Competitive method for determining volume of biological reaction tank, and sewage treatment method

Abstract

The embodiments of the invention provide a competitive method for determining the volume of a biological reaction tank, and a sewage treatment method, which are applied to a bioreactor system. The bioreactor system comprises an anoxic tank and an aerobic tank. The method for determining the volumes of the anoxic tank and the aerobic tank comprises the steps of calculating sludge retention time according to chemical oxygen consumption of inflow water of a bioreactor and five days' biochemical oxygen demand of the inflow water of the bioreactor; determining a first coefficient at least according to a corresponding relation between the first coefficient and the quotient of a suspended matter concentration of the inflow water and a difference between five days' biochemical oxygen demands of the inflow water and outflow water; calculating an average concentration of volatile suspended solids of mixed liquid in the bioreactor according to the first coefficient and a preset average concentration of suspended solids of first biological mixed liquid; calculating the volume of the biological reaction tank at least according to the design flow, sludge yield coefficient and sludge retention time of the bioreactor system. After the competitive method and the sewage treatment method are applied, the sewage treatment capacity of the bioreactor system is enabled to be matched with the design flow.

Description

technical field [0001] The invention relates to the technical field of waste water treatment, in particular to a comprehensive method for determining the volume of a biological reaction tank and a sewage treatment method. Background technique [0002] At present, the activated sludge method is the most commonly used biochemical treatment method in the field of wastewater treatment technology. The anoxic / aerobic process refers to adding an anoxic biological treatment process before the conventional aerobic activated sludge treatment system. The anoxic / aerobic process can not only remove organic pollutants in wastewater, but also remove nitrogen and phosphorus at the same time, which can significantly improve the biodegradability of wastewater. [0003] A bioreactor system applying the anoxic / aerobic process usually includes an anoxic tank, an aerobic tank and a sludge-water separation device. When designing the bioreactor system, it is very important to select the appropriat...

AI Technical Summary

Problems solved by technology

However, the tank capacity of the bioreactor system determined by the prior art is not accurate enough, which leads to the technical problem that the sewage treatment capacity of the bioreactor system does not match the design flow rate.

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