What are the factors that affect the microbial activity of sewage treatment-Ocpuritech-img

What are the factors that affect the microbial activity of sewage treatment?

by:Ocpuritech     2021-04-07
What are the factors that affect the microbial activity of sewage treatment? Author of the article: the sewage treatment process need to use microorganisms, but in the biological wastewater treatment process, microbial activity will be affected by factors affecting microbial activity can be divided into categories and environmental matrix type two categories. The following editor will introduce the factors that affect the microbial activity of sewage treatment. The matrix category includes nutrients, such as carbon-based organic compounds, namely carbon source materials, nitrogen sources, phosphorus sources and other nutrients, as well as trace elements such as iron, zinc, and manganese; in addition, it also includes some toxic and harmful chemicals such as phenol It also includes some heavy metal ions such as copper, cadmium, and lead ions. Environmental factors mainly include:   1, temperature. The influence of temperature on microorganisms is very extensive. Although certain types of bacteria are active in high temperature environment (50℃~70℃) and low temperature environment (-5~0℃), most microorganisms are the most active in sewage treatment. The suitable temperature range for growth is 20-30°C. In a suitable temperature range, the physiological activity of microorganisms is vigorous, and its activity increases with the increase of temperature, and the treatment effect is better. Beyond this range, the activity of microorganisms will deteriorate, and the biological reaction process will be affected. Generally, the maximum and minimum limits for controlling the progress of the reaction are 35°C and 10°C, respectively.  2, PH value. The most suitable pH range of activated sludge system microorganisms is 6.5-8.5. The acidic or alkaline environment is not conducive to the survival and growth of microorganisms. In severe cases, the sludge flocs will be destroyed and the bacterial micelles will be disintegrated. The treatment effect deteriorated sharply.   3. Dissolved oxygen. For aerobic biological reactions, it is important to maintain a certain concentration of dissolved oxygen in the mixed solution. When the dissolved oxygen in the environment is higher than 0.3mg/l, both facultative bacteria and aerobic bacteria carry out aerobic respiration; when the dissolved oxygen is lower than 0.2-0.3mg/l and is close to zero, the facultative bacteria turn into anaerobic respiration. Oxygen respiration, most aerobic bacteria basically stop respiration, and some aerobic bacteria (mostly filamentous bacteria) may also grow well, and often cause sludge expansion after occupying an advantage in the system. Generally, the dissolved oxygen at the outlet of the aeration tank should be kept at about 2mg/l. If it is too high, energy consumption will be increased, which is not economical. This is the introduction of the factors that affect the microbial activity of sewage treatment. Among all the influencing factors, matrix factors and PH value are determined by the quality of the influent water. The control of these factors mainly depends on daily monitoring and related regulations, Strict enforcement of laws and regulations. You can also learn about the applications of microorganisms in sewage treatment, and understand how microorganisms treat sewage.
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