For different types of sewage tanks, the design schemes of the anti-hanging membrane structure used, the membrane materials used, and the treatment process are different. During the use of the anti-hanging film cap, its calculation of the inlet and outlet air volume will be different. The number of air changes during operation of the operating space is also different. The following editor will explain the difference in air volume calculation with the cover of the grit tank, the cover of the sludge thickening tank, and the cover of the membrane structure of the deodorizing biochemical tank:
1. Reverse hanging film cover for grit tank: mainly the odor caused by lack of oxygen. Generally, the structure or equipment is covered separately. For the space that does not enter the operation, the number of air changes is 2-3 times. For the space that enters the operation, change The gas frequency is 5-8 times, which is not suitable for industrial wastewater with volatile components.
2. The sludge thickening tank is covered to deodorize: it is one of the most important odor sources in the sewage plant. Since most of the sludge thickening tanks have thickening and scraping equipment, try to use lower cover without affecting the operation For collection, the number of air changes is 3-5 times. The dehydration system generally collects sludge separately.
3. The membrane structure of the biochemical pool : for the anoxic part, it is not considered for operation, and the number of air changes is 2-3. For the aerobic part, it is not recommended to collect without special requirements. If it must be collected, follow the exposure The air volume is added to the air volume of the collection space approximately once.
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