The resource utilization after the sludge has been paid more and more attention as people pay more attention to sustainable economic development. In recent years, with the development of China’s economy and the continuous advancement of urbanization, urban sludge production has gradually increased. The traditional methods are sludge landfill, sludge farming and sludge incineration. After the sludge is landfilled, it will cause certain environmental problems. In order to meet the three principles of “harmlessness”, “reduction”, “resources” and “reduction” of sludge treatment, sludge carbonization treatment technology is adopted to fully realize the resource utilization of sludge.
The key to the research on sludge resource utilization is to be harmless and stabilized.
The sludge carbonization process can recover about 80% of the organic energy in the sludge, and produce biochar with ordinary use. Compared with other technologies on the market, it realizes the resource utilization of sludge, which is a veritable waste turning into treasure. The main use value of the final product is mainly reflected in: 1 floor tiles, trays and other general construction raw materials; 2 can be used as green fuel, which can be used for heating of the system itself, coal-fired thermal power plants, waste incineration plants, etc.; The land compaction problem helps the salt-alkali land to quickly recover into a good field; 4 new adsorption material – activated carbon, fast adsorption speed, outstanding adsorption balance; 5 parts of sludge production can be used for snow melting agent, auxiliary road cleaning; 6 straw can be used as paper pulp ; 7 kitchen waste can be used as high-value biomass charcoal.
The sludge low-temperature treatment technology can not only solve the adverse effects of sludge on the environment, but also solve the problem of sludge land occupation, and turn waste into treasure, which is more in line with the ecological sustainable development strategy!