An urban sewage treatment plant effluent quality evaluation method

Abstract

The invention provides an urban sewage treatment plant effluent quality evaluation method. The effluent discharge water quality standard of the municipal sewage treatment plant is quantified into a unified value, wherein the indexes are defined as water quality indexes SZI; the method comprises the following steps of: respectively adopting a Limo method for different types of control projects according to statistical data and actual investigation conditions; a worst factor discrimination method is used for calculating the water quality index SZI of various pollutants, a comprehensive index method is used for carrying out weighted assignment on different types of control items, finally, the control items are simplified into unique scores, the discharge water quality of a sewage plant can becomprehensively reflected, and the method has the characteristics of comprehensiveness, simplicity and convenience, is convenient for supervision of competent departments and has high operability. The method not only has guiding significance for national pollutant emission reduction, but also can be used for carrying out unified assessment on the technical levels of all national sewage treatmentplants.

Description

technical field [0001] The invention relates to the technical field of water pollution control, in particular to a method for evaluating the quality of effluent from urban sewage treatment plants. Background technique [0002] At present, the core of my country's environmental management is to improve environmental quality, and reducing pollutant discharge is the fundamental means to improve environmental quality. Stationary pollution sources are the main source of pollutant discharge in my country. At present, urban sewage treatment plants bear the pressure of reducing emissions from most water pollution sources in my country. At present, the discharge of sewage plants uniformly implements the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" GB18918-2002, which lists specific limits for a series of pollutant control items. As sewage treatment plants around the world have successively carried out standard upgrading and upgrading, almost all sewage treatment...

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Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the present invention provides a method for evaluating the effluent quality of urban sewage treatment plants, which is used to solve the problem of calculating the overall pollution degree in the prior art by assigning weights to the proportions of different pollution factors. Differences in the detection methods of different pollutants and the degree of impact of different pollutants on water quality lead to inaccurate evaluation results