Research on Aerobic Composting Using Biological Enhanced Dewatered Sludge

Aerobic composting experiment was carried out by using bio-enhanced dewatered sludge as raw material. The experiment was carried out on the aerobic composting of sludge and crop conditioner. Studied on the changes of physical and chemical indexes in the process of composting. The results showed that the temperature of stack rose rapidly in the initial stage, it could be maintained at high temperature stage (>50°C) for 5 days; at the end of composting, the water content of stack decreased to 37.35%, the sludge reduction effect was remarkable; the organic matter of the stack was 40.28%, pH value rose to 7.33; ammonia nitrogen and total phosphorus increased by 548.4% and 60.6%, compared with those before composting, the nutrient index has been improved; sludge physical and chemical indexes, nutrient indexes and pollutant indexes all meet the regulations, the composted sludge could be used for landscaping.