CN105016579A - Rural sewage treatment system - Google Patents

Abstract

The invention discloses a rural sewage treatment device and a method for treating rural sewage; the device includes a sedimentation tank, two anaerobic tanks, an activated carbon adsorption tank, a stabilization pond and an ecological pond; the sedimentation tank is connected with the two anaerobic tanks, the two anaerobic tanks are connected with the activated carbon adsorption tank, the activated carbon adsorption tank is connected to the stabilization pond, and the stabilization pond is connected with the ecological pond. A whole set of sewage treatment process scheme and device provided by the invention have the advantages of low investment, low operating cost, high treatment efficiency, and economic environmental protection, and are used for treating wastewater and sewage generated in rural daily life to meet the national standard for irrigating farmlands.

Description

A kind of rural sewage treatment system

Technical field

The present invention relates to a kind of Sewage treatment systems, be specifically related to a kind of rural sewage treatment system.

Background technology

Along with the development of new rural village, village wastewater discharge increases day by day, and the negative impact produced agroecological environment and water body environment is also day by day serious.New rural village sewage pollution load is high, and farmer's income level is lower relative to cities and towns, and cause current new rural village Pollution abatement measure to be difficult to advance, even waste water does not process the phenomenon of directly discharge very generally, causes great pollution and harm to social environment.

Propose in prior art, develop new rural village waste water control and utilize complete set technology, greatly can improve the efficiency of the existing sanitary sewage disposal technology of current China, greatly alleviate new rural village and concentrate sewage for the pressure of agroecological environment.But rural sewage treatment existence lacks of capital, the problems such as resident family's dispersion, sewage treatment project is great, if registered one's residence according to urban pipe network, sewage disposal one-level A standard, sewage disposal one-time investment will up to 10,000 ground per capita, and year handling unit up to a hundred per capita.

The technique that current new rural village sewage disposal is commonly used is---aerobic---oxidation of anaerobism, all adopts skeleton construction and a series of mechanical means accelerating natural response time, and investment is large, and working cost is high.In addition, although the treatment effect that the dispensing coagulation of current use, anaerobic contact process, aerobic contact process, anaerobic filter, mud bed bioreactor, up-flow anaerobic sludge blanket, composite anaerobic Sludge Bed and anaerobic pond etc. have had, but construction cost and running cost high and cannot bear, particularly use galvanic process construction cost and working cost very high, thus must seek new not only simple and easy but also reliable and stable method, namely urgently develop a kind of economical and practical Sewage treatment systems for rural area.

Summary of the invention

The object of the invention is to the shortcoming overcoming above-mentioned prior art, there is provided that a whole set of investment is low, working cost is low, processing efficiency is high, the sewage treatment process scheme of economic environmental protection and equipment, be used for processing the stain disease produced in the daily life of rural area, be up to state standards irrigated farmland.The pollutant catabolic gene measure that this programme provides, accurate theory can as a kind of pilot, a kind of trial, a target, it have combine indigenous and foreign methods, invest little, instant effect, scalable, the advantage such as can to transform, make full use of rural area favorable terrain landforms, progressively improve that new rural village is dirty, unrest, difference situation, reach resource, the energy, harmonious development.

The present invention adopts following technical scheme:

A kind of countryside sewage treatment equipment, it comprises a settling tank, two anaerobic ponds, an activated carbon adsorption tank, a stabilization pond and ecological ponds, described settling tank is connected with two anaerobic ponds respectively, two anaerobic ponds are connected with described activated carbon adsorption tank, described activated carbon adsorption tank is connected with described stabilization pond, and described stabilization pond is connected with described ecological pond.

According to the present invention, one of them anaerobic pond is positioned at the top of described settling tank, and another anaerobic pond is positioned at right side or the left side of described settling tank.

According to the present invention, described in described activated carbon adsorption tank is positioned at, be positioned at the top of the right side of described settling tank or the anaerobic pond in left side.

According to the present invention, described sewage is collected after mouth carries out solid-liquid separation through a pipe network and is entered described settling tank again.Described pipe network can be steel rake, grid or some simple collection devices.

According to the present invention, gac in described activated carbon adsorption tank is through activation treatment.The shape of the micropore of described gac has round shape, taper shape, doleiform, and plate shaped, V-shape, capillary are tubular etc.

According to the present invention, described stabilization pond is made up of the Aerobic Pond be linked in sequence and oxidation pond.Wherein, described Aerobic Pond adopts activated sludge process to make the degradeds further such as CODcr.Described oxidation pond is circulation ditch formula oxidation pond, and sewage is in this nitrated denitrogenation.

According to the present invention, described stabilization pond is made up of the Aerobic Pond be linked in sequence, oxidation pond and the precipitation pool.Wherein, described Aerobic Pond adopts activated sludge process to make the degradeds further such as CODcr.Described oxidation pond is circulation ditch formula oxidation pond, and sewage is in this nitrated denitrogenation.Microalgae in described oxidation pond water is easy to precipitation, and the algae of about 50%-80% can be natural removal in the described precipitation pool of 1-2d at hydraulic detention time.

According to the present invention, described ecological pond comprises waste water soil treatment system, sewerage ecological pool treatment system and the earthworm microorganism filter tank system that order is connected.

According to the present invention, described waste water soil treatment system is a kind of ecological engineering technology of sewage disposal, its principle is by soil such as farmland, forest land, reed beds--the biology, chemistry, physics etc. of botanical system are fixing and degrade, and realize purification and be used to sewage and the resource such as nitrogen, phosphorus to the pollutent in sewage.According to the difference of processing target, handling object, waste water soil treatment system is divided into slow rate (SR), diafiltration (RI) fast, overland flow (OF), wetland variation (WL) and subsurface infiltration (UG) five kinds of main technique types.

According to the present invention, described waste water soil treatment system is artificial wet land treating system.

According to the present invention, described sewerage ecological pool treatment system take sun power as Initial energy source, by planting aquatic crops in the pool, carry out aquatic products and aquatic bird cultivation, set up artificial ecosystem, by natural biochemical self-purification, complete the biological treatment of sewage under field conditions (factors).

According to the present invention, described earthworm microorganism filter tank system is made up of filter bed filler, earthworm and water distribution system etc.

The present invention also provides following technical scheme:

A kind of sewage water treatment method adopting above-mentioned countryside sewage treatment equipment, described sewage is introduced into described settling tank, and then shunting enters described two anaerobic ponds, then interflow enters described activated carbon adsorption tank, enter described ecological pond through described stabilization pond again, then may be used for irrigated farmland.

The present invention has the following advantages:

Pay attention to having important practical significance with the sewage discharge collection and treatment facility building-up work of strengthening Rural areas.

Sewage treatment systems of the present invention purifies sewage disposal and the microenvironment restoration of the ecosystem of village, rural area, eco-embankment, organic combination has been carried out in field irrigation reuse and landscape water demand etc., each single technology stronger for the specific aim researched and developed at demonstration area complex condition, be optimized combination and systematize according to different physical condition, formed and be applicable to " biological+ecological " process of river network domestic sewage in rural areas and initial stage rainwash and the integrated system of comprehensive utilization technique.In addition, consider from the angle of Sustainable development, cleaner production and energy-saving and emission-reduction, solve country sewage pollution problem and also must strengthen environmental protection propaganda strength, improve peasant's Environmental awareness; Reduce sewage generation from source, countryside sewage treating is combined with wastewater reuse, sewage recycling technology, strengthen Ecological Environment construction, improve mode of agriculture, Rural Water ecotope is improved.

Sewage treatment systems of the present invention has the plurality of advantages such as a whole set of investment is low, working cost is low, processing efficiency is high, economic environmental protection.

The pollutant catabolic gene measure that this aspect provides, accurate theory can as a kind of pilot, a kind of trial, a target, it have combine indigenous and foreign methods, invest little, instant effect, scalable, the advantage such as can to transform, make full use of rural area favorable terrain landforms, progressively improve that new rural village is dirty, unrest, difference situation, reach resource, the energy, harmonious development.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of waste disposal plant of the present invention.Wherein, 1. settling tank 2. 3. anaerobic pond 4. activated carbon adsorption tank 5. stabilization pond 6. ecological pond.

Embodiment

Country sewage pollution is the main manifestations of rural environmental pollution, and the potential potential safety hazard at water source, rural area is not only in the environmental pollution that country sewage causes, and also can aggravate the crisis of Freshwater resources, arable land is irrigated and can not get effective guarantee, the survival and development of harm peasant.Pay attention to and sewage discharge collection and the treatment facility building-up work of strengthening Rural areas, avoid producing pollution effect because of the unprocessed direct discharge of sewage to the physical environment such as water body, soil of Rural areas, guarantee rural area the safety of water source and peasant healthy, be strengthen infrastructure in new countryside construction, advance an important content of Village Redevelopment work, also be simultaneously to be solvedly in the human settlement's improvement work of Rural Areas at Present to be badly in need of most, the most urgently, most distinct issues, have important practical significance.

The principal feature of country sewage comprises: (1) country sewage is mainly sanitary sewage and take agricultural-food as the mixture of processing sewage of raw material, be substantially free of heavy metal and hazardous and noxious substances, containing a certain amount of nitrogen and phosphorus, biodegradability is good, but water quality and quantity changes greatly; (2) Rural areas inhabitants live dispersion, major part does not have network of drains, and sewage centralized collection intractability is larger.

Technical scheme of the present invention is when selecting treatment process, take into full account that new rural village sewage pollution load is high, and the feature that farmer's income level is lower relative to cities and towns, select the process program that sewage treatment project investment is low, working cost is low, processing efficiency is high, specifically formulate a whole set of above-mentioned economy, the sewage treatment process scheme of environmental protection and equipment, be used for processing the stain disease produced in the daily life of rural area, can be up to state standards irrigated farmland.

As previously mentioned, there is many deficiencies in existing technique; Therefore, we are in conjunction with domestic and international successful experience, select novel separation, precipitation, anaerobism, charcoal absorption, built-up type pond treatment technique, make full use of the terrain of new rural village, properly solve high two hang-ups lower relative to cities and towns with farmer's income level of new rural village sewage pollution load.This technique is transplanted to facultative lagoon up-flow anaerobic sludge blanket effectively, and it has, and reduced investment, running cost are low, the callable feature of convenient operation and management, the energy.

Fig. 1 is the schematic diagram for waste disposal plant of the present invention, sanitary sewage is after pipe network collection mouth carries out solid-liquid separation, first 1. number settling tank is entered, then enter 2. 3. anaerobic pond from a 1. number shunting and carry out anaerobic treatment, interflow enters 4. number activated carbon adsorption tank again, finally discharges from 5. stabilization pond and enters ecological pond then irrigated farmland.

Below technical scheme of the present invention is elaborated.

1, solid-liquid separation (settling tank)

Urban residents' sanitary sewage is being arranged into before collecting conduit, and (one is the effect reaching preliminary solid-liquid separation to the artificial solid using steel rake, grid or some easy collection devices to collect in sewage; Two is for the operation for the treatment of pond internal security cleaning provides leading favourable condition) deliver to settling tank through waterpower separating screen through collecting conduit, solid is separated.Sewage enters anaerobic treatment unit after described settling tank.In addition, regularly recovery precipitated solid is drawn clearly.

2, anaerobic treatment (anaerobic pond)

In general, in waste water, complicated organism material ratio is more, divides four-stage to be degraded by anaerobic digestion:

(1) hydrolysis stage: macromolecule organic, due to its macromole volume, can not, directly by the cell walls of anerobe, need to be resolved into small molecules by extracellular enzyme outside microbe.In waste water, typical organic substance such as Mierocrystalline cellulose is resolved into cellobiose and glucose by cellulase, and starch is broken down into maltose and glucose, and protein is broken down into small peptide and amino acid.Next step decomposition is carried out in the body that these small molecules after decomposition can enter into cell by cell walls.

(2) souring stage: above-mentioned small organic molecule enters in cell paste and changes into more simple compound and be assigned to extracellular, the primary product of this one-phase is voltaile fatty acid (VFA), also has the product such as alcohols, lactic acid, carbonic acid gas, hydrogen, ammonia, hydrogen sulfide of part to produce simultaneously.

(3) the acetic acid stage is produced: in this stage, the product of previous step is converted to acetic acid, carbonic acid, hydrogen and new cellular material further.

(4) in the methane phase stage: at this one-phase, acetic acid, hydrogen, carbonic acid, formic acid and methyl alcohol are all converted to methane, carbonic acid gas and new cellular material.This one-phase is also the rate-limiting step of whole anaerobic process of paramount importance stage and whole anaerobic reaction process.

Drawn by the study mechanism of disposing of sewage to anaerobion, anaerobism Treating Municipal Sewage under normal temperature state is possible, we miss due to the reason of all reactions abiotic itself chance utilizing anaerobic treatment municipal effluent in practice, and there is the situation of successful anaerobic treatment municipal effluent abroad, water outlet COD<40mg/l.Can meet organic emission standard completely, if add that brief denitration aeration system is (after eliminating BOD, only need the time of 1.5H just can carry out the conversion of NH3-N to NO-N), be exactly a low concentration wastewater treatment process being applicable to very much China's actual conditions.

Specifically as shown in Figure 1, described Sewage treatment systems comprises two anaerobic ponds, lays respectively at top and the right side of described settling tank, is connected respectively with described settling tank.

3, charcoal absorption (activated carbon adsorption tank)

It is relevant that strong absorption property and it of gac have huge specific surface area, and in carbon granule reactivation process, the space generated between lattice defines the pore of different shape and size, and the total area of its hole wall is exactly the total surface area of gac.Adsorption mainly occurs on the surface of these pores, and the total surface area that every gram of sorbent material has is called specific surface area.But the adsorptive capacity of gac is except relevant with specific surface area, and also relevant with the chemical property on distribution and surface with the shape of pore, the specific surface area of gac can reach 500 ~ 1700m ²/ g, the shape of activated carbon capillary depends on activation method and activation condition, has round shape, taper shape, doleiform, and plate shaped, V-shape, capillary are tubular etc.

Adopt gac to the advanced treatment of waste water, can improve and water quality.This is the adsorption due to gac, has adsorbed useless water-soluble organism.Easy realization synchronously digests denitrification, and this is due to gac can form one deck microbial film, there is aerobic-anaerobic district in the microbial film formed.Gac can reduce the effect of biological treatment, and it can adsorb some heavy metal ion will poisoned microorganism.It can improve the settleability of mud, is the adsorptivity due to it, and the small organic molecule of a lot of good stability is formed large flco by absorption.On the other hand, if the microbial film on gac is once be formed, just has and well go BOD ability.

Concrete described activated carbon adsorption tank is positioned at the right side of an anaerobic pond, the top of another anaerobic pond as shown in Figure 1, and realization is connected respectively with two anaerobic ponds.

4, stabilization pond

Aerobic Pond, high loading oxidation pond composition secondary aerobic treatment system, the former have employed activated sludge process, makes the degradeds further such as CODcr, and provides condition for the subsequent oxidation pool processes; The latter adopts circulation ditch formula oxidation pond, and sewage is in this nitrated denitrogenation.In high loading oxidation pond, water circulates in gallery, and owing to having certain flow velocity (10-15cm/s), air reaeration speed increases, simultaneously algae ramp.Algae photosynthesis provides dissolved oxygen supply aerobic microbiological to carry out Metabolic activity.Microalgae in high loading oxidation pond water is easy to precipitation, and the algae of about 50%-80% can be natural removal in the precipitation pool of 1-2d at hydraulic detention time.The algae respiratory rate of precipitation is very low, and can be concentrated in even several years and not obvious releasing nutrients thing of the sugared truth of a matter moon.In high loading oxidation pond, another remarkable effect of algae is the pH value that improve waste water in the pool, to sterilizing with impel nitrogen to spread in air to provide condition.100% can kill intestinal bacteria and most pathogenic agent when pH value is 9.2 in 24h, by day in high loading oxidation pond the pH value of waste water reach 9.5 not rarely seen.Whole system is stable, efficient.

5, ecological pond

Ecological pond is combined with utilization at sewage disposal, realizes a kind of biological wastewater treatment facility of sewage recycling, the plurality of advantages such as initial cost is economized, annual operating cost is low, management maintenance is convenient, stable and reliable operation that it has.In ecological pond treatment system, both can culturing fish and shrimp, aquatic bird etc., the waterplant such as lotus root, reed can be planted again, form the complicated ecosystem, water simultaneously after process can irrigated farmland, improvement soil, or some process water is back to after processing further, there is good environmental benefit and economic benefit.And effectively can absorb organism in sewage and the harmful material of part by the self-decontamination effect improving of occurring in nature.

Below the gac in described activated carbon adsorption tank is described further.

1, the technical superiority of gac in water treatment

(1) stable, treatment effect is good;

(2) improve the resistance of microorganism to organism and heavy metal; Gac energy adsorption surface active substance, solves the air bubble problem in aeration tank; Create charcoal body and the microorganism of cohesive force, define solid and dense mud, improve the operational condition of activated sludge process;

(3) can for the treatment of complicated component, concentration and the changeable waste water of the water yield;

(4) cost is low.Gac and film coupling method utilize the inrichment of Active Carbon in Organic and the Selective adsorption to oxygen in water, under the condition that temperature and nutrition are suitable for, make activated carbon surface grows aerobic microbiological, the decomposition oxygenizement of the adsorption of gac and microorganism is worked in coordination with.Adopt this method, not only can improve the treatment effect of waste water, and can work-ing life of prolongation gac by a relatively large margin, can also processing cost be reduced simultaneously, simplify running operation management.This is the sewage disposal technology that a kind of newly-developed gets up.

Below described ecological pond is described in further details.

Main ecological pond engineering sewage disposal technology comprises: the design of waste water soil treatment system, sewerage ecological pool treatment system, earthworm microorganism filter tank system and ecological pond

1, waste water soil treatment system

Waste water soil treatment system is a kind of ecological engineering technology of sewage disposal, its principle is by soil such as farmland, forest land, reed beds--the biology, chemistry, physics etc. of botanical system are fixing and degrade, and realize purification and be used to sewage and the resource such as nitrogen, phosphorus to the pollutent in sewage.According to the difference of processing target, handling object, waste water soil treatment system is divided into slow rate (SR), diafiltration (RI) fast, overland flow (OF), wetland variation (WL) and subsurface infiltration (UG) five kinds of main technique types.

Land treatment system cost is low, and treatment effect is good, and its construction costs and working cost are only 10% ~ 50% of traditional technology.Wherein sewage wetland ecological treatment system is also known as artificial swamp, and research is the most deep, most widely used general at present.Carrying out water pollution control by artificial swamp ecological engineering not only can make the water in sewage be able to regeneration, and the nutrition such as the organism in sewage, N, P, K can also be made to be utilized.Whole system is natural style benign cycle, constitutes the land and water ecosystem with self-adaptation, self-purification capacity.This system management is simple, needs the participation of people after stable hardly, and material consumption, energy consumption are low, and efficiency is high.Plant population in the ecosystem does not need fertilizing and irrigating separately, also has the function of beautifying the environment concurrently, and this ecological purification method achieves water surrounding Sustainable development.

For artificial wet land treating system, the purification mechanism of ecological soil treatment system to sewage is as follows: the filler (medium) in system has huge specific surface area, easy formation microbial film, effluent stream is when particle surface, and pollution substance is wherein trapped by precipitation, filtration, adsorption.

2, sewerage ecological pool treatment system

The ecology pond systems take sun power as Initial energy source, by planting aquatic crops in the pool, carrying out aquatic products and aquatic bird cultivation, setting up artificial ecosystem, by natural biochemical self-purification, complete the biological treatment of sewage under field conditions (factors).Organic substance is degraded in ecological pond treatment system, and the nutrition discharged enters in complicated food chain, and aquatic crops, the aquatic products of generation can be gathered in the crops.Ecological pond treatment system can process sanitary sewage and some organic industrial sewages effectively, has good removal effect to organism and pathogenic agent, has that less investment, working cost are low, the simple advantage of operational management.

3, earthworm microorganism filter tank system

Earthworm and ecological filter is the artificial ecosystem set up in filter bed, is made up of filter bed filler, earthworm and water distribution system etc.System utilizes the synergy of earthworm and microorganism to process the various form pollution substances contained in sewage and transform.Earthworm can carry out absorption Sum decomposition to sewage and mud, and cleaning filter bed, prevents blocking.Earthworm ight soil can filtering pollutent, improves processing efficiency.The existence of earthworm can be used as poultry feed.Microbial film sludge microbe in sewage is finally effectively transformed growth into earthworm and movement thereof by food chain, and the decomposition that the body of earthworm and movement thereof can become his microorganism utilizes object, thus carries out the ecological circulation of a new round.

4, the design of ecological pond

Ecological pond is generally used for the advanced treatment of sewage, and water inlet Pollutant levels are low, are also referred to as depth Litang.In the pool can planting aquatic plants, breed fish, duck, goose etc., form the complicated ecosystem, to improve decontamination effect improving by food chain.General provision: influent quality requires: BOD5≤30mg/L; COD≤120mg/L; 30 ﹤ SS ﹤ 60mg/L.When ecological pond is used for breeding fish, influent quality is except BOD5, SS, and other index should with reference to the requirement of fisheries water water quality standard.Residue analysis should be made for marketable fish.Effluent quality, according to the water quality requirement of water outlet disposal or reuse, determines the design effluent quality of ecological pond.In the present invention, the water outlet of depth Litang requires to reach Ningxia Hui Autonomous Region's provincial standard " domestic sewage in rural areas emission standard " primary standard.Ecological pond can by series operation, and the efficiency removing bacterium is higher.

Below in conjunction with drawings and Examples, the present invention is described in further detail.

One, the emission standard of water quality, water

The scale of new rural village: population 1000-2000 people

Sewage quantity: 30-60m ³/ day

Design water quality and emission standard are in table 1

Table 1 farmland irrigation water water quality basic controlling project standard value

As shown in Figure 1, countryside sewage treatment equipment of the present invention is made up of settling tank, the first anaerobic pond, the second anaerobic pond, activated carbon adsorption tank, stabilization pond and ecological pond, wherein,

1, settling tank 1

Effect: solid-liquid fine separation

Structure formation: skeleton construction

Size: L × W × H=4 × 2.5 × 2

Hydraulic detention time: HRT=1h

Useful volume: Ve=20m ³

Available depth: H=4m

2, anaerobic pond 2

Effect: primary reaction

Structure formation: skeleton construction

Size: L × W × H=4 × 2.5 × 2 × 2

Hydraulic detention time: HRT=1h

Useful volume: Ve=40m ³

Available depth: H=4m

3, activated carbon adsorption tank 1

Effect: adsorbing contaminant

Structure formation: skeleton construction

Size: L × W × H=2 × 2.5 × 4

Hydraulic detention time: HRT=16h

Useful volume: Ve=20m ³

Available depth: H=4m

4, stabilization pond 1

Effect: precipitation is stable

Structure formation: skeleton construction

Size: L × W × H=2 × 2.5 × 4

Useful volume: Ve=20m ³

Described stabilization pond is made up of the Aerobic Pond be linked in sequence, oxidation pond and the precipitation pool.Wherein, described Aerobic Pond adopts activated sludge process to make the degradeds further such as CODcr.Described oxidation pond is circulation ditch formula oxidation pond, and sewage is in this nitrated denitrogenation.Microalgae in described oxidation pond water is easy to precipitation, and the algae of about 50%-80% can be natural removal in the described precipitation pool of 1-2d at hydraulic detention time.

Stabilization pond treatment technology advantage is: running maintenance expense is low, and system does not consume energy substantially; Can landform be made full use of, reduce investment outlay; Without the need to sludge treatment; Sewage recycling can be realized.In China, particularly in lack of water arid area, stabilization pond is the effective ways implementing sewage recycling utilization.

5, ecological pond 1 place

Effect: organism (set the floor space of ecological pond according to the aquifer yield of stabilization pond, reduce the use of floor space) more than ecological natural environmental system absorption of residual

Structure formation: ecological mire structure

Take up an area: 1-2 mu

Hydraulic detention time: HRT=15h

Useful volume: Ve=800m3

Available depth: H < 1m

Described ecological pond comprises waste water soil treatment system, sewerage ecological pool treatment system, the earthworm microorganism filter tank system that order is connected, wherein, described waste water soil treatment system is above-mentioned artificial wet land treating system, described sewerage ecological pool treatment system by Using High-Rate Algae Pond and optionally a high aquatic pond form, described earthworm and ecological filter is the artificial ecosystem set up in filter bed, is made up of filter bed filler, earthworm and water distribution system etc.

The more traditional stabilization pond tool of Using High-Rate Algae Pond is adopted to have the following advantages: the residence time is short, and floor space is little; Build easily, easy maintenance, initial cost is few, and working cost is low, BOD5, NH ₄ ⁺,-N, PO ₄ ^3-,-P, pathogenic agent removal efficiency be high.

According to the structure connecing high aquatic pond after Using High-Rate Algae Pond, then hydrobiont wherein not only can remove algae, and reduce the SS of water outlet, and can remove the nitrogen phosphorus in water further, the higher aquatic plants simultaneously gathered in can as excellent feed and fertilizer.

Protection scope of the present invention is not limited only to above-described embodiment.According to content disclosed by the invention, those skilled in the art will recognize that when the technical characteristic do not departed from given by technical solution of the present invention and scope, to the above embodiment make many changes and amendment all belong to protection scope of the present invention.

Claims (10)

1. a countryside sewage treatment equipment, it is characterized in that, described device comprises a settling tank, two anaerobic ponds, an activated carbon adsorption tank, a stabilization pond and ecological ponds, described settling tank is connected with two anaerobic ponds respectively, two anaerobic ponds are connected with described activated carbon adsorption tank, described activated carbon adsorption tank is connected with described stabilization pond, and described stabilization pond is connected with described ecological pond.

2. countryside sewage treatment equipment according to claim 1, is characterized in that, one of them anaerobic pond is positioned at the top of described settling tank, and another anaerobic pond is positioned at right side or the left side of described settling tank.

3. countryside sewage treatment equipment according to claim 2, is characterized in that, is positioned at the top of the right side of described settling tank or the anaerobic pond in left side described in described activated carbon adsorption tank is positioned at.

Preferably, described sewage is collected after mouth carries out solid-liquid separation through a pipe network and is entered described settling tank again.Described pipe network can be steel rake, grid or some simple collection devices.

Preferably, the gac in described activated carbon adsorption tank is through activation treatment.The shape of the micropore of described gac has round shape, taper shape, doleiform, and plate shaped, V-shape, capillary are tubular etc.

4. the countryside sewage treatment equipment according to any one of claim 1-3, is characterized in that, described stabilization pond is made up of the Aerobic Pond be linked in sequence and oxidation pond.Wherein, described Aerobic Pond adopts activated sludge process to make the degradeds further such as CODcr.Described oxidation pond is circulation ditch formula oxidation pond, and sewage is in this nitrated denitrogenation.

5. the countryside sewage treatment equipment according to any one of claim 1-3, is characterized in that, described stabilization pond is made up of the Aerobic Pond be linked in sequence, oxidation pond and the precipitation pool.Wherein, described Aerobic Pond adopts activated sludge process to make the degradeds further such as CODcr.Described oxidation pond is circulation ditch formula oxidation pond, and sewage is in this nitrated denitrogenation.Microalgae in described oxidation pond water is easy to precipitation, and the algae of about 50%-80% can be natural removal in the described precipitation pool of 1-2d at hydraulic detention time.

6. the countryside sewage treatment equipment according to any one of claim 1-5, is characterized in that, described ecological pond comprises waste water soil treatment system, sewerage ecological pool treatment system and the earthworm microorganism filter tank system that order is connected.

7. countryside sewage treatment equipment according to claim 6, it is characterized in that, described waste water soil treatment system is a kind of ecological engineering technology of sewage disposal, its principle is by soil such as farmland, forest land, reed beds--the biology, chemistry, physics etc. of botanical system are fixing and degrade, and realize purification and be used to sewage and the resource such as nitrogen, phosphorus to the pollutent in sewage.According to the difference of processing target, handling object, waste water soil treatment system is divided into slow rate (SR), diafiltration (RI) fast, overland flow (OF), wetland variation (WL) and subsurface infiltration (UG) five kinds of main technique types.

Preferably, described waste water soil treatment system is artificial wet land treating system.

8. countryside sewage treatment equipment according to claim 6, it is characterized in that, described sewerage ecological pool treatment system take sun power as Initial energy source, by planting aquatic crops in the pool, carry out aquatic products and aquatic bird cultivation, set up artificial ecosystem, by natural biochemical self-purification, complete the biological treatment of sewage under field conditions (factors).

9. countryside sewage treatment equipment according to claim 6, is characterized in that, described earthworm microorganism filter tank system is made up of filter bed filler, earthworm and water distribution system etc.

10. one kind adopts the sewage water treatment method of the countryside sewage treatment equipment described in any one of claim 1-9, described sewage is introduced into described settling tank, then shunting enters described two anaerobic ponds, interflow enters described activated carbon adsorption tank again, enter described ecological pond through described stabilization pond again, then may be used for irrigated farmland.