For a long time, many countries and regions have faced problems such as incomplete diversion of rainwater and sewage, serious leakage of municipal sewage in the dry season, and difficulty in controlling non-point source pollution in the rainy season, which have brought great hidden dangers to the local water environment. Especially in Southeast Asia, which is densely populated and developing rapidly. For example, Ho Chi Minh City and Hanoi City in Vietnam.
 

In some areas, there is a gap of at least hundreds of thousands of cubic meters of sewage treatment every day. However, the construction of drainage pipe networks is expensive and takes a long time. It is very expensive to transport this sewage to existing sewage treatment plants.
 

Generally speaking, before the runoff pollution enters the river, people will use a storage tank for simple pretreatment to simply treat some sediment and suspended particles. However, the treated water still brings a lot of sewage into the water body, especially in ecologically sensitive areas where surface water is used as a source of drinking water. This is a very big safety hazard.

The easier way is to build a sewage treatment station near the storage tank to treat the water after storage. But in my case, what we must consider is which process can be used to face such a large water impact load. Because under normal circumstances, this sewage treatment station needs to treat domestic sewage during the dry season, and treat rainwater and domestic sewage during the rainy season. Therefore, the requirements for floor space and water quality and water quantity change coefficient are relatively high. The MBR membrane process occupies a small area. The amount of water in the dry season and the rainy season can more than double, but the existing MBR membrane technology cannot meet this demand economically. In other words, if the MBR membrane process is designed according to the treatment capacity in the dry season, it cannot process sewage more than twice its treatment capacity in the rainy season. If the process is designed based on the processing capacity during the rainy season, MBR will cost at least twice the investment.
 

Fortunately, the RPIR rapid biochemical sewage treatment technology and process independently developed by Qingyan Environment could solve this problem very well. First of all, the RPIR process is a biochemical process, which is relatively economical and does not require a secondary sedimentation tank. It can save about 40% of the floor space of the biochemical part. Secondly, the water resistance change coefficient of the RPIR process can reach more than 2 times, which can effectively solve the problem of drastic changes in water volume in the dry season and rainy season. Finally, the sewage treatment station with RPIR technology as the core can be built on the top of the regulating tank without occupying other unnecessary areas. The water output effect is very stable and can meet various standards of different countries.


 

Qingyan Environment calls this treatment model as  "regulating storage tank + municipal sewage linkage treatment". At present, this model has developed rapidly in Shenzhen City, China. At present, very famous cases have been built - the case of Guanlan River water storage tank + municipal sewage linkage standard improvement and the case of Baihua River water transfer tank + municipal linkage treatment, which have received great attention and praise from the Chinese government.
 

If you have similar needs, you can contact Tsinghuan Environment. Our website is https://tsinghuan.world/.