Kitchen waste fermentation wastewater treatment device and method

Abstract

The invention relates to a kitchen waste fermentation wastewater treatment device and method. The kitchen waste fermentation wastewater treatment device is an integrated reactor and comprises an anoxic-negative pressure air stripping treatment area, an aerobic biological treatment area and a coagulative precipitation area which are connected in sequence; wherein part of nitrification liquid in theaerobic biological treatment area flows back to the anoxic-negative pressure stripping treatment area; and chemical sludge generated in the coagulative precipitation area is periodically discharged.The invention provides an anoxic-negative pressure air stripping treatment method for high-temperature high-ammonia-nitrogen kitchen waste fermentation wastewater. The pH value is increased through anoxic denitrification, and the ammonia nitrogen is further blown off by adopting negative pressure, so that the treatment efficiency of the ammonia nitrogen in the wastewater is greatly improved, and the problems of inhibition of high ammonia nitrogen on microorganisms in a biological treatment system, long residence time in the nitrification process of the high ammonia nitrogen wastewater, high energy consumption and insufficient denitrification carbon source are solved; and meanwhile, a coagulating sedimentation process is adopted to replace a membrane treatment process, so that the investment and the cost of kitchen wastewater treatment are greatly reduced. And the effluent can reach the standard of the table 2 of GB 16889-2008.

Description

technical field [0001] The invention relates to the technical field of sewage treatment and environmental protection, in particular to a device and method for treating kitchen garbage fermentation wastewater. Background technique [0002] At present, the treatment facilities for food waste fermentation wastewater have low treatment efficiency, large investment, high operating costs, complex operation management, and the biological treatment process is susceptible to food waste fermentation wastewater. [0003] Inhibition of high temperature and high ammonia nitrogen. In recent years, food waste fermentation wastewater treatment methods and treatment device technologies have developed rapidly. For example, CN107311403A "Food Waste Fermentation Wastewater Treatment Device" and CN107352745A "Food Waste Fermentation Wastewater Treatment Method" have been disclosed in Chinese patents. However, the above treatment methods The combined process of "primary oil separation - water vo...

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Problems solved by technology

[0004] The object of the present invention is to provide a device and method for treating kitchen waste fermentation wastewater. By integrating ammonia nitrogen negative pressure blow-off, the treatment efficiency of high-temperature and high-ammonia nitrogen kitchen waste fermentation wastewater is greatly improved, and the impact of high ammonia nitrogen on the waste water is effectively slowed down. The inhibition of microorganisms in the subsequent biological treatment system solves the problems of long residence time, high energy consumption, and insufficient carbon source for denitrification of high ammonia nitrogen wastewater in the nitrification process, and the system has high denitrification efficiency; at the same time, coagulation sedimentation is used instead of membrane treatment Further remove organic matter and improve sludge settling performance

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