Total nitrogen in slaughterhouse wastewater

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The excessive discharge of nitrogen in the water will cause eutrophication of the water body, make algae multiply in large numbers, and lead to algal blooms. They compete with other species in the water for living space, causing a large number of fish and shrimp deaths, and increasing the pollution of the water body; On the other hand, nitrate will be reduced to nitrite in human body, which is harmful to health. Therefore, China has gradually incorporated total nitrogen into the discharge standard requirements of sewage treatment system. The total nitrogen index is becoming more and more stringent, but most sewage plants still do not have total nitrogen treatment capacity, especially the major sewage stations and sewage plants that have been built. The cost of reconstruction and reconstruction is too high, so the situation is very serious. At present, the removal of nitrogen in water is mainly biological nitrogen removal. Through nitrification under aerobic conditions and denitrification under anaerobic conditions, nitrogen in organic form in water is transformed into harmless nitrogen. Existing processes, whether activated sludge process or biofilm process, have certain removal effect on nitrogen in sewage, but There are some limitations and complexity in operation and effect.