Solid Waste Treatment
Other Organic Waste
In addition to municipal organic waste, Purac had rich experience in the treatment of agricultural and industrial organic waste. Based on years of design, construction, and operation experience, Purac recommends a variety of organic waste co-digestion anaerobic treatment technology. It is suggested to treat kitchen waste, food waste, sewage sludge, straw, manure, and expired food waste in a centralized and unified manner. This can not only exert the economies of scale of the treatment facilities but also help to achieve a balanced nutrition of the fermentation substrate, increase the methane yield of anaerobic co-digestion, and improve the output of green energy.
In 2012, Purac signed a contract for the engineering design of a 500-ton/day anaerobic treatment project of mixed organic waste for vehicle fuel gas in Haikou, Hainan. The project is located in the Lao Cheng Economic Development Zone, Chengmai County, covering an area of 50 acres. It treats a total of 500 tons of organic waste such as municipal sludge, pig manure, banana straw, and kitchen waste every day. The project process adopts a co-digestion anaerobic digestion process, and the biogas produced is purified into natural gas for use as vehicle fuel. It produces 20,000 m3 of vehicle fuel gas per day, which can meet the fuel needs of 250 buses or 1,000 taxis. The residue is dried and reduced in volume and used as fertilizer. The project was completed and put into operation at the beginning of 2014, supplying gas to buses and taxis in Haikou. The signing of the contract for the Haikou mixed organic waste anaerobic treatment vehicle fuel gas project has far-reaching significance, in the next ten years, Hainan will use this demonstration project as a blueprint to build 18-20 vehicle fuel gas projects, with a daily treatment of 13,500 tons of mixed organic waste, and a daily production of 540,000 m3 of vehicle fuel gas, which can meet the gas needs of at least 200,000 vehicles, and fully implement a clean energy transportation system. This project is also one of the key projects for Hainan Island to achieve an international island, a tourist island, and an ecological island.
The execution of mixed organic waste co-treatment project in Haikou, not only enables harmless, reduced, and stabilized of waste but also reduces greenhouse gas emissions, creating good economic benefits. It also makes a good attempt in promoting the treatment of organic solid waste and the development and utilization of biomass energy in China.
In 2012, Purac signed a contract for the engineering design of a 500-ton/day anaerobic treatment project of mixed organic waste for vehicle fuel gas in Haikou, Hainan. The project is located in the Lao Cheng Economic Development Zone, Chengmai County, covering an area of 50 acres. It treats a total of 500 tons of organic waste such as municipal sludge, pig manure, banana straw, and kitchen waste every day. The project process adopts a co-digestion anaerobic digestion process, and the biogas produced is purified into natural gas for use as vehicle fuel. It produces 20,000 m3 of vehicle fuel gas per day, which can meet the fuel needs of 250 buses or 1,000 taxis. The residue is dried and reduced in volume and used as fertilizer. The project was completed and put into operation at the beginning of 2014, supplying gas to buses and taxis in Haikou. The signing of the contract for the Haikou mixed organic waste anaerobic treatment vehicle fuel gas project has far-reaching significance, in the next ten years, Hainan will use this demonstration project as a blueprint to build 18-20 vehicle fuel gas projects, with a daily treatment of 13,500 tons of mixed organic waste, and a daily production of 540,000 m3 of vehicle fuel gas, which can meet the gas needs of at least 200,000 vehicles, and fully implement a clean energy transportation system. This project is also one of the key projects for Hainan Island to achieve an international island, a tourist island, and an ecological island.
The execution of mixed organic waste co-treatment project in Haikou, not only enables harmless, reduced, and stabilized of waste but also reduces greenhouse gas emissions, creating good economic benefits. It also makes a good attempt in promoting the treatment of organic solid waste and the development and utilization of biomass energy in China.
