The Whole High-temperature Aerobic Composting Processes Rapidly Degrade The MSW And Determine Its Maturity

Composting is an recycling, reduction and safe disposal effective way to deal with municipal solid.Maturity is an important basis of quality assessment for compost process, the control of process and product quality assessment. The traditional composting existence many shortcomings, such as large investment, long production and unstable product quality. In order to improve the rate and the quality of MSW with compost. The researcher invention a new type of MSW technology—continuous high-temperature aerobic composting (CHAC). Through the external heat source to the compost heap in the process of material maintained at above 50℃.The research use two composting methods, the one is methods-traditional aerobic composting (THAC) A; the other is CHAC B. each period is 60d. At the same time, monitoring the change of pH, temperature, moisture parameters et al during composting. And the parameters of C/N, GI, DOC, SOUR, DH-ase and the situation analysis of bacterial DGGE bands were used to evaluate the maturity and quality of compost product. Through the determination of physical and chemical properties in composting pile. Which take a good reference for improving process and efficiency At the same time through the determination of the compost maturity indicator to provide a theoretical basis of the maturity degree of compost. During the composting period. The pile B has long high-temperature phase than pile A, which means than B was better meet the requirements of harmless waste disposal than A; the TOC values of pile A was stable after 20d and the TOC values of pile B was stable after 13d; the values of C/N was below 25 after 15d, the values of C/N was below 25 almost less than 8d; at the end of compost the DOC content in pile A and pile B were respectively at 0.542% and 0.466%,all meet the standards of literature in the decomposition; the GI values of pile A was reach 90% in the 26d,while the GI values of pile B was more than 90% at the 15d; the SOUR values of pile A reached to stability in the 28d,and the pile B was in the 16d; the DH-ase values of pile A reached to stability in the 32d, and the pile B was in the 15d; analysis of the DNA extraction of the compost samples and PCR-DGGE profiles of drawn, Conclusions that Decomposition cycle of pile A was about 28d, and pile B was about 28d.Though the parameters of the C/N, DOC, GI, SOUR, DH-ase and bacterial DGGE profiles as maturity indicator to pile A and pile B. the result show that the composting cycle of pile A and pile B was respectively at 26d and 28d. the pH value of the two products about 7, put the product of CHAC at 30℃,which physical and chemical properties without significant fluctuations. All indicating that the nature of CHAC products was stable. Therefore, this technology Process can significantly shorten the composting cycle, improve the compost quality, and has great potential.