What Is The Effect Of Draining Food Waste At The Source?

In 2000, China began to carry out domestic waste classification and collection pilots in eight cities, including Beijing, Shanghai, Nanjing, and Hangzhou. Although some progress has been made, in general, the classification accuracy of domestic waste, the actual reduction effect and the level of resource recovery and utilization Are far worse than expected. Due to the impact of the lives and dietary habits of Chinese residents, a large amount of food waste material has entered domestic garbage. In addition, the waste recycling system with "scavengers" as the main body has a higher recycling rate of high-value components such as waste plastic, waste paper and waste metal High, making kitchen waste components account for more than 60% of domestic waste. China's municipal solid waste has a high water content, low calorific value, and is easily biodegradable, which seriously affects the improvement of the operating efficiency and pollution control level of the collection and transportation system and treatment facilities. Based on this background, the separate collection of kitchen waste has become the focus of domestic waste separation and collection in major cities in China.

In recent years, Hangzhou, Shanghai, Qingdao and other cities have successively carried out pilot work on dry and wet separation of domestic waste in residential areas, but there is still lack of relevant research and practice on measures to reduce water and improve quality at the household level. The moisture content of kitchen waste is as high as 80%. By draining water from the source to reduce the moisture content of kitchen waste, the overall calorific value can be significantly reduced while reducing the quality of domestic waste. It is important to improve the level of domestic waste management and treatment efficiency by implementing source drainage and selective quality collection in residential households, investigating the changes in the amount and physical and chemical characteristics of domestic waste, and analyzing the effects of weight reduction and quality improvement.

Solid waste treatment facilities are relatively complete. Landfill sites, incineration plants, and kitchen waste anaerobic digestion plants are also established. Special renewable resources and hazardous waste recovery units have been established. In communities with good drainage conditions, install kitchen waste pulverizers for some households, and crush the kitchen waste into the sewage treatment system. Other residents need to dispose of kitchen waste with a high moisture content, such as leftovers, leftovers, washed leaves, and tea residues, etc. I trash can. In the initial period, there is less kitchen waste collected separately, and it is still mixed with other wastes and then incinerated. The focus is on the reduction and quality improvement of drainage measures at the source.