Effects On Bio-composting Remediation Of Organic Pollutants-contaminated Soil

In recent years, along with the intensification of various production activities, soilenvironment for human survival has suffered a serious threat by a growing number of toxic andhazardous substances, especially the organic pollution. Organic pollutants in the soil which willenter the atmosphere, groundwater bodies and other media, through volatilization, leaching andother processes, which leads to secondary pollution. Strengthening of organic pollutants insoil-related research for control of soil and groundwater pollution caused by organic compoundsare of great significance.We processed soil contaminated by organic pollutants by organic bio-composting60daysthrough adding mushroom residue, organic fertilizer and nitrogen fertilizer on soil. Regularmonitoring reactor temperature change, organic matter change, total nitrogen and totalphosphorus content and microbial populations change of composting. We studied the effects ofnutrients adding, turning and aeration to rate of degradation of organic pollutants. The mainresearch results are as follows:(1) Adding mushroom residue could increase soil water-holding capacity，but mushroomresidue ratio reached a certain additives soil water-holding capacity did not improve，Comprehensive economic analysis of the most appropriate，Our selection of additives formushroom residue was6%.(2) Adding nutrients, mushroom residue, watering, aeration, turning could increase the soilorganic matter, total nitrogen consumption of composting。Highest rates of organic matter, totalnitrogen consumption was3#with Adding nutrients, mushroom residue, watering, aeration,turning. Adding nutrients, mushroom residue, watering, aeration, turning could increase themaximum temperature1~5℃and Extened the high-temperature phase1~2D. It could increasedmicrobial numbers one or two orders of magnitude.(3) After60days of bio-composting, content of organic pollutants in the soil had decreasedsignificantly. Adding nutrients, mushroom residue, watering, aeration, turning could increasevaried degradation rates of organic pollutants. Organic pollutants degradation rates of0#、1#、2#、3#、4#were50.40%、86.67%、90.53%、84.46%、77.36%.2#＞1#＞3#＞4#＞0#.