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Membrane Process Treatment of Leachate Heilongjiang Hegang Municipal Solid Waste Landfill to be put into use
Release time:
2015-01-19
According to the Northeast Net Hegang, January 19, 2015, the reporter learned from the Environmental Sanitation Department of the Municipal Urban Management Bureau that after two years of intensive construction, the city's domestic waste treatment plant has now come to an end and will soon be put into use.
It is understood that at present, the city produces more than 1000 tons of domestic waste per day, all of which are treated by simple landfill. The collected garbage is directly poured into the abandoned open pit without treatment, resulting in serious pollution of groundwater, urban air and surrounding soil by leachate and fermentation gas in the garbage, affecting the normal life and work of nearby residents and units, endangering the health of citizens, and also having potential safety hazards. At the same time, also let the city face the "garbage siege" dilemma. The introduction of modern municipal solid waste disposal methods is an effective way to solve these problems. At the same time, the Ministry of Housing and Urban-Rural Development has also issued relevant requirements for the harmless treatment of urban waste in recent years, that is, by 2015, the harmless treatment rate of urban domestic waste in the country should reach more than 80%, and a sound supervision system and mechanism for urban domestic waste treatment should be established.
The municipal Party committee and the municipal government attach great importance to the treatment of municipal solid waste. Since 2008, this work has been listed as one of the important livelihood projects. It is planned to build a domestic waste treatment plant in our city and report it to the relevant provincial departments for project approval. After preliminary site selection, environmental assessment, land acquisition, technical research, fund-raising and more than two years of construction, the project has reached a rough scale and will soon be put into use.
The project site is located at the connection of Nanshan Forest Farm on the west side of Heyi Highway, 20 kilometers away from the city center. The total investment of the project is 167.08 million yuan, covering an area of 24.7 hectares, and a total storage capacity of 5.39 million cubic meters. The construction scale is 950 tons of domestic waste per day. The period is 10 years, and the vegetation will be restored after 10 years. After the completion of the waste treatment plant, the new anaerobic sanitary landfill method will be adopted, the bottom layer will use the double-layer artificial composite anti-seepage process of high-density polyethylene geomembrane, the landfill leachate collection system will be set on the anti-seepage system of the landfill site, the leachate will be treated with raw water tank and acid filtration pretreatment and two-stage reverse osmosis treatment process, which will be discharged after reaching the national standards, thus solving the problem of landfill leachate pollution of groundwater pollution; the waste gas produced by landfill is used to establish a guide and discharge recycling system and carry out terminal treatment, which solves the problem of air pollution by waste fermentation gas. The project includes the construction of waste collection and transportation system, sanitary landfill area, leachate treatment station, management area and related public facilities and related equipment. By the end of December 2014, the project had completed 255000 cubic meters of garbage dump dam, more than 1000 cubic meters of percolation night drainage system, more than 122000 cubic meters of groundwater drainage system, more than 17700 cubic meters of earthwork in flood intercepting ditch, 630000 square meters of geotextile, 420000 square meters of geomembrane, 354000 cubic meters of impermeable yellow clay and 354000 cubic meters of compacted impermeable yellow clay. The landfill drainage system, anti-seepage system, regulating pond, flood intercepting ditch, comprehensive office building, leachate treatment workshop and equipment installation have been completed. After the domestic waste treatment project is put into use, it will produce good social and environmental benefits, and will play a significant role in improving the urban ecological environment of our city.
"Hegang Daily" reporter Sun Pengfei
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