科研之友
微信
新浪微博
Facebook
分享链接
摘要
Aiming at the demand for the treatment and dis excess surplus sludge, kitchen waste, and crop straw produced by rural sewage treatment and the low efficiency of composting resources, two-stage aerobic co-composting technology was adopted to realize the efficient resource utilization of rural organic solid wastes to improve aerobic composting efficiency. Through the two-stage aerobic cooperative composting technology, the effects of composting and equipment utilization were investigated. By adding biochar, the influence of biochar on the two-stage aerobic cooperative composting was discussed. The results show that the two-stage aerobic co-composting was completed in 31 days, with the first fermentation time lasted for 12~14 days and the temperature of the compost could reach 63~68 ℃, which met the Hygienic Requirements for Harmless Disposal of Night Soil (GB 7959-2012). The utilization rate of main equipment increased by more than 50%. The quality of composting products reached the "Organic Fertilizer Standard" (NY 525-2012), Bio-Organic Fertilizer Standard (NY 884-2004) and Disposal of Sludge From Municipal Wastewater Treatment Plant—Quality of Sludge Used in Gardens or Parks (GB/T 23486-2009). The addition of biochar could rise the maximum temperature of compost by 5 ℃, prolong the high temperature period by 4 days, decrease the loss rate of total nitrogen, total potassium and total phosphorus by 23%, 16% and 23% respectively, promote the increase rate of H/F ratio by 50%, decrease the loss rate of humus by 10%, enhance the degradation rate of organic matter by 17%, which optimized the composting process and improved the product quality. The research results can provide reference for the on-site resource treatment of rural organic solid wastes, especially rural excess sludge.
- 单位
