Slaughter and meat processing industrial wastewater treatment device and operation method thereof

Abstract

The invention discloses a slaughter and meat processing industrial wastewater treatment device and an operation method thereof. The slaughter and meat processing industrial wastewater treatment device comprises an improved A2/O reactor and an SNAD autotrophic nitrogen removal reactor which are sequentially connected through a pipeline. A short-cut nitrification and denitrification phosphorus removal process is operated in the improved A2/O reactor, screening and gathering of AOB are completed by controlling dissolved oxygen and sludge age, stable operation of short-cut nitrification is achieved, denitrification phosphorus-accumulating bacteria are enriched by prolonging the sludge age, a denitrification phosphorus removal process is started, and finally most of ammonia nitrogen, COD and TP are removed in the improved A2/O reactor. Short-cut nitrification, anaerobic ammonia oxidation and denitrification processes are operated in the SNAD autotrophic nitrogen removal reactor, and enhanced removal of ammonia nitrogen, total nitrogen and COD is realized by controlling proper dissolved oxygen and temperature.

Description

technical field [0001] The invention belongs to the technical field of industrial wastewater treatment devices and operating methods, and in particular relates to a slaughtering and meat processing industrial wastewater treatment device and an operating method thereof. Background technique [0002] With the rapid development of the meat processing industry, the proportion of slaughtering and meat processing wastewater in industrial wastewater is increasing year by year. Slaughtering wastewater mainly comes from pen washing, rinsing, washing water for meat and viscera after slaughter, slaughtering equipment and workshops Ground flushing water, etc., belongs to high-concentration organic wastewater. The sewage has the characteristics of large changes in water quality and quantity, high organic content, and good biodegradability. The wastewater contains various pollution factors such as COD, SS, ammonia nitrogen, and gastrointestinal bacteria. Harmless treatment and direct disc...

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Problems solved by technology

[0003] At this stage, the denitrification and phosphorus removal process of industrial sewage treatment plants in my country generally has the disadvantages of high energy consumption, low removal efficiency, and unstable operation. How to improve the removal effect of nitrogen and phosphorus removal and save energy to solve the increasingly serious water pollution problem in our country The pollution problem is of great significance in terms of saving money, improving the effect of sewage treatment and optimizing the process of nitrogen and phosphorus removal in sewage at the present stage of our country.

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