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A/O-SBBR-oxidation pond-artificial wetland treatment pig farm biogas slurry technology

An O-SBBR-, artificial wetland technology, applied in the field of environmental science and engineering, can solve the problems of unstable treatment effect, difficult to meet the treatment standard, high operation and management costs, and achieve easy debugging and management, save chemical costs, and low operating costs Effect

Inactive Publication Date: 2017-06-13
NANCHANG UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, a single treatment process is not easy to meet the standard, and there are problems such as unstable treatment effect and high operation and management costs. At this stage, there is still a lack of economical, reasonable and technologically mature processes to treat this type of wastewater

Method used

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  • A/O-SBBR-oxidation pond-artificial wetland treatment pig farm biogas slurry technology

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Embodiment Construction

[0025] The processing capacity is 400m 3 / d pig farm biogas slurry, biogas slurry water quality: CODCr 1200~1500mg / L, NH 3 -N 500~630mg / L, TP 20~30mg / L, SS 450~800mg / L. The pig farm biogas slurry enters the adjustment pond after passing through the grille, and the water quality and water quantity are adjusted. Then the wastewater enters the anoxic section of the A / O process, where the hydrolysis and acidification of heterotrophic bacteria is used to degrade organic matter and improve the biodegradability of wastewater. The effluent from the anoxic section flows into the aerobic section, where a large amount of organic matter is degraded through microbial metabolism and most of the ammonia nitrogen is removed through nitrification under aerobic conditions. At the same time, part of the mixed liquid in the aerobic tank is controlled to flow back to the anoxic tank to improve the effect of denitrification and denitrification. Aerobic pool effluent CODCr 900~1000mg / L, NH 3 -N ...

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Abstract

The invention discloses an A / O-SBBR-oxidation pond-artificial wetland treatment pig farm biogas slurry technology. Pig farm biogas slurry sequentially passes through a regulating tank, an anoxia tank / aerobiotic tank (A / 0), a secondary sedimentation tank, a sequencing batch type membrane bioreactor (SBBR), an oxidation pond and artificial wetland and finally reaches the standard to be discharged. The technological treatment effect is stable, the shock resistance load capacity is high, operation is easy, and the operating cost is low. According to the SBBR running mode and time parameters, water flows in for 1 h, aeration is performed for 3.5 h, anoxia is performed for 2 h, aeration is performed for 3.5 h, precipitation is performed for 1 h, and drainage is performed for 1 h. All indexes of the outflow pig farm biogas slurry treated through the combination technology conform to the discharge standard of pollutants for livestock and poultry breeding (GB 18596-2001).

Description

technical field [0001] The invention relates to a combination process of anoxic / aerobic (A / O), sequencing batch biofilm reactor (SBBR), oxidation pond and constructed wetland (CW) for treating pig farm biogas slurry, which belongs to the field of environmental science and engineering technology . Background technique [0002] In recent years, my country's livestock and poultry breeding industry has developed rapidly, forming a large-scale and intensive development trend. At the same time, a large amount of livestock and poultry manure is produced, and the environmental problems caused by it are becoming increasingly serious. The Bulletin of the First National Survey of Pollution Sources shows that the annual discharge of livestock and poultry farming is 12.6826 million tons of chemical oxygen demand, 1.0248 million tons of total nitrogen, and 160,400 tons of total phosphorus. In addition, it is estimated that in 2020, the national production of livestock and poultry manure ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
CPCC02F1/00C02F1/52C02F3/02C02F3/1268C02F3/28C02F3/32C02F3/325C02F3/34C02F9/00C02F2301/08Y02E50/30
Inventor 万金保付煜王建永刘峰
Owner NANCHANG UNIV
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