Efficient aerobic treatment method for kitchen anaerobic wastewater

Abstract

The invention discloses an efficient aerobic treatment method for kitchen anaerobic wastewater, and belongs to the field of kitchen sewage treatment. According to the invention, aiming at the high ammonia nitrogen characteristic of wastewater, the denitrification effect is enhanced through independently designed and researched denitrification reactor and an endogenous denitrification anaerobic pool as well as proper condition control. Under the condition of considering a problem that kitchen wastewater is imbalanced in C / N, an anoxia tank is preposed to perform denitrification by fully using easily biodegradable COD (chemical oxygen demand) to reduce the demand on carbon sources is saved, and can also be used as a biological selector to prevent sludge from being expanded. Meanwhile, because the ratio of a non-aeration area designed in the method is relatively large, the energy consumption is low, especially, the denitrification reactor has an extremely high nitrogen load, but has an extremely low energy consumption. Treated water completely reaches local connecting-pipe discharge standards.

Description

technical field [0001] The invention discloses an efficient aerobic treatment method for kitchen anaerobic wastewater, which belongs to the field of kitchen sewage treatment. Background technique [0002] With the rapid economic growth and the acceleration of urbanization, the generation of urban kitchen waste is increasing, and the pollution to the environment is becoming more and more serious. The reduction, harmless and resourceful disposal of kitchen waste has become become hot. [0003] Since 2005, Beijing, Shanghai, Xining, Ningbo, Suzhou and other cities have issued regulations and policies to prohibit untreated kitchen waste from being fed directly to pigs, and have established urban kitchen waste recycling facilities. [0004] The present invention takes the kitchen wastewater produced in the kitchen waste treatment process of Jiangsu Clean Environment Technology Co., Ltd. as the research object. The company created the "Suzhou model" of kitchen waste treatment wit...

AI Technical Summary

Problems solved by technology

Due to the kitchen wastewater generated during the company's kitchen waste treatment process, after anaerobic treatment, the wastewater quality is complex, with the characteristics of high ammonia nitrogen, high COD, high salt and high SS, and it is difficult to treat, especially for kitchen waste. The high concentration of nitrogen contained in the wastewater, if it cannot be treated in depth and discharged randomly, can cause eutrophication of the water body

Since the large-scale and intensive treatment of kitchen waste is in its infancy and has entered a stage of rapid development in China, there are few studies on the treatment process of kitchen waste

However, in China, there is generally a problem of low total nitrogen removal efficiency in the treatment processes of other similar high-ammonia-nitrogen wastewater such as landfill leachate.

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