Treatment combined process for pig farm waste water with high nitrogen content

Abstract

The invention provides a treatment combined process for pig farm waste water with high nitrogen content, which is characterized in that the process adopts a combined process realized by an unpowered inside and outside circulation (IOC) anaerobic reactor, an SBBR sequencing batch type biomembrane reactor and artificial swamp. The process flow of the combined process comprises the following steps: a, removing large-grain pollutants and floaters in sewage by mechanical grids; b, carrying out hydrolysis and acidification; c, using the inside and outside circulation anaerobic reactor for high-efficient anaerobic digestion; d, using SBBR reactor for aerobic / anoxic nitration; and e, carrying out the depth treatment by the artificial swamp, and realizing the high-efficient purification on the sewage through substrate filtering, absorption, precipitation, ion exchange, plant absorption and microbiological degradation. The invention can be applicable for the treatment and the integrated utilization of the waste water in big-and-middle-sized pig farms.

Description

technical field [0001] The invention relates to a pig farm wastewater treatment process, which belongs to the technical field of environmental protection wastewater treatment. Background technique [0002] With the development of my country's animal husbandry and the increasingly fierce competition in the industry, the large-scale and intensive development of animal husbandry has become an inevitable trend. Large-scale pig farms have higher livestock and poultry breeding technology, and unified management reduces costs. , improving economic benefits, but the environmental pollution caused by a large amount of concentrated excrement and sewage discharge is becoming more and more serious. The large amount of feces and urine discharged from livestock and poultry and the large amount of wastewater from farms contain pollutants such as nitrogen, phosphorus and COD. Very high, containing a lot of organic matter, ammonia nitrogen. Relevant data show that BOD in pig farm wastewater i...

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Problems solved by technology

[0006] The purpose of the present invention is to propose a new process for treating high-nitrogen pig farm wastewater to solve the problems in the above-mentioned wastewater treatment method. Aiming at the characteristics of large changes in the quality and quantity of pig farm wastewater, imbalanced nutrient element ratios, and high ammonia nitrogen content, at the same time Considering the problem of deep denitrification and deep removal of organic matter, a combined process of IOC-membrane SBBR-constructed wetland is proposed

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