CN105036475A - Treatment method for livestock breeding sewage - Google Patents

Treatment method for livestock breeding sewage Download PDF

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Publication number
CN105036475A
CN105036475A CN201510472712.8A CN201510472712A CN105036475A CN 105036475 A CN105036475 A CN 105036475A CN 201510472712 A CN201510472712 A CN 201510472712A CN 105036475 A CN105036475 A CN 105036475A
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China
Prior art keywords
sewage
pond
livestock
recovering
nitrogen
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CN201510472712.8A
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Chinese (zh)
Inventor
祁芳
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枞阳县宇瑞环保科技有限公司
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Priority to CN201510472712.8A priority Critical patent/CN105036475A/en
Publication of CN105036475A publication Critical patent/CN105036475A/en

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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00Technologies for the production of fuel of non-fossil origin
    • Y02E50/30Fuel from waste, e.g. synthetic alcohol or diesel

Abstract

The invention discloses a treatment method for livestock breeding sewage. According to the technical scheme, a chemical method is used for removing nitrogen and phosphor, and performing anaerobic digestion, aerating, manual land wetting and macroporous resin adsorption. The chemical method and a manual land wetting method are combined to remove nitrogen in the sewage at a high rate and rapidly at a low cost, and because guanite is recovered, resources are saved, and sustainable development can be achieved. The nitrogen and phosphor are removed at the same time, and therefore the multi-purpose effect is achieved. Thalia dealbata and pennisetum purpureum are planted inside a manual land wetting pool, in this way, the nitrogen can be adsorbed, the environment can be beautified, and air can be purified. Acetic acid is used for adjusting the pH, in this way, the pH can be changed, and the amount of methane generated in the anaerobic treatment process can be increased. The generated methane can be used for cooking and lighting of farmers, and therefore a lot of coal, natural gas and electricity are saved. Suspended matter obtained through filtering can serve as crop fertilizer, and therefore the planting cost of the farmers is lowered; non-woven cloth serves as a biological film, in this way, the price is low, the service life is long, and the cost is greatly lowered.

Description

A kind of livestock and poultry cultivation sewage water treatment method
Technical field
The present invention relates to a kind of sewage water treatment method, particularly relate to a kind of livestock and poultry cultivation sewage water treatment method.
Background technology
According to pertinent literature; former State Environmental Protection Administration shows the whole nation 23 provinces (district), city's scale animal and poultry cultivation industry pollution situation sample survey; whole nation feces of livestock and poultry and sewage generation are more than 20,000,000,000 tons; be 2.4 times of industrial solid castoff generation, feces of livestock and poultry chemical oxygen demand (COD) (COD) is considerably beyond China's trade effluent and sanitary sewage COD quantity discharged sum.Pollution from livestock and poultry has become the third-largest source of pollution after industrial pollution, domestic pollution, becomes the one of the main reasons that China's agricultural aspect is polluted.The sewage of high density enters in rivers and lakes, causes the continuous deterioration of surface water quality and groundwater quality, directly endangers the healthy of people, also seriously constrains the development of cultivation industry.Livestock breeding wastewater process has caused the great attention of plant owner and relevant department at present, takes a series of prophylactico-therapeutic measures and selects economy, efficient treatment technology very urgent.Along with state sewage emission standard upgrades day by day, it is more outstanding how high-concentration culture waste water reaches effluent standard problem.
Feature that livestock breeding wastewater has typically " three high ", COD is up to 3000 ~ 12000mg/L, and ammonia nitrogen to exceed standard decades of times up to 800 ~ 2200mg/L, SS, and the fluctuation of waste water complicated, water quality and quantity is large.Being limited to aquaculture is small profits industries, and current treatment process only for the significantly reduction of COD, and can remain in very large Technological Economy difficulty ammonia nitrogen qualified discharge.Sewage water denitrification technology conventional is at present traditional biological denitrogenation, namely makes mineralized nitrogen be nitrogen by nitrification-denitrification process.Nitrification and denitrification is two processes mutually opposed, and nitration reaction, by the effect of nitrobacteria, will be carried out under aerobic environment; Anti-nitration reaction then by means of the effect of denitrifying bacteria, need carry out under anaerobic; And traditional biological denitrification process needs a large amount of organic carbon sources as electron donor, if C/N<2.5, do not have additional organic carbon source, denitrification just cannot effectively carry out, if and C/N<4, denitrification container volume will improve 1.5 ~ 1.7 times; Therefore, when processing this kind of ultralow C/N of breeding wastewater than high concentration nitrogen-containing waste water, traditional biological denitrification process shows great limitation.
Summary of the invention
The object of the invention is to solve the problem, providing a kind of livestock and poultry cultivation sewage water treatment method.
A kind of livestock and poultry cultivation sewage water treatment method, technical scheme comprises the following steps:
(1) sewage is concentrated in collecting tank, regulates pH to 6 ~ 8;
(2) by regulate after sewage discharge to methane-generating pit, carry out anaerobically fermenting;
(3) from methane-generating pit discharge effluent stream to filtering basin, impurity is filtered;
(4) effluent stream after filtering is to phosphorus pond for recovering, and in phosphorus pond for recovering, add magnesium hydroxide, the molar ratio making magnesium ion and nitrogen is 1:1, stirs;
(5) survey the pH of sewage, the pH value regulating sewage with sodium hydroxide is 9 ~ 10, after fully stirring, leaves standstill 3 ~ 4 hours;
(6) sewage enters aeration tank after phosphorus pond for recovering flows out, and regulates pH to 6.5 ~ 7.5, carries out aerobic treatment;
(7) effluent stream after aeration, through artificial swamp pond, plants power flower and napier grass again in pond, every square metre of plantation 8 ~ 10 strains;
(8) sewage flowed out from artificial swamp pond is discharged after macroporous resin adsorption.
Magnesium hydroxide and nitrogen and phosphorus reaction, pH value 9 ~ 10 times, generate phosphoric acid salt struvite (MgNH 4pO 4.6H 2o) crystal, directly can be used as fertilizer; Can recycle after Rhizome of Grass leaf Sweelflag and Herba Iridis japonicae absorb phosphorus; Two approach combine and phosphoric acid salt are farthest reclaimed.
The adjustment of described step 1) pH regulates with the acetic acid of 5mol/L or the sodium hydroxide of 5mol/L.
Described step 3) is filtered sewage, uses stainless 10 orders, 30 orders and 60 order filtering nets to filter respectively at the water-in of filtering basin, centre and water outlet, using after filter residue and drying is pulverized as Crop fertilizer.
Have a stainless steel screen frame with holes in the phosphorus pond for recovering of described step 4), be embedded in phosphorus pond for recovering, non-woven fabrics is layered on bottom and the surrounding of screen frame.
Be non-woven biological film in the aeration tank of described step 6), non-woven fabrics is industrial nonwoven cloth, and composition is terylene, and membrane flux is 10 ~ 12L/ (m 2h), the dissolved oxygen amount of aeration tank is 3mg/L.
Beneficial effect of the present invention is: livestock and poultry cultivation sewage water treatment method provided by the invention, combines with chemical method and artificial swamp method, removes the nitrogen in sewage, clearance is high, and speed is fast, and cost is low, struvite is reclaimed, economizes on resources, realize sustainable development view; Can also remove phosphorus while removal nitrogen, a labor to be obtained; Power flower and napier grass is planted again in artificial swamp pond, can not only absorbed nitrogen, can also beautify the environment, purify air; Use second acid for adjusting pH, can pH be changed, the acetic acid content in sewage can be increased again, the methane quantity produced in anaerobic treatment process can be increased; The biogas produced can be cooked for peasant household and throw light on, and has saved a large amount of coal, Sweet natural gas and electricity; The suspended substance filtered out as Crop fertilizer, can reduce the planting cost of peasant household; Using non-woven fabrics as microbial film, cheap, the life-span is grown, greatly reduce cost.
Embodiment
This specific embodiment is only explanation of the invention; it is not limitation of the present invention; those skilled in the art can make to the present embodiment the amendment not having creative contribution as required after reading this specification sheets, as long as but be all subject to the protection of patent law in right of the present invention.
Embodiment 1
A kind of livestock and poultry cultivation sewage water treatment method, technical scheme comprises the following steps:
(1) sewage is concentrated in collecting tank, regulates pH to 6 with the acetic acid of 5mol/L or the sodium hydroxide of 5mol/L;
(2) by regulate after sewage discharge to methane-generating pit, carry out anaerobically fermenting;
(3) from the effluent stream of methane-generating pit discharge to filtering basin, impurity is filtered, uses stainless 10 orders, 30 orders and 60 order filtering nets to filter respectively at the water-in of filtering basin, centre and water outlet, using after filter residue and drying pulverizing as Crop fertilizer;
(4) effluent stream after filtering is to phosphorus pond for recovering, and in phosphorus pond for recovering, add magnesium hydroxide, the molar ratio making magnesium ion and nitrogen is 1:1, stirs;
(5) survey the pH of sewage, the pH value regulating sewage with sodium hydroxide is 9, after fully stirring, leaves standstill 3 hours, obtains struvite crystals;
(6) sewage enters aeration tank after phosphorus pond for recovering flows out, and regulate pH to 6.5, carrying out aerobic treatment, is non-woven biological film in aeration tank, and non-woven fabrics is industrial nonwoven cloth, and composition is terylene, and membrane flux is 10L/ (m 2h), the dissolved oxygen amount of aeration tank is 3mg/L;
(7) effluent stream after aeration, through artificial swamp pond, plants power flower and napier grass again in pond, every square metre of plantation 8 strains;
(8) sewage flowed out from artificial swamp pond is discharged after macroporous resin adsorption.
Embodiment 2
A kind of livestock and poultry cultivation sewage water treatment method, technical scheme comprises the following steps:
(1) sewage is concentrated in collecting tank, regulates pH to 7 with the acetic acid of 5mol/L or the sodium hydroxide of 5mol/L;
(2) by regulate after sewage discharge to methane-generating pit, carry out anaerobically fermenting;
(3) from the effluent stream of methane-generating pit discharge to filtering basin, impurity is filtered, uses stainless 10 orders, 30 orders and 60 order filtering nets to filter respectively at the water-in of filtering basin, centre and water outlet, using after filter residue and drying pulverizing as Crop fertilizer;
(4) effluent stream after filtering is to phosphorus pond for recovering, and in phosphorus pond for recovering, add magnesium hydroxide, the molar ratio making magnesium ion and nitrogen is 1:1, stirs;
(5) survey the pH of sewage, the pH value regulating sewage with sodium hydroxide is 9.5, after fully stirring, leaves standstill 3.5 hours, obtains struvite crystals;
(6) sewage enters aeration tank after phosphorus pond for recovering flows out, and regulate pH to 7, carrying out aerobic treatment, is non-woven biological film in aeration tank, and non-woven fabrics is industrial nonwoven cloth, and composition is terylene, and membrane flux is 11L/ (m 2h), the dissolved oxygen amount of aeration tank is 3mg/L;
(7) effluent stream after aeration, through artificial swamp pond, plants power flower and napier grass again in pond, every square metre of plantation 9 strains;
(8) sewage flowed out from artificial swamp pond is discharged after macroporous resin adsorption.
Embodiment 3
A kind of livestock and poultry cultivation sewage water treatment method, technical scheme comprises the following steps:
(1) sewage is concentrated in collecting tank, regulates pH to 8 with the acetic acid of 5mol/L or the sodium hydroxide of 5mol/L;
(2) by regulate after sewage discharge to methane-generating pit, carry out anaerobically fermenting;
(3) from the effluent stream of methane-generating pit discharge to filtering basin, impurity is filtered, uses stainless 10 orders, 30 orders and 60 order filtering nets to filter respectively at the water-in of filtering basin, centre and water outlet, using after filter residue and drying pulverizing as Crop fertilizer;
(4) effluent stream after filtering is to phosphorus pond for recovering, and in phosphorus pond for recovering, add magnesium hydroxide, the molar ratio making magnesium ion and nitrogen is 1:1, stirs;
(5) survey the pH of sewage, the pH value regulating sewage with sodium hydroxide is 10, after fully stirring, leaves standstill 4 hours, obtains struvite crystals;
(6) sewage enters aeration tank after phosphorus pond for recovering flows out, and regulate pH to 7.5, carrying out aerobic treatment, is non-woven biological film in aeration tank, and non-woven fabrics is industrial nonwoven cloth, and composition is terylene, and membrane flux is 12L/ (m 2h), the dissolved oxygen amount of aeration tank is 3mg/L;
(7) effluent stream after aeration, through artificial swamp pond, plants power flower and napier grass again in pond, every square metre of plantation 10 strains;
(8) sewage flowed out from artificial swamp pond is discharged after macroporous resin adsorption.
Adopt potassium dichromate process to measure COD, dilution inoculation method measures BOD 5, Na's reagent measures NH 3-N, weighting method surveys SS, and glass electrode method surveys pH.Table 1 is the disposition of the livestock and poultry cultivation sewage of embodiment.
The disposition of the livestock and poultry cultivation sewage of table 1 embodiment
Project COD/mg/L BOD 5/mg/L NH 3-N/mg/L pH SS/mg/L
Former water 30000 10000 2000 20000
Embodiment 1 85 25 24 6.5 60
Embodiment 2 82 22 22 7 61
Embodiment 3 84 24 22 7.5 63
Note: "-" represents that fluctuation is large.
As can be seen from the data of table 1, after the sewage of livestock and poultry cultivation processes by the treatment process of livestock and poultry cultivation sewage provided by the invention, COD(chemical oxygen demand (COD) in embodiment), BOD 5(biochemical oxygen demand (BOD)), NH 3-N(ammonia nitrogen), pH and SS(suspended solids) content all significantly better than former water, and to meet " livestock and poultry breeding industry pollution discharge standard ", illustrate that the treatment process of livestock and poultry cultivation sewage provided by the invention is feasible, effectively.

Claims (5)

1. a livestock and poultry cultivation sewage water treatment method, is characterized in that, technical scheme comprises the following steps:
(1) sewage is concentrated in collecting tank, regulates pH to 6 ~ 8;
(2) by regulate after sewage discharge to methane-generating pit, carry out anaerobically fermenting;
(3) from methane-generating pit discharge effluent stream to filtering basin, impurity is filtered;
(4) effluent stream after filtering is to phosphorus pond for recovering, and in phosphorus pond for recovering, add magnesium hydroxide, the molar ratio making magnesium ion and nitrogen is 1:1, stirs;
(5) survey the pH of sewage, the pH value regulating sewage with sodium hydroxide is 9 ~ 10, after fully stirring, leaves standstill 3 ~ 4 hours;
(6) sewage enters aeration tank after phosphorus pond for recovering flows out, and regulates pH to 6.5 ~ 7.5, carries out aerobic treatment;
(7) effluent stream after aeration, through artificial swamp pond, plants power flower and napier grass again in pond, every square metre of plantation 8 ~ 10 strains;
(8) sewage flowed out from artificial swamp pond is discharged after macroporous resin adsorption.
2. a kind of livestock and poultry cultivation sewage water treatment method as claimed in claim 1, is characterized in that, the adjustment of described step 1) pH regulates with the acetic acid of 5mol/L or the sodium hydroxide of 5mol/L.
3. a kind of livestock and poultry cultivation sewage water treatment method as claimed in claim 1, it is characterized in that, described step 3) is filtered sewage, use stainless 10 orders, 30 orders and 60 order filtering nets to filter respectively at the water-in of filtering basin, centre and water outlet, using after filter residue and drying is pulverized as Crop fertilizer.
4. a kind of livestock and poultry cultivation sewage water treatment method as claimed in claim 1, is characterized in that, have a stainless steel screen frame with holes in the phosphorus pond for recovering of described step 4), be embedded in phosphorus pond for recovering, non-woven fabrics is layered on bottom and the surrounding of screen frame.
5. a kind of livestock and poultry cultivation sewage water treatment method as claimed in claim 1, is characterized in that, is non-woven biological film in the aeration tank of described step 6), and non-woven fabrics is industrial nonwoven cloth, and composition is terylene, and membrane flux is 10 ~ 12L/ (m 2h), the dissolved oxygen amount of aeration tank is 3mg/L.
CN201510472712.8A 2015-08-05 2015-08-05 Treatment method for livestock breeding sewage CN105036475A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2908484Y (en) * 2005-09-14 2007-06-06 吴桐 Animal culturing sewage treatment system
CN103288303A (en) * 2013-06-27 2013-09-11 波鹰(厦门)科技有限公司 Livestock/poultry breeding wastewater resource utilization and regeneration recycling method
CN103304101A (en) * 2013-06-27 2013-09-18 波鹰(厦门)科技有限公司 Resource utilization and regeneration circulation utilization device for livestock and poultry breeding wastewater
CN203307182U (en) * 2013-06-27 2013-11-27 波鹰(厦门)科技有限公司 Resource utilization and regenerative recycling device of livestock and poultry breeding wastewater

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2908484Y (en) * 2005-09-14 2007-06-06 吴桐 Animal culturing sewage treatment system
CN103288303A (en) * 2013-06-27 2013-09-11 波鹰(厦门)科技有限公司 Livestock/poultry breeding wastewater resource utilization and regeneration recycling method
CN103304101A (en) * 2013-06-27 2013-09-18 波鹰(厦门)科技有限公司 Resource utilization and regeneration circulation utilization device for livestock and poultry breeding wastewater
CN203307182U (en) * 2013-06-27 2013-11-27 波鹰(厦门)科技有限公司 Resource utilization and regenerative recycling device of livestock and poultry breeding wastewater

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Application publication date: 20151111