Block drains and sewers. The advantages of using the kitchen waste (crushing) processor are as follows: 1. For residents: ① reduce the odor in the kitchen, especially the cabinets for storing trash cans; (2) reduce the possibility of breeding cockroaches and bacteria; (3) It is convenient for cleaning and discharging domestic garbage; ④ It is beneficial to keep the sanitary environment of stairwells and residential quarters. 2. For sanitation department and property management: ① improve the working environment of sanitation; (2) Effectively reduce the garbage output; ③ Reduce the secondary pollution in the process of garbage collection and transportation; ④ Reduce the difficulty and cost of garbage collection and transportation (this is particularly important). 3. For municipal and traffic control departments: ① Increasing the content of Corruptible organics in sewage is beneficial to the biochemical process of sewage treatment plants; (2) Reduce the number of garbage trucks and reduce the pollution of garbage and sewage dripping on the road. 4. For environment and resource recovery: ① reduce the pollution of kitchen waste to recyclable materials and improve the resource recovery rate; ② Improve the treatment conditions of landfills and incinerators, and reduce the emissions of pollutants such as leachate, biogas and flue gas. The disadvantages of using the processor are: residents will increase some water and electricity costs; The cleaning of sewage pipe network may increase after universal application; It is necessary to gradually adjust the treatment process of sewage treatment plants. Organized by China Environmental Sanitation Association, leaders from Beijing and Ningxia gathered in Ningbo to discuss the treatment of urban kitchen waste. Ningbo Kaicheng Ecological Technology Co., Ltd., as a representative of the physical and biological treatment technology model of kitchen waste, made a typical introduction.
The meeting revealed that there are nearly 3.5 million hotels and restaurants in China, and the amount of kitchen waste generated every day is staggering. However, there are few engineering examples of large-scale application of kitchen waste treatment in China, mainly concentrated in Beijing, Shanghai and Nanjing.
In cities such as Bo and Xining, the main technologies used are anaerobic digestion, microbial resource recycling, feed treatment and physical biological treatment, among which the physical biological treatment technology is represented by the "open and honest" harmless disposal and resource utilization of kitchen waste. Kaicheng, a set of kitchen waste treatment equipment with independent intellectual property rights, has changed people's traditional concept of kitchen waste through solid-liquid separation, mechanical separation, magnetic separation, crushing, protein flocculation, three-phase separation and biological fermentation, and achieved the development goal of circular economy. As the only kitchen waste disposal enterprise designated by the municipal government, it has created remarkable social, economic and environmental benefits.
Through comprehensive analysis and research, Professor Wang Lili of China Urban Architecture Research Institute believes that the "integrity" kitchen waste treatment technology has reached the requirements of "harmlessness, reduction and resource utilization", with mature technology, high comprehensive utilization rate of resources, up-to-standard discharge, long operation life and moderate project investment, which is suitable for centralized large-scale treatment of kitchen waste.