Analysis and evaluation of physical and chemical properties of the artificial soil based on sludge compost products and sludge mud residue
In order to realize the synergetic treatment and resource utilization of sewage sludge and mud residue,this study prepared the artificial soil by"two-step method",and investigated the effect of different ratio conditions on the physical and chemical properties of the artificial soil.The aerobic composting was carried out with sewage sludge mixing with three different auxiliary materials(corn stalk,mushroom residue and wood chips)and the results showed that the maturity and heavy metal content after composting were in line with relevant national standards.The artificial soil was prepared by sludge composting and sludge residue,and its physical and chemical properties were similar to those of natural soil.The added amount of compost can significantly affect the water-stable agglomerates,pH value,electrical conductivity,organic matter,total nitrogen and available phosphorus of the artificial soil.In the application of artificial soil planting,the compost planting effect of corn stalk+sludge was the best.The improved Nemerow comprehensive index method was used for comprehensive evaluation.After comprehensive consideration,sludge+corn stalk compost product addition of 30％,residual sludge residue content of 70％and sludge+corn straw compost product addition of 50％,residual mud residue addition of 50％are the best artificial soil,followed by sludge+wood chips compost,sludge+mushroom residue compost effect is the worst.
sludgecompostadded ratioartificial soilphysical and chemical property
国家科技期刊平台
NSTL
万方数据
