Method for treating rural domestic sewage based on improved A2O technology

Abstract

The invention provides a method for treating rural domestic sewage based on an improved A2O technology and relates to rural sewage treatment methods, aiming at solving the problems of existing rural domestic sewage equipment that the investment is great, the operation cost is high and the nitrogen and phosphorus removing effect is poor. The method comprises the following steps: 1, preparing integrated equipment; 2, starting: after the rural domestic sewage passes through a septic tank, enabling the rural domestic sewage and reflowing sludge to enter an anaerobic tank of the integrated equipment and carrying out anaerobic phosphorus releasing; then enabling output water of the anaerobic tank to enter an anoxic tank from the tank bottom; after mixing the output water with a reflowing nitrification solution, carrying out denitrification reaction; then enabling a product to enter an aerobic tank and carrying out reaction including aerobic phosphorus absorption, nitrification, organic matter oxidization and decomposition and the like; after treating, discharging through a secondary sedimentation tank; finishing starting after each index reaches the standard; 3, stably operating the rural domestic sewage to finish treatment. According to the method provided by the invention, the removing rates of COD (Chemical Oxygen Demand), ammonia nitrogen, total nitrogen and total phosphorus of the output water are 90 percent to 94 percent, 98 percent to 99 percent, 57 percent to 73 percent and 88 percent to 93 percent respectively.

Description

technical field [0001] The invention belongs to the field of domestic sewage treatment in rural areas, and in particular relates to improving A 2 A method for synchronous denitrification and dephosphorization of the O process. Background technique [0002] With the rapid development of social economy, the economic income of farmers continues to increase, and the lifestyle of farmers has also undergone tremendous changes. The popularization of tap water, sanitary ware, washing machines, bathing and other facilities have also entered the homes of ordinary people, making the rural per capita domestic water consumption and Increased sewage discharge. At the same time, due to the extensive application of chemical fertilizers, the use of traditional farmyard manure has been reduced, resulting in the loss of important digestion channels for rural domestic sewage. The disorderly discharge of rural domestic sewage, untreated and utilized feces and various sewage seriously pollute t...

AI Technical Summary

Problems solved by technology

[0004] The invention aims to solve the technical problems of large investment, high operation cost and poor nitrogen and phosphorus removal effect of rural domestic sewage treatment equipment, and provides a method based on improved A 2 Method of O process for treating rural domestic sewage

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