Integrated sewage treatment equipment plays an important role in the treatment of domestic sewage in rural areas, scenic spots, homestays, etc. Although the water quality in some projects reaches the standard, the odor is unacceptable. The reasons why sewage stinks are as follows:

1. Most of the processes of integrated sewage treatment equipment adopt biological treatment process, which accelerates the growth and reproduction of microorganisms, but the activities of these microorganisms also increase the generation of odor. Biological treatment equipment needs continuous aeration, and once the equipment is poorly sealed, odor will naturally overflow.

2. Domestic sewage is mixed with feces and many sundries, so the original smell is unpleasant. In the case of high temperature in summer, domestic sewage treatment equipment increases the output of odor, and sulfate is reduced to the odor generated by hydrogen sulfide under the action of anaerobic bacteria.