Method for assessing robustness of activated sludge system based on reinforcing effect of calcium

Abstract

The invention discloses a method for assessing robustness of an activated sludge system based on a reinforcing effect of calcium. The method comprises the following steps: 1) taking mud from a sewage disposal plant, conducting inoculating and habituated culture, implementing cooling and water quality impact experiments and adding CaCl2, and determining microbial respiratory atlases before and after adding the calcium; determining OURs, OURq, OURe, OURen and OURenc in accordance with the obtained microbial respiratory atlases; in accordance with the obtained parameters, acquiring an autotrophic bacterium respiratory rate OURn, so as to judge the robustness of the system; and subsequently, acquiring an endogenous respiratory ratio RI, so as to judge whether system microorganisms are impacted or not. The method provided by the invention is conducive to risk assessment and risk control of the sludge disposal plant; the method can optimize running of the sludge disposal plant; and the method has a certain guiding significance for operation management of the sludge disposal plant.

Description

technical field [0001] The invention belongs to the field of sewage treatment and relates to an innovative method for evaluating the robustness of an activated sludge system from the perspective of the strengthening effect of calcium on microorganisms. Background technique [0002] In the operation of actual sewage plants, environmental disturbances are ubiquitous and inevitable, including temperature, DO, water quality, water quantity, etc. Therefore, the physiological characteristics of microorganisms will change with the change of living environment. For environmental disturbances, the system senses and behaves differently. Some systems are sensitive and fragile; while some systems are not affected and can maintain their system performance. However, these two different system performances have not attracted much attention at present. Instead, people seem to focus more on the stability of the system. Here, the sensitivity and vulnerability of the system are defined as r...

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Problems solved by technology

[0003] However, so far, there is no good way to describe this robustness except directly measuring various indicators, and there is no way to judge the type of impact. It is a technical problem to be solved urgently in this field to propose a new method to provide guidance for the operation of sewage treatment plants.

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