Urban Organic Waste And Sludge Joint Pilot Study Digest

The municipal solid waste and urban sewage treatment plant sludge handling and disposal of waste disposal on behalf of two different principles. Traditional municipal solid waste management to deal with - and little attention before processing and recycling issues.With the introduction of increasingly stringent environmental laws, municipal solid waste landfill approach traditional land costs are increasingly high, with the traditional approach to municipal solid waste, compared with the sludge treatment broader approach (sludge stabilization, sludge volume reduction) and end-use (sludge composting, land application).Through conventional methods would allow low-solid anaerobic digestion sludge stabilization, sludge anaerobic digestion processing benefits include : reduction of final disposal volume and improve dehydration performance, and reduce corruption nature, the plant used to produce methane gas, reducing the organic crop. Less than that, because of excessive concentration of mud, water, digest processing demands considerable energy input. Therefore, this method of relatively small sludge treatment plant, not very attractive.All of the organic waste and urban sewage sludge digestion technology for joint exploration, the search for the best value to be both appropriate C/N than, the rate of temperature and wet. And in the best conditions of the study and analysis of trace metal ions in particular Fe²⁺, Co²⁺, Ni²⁺ impact on the response system, and analysis of the best conditions in the coal ash content of the response system.Considering of economical and safe aspects comprehensively, the optimal addition quantity of trace metal ions-Fe²⁺, Co²⁺ and Ni²⁺ is 0.9-1.2 mg/(L·d), 0.09-0.12 mg/(L·d) and 0.18-0.24 mg/(L·d) correspondingly, according to results of comparative expenriments and single factor experiments of co-digestion for MOR and sewage biosolids. The results show that the biogas productivity, the conversion efficiency of organic fraction, the maximum specific rate of biogas production and methane content in biogas increase by 30%, 10%, 50% and 10% correspondingly, and the stability of digestion system is enhanced, the digestion period is shortened and the problem of the volatile fatty acid accumulation is solved effectively. In addition, Fe²⁺, Co²⁺ and Ni²⁺...