Hotel sewage Hotel catering wastewater is mainly a mixture of various kinds of wastewater generated in the business process, including swill and swill generated in the process of washing vegetables, washing rice, cooking rice and washing dishes and chopsticks. Catering wastewater has complex components, low PH, high SS, high turbidity and high organic content, mainly including food fiber, starch, fat, animal and vegetable oils, various seasonings, detergents and protein. Due to the particularity of its water quality, the treatment methods of hotel restaurant wastewater are generally divided into two stages: pretreatment and treatment, which need to be disinfected before discharge. Through pretreatment, the sewage can be intercepted for impurities, and for oily substances, it can be treated by inclined tube grease trap or air flotation equipment. The treat sewage enters that biological reaction tank of domestic sewage treatment equipment, and undergo anaerobic anoxia and microbial decomposition. Effectively remove organic matter and substances such as nitrogen and phosphorus. Centralized collection of disinfection discharge.