Active aluminium oxide static bactericidal filter for waste water treatment and use

Abstract

The present invention relates to bactericidal filter for waste water treatment, and is especially electrostatic active alumina bactericidal filter for treating sewage and its application. The electrostatic active alumina bactericidal filter consists of electrostatic active alumina bactericidal system comprising filtering active alumina layer, filter tank, filter board and filter wall; inverse flushing air-water system; water inlet pH regulating system; alkali washing system and preset chlorine adding system. It has three processes for regenerating and reusing sewage. The present invention has low engineering investment and simple sewage treating process.

Description

technical field [0001] The invention relates to a bacteria-removing filter device for sewage treatment and its application. Background technique [0002] The existing urban sewage recycling water treatment process generally uses the effluent from the secondary sedimentation tank of the sewage treatment plant as the water source, and uses the traditional tap water treatment process, namely flocculation, sedimentation, filtration (quartz sand filtration), and disinfection processes for treatment. The most advanced urban sewage recycling water treatment process is membrane technology, using the effluent of the secondary sedimentation tank of the sewage treatment plant as the water source, and using a microfiltration membrane CMF device with a pore size of ≤0.2 μm for filtration. The total number of bacteria in the effluent of the secondary sedimentation tank of the sewage treatment plant is 10 4 ~10 6 Individuals / mL, the coliform group is 10 5 ~10 7 unit / L, SS≤30mg / L, the e...

AI Technical Summary

Problems solved by technology

The total number of bacteria in the effluent of the secondary sedimentation tank of the sewage treatment plant is 10 4 ~10 6 Individuals / mL, the coliform group is 10 5 ~10 7 unit / L, SS≤30mg / L, the effluent treated by traditional tap water treatment process of flocculation, sedimentation and filtration (quartz sand filtration), turbidity and suspended matter SS can meet the water quality standard for sewage recycling, but the total number of bacteria at 10 2 ~10 3 individual / mL, the coliform group is 10-10 3 per L, need to add chlorine 20-30mg / L, contact time 60min to disinfect, bacteria and coliforms can meet the urban miscellaneous water standard for sewage recycling; when this kind of reclaimed water is used for residents’ miscellaneous water, people’s thinking obstacles are very big, and it is difficult to Accepted; if the reclaimed water needs to be desalinated, the SDI index of the effluent treated by the traditional tap water treatment process is far from meeting the requirements of reverse osmosis RO desalination pretreatment; the reclaimed water is filtered by a microfiltration membrane CMF device with a pore size of ≤0.2μm , the water quality is excellent, people are willing to accept it, and it is the best pretreatment process for RO desalination, but the cost is more than three times higher than the traditional tap water treatment process, and the frequent washing of the membrane, chemical cleaning, regular maintenance and replacement of the membrane will increase Operational complexity and water treatment costs

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