New Idea of Municipal Solid Waste Treatment

摘要

Mixed solid waste in China, with organic compounds no matter easy to hydrolyze or not, need a new way of treatment that is different from the traditional ways such as incineration, landfill and composting. Pretreatment by crushing and classified, wood, plastics, fiber cloth etc., can be separated and generating electricity by pyrolysis, gasification and incineration. The remaining maters can be smashing, pressuring and impinging stream processing, then by chemical hydrolysis treatment three times. During the first chemical catalytic hydrolysis process, hemicellulose hydrolysis, protein and lipid is hydrolyzed. Chemical intermediates furfural and acetic acid calcium are recovered from gas stream. Sugars, peptides, amino acids, fatty acids and glycerol are recovered from liquid stream that can be utilized as the main nitrogen sources for the fermentation industry. Cellulose is hydrolyzed into glucose as a carbon source for the fermentation industry at the second chemical catalytic hydrolysis process. Through nutritional adjustments, a series of fermentation products can be produced, such as microbial bacterial protein products, organic acids, amino acids, alcohols (n-butyl alcohol, ethyl alcohol, propylene glycol and butylene glycol) and features sugars (such as Chitosan). Fermentation waste liquid is made solubility of organic fertilizer. Lignin hydrolysis into fulvic acid at the third hydrolysis process. In addition, removable of persistent organic pollutants and heavy metals that can meet the required standards. The Last remaining matters are silt, masonry, glass and porcelain that can be used as the construction materials. This new idea cans realize the objective of zero residual and no secondary pollution.