Sludge treatment device

Abstract

The invention discloses a sludge treatment device, which comprises a sludge treater main body, a stirring motor, a stirring shaft and a spiral blade, wherein a sludge inlet and a sludge outlet are respectively formed in the two ends of the sludge treater main body, the stirring motor is arranged on the outer side of the sludge treater main body and is connected with the stirring shaft in the sludge treater main body, the spiral blade is arranged on the stirring shaft, the sludge treater main body is of a circular-truncated-cone barrel-shaped structure, and the cross section of the sludge treater main body gradually decreases in the direction from the sludge inlet side to the sludge outlet side. In a process that sludge goes forwards in the sludge treater main body, extremely-large pressureis generated in the sludge treater main body, and the volume of the sludge gradually decreases; as the gas density is far smaller than the sludge floc density, gas is exhausted to an aerobic tank from an overflowing opening, a degassing process is achieved, an oxygen poor environment of an anoxic tank is ensured, sludge settleability is improved, sludge swelling and floating and foam generation are controlled, and effluent quality is optimized.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a sludge treatment device. Background technique [0002] With the acceleration of urban development and industrialization, sewage treatment has become a hot environmental issue that people focus on. Sewage discharged from industrial production such as pharmaceuticals, landfill leachate, chemical fertilizers, chemicals, aquaculture, and food has the characteristics of high COD and high ammonia nitrogen, and it is difficult to treat, especially the problem of difficult discharge of ammonia nitrogen. The treatment of ammonia-nitrogen-containing organic wastewater mainly adopts the anoxic / aerobic biochemical process (A / O process), and uses the principle of nitrification / denitrification for simultaneous decarbonization (COD) and denitrification. [0003] Due to the unsound sewage collection facilities in our country, the rainwater and the sewage discharged from industrial pr...

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Problems solved by technology

[0003] Due to the unsound sewage collection facilities in our country, the rainwater and the sewage discharged from industrial production merge into the drainage system, resulting in the low C / N ratio of the influent water quality of the sewage discharged from industrial production in my country. When the minimum value is reached, incomplete denitrification reaction will occur, which will affect the efficiency of nitrogen and phosphorus removal

Moreover, due to excessive aeration, surfactant action or denitrification reaction, micro-bubbles are generated, which reduces the density of the sludge, causing the sludge to float and generate foam, which affects the sedimentation and biochemical performance of the sludge. Therefore, it is necessary to use physical, Chemical and other methods reduce the formation of foam, but there are problems such as secondary pollution, unstable operation, and high operating costs

On the other hand, there are a large number of toxic and refractory pollutants in the sewage, which are wrapped on the surface of activated sludge flocs for a long time and cannot be degraded or detached, resulting in mass transfer obstruction, resulting in nitrifying or denitrifying bacteria not being able to obtain nutrient supply in time and causing bacterial biochemical performance. become worse

In addition to the problems of hindered sludge mass transfer and low nitrogen removal efficiency, problems such as large surplus sludge production and difficulty in resource treatment are also major problems faced by existing sewage treatment

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