Sichuan Zigong cause high pressure vessels limited liability company the news: 76 million yuan investment in the chemical process sludge methane project has entered the late finishing work is expected to be completed and commissioned in August this year, when Nissan 15,000 cubic meters of natural gas. This is the first sludge methanation project in Sichuan Province.
The project was listed as one of the 100 provincial-level strategic emerging industries in November last year. It uses sewage treatment plants and other sludge as raw materials, uses the principle of anaerobic reaction of organic matter, and adopts special processes to maintain high concentrations of active organisms. The anaerobic digestion of the organic matter in the sludge is highly efficient and stable. This step allows more than 50% of the organic matter in the sludge to be converted into gas, and the proportion of methane can reach 80%. After the purification process, the methane content in the gas can reach more than 95%, while the carbon dioxide content is less than 3%. The gas composition and calorific value have completely complied with the natural gas standards for vehicles.
With the assistance of Sichuan University, Southwest Jiaotong University and other institutions and research institutes, after more than three years of exploration, the large-scale, high-capacity sludge methanation process has reached the world's advanced level and has been granted a patent for invention by the State Patent Office.
It is understood that as of the end of 2010, China has built 2,832 urban sewage treatment plants with a treatment capacity of 125 million cubic meters per day, generating 30 million tons of sludge annually (with a water content of 80%) and increasing at a rate of 15%. These sludges contain large amounts of organic matter, heavy metals, and bacteria. If they are left untreated or left untreated, they will cause serious secondary pollution to the environment. Sludge methanation project can solve this problem and truly turn waste into treasure. After anaerobic reaction and purification, the sludge will not only not pollute the environment, but because it contains a lot of organic matter, it can be used for recultivation and soil reconstitution.
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