Reverse osmosis membrane pulse sewage discharge method

Abstract

The invention relates to the technical field of sewage treatment, in particular to a reverse osmosis membrane pulse sewage discharge method. The reverse osmosis membrane pulse sewage discharge method comprises the following steps of: (1) filtering sewage by using a filter; and (2) further filtering the sewage through reverse osmosis membrane pulse sewage discharge and performing pulse treatment simultaneously, wherein the pH value of the sewage is controlled to be between 3 and 9, and the environment temperature of the sewage treatment is controlled to be lower than 50 DEG C. The reverse osmosis membrane pulse sewage discharge method is good in treatment effect, energy-saving and environment-friendly, water is discharged continuously and can be directly recycled, and direct cost of treatment is lower than that of tap water.

Description

technical field [0001] The invention relates to the technical field of sewage treatment and direct reuse, in particular to a reverse osmosis membrane pulse sewage discharge method. Background technique [0002] The current physical treatment method is generally best to use filter membrane for filtration. The process of existing industrial sewage reuse treatment technology is generally: multi-media filter → bag filter → ultrafiltration → security filter → reverse osmosis membrane → effluent, However, the reverse osmosis membrane is easily blocked after a period of filtration, which affects the effect and speed of the filtration, resulting in that the discharged sewage cannot be treated in time. The existing method to solve the above problems is to reverse the reverse osmosis membrane after filtering for a period of time. Flushing → neutralization → cleaning treatment to solve the problem of blockage, such operation steps must stop the sewage treatment, so the time required fo...

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Problems solved by technology

[0002] The current physical treatment method is generally best to use filter membrane for filtration. The process of existing industrial sewage reuse treatment technology is generally: multi-media filter → bag filter → ultrafiltration → security filter → reverse osmosis membrane → effluent, However, the reverse osmosis membrane is easily blocked after a period of filtration, which affects the effect and speed of the filtration, resulting in that the discharged sewage cannot be treated in time. The existing method to solve the above problems is to reverse the reverse osmosis membrane after filtering for a period of time. Flushing → neutralization → cleaning treatment to solve the problem of blockage, such operation steps must stop the sewage treatment, so the time required for the intermittent sewage treatment process to treat the same sewage is relatively long, so the sewage treatment process The efficiency is not high, and it also increases the workload of workers to clean the filter membrane, the process is complicated, the cost is high, and the water output is small

[0003] Under normal circumstances, the COD measured from the sewage outlet will increase by 3 times after 1 minute, and the COD measured after 5 minutes will be between 3000-5000COD, and the water output will gradually decrease, which will obviously affect the efficiency of sewage treatment, and the sewage treatment effect not good

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