Quenched And Dehydrated Sludge Drying And Composting Trial

With the promotion of national energy saving and environmental protectionpolicy，the country build a number of sewage treatment plants, urban sewagetreatment capacity and urban sewage treatment rate substantial increase. At the sametime, the product of sewage sludge treatment process in the production also surged,the problem of secondary pollution caused by sewage sludge is becomingincreasingly severe. Common approach has concentration, dehydration, heattreatment。This paper introduce classification、composition and nature of municipalsewage sludge,describes sludge treatment and disposal situation at home and abroad,introduce sludge drying process and equipment. The sludge of different moisturecontent morphology experiment describe sludge of different moisture contentappearance, describe their basic properties and their corresponding disposal methods.this paper introduces process、 composition、 characteristics of sludge dryingequipment, it has many other advantages, such as strengthen the collection anddisposal of waste water, waste gas, it can control sludge particle size, the oxygencontent and temperature of drying device to prevent an explosion, to strengthensecurity. The paper find optimal operating conditions through an orthogonalexperiment, account for the running costs of the process.utilization of sewage sludge is now a hot research field, finished sludge has thecharacteristics of high PH value and low organic matter content, The finished sludgeand spent mushroom blend to improve various properties of sewage sludge. Find thebest mixing ratio through the experimental data, sludge composting can achievegood result. The finished product after the drying sludge and Wong Nai mixing theproduction of matrix soil to cultivate Huang Rong Miao. through the experimentaldata to find the best mixing ratio of finished sludge and Wong Nai.