An external sewage treatment device

Abstract

The invention relates to a sewage treatment unit which comprises at least one basic filtering module, wherein the basic filtering module comprises filtering units, each filtering unit comprises a plurality of ceramic filtering plates and an outer frame for mounting the ceramic filtering plates, each ceramic filtering plate is fixed on the outer frame through two end parts, a plurality of through holes are formed in the ceramic filtering plate and are communicated with at least one end face of the ceramic filtering plate, the outer frame is provided with a pure water containing cavity which is communicated with the through holes, a pure water collecting pipe is further arranged to be communicated with the pure water containing cavity, the basic filtering module further comprises an upper end cover and a lower end cover which are coated with the outer frame of the filtering unit, a sewage containing cavity is formed among the upper end cover, the outer frame and the lower end cover, a back wash water inlet is formed in the upper end cover, and a sewage inlet is formed in the lower end cover. According to the external sewage treatment unit, the sewage treatment process is simple, and the conventional sewage treatment technique is greatly improved.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to an external sewage treatment equipment. Background technique [0002] The modern sewage treatment process is usually divided into three-stage treatment process, among which the first-stage treatment (physical treatment) will pass the raw sewage through the coarse screen after being lifted by the sewage lift pump, pass through the screen or sand filter, and then enter the grit chamber, and then put it into the grit chamber. The sewage separated from sand and water is introduced into the primary sedimentation tank; the secondary treatment includes allowing the effluent of the primary sedimentation tank to enter the biological treatment equipment. At this stage, there are usually activated sludge method and biofilm method, (the reactor of the activated sludge method has Aeration tank, oxidation ditch, etc. Biofilm method includes biofilter, biological turntable, biological contact oxi...

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Problems solved by technology

[0003] Although the above-mentioned method can effectively treat sewage, the problem with this method is that each of the above-mentioned treatment processes needs to be provided with a corresponding treatment pool, and for large-scale sewage treatment, such a treatment pool occupies a large area, which has become more and more difficult. More and more increasingly tense land resources have brought huge pressure and gradually become the bottleneck of the water treatment industry, but the industry has not had a good way to solve the above problems before

[0004] The inventor of this application submitted the application number 201110407671.6 on December 8, 2011, which is a Chinese invention patent named a water treatment device based on a cermet filter plate, which discloses a water treatment based on a cermet filter plate The device can be used for sewage treatment conveniently and quickly, but the device needs to be placed in the sewage pool as a whole, and it is difficult to avoid dirt such as mud and sand on the surface of the ceramic filter plate during use, which will affect the filtration efficiency.

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