不同方式处理污泥对废弃矿区土壤微生物的影响* |
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范博博,杨长明**
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(同济大学环境科学与工程学院,上海200092) |
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摘 要:为寻找适合巢湖流域的污泥处理处置方式及满足废弃矿区土壤修复对有机改良基质的需求,将巢湖市岗岭污水厂脱水污泥、好氧发酵污泥和厌氧消化污泥分别与巢湖市大黄山废弃矿区土壤按照一定比例混匀进行盆栽试验,研究不同方式处理污泥添加对废弃矿区土壤的基本理化性质及微生物特性的影响。结果表明:不同方式处理污泥均可以明显提高废弃矿区土壤的有机质和氮磷养分含量;pH值有不同程度的降低;电导率EC值均明显增加,但仍低于植物正常生长限值;同时可以增加土壤微生物量碳氮含量,促进脱氢酶、转化酶、磷酸酶和脲酶的活性。说明三种污泥对废弃矿区土壤质量具有不同程度的改善,以好氧发酵污泥的改良效果最佳。 关键词:巢湖流域,稳定化污泥,废弃矿区土壤,微生物特性 中图分类号:X705 文献标识码:A |
Effects of Addition of Treated Sludge with Different Methods on Microorganisms in Abandoned Mining Areas Soil |
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FAN Bobo,YANG Changming |
(College of Environmental Science and Engineering,Tongji University,Shanghai200092) |
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Abstract:In order to find suitable treatment and disposal methods of sludge and meet the demand of organic improvement matrix for abandoned mining areas soil remediation in Chaohu Lake Basin,apot experiment was conducted to mix the dewatered sludge, aerobic fermentation sludge and anaerobic digestion sludge of Chaohu Gangling Sewage Treatment Plant with the Chaohu Dahuangshan abandoned mining area soil in accordance with a certain proportion, the effects of adding sludge treated by different methods on basic physical and chemical properties and microbial characteristics of abandoned mining areas soil were studied,The results show that: the organic matter, nitrogen and phosphorus nutrients contents of abandoned mining soil can be significantly increased by adding sludge which treated by different ways;the pH values decrease in varying degrees;thevalues of conductivity increased significantly,but it is still below the normal growth limit of plants;at the same time, it can increase soil microbial biomass carbon and nitrogen contents, and can promote the activities of dehydrogenase, invertase, phosphatase and urease.Andthe results show that the abandoned mining areasoil quality are improved by three kinds of sludge in varying degrees,aerobic fermentation sludge has the best improvement effect. Keywords:chaohu lake basin;stabilized sludge;abandoned mining area soil;microbial characteristics |