CN101481194A - Town domestic sewage treatment process - Google Patents
Town domestic sewage treatment process Download PDFInfo
- Publication number
- CN101481194A CN101481194A CNA2008101308993A CN200810130899A CN101481194A CN 101481194 A CN101481194 A CN 101481194A CN A2008101308993 A CNA2008101308993 A CN A2008101308993A CN 200810130899 A CN200810130899 A CN 200810130899A CN 101481194 A CN101481194 A CN 101481194A
- Authority
- CN
- China
- Prior art keywords
- sewage
- pond
- sludge
- treatment process
- anaerobic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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- 239000010865 sewage Substances 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims description 21
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 15
- 241000251468 Actinopterygii Species 0.000 claims abstract description 13
- 230000029087 digestion Effects 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims abstract description 7
- 238000000926 separation method Methods 0.000 claims abstract description 7
- 239000000126 substance Substances 0.000 claims abstract description 4
- 239000010802 sludge Substances 0.000 claims description 33
- 239000002351 wastewater Substances 0.000 claims description 21
- 238000001035 drying Methods 0.000 claims description 15
- 238000004062 sedimentation Methods 0.000 claims description 13
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- 239000000446 fuel Substances 0.000 claims description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N phosphorus Chemical compound 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[P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 3
- 239000011574 phosphorus Substances 0.000 claims description 3
- 238000000247 postprecipitation Methods 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 2
- 235000019688 fish Nutrition 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 5
- 241000276438 Gadus morhua Species 0.000 abstract description 4
- 235000019516 cod Nutrition 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract 1
- 235000013311 vegetables Nutrition 0.000 description 5
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- 238000000855 fermentation Methods 0.000 description 3
- 230000004151 fermentation Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 244000052616 bacterial pathogens Species 0.000 description 2
- 230000031018 biological processes and functions Effects 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000000050 nutritive Effects 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- 241000565118 Cordylophora caspia Species 0.000 description 1
- 241000238557 Decapoda Species 0.000 description 1
- 206010061529 Polyp Diseases 0.000 description 1
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- 238000011109 contamination Methods 0.000 description 1
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- 229910052757 nitrogen Inorganic materials 0.000 description 1
- -1 nitrogen phosphorus Chemical compound 0.000 description 1
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Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Abstract
The invention discloses a technology for processing market town living sewage, which comprises the steps of sewage collection, solid-liquid separation, anaerobic digestion, heavy metal removal, anaerobic active mud processing, stepped manual marsh establishment, fish pond and paddy field ecological system establishment and the like. The technology for processing market town living sewage can effectively remove organic substances and heavy metal, such as COD, BOD and the like in the sewage so that the sewage reaches the standard of sewage discharge. The invention has obvious dirt removal effect, energy consumption saving, low investment, low running expense, convenient and reliable running, wide using range and small occupied area and is widely used for the ecological processing and the integrated circulation use of market town living sewage.
Description
Technical field
The present invention relates to a kind of sewage treatment process, particularly relate to a kind of town domestic sewage ecological circulation treatment process.
Background technology
Along with improving constantly of China's level of urbanization, national samll cities and towns have reached nearly 50,000, and the sanitary sewage of these samll cities and towns through just handling directly discharging, has not caused the severe contamination of water surrounding.Domestic processing at present to such waste water, the one, adopt biological process, promptly adopt aerobic, anaerobism, the oxygen treatment system of holding concurrently, though that this treatment system has a load of processing is high, the characteristics that processing power is strong, shortcoming are that one-time investment is big; The 2nd, adopt artificial wet land system, promptly be transformed into by waterplant formations such as rubble ickings bed, microorganism with the farmland of putting aside as useless or leave unused, depression, pool etc.Effluent stream through wetland filter, adsorb, biological action such as physical process such as displacement and microorganism absorption, degraded, with and reach the purpose that purifies water.This system has less investment, and working cost is low, the characteristics that maintenance technology is easy, but floor space is big, and winter operation is restricted.
Summary of the invention
It is good to the purpose of this invention is to provide a kind of clean effect, less investment, and operation is convenient, and floor space is little, the town domestic sewage ecological circulation treatment process that is not subject to seasonal restrictions, can fully utilizes.
Achieving the above object, the present invention has adopted following technical scheme:
1. sewage collecting
With the sewage collecting pipe network with sewage collecting after, at the tail end of its total sewage draining exit artificial screen cloth and mechanical grille are set, remove out thick group foreign material in the sewage;
2. solid-liquid separation
Sewage is flowed in the flat flow preliminary sedimentation tank, stop 4h, big suspended substance in the precipitation sewage is realized solid-liquid separation, regulates concentration;
3. anaerobic digestion
Sewage in the preliminary sedimentation tank is drained into the UASB anaerobic jar, waste water is after bottom perforated pipe water distribution system is distributed, waste water flows and the stirring action of a large amount of biogas of anaerobic process output so that certain flow rate is bottom-up, sewage and mud thorough mixing, organic matter is adsorbed decomposition, the residence time is 48h, the biogas that produces discharge via the collection chamber of UASB top triphase separator, collection acts as a fuel; The waste water that contains suspended sludge enters the negative area of triphase separator, and the good mud of sedimentation function is sent into the sludge drying pond through post precipitation, and the waste water that contains a small amount of light mud enters oxygen compatibility pool from reactor top, and excess sludge is sent into the sludge drying pond;
4. eliminate heavy metal
The water outlet of USAB is supported the pond from flowing to hold concurrently, and adds in the foster pond of holding concurrently and can adsorb heavy metal Cu
2+, Pb
2+, Zn
2+Yeast, circular flow 3～6 days can be removed the heavy metal in the water body effectively, and the excess sludge of collecting is made into the sludge drying pond;
5. handle anaerobic activated sludge
The mud that sewage treatment process is produced carries out processed with being pumped in the sludge drying bed, aerobic heap is carried out making fertilizer behind the anaerobically fermenting behind the sludge drying;
6. build the step artificial swamp
In the downstream of holding concurrently foster pond, make up artificial swamp by certain gradient, the structure of artificial swamp is divided into four layers from bottom to up, bottom is a concrete, two layers is the cobble of 20～30cm, three layers is the breeze of 60～100cm, and the top layer is the soil of 20～30cm, when the waste water of anaerobic digestion flows through artificial swamp, by falling the supplemental oxygen of exposing to the sun, the organism of remnants is decomposed under multiple action of microorganisms and is converted into inorganics, and then utilized by plant absorbing in the waste water, in the weighting material breeze, the poly-phosphorus bacteria of inoculation, aerobic nitrification and denitrifying bacterium are in weighting material, and just its surface is gone up and formed microbial film, and dwell time of sewage is 24h, effectively consume nutritive elements such as nitrogen phosphorus, reduce its concentration, water quality is purified, COD in the sewage
CrWith BOD
5Reduce 95%, residual quantity of heavy metal is few;
7. set up fish pond and paddy ecosystem
Build ecological fish pond and rice field in step artificial swamp downstream, the microorganism and the eutrophication factor in the current in flow through fish pond and rice field are significantly reduced, the water-quality guideline of final effusive waste water reaches emission standard.
Can in the UASB anaerobic digester, drop into by separating the degradation function bacterium that domestication obtains in active sludge and the Ruoergai soil, make the treatment effect of sanitary sewage more remarkable; The return of waste water of deviating from the described anaerobic activated sludge treating processes is gone into preliminary sedimentation tank, guarantees that all waste water can both be effectively handled.
The present invention makes full use of microorganism biological diversity feature, and anaerobism, hold concurrently oxygen system, artificial wet land system and ecospecies are cultured and organically combine, and forms unique sewage treatment process, and its characteristics are as follows:
(1) made full use of the natural drop in the Sichuan Basin, be unpowered mobile naturally on flow process, made up the town domestic sewage Combined Processing system of sanitary wastewater anaerobic treatment one hygrophyte+functional microorganism one humidogene vegetables+functional microorganism-ecological fish pond-paddy rice plantation;
(2) this technology working cost and one-time investment expense are lower than conventional waste water treatment process, and the system operational management is convenient, and be remarkable to N, P and organism and heavy metal removal effect, town domestic sewage through the UASB anaerobic digestion after, COD of sewage reduces 70%, BOD
5Reduce 80%, handle through the step artificial wet land system again, make COD of sewage and BOD
5Reduce 95%;
(3) at the high characteristics of town domestic sewage detergent concentration, add degradation function microbe groups and low temperature fermentation microbe groups in the UASB anaerobic digestion process, improve town domestic sewage processing efficiency and range of application;
(4) the efficient absorption of inoculation heavy metal Cu
2+, Pb
2+, Zn
2+Yeast, in oxygen compatibility pool, form microbial film, eliminate the potentially contaminated of heavy metal in the water body;
(5) after the aerobic quick fermentation of anaerobic activated sludge, reusable edible is as the farmland fertilizer;
(6) in suitable step artificial wet land system, hygrophyte/vegetables, polyP bacteria aerobic nitrification denitrifying bacterium have formed effective microorganism-plant combined reparation system, can reduce the eutrophication nutritive ingredient; Can plant some vegetables or ornamental plant in the artificial swamp, after water outlet reaches certain standard, enter ecological fish pond, be used to breed fish, support shrimp.
In sum, the present invention be remarkable, the energy-conservation province of a kind of scrubbing effect consumption, less investment, working cost low, can Ecological Disposal and the sewage treatment process of circulation comprehensive utilization, be widely used in the processing of town domestic sewage.
Description of drawings
Fig. 1 is a schematic flow sheet of the present invention.
Embodiment
Embodiment 1
Referring to Fig. 1, processing step of the present invention is as follows:
1. sewage collecting
With the sewage collecting pipe network with sewage collecting after, at the tail end of its total sewage draining exit artificial screen cloth and mechanical grille are set, remove out thick solid sundries in the sewage, frame trough adopts brick mix structure, the artificial screen cloth of built-in secondary 40 orders;
2. solid-liquid separation
Sewage is flowed in the flat flow preliminary sedimentation tank, stop 4h, big suspended substance in the precipitation sewage is realized solid-liquid separation, and preliminary sedimentation tank adopts brick mix structure;
3. anaerobic digestion
Sewage in the preliminary sedimentation tank is drained into the UASB anaerobic jar, waste water is after bottom perforated pipe water distribution system is distributed, waste water flows and the stirring action of a large amount of biogas of anaerobic process output so that certain flow rate is bottom-up, sewage and mud thorough mixing, organic matter is adsorbed decomposition, the residence time is 48h, the biogas that produces discharge via the collection chamber of UASB top triphase separator, collection acts as a fuel; The waste water that contains suspended sludge enters the negative area of triphase separator, the good mud of sedimentation function is through post precipitation, send into the sludge drying pond, the waste water that contains a small amount of light mud enters oxygen compatibility pool from reactor top, excess sludge is sent into the sludge drying pond, in the UASB anaerobic digester, drop into from active sludge and Ruoergai soil and separates the degradation function bacterium of taming, make wastewater treatment efficiency better;
4. eliminate heavy metal
The USAB water outlet is supported the pond from flowing to hold concurrently, and adds in the foster pond of holding concurrently and can adsorb heavy metal Cu
2+, Pb
2+, Zn
2+Yeast, circular flow 4 days can be removed the heavy metal in the water body effectively, and the excess sludge of collecting is sent into the sludge drying pond;
5. handle anaerobic activated sludge
The mud that sewage treatment process is produced carries out processed with being pumped in the sludge drying bed, and deviate from return of waste water and go into preliminary sedimentation tank, aerobic composting fermentation behind the sludge drying, and as the orchard, the biological organic fertilizer in vegetable field or farmland; Mummifying pool adopts width of cloth sedimentation tank, adopts brick mix structure;
6. build the step artificial swamp
In the downstream of holding concurrently foster pond, make up artificial swamp by certain gradient, the structure of artificial swamp is divided into four layers from bottom to up, bottom is a concrete, two layers is the cobble of 25cm, three layers is the breeze of 80cm, the top layer is the soil of 25cm, and in the weighting material breeze, the poly-phosphorus bacteria of inoculation, aerobic nitrification and denitrifying bacterium are in weighting material, just its surface is gone up and is formed microbial film, dwell time of sewage is 24h, in the step artificial swamp, falls the oxygenating artificial swamp that exposes to the sun and adopts brick mix structure, thereafter employing oxidation ditch forms, planted on two sides hygrophyte or vegetables.
7. set up fish pond and paddy ecosystem
Build ecological fish pond and rice field in step artificial swamp downstream, the microorganism and the eutrophication factor in the current in flow through fish pond and rice field significantly reduce, and the water-quality guideline of final effusive waste water reaches the one-level A standard among the GB18918-2002.
Claims (3)
1, a kind of town domestic sewage treatment process is characterized in that, its processing step is as follows:
1. sewage collecting
With the sewage collecting pipe network with sewage collecting after, at the tail end of its total sewage draining exit artificial screen cloth and mechanical grille are set, remove out thick solid sundries in the sewage;
2. solid-liquid separation
Sewage is flowed in the flat flow preliminary sedimentation tank, stop 4h, big suspended substance in the precipitation sewage is realized solid-liquid separation;
3. anaerobic digestion
Sewage in the preliminary sedimentation tank is drained into the USAB anaerobic jar, the residence time is 48h, the biogas that produces discharge via the collection chamber of UASB top triphase separator, collection acts as a fuel, the waste water that contains suspended sludge enters the negative area of triphase separator, and mud is sent into the sludge drying pond through post precipitation, the waste water that contains a small amount of light mud enters oxygen compatibility pool from reactor top, and excess sludge is sent into the sludge drying pond;
4. eliminate heavy metal
The water outlet of USAB is supported the pond from flowing to hold concurrently, and adds in the foster pond of holding concurrently and can adsorb heavy metal Cu
2+, Pb
2+, Zn
2+Yeast, circular flow 3～6 days can be removed the heavy metal in the water body effectively, and the excess sludge of collecting is sent into the sludge drying pond;
5. handle anaerobic activated sludge
The mud that sewage treatment process is produced carries out processed with being pumped in the sludge drying bed, aerobic heap is carried out making fertilizer behind the anaerobically fermenting behind the sludge drying;
6. build the step artificial swamp
In the downstream of holding concurrently foster pond, make up artificial swamp by certain gradient, the structure of artificial swamp is divided into four layers from bottom to up, and bottom is a concrete, and two layers is the cobble of 20～30cm, three layers is the breeze of 60～100cm, the top layer is the soil of 20～30cm, and in the weighting material breeze, the poly-phosphorus bacteria of inoculation, aerobic nitrification and denitrifying bacterium are in weighting material, its surface is gone up form microbial film, dwell time of sewage is 24h;
7. set up fish pond and paddy ecosystem
Build ecological fish pond and rice field in step artificial swamp downstream, the microorganism and the eutrophication factor in the current in flow through fish pond and rice field are significantly reduced, the water-quality guideline of final effusive waste water reaches emission standard.
2, town domestic sewage treatment process according to claim 1 is characterized in that: drop in the UASB anaerobic digester by the degradation function bacterium that separates the domestication acquisition in active sludge and the Ruoergai soil.
3, town domestic sewage treatment process according to claim 1 is characterized in that: the return of waste water of deviating from the described anaerobic activated sludge treating processes is gone into preliminary sedimentation tank.
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| CN200810044332.4 | 2008-04-26 | ||
| CN200810044332 | 2008-04-26 | ||
| CN2008101308993A CN101481194B (en) | 2008-04-26 | 2008-08-15 | town domestic sewage treatment process |
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|---|---|---|---|
| CN2008101308993A CN101481194B (en) | 2008-04-26 | 2008-08-15 | town domestic sewage treatment process |
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