Low-energy consumption urban sewage treatment system

Abstract

The invention discloses a low-energy consumption urban sewage treatment system. The low-energy consumption urban sewage treatment system comprises an MO-BAF reactor, a BTF reactor, a multi-medium filter and a clear water tank which are sequentially connected through pipes, wherein the MO-BAF reactor, the BTF reactor and the multi-medium filter are all externally connected with a backwashing pump; the MO-BAF reactor and the BTF reactor are further externally connected with a backwashing fan and an oxygen blower; the MO-BAF reactor is sewage treatment equipment applying a micro-oxygenation technology to BAF. The sewage treatment system has a smaller aeration than that in the conventional process, and is low in energy consumption, good and stable effluent water quality, good in nitrogen and phosphorus removing effect and small in oxygen and carbon source demand.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a low energy consumption urban sewage treatment system. Background technique [0002] Biological aerated filter, referred to as BAF, is a new type of biofilm sewage treatment process developed in Europe and the United States in the late 1980s. Nitrogen and phosphorus removal. Biological aerated filter is currently widely used in small-scale domestic sewage treatment, and the effluent after treatment usually reaches the first-class B standard. The biological aerated filter process has the following disadvantages: 1. The backwash of the biological aerated filter is one of the key factors determining the operation of the filter. If the filter material is not flushed sufficiently, clumping may occur, resulting in failure of the process during operation. . During operation, backwash effluent flows back into the primary settling tank, which has a large impact lo...

AI Technical Summary

Problems solved by technology

The biological aerated filter process has the following disadvantages: 1. The backwash of the biological aerated filter is one of the key factors determining the operation of the filter. If the filter material is not flushed sufficiently, clumping and clogging may occur, resulting in failure of the process during operation.

During operation, the backwash effluent flows back into the primary sedimentation tank, which has a large impact load on the primary sedimentation tank. In addition, improper design or operation management will cause problems such as filter material loss with water; 2. The biological aerated filter process is aimed at the poor Raising organic wastewater may cause excessive loss of carbon source due to insufficient nutrition and excessive aeration, and the removal rate of N and P is lower; 3. The traditional biological aerated filter has too much loss of the filter layer due to unreasonable selection of filter materials, resulting in backwashing The frequency is too high or the total pressure of the aeration fan is increased, and the energy consumption is relatively high; 4. The operation of the biological aerated filter is disturbed by the filter layer due to aeration, so that it is difficult to guarantee the suspension of effluent or other indicators

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