According to statistics, in 20 17, the income of urban catering industry in China was about 3.96 trillion yuan. If the ratio of leftovers in a catering activity is between 1/4 and 1/3, nearly one trillion yuan of sales in China catering industry will become "garbage" every year. With the rapid development of China's economy in recent years, the retail sales of catering industry is increasing at the rate of 2 1% every year, and the kitchen waste will snowball. Taking Beijing and Shanghai as examples, organic waste accounts for 65% of Beijing's municipal waste, of which kitchen waste accounts for nearly 50%. The average daily output of kitchen waste in Shanghai is about1000 ~1200 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 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 processing capacity of 400 tons, is the largest, most automated and technologically advanced kitchen waste resource treatment station 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 kitchen waste 1.32× 105t/a, which can solve the problem of kitchen waste treatment for about 4 million urban people. The annual direct emission of carbon dioxide is reduced by at least 1.5× 105t, and the site produces 7.9× 104t of regenerated composite microbial flora. It can be processed into environment-friendly agricultural microbial products, which can be applied to organic agriculture, improve soil and reduce the use of chemical fertilizers, thus alleviating agricultural non-point source pollution and reducing carbon dioxide emissions by 7.5× 105t every year. The core technology adopted by this treatment plant can transform the organic waste in domestic garbage into fertilizer within 10h without any pollution.

First, fertilizer treatment-high temperature aerobic fermentation technology

Leibang Environmental Protection independently developed and designed intelligent kitchen waste crushing equipment, specializing in crushing kitchen waste and solid waste such as kitchen waste plastics, lunch boxes and branches. Intelligent kitchen waste crushing equipment, the discharging granularity can reach 10mm, and it can treat kitchen waste 15 tons per hour, which can make kitchen waste get faster physical decomposition and recover 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 that extracellular enzymes secreted by aerobic microorganisms decompose organic solids into soluble organic substances, and then penetrate into cells, and the whole composting process is realized through microbial metabolism. Really realize the recycling and harmless treatment of kitchen waste.