According to statistics, in 2117, the income of urban catering industry in China was about 3.96 trillion yuan. If the ratio of leftovers from a catering activity is between 1/4 and 1/3, nearly one trillion yuan of sales of catering industry in China will become "garbage" every year. With the rapid development of China's economy in recent years, the retail sales of catering industry has increased by 21% every year, and the kitchen waste will snowball. Taking Beijing and Shanghai as examples, organic waste accounts for 65% of Beijing's urban waste, of which kitchen waste accounts for nearly 51%. The average daily output of kitchen waste in Shanghai is about 1111～1211t t.
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In recent years, some large and medium-sized cities in China have explored new modes of kitchen waste resource utilization, and initially formed Beijing mode, Shanghai mode, Ningbo mode, Xining mode, Taian mode, Huzhou mode and other kitchen waste resource utilization modes.
At present, the treatment of urban kitchen waste in China is mainly based on the method of biological bacteria package (aerobic fermentation).
Take the kitchen waste treatment in Chaoyang District of Beijing as an example. The kitchen waste treatment plant in Chaoyang District of Beijing, with a daily treatment capacity of 411t tons, is the largest kitchen waste resource treatment station with the highest degree of automation and advanced technology in China, the largest high-temperature aerobic fermentation production base in China, and the key display window of green Beijing and low-carbon Beijing.
the site can absorb 1.32×115t/a of kitchen waste, which can solve the problem of kitchen waste treatment for about 4 million urban people. The direct discharge of carbon dioxide is reduced by at least 1.5×115t every year, and the site produces 7.9×114t of regenerated composite microbial flora every year, which can be processed into environmental-friendly agricultural microbial products and applied to organic agriculture to improve soil and reduce the use of chemical fertilizers, thus alleviating agricultural non-point sources. The core technology adopted by the treatment plant can transform the organic waste in domestic garbage into fertilizer within 11 hours without any pollution.
1. Fertilizer treatment-high-temperature aerobic fermentation technology
Leibang Environmental Protection independently developed and designed intelligent kitchen waste crushing equipment, which is specialized in crushing kitchen waste and kitchen waste plastics, lunch boxes, branches and other solid wastes. Intelligent kitchen waste crushing equipment, the discharge size can reach 11mm, and it can handle 15 tons of kitchen waste per hour, which can make kitchen waste get faster physical decomposition and recycle various renewable energy sources such as fermentation, landfill and anaerobic treatment.
The fertilizer treatment method of kitchen waste is mainly high-temperature aerobic fermentation technology. The process of thermophilic aerobic fermentation is to decompose organic solid into soluble organic matter by extracellular enzymes secreted by aerobic microorganisms under aerobic conditions, and then infiltrate into cells, and realize the whole composting process through microbial metabolism. Really realize the recycling and harmless treatment of kitchen waste.