Complex biological filter for synchronously treating sewage and off odor

Abstract

For a long time, sewage plants are troubled by the problems of large energy consumption, high operating cost, foul odor generation and the like. Therefore, the invention provides a complex biological filter which can make use of a microbial metabolism to synchronously treating sewage and off odor, and comprises the following characteristics of: greatly saving aeration energy consumption and reducing the operating cost by supplying oxygen in a trickling filtration mode; forming an aerobic section and an anoxic section in the same biological filter by optimizing the structure of the biological filter, and supplementing a carbon source through water inflow distribution to ensure that the removal efficiency of total nitrogen is improved; improving the removal efficiency of total phosphorus in the sewage through enhanced phosphorus removal of a filling material; and saving a secondary sedimentation tank because the upper part of the complex biological filter generates a small amount of excess sludge and the anoxic section on the lower part can further perform filtration and interception.

Description

Technical field: [0001] The patent of the invention belongs to the technical field of environmental protection equipment and relates to an improvement of sewage treatment process equipment. Background technique: [0002] Wastewater treatment is an energy-intensive integrated technology. For a long time, problems such as high energy consumption and high operating costs have seriously hindered the construction and operation of urban sewage plants in my country. The energy consumption of urban sewage treatment plants in my country is mainly used for sewage biological treatment and sludge treatment units, accounting for more than 60% of the direct operating costs of sewage plants. Among them, the energy consumption of sewage biological treatment is mainly concentrated in the blower room for oxygen supply of secondary treatment. It accounts for more than 70% of the energy consumption of the whole plant. Therefore, the research on biological treatment technology with low aeration...

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Problems solved by technology

[0003] In addition, sewage treatment plants also have "exhaust gas" problems, that is, sewage treatment structures, especially the problem of foul smell emitted by sludge treatment units, and the problem of dioxin air pollution caused by sludge incineration treatment

Many urban sewage treatment plants are adjacent to residential areas. Because the design of these treatment plants is limited to water purification and neglects the control of air pollution, the surrounding living environment has seriously deteriorated. Measures should be taken as soon as possible to reduce the impact of sewage plants' odor and toxic gases. Environmental pollution, and its corresponding technical measures are still being researched and explored

[0004] At the same time, the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" GB18918-2002 has more stringent regulations on the discharge of nitrogen and phosphorus, especially the control of total nitrogen indicators added to the ammonia nitrogen indicators. The simultaneous nitrogen and phosphorus removal effects of sewage biological treatment are mostly unstable, and the guarantee rate is low, which still needs to be further improved

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