CN102616982A - High-efficiency and low-consumption standard-reaching treatment method for wastewater from scale piggery raising - Google Patents
High-efficiency and low-consumption standard-reaching treatment method for wastewater from scale piggery raising Download PDFInfo
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Abstract
The invention discloses a high-efficiency and low-consumption standard-reaching treatment method for wastewater from scale piggery raising. According to the high-efficiency and low-consumption standard-reaching treatment method, after the wastewater from raising is subjected to solid-liquid separation through a hydraulic screen, 60-90 percent of wastewater enters an up-flow type anaerobic sludge blanket reactor; mostly COD (Chemical Oxygen Demand) is converted and methane is recovered; effluent enters an aerobic zone of a step-fed sequencing batch reactor for treatment; after the aerobic treatment is finished, the effluent and 10-40 percent wastewater enter an anoxic zone for denitrification; meanwhile, the basicity is replenished and the mixer enters a precipitation zone; supernate enters a magnesium ammonium phosphate crystallization reactor for recovering nitrogen and phosphorus; pig manure is added into residual sludge generated by the up-flow type anaerobic sludge blanket reactor and the step-fed sequencing batch reactor for treatment and then the mixture is fermented in a high-concentration anaerobic digester to generate methane; biogas slurry and biogas residue which are used as high-quality organic fertilizer are fertilized to the farmland; the generated methane is used for generating power; and electric energy is supplied to wastewater treatment equipment for operating. The high-efficiency and low-consumption standard-reaching treatment method disclosed by the invention has the advantages of simple process, convenience in resource recycling, long-term stable and reliable treatment effect and proper construction, operation and maintenance expenses.
Description
Technical field
The present invention relates to a kind of large-scale pig farm breeding wastewater efficient low-consume treatment process up to standard, belong to the environment-protection wastewater processing technology field.
Background technology
It is China's great environmental problem that livestock and poultry cultivation pollutes, and also is the significant problem in Chinese society doctrine new countryside construction and the agricultural sustainable development.China's livestock and poultry breeding industry pollution of area source up to about 30%, becomes one of source of pollution the most serious in China's water surrounding and the rural environment to the contribution rate of water body nitrogen phosphorus.Solving the livestock and poultry cultivation pollution problem is a vital task of China environmental protection and agricultural sustainable development.The comprehensive utilization of research and development livestock and poultry cultivation changing rejected material to useful resource is the key content of " national medium-term and long-term scientific and technical development program outline " preferential theme of environmental area " comprehensive anti-pollution and recycling waste " and " control of rural area pollution of area source " with the efficient decontrol gordian technique of pollutent, is the great scientific and technological demand of field of environment protection and agriculture field country.
More than 14000 of China's livestock and poultry farms in scale, 123.6 hundred million of livestock and poultry cultivation breeding stocks (only)/year, meat, egg ultimate production occupy first place in the world, and the output value surpasses 1.4 trillion yuan, accounts for 34% of the agriculture output value, is the important industry that involves the interests of the state and the people.Yet China's livestock and poultry cultivation prevention and cure of pollution problem becomes increasingly conspicuous in recent years.The breeding wastewater quantity discharged surpasses 20,000,000,000 tons/year, and 80% left and right sides plant breeding wastewater effluxes without any processing, becomes the primary pollution source of China's quality of water environment and rural environment quality deteriorated, jeopardizes urban and rural residents' drinking water safety.Point source through engineering approaches such as the conventional anaerobism biogas fermentation of livestock breeding wastewater and anaerobic-aerobic treatment process pollute that decontrol administers that technological investment is big, poor stability, working cost height, poor operability.
The large-scale pig farm breeding wastewater accounts for 10% of livestock breeding wastewater total amount, contains the organism of high density, and nitrogen and phosphorus are a kind of typical livestock breeding wastewaters.Pollute for solving the large-scale pig farm breeding wastewater, realize pollution reduction, key is to develop a kind of processing mode of high-efficient simple.For this reason, the present invention is utilized as target with processing up to standard of large-scale pig farm breeding wastewater efficient low-consume and nitrogen phosphorus nutrition element ecological circulation, captures that wastewater treatment investment is big, working cost is high, safeguards technical bottleneck such as complicacy, realizes that pollutant emission minimizes.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art, provide a kind of large-scale pig farm breeding wastewater efficient low-consume treatment process up to standard.
Large-scale pig farm breeding wastewater efficient low-consume treatment process up to standard is: breeding wastewater is after the hydraulic screen solid-liquid separation, and wherein, 60%～90% waste water gets into upflow anaerobic sludge blanket reactor; Transform most COD and reclaim biogas, the upflow anaerobic sludge blanket reactor water outlet gets into the sequencing batch reactor aerobic section of intaking step by step and handles, control DO 2～5mg/L; Reaction times 5～7h, aerobic treatment is accomplished the back and is got into the sequencing batch reactor anoxic section of intaking step by step with 10%～40% waste water and carry out denitrification denitrogenation, covers basicity simultaneously; Reaction times 6～8h gets into the sequencing batch reactor precipitating phase of intaking step by step then, deposition 0.5h; Supernatant gets into the ammoniomagnesium phosphate crystal reactor drum, utilizes 2MNaOH solution to regulate pH to 9.0, adds industrial hex-ammoniate; The mol ratio that makes Mg and P is 1.5～1.9, and aeration agitation is carried out phosphorus and nitrogen and reclaimed reaction times 1.5h; Regenerant effective constituent is magnesium ammonium phosphate, as slow-release fertilizer; In the high density anaerobic digester, ferment behind the excess sludge adding pig manure of the upflow anaerobic sludge blanket reactor and the sequencing batch reactor generation of intaking step by step and produce biogas; Anaerobically fermenting cycle a 25～30d; Liquid natural pond, natural pond slag as the high-quality organic fertilizer application in the farmland; The biogas that produces carries out marsh gas power generation behind biogas purifier, collecting methane device, the operation of electrical energy fed sewage treatment equipment; Upflow anaerobic sludge blanket reactor hydraulic detention time 7～12d; Sludge loading is no more than 2.0kgCOD/kgMLVSSd; Average sludge concentration MLVSS 20～40g/L, the sequencing batch reactor hydraulic detention time 4d of intaking step by step, sludge loading is no more than 1.0kgCOD/kgMLVSSd; Average sludge concentration MLVSS 2.5～4.0g/L, the excess sludge and the pig manure volume ratio that get in the high density anaerobic digester are 4:1.
The present invention compared with prior art, the beneficial effect that has:
1. pollutants removal rate is high: the effluent quality index meets " livestock and poultry breeding industry pollutant emission standard " (GB18596-2001);
2. substep is intake sequencing batch reactor through water inlet of implementation substep and the control of intelligence couplet; Utilize the COD of waste water self to realize denitrification system carbon source basicity self-equilibrating; Need not add methyl alcohol, sodium acetate etc. as denitrifying carbon source, also need not add alkali and regulate basicity, reduce working cost;
3. utilize the ammoniomagnesium phosphate crystal method to reclaim nitrogen phosphorus, effect stability is reliable, and working cost is moderate, and the magnesium ammonium phosphate of generation can be used as the farmland slow-release fertilizer, and fertilizer efficiency had good sustained release effect, utilization ratio are high, has reduced the amount of application of conventional nitrogen and phosphorus fertilizer;
Upflow anaerobic sludge blanket reactor and high density anaerobic digester can produce biogas be used for the generating.When temperature was higher than 20 ℃, gas deliverability was vigorous, and marsh gas power generation every day amount can satisfy sewage disposal device operation needs; When temperature is lower than 20 ℃; Gas deliverability fails gradually, and marsh gas power generation every day amount accounts for 40%～60% of total power consumption, and the electric power breach replenishes with commercial power;
5. mud and pig manure hybrid anaerobic fermentation produce the natural pond, and liquid natural pond, natural pond slag in the farmland, is effectively realized sludge reduction, innoxious, resource utilization as the high-quality organic fertilizer application;
6. running maintenance is convenient, expense is moderate, and treatment effect is reliable and stable, is fit to the processing up to standard of large scale of pig farm field breeding wastewater.
Description of drawings
Fig. 1 is the treatment process technical process up to standard of large-scale pig farm breeding wastewater efficient low-consume.
Embodiment
The embodiment of the invention a year live pig deliver the large-scale pig farm that surpasses 20,000 for sale and implement; This large-scale pig farm breeding wastewater generation (is seasonal variation for 60～120 tons/day; Summer autumn waters--limid eyes amount is big; The Winter-Spring water yield is little), in each embodiment, control upflow anaerobic sludge blanket reactor and intake step by step sequencing batch reactor different water inlet proportioning and hydraulic detention time.Breeding wastewater water quality: COD 4000～9000mg/L, BOD
52000～5000mg/L, NH
4 +-N 400～1000mg/L, TP 40～70mg/L, SS 1000～3500mg/L.
Embodiment 1
Breeding wastewater is after the hydraulic screen solid-liquid separation, and wherein, 60% waste water gets into upflow anaerobic sludge blanket reactor, transforms most COD and reclaims biogas; The upflow anaerobic sludge blanket reactor water outlet gets into the substep sequencing batch reactor aerobic section of intaking and handles, control DO 2mg/L, and reaction times 5h, aerobic treatment is accomplished the back and is got into the sequencing batch reactor anoxic section of intaking step by step with 40% waste water and carry out denitrification denitrogenation; Cover basicity simultaneously, reaction times 8h gets into the sequencing batch reactor precipitating phase of intaking step by step then; Deposition 0.5h, supernatant gets into the ammoniomagnesium phosphate crystal reactor drum, utilizes 2MNaOH solution to regulate pH to 9.0; Add industrial hex-ammoniate, the mol ratio that makes Mg and P is 1.5, and aeration agitation is carried out phosphorus and nitrogen and reclaimed; Reaction times 1.5h, regenerant effective constituent is magnesium ammonium phosphate, as slow-release fertilizer; In the high density anaerobic digester, ferment behind the excess sludge adding pig manure of the upflow anaerobic sludge blanket reactor and the sequencing batch reactor generation of intaking step by step and produce biogas; Anaerobically fermenting cycle a 25～30d; Liquid natural pond, natural pond slag as the high-quality organic fertilizer application in the farmland; The biogas that produces carries out marsh gas power generation behind biogas purifier, collecting methane device, the operation of electrical energy fed sewage treatment equipment; Upflow anaerobic sludge blanket reactor hydraulic detention time 7d; Sludge loading is no more than 2.0kgCOD/kgMLVSSd; Average sludge concentration MLVSS 20g/L, the sequencing batch reactor hydraulic detention time 4d of intaking step by step, sludge loading is no more than 1.0kgCOD/kgMLVSSd; Average sludge concentration MLVSS 2.5g/L, the excess sludge and the pig manure volume ratio that get in the high density anaerobic digester are 4:1.Upflow anaerobic sludge blanket reactor water outlet COD 400～1400mg/L, BOD
5200～600mg/L, NH
4 +-N 420～1050 mg/L, TP 40～70 mg/L; The substep sequencing batch reactor water outlet COD 350～500mg/L of intaking, BOD
5100～200mg/L, NH
4 +-N 50～80 mg/L, TP 30～60 mg/L; Ammoniomagnesium phosphate crystal reactor drum effluent quality COD 150～250mg/L, BOD
550～100mg/L, NH
4 +-N 20～40 mg/L, TP 3.0～7.0 mg/L, SS 50～150 mg/L.
Embodiment 2
Breeding wastewater is after the hydraulic screen solid-liquid separation, and wherein, 90% waste water gets into upflow anaerobic sludge blanket reactor, transforms most COD and reclaims biogas; The upflow anaerobic sludge blanket reactor water outlet gets into the substep sequencing batch reactor aerobic section of intaking and handles, control DO 5mg/L, and reaction times 7h, aerobic treatment is accomplished the back and is got into the sequencing batch reactor anoxic section of intaking step by step with 10% waste water and carry out denitrification denitrogenation; Cover basicity simultaneously, reaction times 6h gets into the sequencing batch reactor precipitating phase of intaking step by step then; Deposition 0.5h, supernatant gets into the ammoniomagnesium phosphate crystal reactor drum, utilizes 2MNaOH solution to regulate pH to 9.0; Add industrial hex-ammoniate, the mol ratio that makes Mg and P is 1.9, and aeration agitation is carried out phosphorus and nitrogen and reclaimed; Reaction times 1.5h, regenerant effective constituent is magnesium ammonium phosphate, as slow-release fertilizer; In the high density anaerobic digester, ferment behind the excess sludge adding pig manure of the upflow anaerobic sludge blanket reactor and the sequencing batch reactor generation of intaking step by step and produce biogas; Anaerobically fermenting cycle a 25～30d; Liquid natural pond, natural pond slag as the high-quality organic fertilizer application in the farmland; The biogas that produces carries out marsh gas power generation behind biogas purifier, collecting methane device, the operation of electrical energy fed sewage treatment equipment; Upflow anaerobic sludge blanket reactor hydraulic detention time 12d; Sludge loading is no more than 2.0kgCOD/kgMLVSSd; Average sludge concentration MLVSS40g/L, the sequencing batch reactor hydraulic detention time 4d of intaking step by step, sludge loading is no more than 1.0kgCOD/kgMLVSSd; Average sludge concentration MLVSS 4.0g/L, the excess sludge and the pig manure volume ratio that get in the high density anaerobic digester are 4:1.Upflow anaerobic sludge blanket reactor water outlet COD 600～1800mg/L, BOD
5250～700mg/L, NH
4 +-N 420～1100 mg/L, TP 40～70 mg/L; The substep sequencing batch reactor water outlet COD 300～400mg/L of intaking, BOD
5100～150mg/L, NH
4 +-N 30～60 mg/L, TP 30～60 mg/L; Ammoniomagnesium phosphate crystal reactor drum effluent quality COD 100～200mg/L, BOD
540～90mg/L, NH
4 +-N 20～30 mg/L, TP 4.0～6.5mg/L, SS 50～100 mg/L.
Embodiment 3
Breeding wastewater is after the hydraulic screen solid-liquid separation, and wherein, 70% waste water gets into upflow anaerobic sludge blanket reactor, transforms most COD and reclaims biogas; The upflow anaerobic sludge blanket reactor water outlet gets into the substep sequencing batch reactor aerobic section of intaking and handles, control DO 4mg/L, and reaction times 6h, aerobic treatment is accomplished the back and is got into the sequencing batch reactor anoxic section of intaking step by step with 30% waste water and carry out denitrification denitrogenation; Cover basicity simultaneously, reaction times 7h gets into the sequencing batch reactor precipitating phase of intaking step by step then; Deposition 0.5h, supernatant gets into the ammoniomagnesium phosphate crystal reactor drum, utilizes 2MNaOH solution to regulate pH to 9.0; Add industrial hex-ammoniate, the mol ratio that makes Mg and P is 1.9, and aeration agitation is carried out phosphorus and nitrogen and reclaimed; Reaction times 1.5h, regenerant effective constituent is magnesium ammonium phosphate, as slow-release fertilizer; In the high density anaerobic digester, ferment behind the excess sludge adding pig manure of the upflow anaerobic sludge blanket reactor and the sequencing batch reactor generation of intaking step by step and produce biogas; Anaerobically fermenting cycle a 25～30d; Liquid natural pond, natural pond slag as the high-quality organic fertilizer application in the farmland; The biogas that produces carries out marsh gas power generation behind biogas purifier, collecting methane device, the operation of electrical energy fed sewage treatment equipment; Upflow anaerobic sludge blanket reactor hydraulic detention time 10d; Sludge loading is no more than 2.0kgCOD/kgMLVSSd; Average sludge concentration MLVSS30g/L, the sequencing batch reactor hydraulic detention time 4d of intaking step by step, sludge loading is no more than 1.0kgCOD/kgMLVSSd; Average sludge concentration MLVSS 3.0g/L, the excess sludge and the pig manure volume ratio that get in the high density anaerobic digester are 4:1.Upflow anaerobic sludge blanket reactor water outlet COD 500～1600mg/L, BOD
5200～700mg/L, NH
4 +-N 400～1100 mg/L, TP 40～70 mg/L; The substep sequencing batch reactor water outlet COD 350～450mg/L of intaking, BOD
5150～200mg/L, NH
4 +-N 40～70 mg/L, TP 30～60 mg/L; Ammoniomagnesium phosphate crystal reactor drum effluent quality COD 100～250mg/L, BOD
550～100mg/L, NH
4 +-N 20～30 mg/L, TP 3.0～6.5mg/L, SS 50～120 mg/L.
Main processing structures design variable is summarized as follows.
Upflow anaerobic sludge blanket reactor adopts the cubes skeleton construction, outside thermal insulation layer, the length * wide * height=11.4m * 8m * 8.8m of laying.
The sequencing batch reactor of intaking step by step adopts the cubes skeleton construction, outside thermal insulation layer, the length * wide * height=12.5m * 10m * 4m of laying.
Ammoniomagnesium phosphate crystal reactor drum planeform is circular, and reaction zone is of a size of Φ 5.4m * 6.5m, and the installation of reaction zone bottom is revolved mixed air diffusion aerator and carried out aeration agitation.The crystallization collecting region is positioned at the reaction zone below, adopts the terrace with edge structure, high 1m, 45 ° of bus and horizontal sextant angles.
The high density anaerobic digester adopts buried round shape skeleton construction, is convenient to unpowered charging, is of a size of Φ 10m * 6m.
Each embodiment is through trimestral operation, and the effluent quality index all meets " livestock and poultry breeding industry pollutant emission standard " (GB18596-2001), and wherein excrement colibacillus group number and roundworm egg do not detect.
Concrete treatment effect such as following table:
| Project | Water inlet | Water outlet | " standard " requirement |
| COD（mg/L） | 4000～9000 | ≤250 | ≤400 |
| BOD 5（mg/L） | 2000～5000 | ≤100 | ≤150 |
| NH 4 +-N（mg/L） | 400～1000 | ≤40 | ≤80 |
| SS（mg/L） | 1000～3500 | ≤150 | ≤200 |
| TP（mg/L） | 40～70 | ≤7.0 | ≤8.0 |
This method day processing costs is adjusted
Be 1 ton of pig farm breeding wastewater of every processing, need 2.83 yuan of clean inputs.Compared with prior art, the clean input reduces by 30%.
Claims (1)
1. a large-scale pig farm breeding wastewater efficient low-consume treatment process up to standard is characterized in that breeding wastewater is after the hydraulic screen solid-liquid separation, wherein; 60%～90% waste water gets into upflow anaerobic sludge blanket reactor, transforms most COD and reclaims biogas, and the upflow anaerobic sludge blanket reactor water outlet gets into the sequencing batch reactor aerobic section of intaking step by step and handles; Control DO 2～5mg/L, reaction times 5～7h, aerobic treatment is accomplished the back and is got into the sequencing batch reactor anoxic section of intaking step by step with 10%～40% waste water and carry out denitrification denitrogenation; Cover basicity simultaneously, reaction times 6～8h gets into the sequencing batch reactor precipitating phase of intaking step by step then; Deposition 0.5h, supernatant gets into the ammoniomagnesium phosphate crystal reactor drum, utilizes 2MNaOH solution to regulate pH to 9.0; Add industrial hex-ammoniate, the mol ratio that makes Mg and P is 1.5～1.9, and aeration agitation is carried out phosphorus and nitrogen and reclaimed; Reaction times 1.5h, regenerant effective constituent is magnesium ammonium phosphate, as slow-release fertilizer; In the high density anaerobic digester, ferment behind the excess sludge adding pig manure of the upflow anaerobic sludge blanket reactor and the sequencing batch reactor generation of intaking step by step and produce biogas; Anaerobically fermenting cycle a 25～30d; Liquid natural pond, natural pond slag as the high-quality organic fertilizer application in the farmland; The biogas that produces carries out marsh gas power generation behind biogas purifier, collecting methane device, the operation of electrical energy fed sewage treatment equipment; Upflow anaerobic sludge blanket reactor hydraulic detention time 7～12d; Sludge loading is no more than 2.0kgCOD/kgMLVSSd; Average sludge concentration MLVSS 20～40g/L, the sequencing batch reactor hydraulic detention time 4d of intaking step by step, sludge loading is no more than 1.0kgCOD/kgMLVSSd; Average sludge concentration MLVSS 2.5～4.0g/L, the excess sludge and the pig manure volume ratio that get in the high density anaerobic digester are 4:1.
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| CN105036489A (en) * | 2015-08-21 | 2015-11-11 | 浙江大学 | Livestock/poultry culture wastewater deep denitrification and dephosphorization standard treatment device and process |
| CN105384248A (en) * | 2015-11-06 | 2016-03-09 | 广东温氏食品集团股份有限公司 | Pig breeding farm waste water anaerobic digestion solution aerobic treatment method |
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| CN105541008A (en) * | 2015-12-22 | 2016-05-04 | 浙江大学 | An efficient denitrifying and carbon-removing device for culture wastewater anaerobic biogas slurry with a low C/N ratio and a process thereof |
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| CN103970414A (en) * | 2014-03-18 | 2014-08-06 | 深圳市艾优尼科技有限公司 | Application icon management method and terminal |
| CN103970414B (en) * | 2014-03-18 | 2017-06-13 | 深圳市艾优尼科技有限公司 | One kind management application program image target method and terminal |
| CN104609651A (en) * | 2015-01-06 | 2015-05-13 | 东华大学 | Wastewater advanced treatment system for large-scale pig farms |
| CN104609651B (en) * | 2015-01-06 | 2016-04-06 | 东华大学 | A kind of Large-scale pig farm advanced waste treatment system |
| CN105036489B (en) * | 2015-08-21 | 2017-05-17 | 浙江大学 | Livestock/poultry culture wastewater deep denitrification and dephosphorization standard treatment device and process |
| CN105036489A (en) * | 2015-08-21 | 2015-11-11 | 浙江大学 | Livestock/poultry culture wastewater deep denitrification and dephosphorization standard treatment device and process |
| CN105384302A (en) * | 2015-09-16 | 2016-03-09 | 徐雪祥 | Aquaculture wastewater processing system and method thereof |
| CN105384248A (en) * | 2015-11-06 | 2016-03-09 | 广东温氏食品集团股份有限公司 | Pig breeding farm waste water anaerobic digestion solution aerobic treatment method |
| CN105541008B (en) * | 2015-12-22 | 2017-12-26 | 浙江大学 | The low C/N of breeding wastewater is than anaerobism biogas slurry efficient denitrification carbon removal treatment technique |
| CN105541008A (en) * | 2015-12-22 | 2016-05-04 | 浙江大学 | An efficient denitrifying and carbon-removing device for culture wastewater anaerobic biogas slurry with a low C/N ratio and a process thereof |
| CN105585210A (en) * | 2015-12-23 | 2016-05-18 | 常熟理工学院 | Novel technology for treating aquaculture wastewater of fungus-aquatic plant symbiotic system |
| CN107055969A (en) * | 2017-06-01 | 2017-08-18 | 上海兴牧环保科技有限公司 | Herding wastewater treatment and excrement comprehensive utilization process |
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| CN109574224A (en) * | 2018-12-10 | 2019-04-05 | 中国科学院生态环境研究中心 | A kind of system and method for waste water of livestock poultry processing |
| CN109574224B (en) * | 2018-12-10 | 2024-02-13 | 中国科学院生态环境研究中心 | Livestock and poultry wastewater treatment system and method |
| CN109706188A (en) * | 2019-01-07 | 2019-05-03 | 广东广垦畜牧工程研究院有限公司 | A method of improving piggery wastewater form anaerobic fermentation methane yield |
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Application publication date: 20120801 |