse rack mesh is 100mm, second step: the water outlet of coarse rack well flows into sewage lifting pump sump, then is promoted to fine fack well from sewage lifting pump sump through lift pump, and fine fack will tackle impurities in water and large particulate matter, and fine fack mesh is 25mm, 3rd step: the water outlet of fine fack well flows into settling pit, and the precipitate in water is got off by settling pit, 4th step: settling pit water outlet flows into mixing distribution reservoir, in mixing distribution reservoir, second pond returned sluge, aeration tank backflow sewage and Yuan Shui mix, and its blending ratio is 1:1:2, 5th step: add nutritive medium in the water outlet in mixing distribution reservoir, nutritive medium is 1:0.00000004 ~ 1:0.00000008 with water inlet volume ratio, nutritive medium is mainly tropical fresh fruit, edible ethanol and pure mountain spring water composition, adding nutritive medium sewage flows in JS-BC device, JS-BC device comprises biological reaction tank, netted rotary flora contact device, attached microbial film on contact, by gas blower air feed in JS-BC device, sewage is adsorbed by the soil bacteria Bacillus of growth in JS-BC device on carrier, initial breakdown organism wherein and ammonia nitrogen, 6th step: the water outlet in JS-BC device flows into aeration tank, gas blower is to aeration tank air feed, make to keep dissolved oxygen content in aeration tank, sewage is by soil bacteria Bacillus in aeration tank and peculiar microorganism, nitrifier, denitrifying bacteria, polyP bacteria, protozoon, metazoan synergy, organism remaining in sewage, ammonia nitrogen and phosphorus are removed effectively, the pump of aeration tank effluent recycling is arranged on aeration tank end, is back to mixing distribution reservoir, PAC chemical auxiliary dephosphorization is added in aeration tank, 7th step: the water outlet in aeration tank flows into second pond, and muddy water is separated in second pond, second pond mud is back in mixing distribution reservoir through sludge reflux pump, and second pond residual sludge pump is to sludge treating system process, 8th step: secondary clarifier effluent is discharged through water outlet scale tank after flowing into sterilisation system.

Claims (1)

1. a BC new urban sewage treatment process, is characterized in that: be made up of following steps, the first step: sanitary sewage enters through city planting ductwork the pollution substance that large volume removed by coarse rack well, and coarse rack mesh is 25 ~ 100mm, second step: the water outlet of coarse rack well flows into sewage lifting pump sump, then is promoted to fine fack well from sewage lifting pump sump through lift pump, and fine fack will tackle impurities in water and large particulate matter, and fine fack mesh is 1.5 ~ 25mm, 3rd step: the water outlet of fine fack well flows into settling pit, and the precipitate in water is got off by settling pit, 4th step: settling pit water outlet flows into mixing distribution reservoir, in mixing distribution reservoir, second pond returned sluge, aeration tank backflow sewage and Yuan Shui mix, and its blending ratio is 1:1:2, 5th step: add nutritive medium in the water outlet in mixing distribution reservoir, nutritive medium is 1:0.00000004 ~ 1:0.00000008 with water inlet volume ratio, nutritive medium is mainly tropical fresh fruit, edible ethanol and pure mountain spring water composition, adding nutritive medium sewage flows in JS-BC device, JS-BC device comprises biological reaction tank, netted rotary flora contact device, attached microbial film on contact, by gas blower air feed in JS-BC device, sewage is adsorbed by the soil bacteria Bacillus of growth in JS-BC device on carrier, initial breakdown organism wherein and ammonia nitrogen, 6th step: the water outlet in JS-BC device flows into aeration tank, gas blower is to aeration tank air feed, make to keep dissolved oxygen content in aeration tank, sewage is by soil bacteria Bacillus in aeration tank and different oxygen animalcule, nitrifier, denitrifying bacteria, polyP bacteria, protozoon, metazoan synergy, organism remaining in sewage, ammonia nitrogen and phosphorus are removed effectively, the pump of aeration tank effluent recycling is arranged on aeration tank end, is back to mixing distribution reservoir, PAC chemical auxiliary dephosphorization is added in aeration tank, 7th step: the water outlet in aeration tank flows into second pond, and muddy water is separated in second pond, second pond mud is back in mixing distribution reservoir through sludge reflux pump, and second pond residual sludge pump is to sludge treating system process, 8th step: secondary clarifier effluent is discharged through water outlet scale tank after flowing into sterilisation system.
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CN104556557B (en) * 2014-12-05 2017-05-03 安徽华盛科技控股股份有限公司 CIT municipal domestic sewage treatment system
CN105084654A (en) * 2015-08-07 2015-11-25 柴建中 Sewage deodorization method
CN105060635B (en) * 2015-08-07 2017-12-19 青海洁神环境能源产业有限公司 A kind of method of BBR municipal sewages low-temperature denitrification processing
CN105130110B (en) * 2015-08-24 2017-04-19 张芳 Sewage treatment process used advanced nitrogen and phosphorus removal system by utilizing sludge adsorptive separation
CN105152480B (en) * 2015-09-14 2018-08-14 青海洁神环境能源产业有限公司 A kind of method of municipal sewage treatment
CN105084678B (en) * 2015-09-14 2018-08-10 青海洁神环境能源产业有限公司 A kind of method of improved municipal sewage treatment
CN105130126A (en) * 2015-09-14 2015-12-09 柴建中 New method of urban sewage treatment
CN105174655A (en) * 2015-10-20 2015-12-23 柴建中 Treatment method of low-C/N ratio urban sewage
CN105174438B (en) * 2015-10-20 2018-08-10 青海洁神环境能源产业有限公司 A kind of method of improved MBR municipal sewage treatments
CN105621801A (en) * 2016-01-18 2016-06-01 江阴市弘诺机械设备制造有限公司 Biological reaction sewage treatment method
CN107417045A (en) * 2017-08-23 2017-12-01 北京交通大学 A kind of low carbon/nitrogen ratio wastewater efficient denitrification dephosphorization system and method
CN107746151A (en) * 2017-10-27 2018-03-02 安徽中韩净化设备有限公司 A kind of town domestic sewage purification process technique

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