Technique for treating pig raising liquid waste by circular anaerobic reactor, sequencing batch biofilm, constructed wetland and facultative lagoon

A sequencing batch biofilm and constructed wetland technology, applied in the field of combined processes, can solve the problems of high cost and difficult treatment of pig-raising wastewater, and achieve the effect of solving high pollutant concentration, good denitrification and phosphorus removal ability, and reducing volume.

Inactive Publication Date: 2012-06-20
NANCHANG UNIV
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  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to address the deficiencies in the prior art and propose a new process for treating pig farm wastewater to solve the problems of difficult and high cost of pig wastewater treatment

Method used

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  • Technique for treating pig raising liquid waste by circular anaerobic reactor, sequencing batch biofilm, constructed wetland and facultative lagoon
  • Technique for treating pig raising liquid waste by circular anaerobic reactor, sequencing batch biofilm, constructed wetland and facultative lagoon
  • Technique for treating pig raising liquid waste by circular anaerobic reactor, sequencing batch biofilm, constructed wetland and facultative lagoon

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Embodiment Construction

[0021] The structure of the invention includes: internal and external circulation anaerobic reactors, grids, hydrolytic acidification ponds, sequencing batch biofilm reactors, regulating ponds, artificial wetlands and facultative ponds.

[0022] This process is applied to a large-scale pig farm with a water volume of 100m 3 / d, raw water quality is COD6000~10000mg / L, NH 4 + -N500~1500mg / L, TP40~100mg / L.

[0023] ① Raw water first enters the hydrolysis acidification tank to convert complex organic pollutants into simple organic pollutants. The effluent enters the internal and external circulation anaerobic reactor, and most of the easily degradable organic matter can be removed. However, due to the release of phosphorus by phosphorus accumulating bacteria in an anaerobic environment, TP increased. The water quality of the effluent after the anaerobic process is as follows: COD400~1000mg / L, NH 4 + -N500~1500mg / L, TP55~150mg / L.

[0024] ②The anaerobic effluent enters the s...

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Abstract

The invention discloses a technique for treating pig raising liquid waste by a circular anaerobic reactor, a sequencing batch biofilm, a constructed wetland and a facultative lagoon, which comprises the steps: pig farm liquid waste automatically flows into a collection pipe network through a pipe tunnel and flows through a grating and a hydrolysis acidification pool to remove the large granular pollutants and floaters in the liquid waste so as to improve the biodegradability of the liquid waste; the liquid waste enters external and internal circular anaerobic reactors to remove most part of COD by the efficient anaerobic digestion function, and the liquid waste enters a successive regulating pool; the water flowing out from the regulating pool enters a sequencing batch biofilm reactor, and the water is supplied with air by a blower to perform nitration reaction at the aeration stage and to perform anoxic / anaerobic nitration reaction at the stationary stage so as to further remove the pollutants in the liquid waste, such as COD, ammonia nitrogen and phosphorus, and the like; the water discharged from the sequencing batch biofilm reactor flows into a constructed wetland to better remove pollutants in the liquid waste, such as COD, N and P, and the like; the water discharged from the constructed wetland flows into a facultative lagoon for further denitrogenation and dephosphorization treatments, and the water is discharged after satisfying a discharge standard.

Description

[0001] technical field [0002] The invention relates to a combined process for treating and discharging wastewater from large-scale pig farms and belongs to the technical field of environmental protection water treatment. Background technique [0003] Since the 1990s, my country's animal husbandry has developed rapidly, and the pig industry has generally developed in the direction of scale and intensification, which also causes the pollutants it produces to be discharged in a relatively concentrated manner and far away. Far beyond the natural carrying capacity of the local environment, it will also cause serious pollution to the environment. According to relevant research, the wastewater discharged from pig farming is mainly composed of pig urine (feces) and flushing wastewater from pig houses. 4 + -N 450~1500mg / L, TP 100~330mg / L, it can be seen that the pig farm wastewater is a high-concentration organic wastewater, and its nitrogen and phosphorus content is also seriousl...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 万金保胡昌旭熊友强顾平陈琳
Owner NANCHANG UNIV
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