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According to the engineering practice of our company's aerated biological filter for many years, it is concluded that among the various influencing factors that affect the operation of the aerated biological filter reactor, the most important ones are: the concentration of the incoming water substrate, nutrients, dissolved oxygen, pH Temperature, toxicity suppression, hydraulic residence time and load rate in the reactor. This article will answer one by one:
进水底物浓度污水中有机物的组分是曝气生物滤池内生物膜微生物食物与能量的主要来源。 (1) Intake substrate concentration Organic components in sewage are the main source of microbial food and energy for biofilms in aerated biological filters. In general, most of the organic and inorganic substances in sewage can be used as nutrition sources for microorganisms. These substances can be used by microorganisms and undergo biochemical transformation under the catalysis of enzymes. They are called substrates. . For the removal of organic pollutants, the substrate is a biodegradable organic matter. The change in the concentration of organic matter in sewage for a long or short period of time can lead to changes in the form of microbial growth. Reactor treatment efficiency and yield of remaining sludge.
溶解氧对于曝气生物滤池反应器来讲,起净化作用的主要是专性好氧微生物及兼性微生物。 (2) For the aerated biological filter reactor, dissolved oxygen is mainly obligate aerobic microorganisms and facultative microorganisms. They grow in aerobic environments with high redox potentials, so that the reactor has enough dissolved oxygen for the aerobic microorganisms' life metabolism. Blower is used to force external air supply (unlike traditional tower filters). This is the required energy consumption in the treatment of sewage by the biological aerated filter process. An aerated biological filter reactor for carbon removal on a daily basis. The effluent dissolved gas is maintained at 2 ~ 3mgL. It is conducive to the growth of the microbial species in the reactor. If the dissolved gas in the reactor towel is insufficient, then the activity of aerobic microorganisms is affected by Liu. When the metabolic capacity is reduced, the growth of microorganisms is disrupted. Aerobic micro-tissues are inhibited and died: if the dissolved oxygen in the reactor is excessive, on the one hand, it is uneconomical and wastes energy, and it is not economical to handle; on the other hand, it will cause excessive microbial activity. The biofilm itself undergoes oxidative decomposition. The utilization rate of oxygen in the aerated biological filter reactor is relatively high, mainly due to the continuous deformation of the air bubbles in the rising process of the filter layer with the size of the gap between the particles, and constantly changing the question. Cut countless times by the filter. The gas-liquid interface is constantly updated. The mass transfer rate of oxygen is accelerated. According to the test. Each additional 1m of filter material layer. Oxygen utilization increased by 1% ~ 2%. The Lichuan rate of oxygen in the aerated biological filter reactor is about twice that of the activated sludge method. For an aerated biological filter that does not consider biological denitrification, its oxygen consumption is 0.5 to 0.8 kg (2 / kg BOD;