贵屿土壤对污泥堆肥去除十溴联苯醚的影响  

Effect of Guiyu Soil on Removal of Decabromodiphenyl Ether (BDE209) by Sludge Composting

作　　者：卢妙 尹华[1,2] 彭辉 杨萍萍[1,2] 唐少宇 刘皓 魏西鹏[1,2] 

机构地区：[1]华南理工大学环境与能源学院工业聚集区污染控制与生态修复教育部重点实验室,广东广州510006 [2]华南理工大学广东省环境风险防控与应急处置工程技术研究中心,广东广州510006 [3]暨南大学化学与材料学院,广东广州510632

出　　处：《中国给水排水》2018年第5期109-114,共6页China Water & Wastewater

基　　金：广东省科技厅公益研究与能力建设专项重点项目(2015B020215006);广州市科信局产学研协同创新重大专项(2014Y2-00523)

摘　　要：考察了利用污泥堆肥同时实现污泥资源化、减量化和去除污泥中十溴联苯醚(BDE209)的可行性。以污泥、锯末、蘑菇渣为堆肥原料,通过测定堆体中BDE209浓度、温度、p H值、有机质含量、含水率及种子发芽指数等,比较了有/无添加贵屿土壤的堆肥效果,并分析了添加贵屿土壤对BDE209的去除效果。富集培养两个堆体物料中的微生物,制成相应的BDE209微生物复合菌剂,探讨了微生物是否是堆体降解BDE209的主要原因。结果表明,有/无添加贵屿土壤的堆体可维持55℃以上的时间分别为7和6 d,均达到了堆体物料无害化要求;贵屿土壤的添加促进了堆肥物料的腐熟和BDE209的去除效果,使种子发芽指数从85.2%提高到102.3%,BDE209的残留率从86.2%下降到28.2%,并使BDE209的降解半衰期从203.9 d下降到15.4 d。从添加贵屿土壤堆体中提取的微生物复合菌剂对BDE209的去除率高达53.0%,而从对照堆体中提取的微生物复合菌剂对BDE209的去除率在10%以内,复合菌剂降解半衰期也从49.5 d缩短到4.3 d,表明生物降解可能是污泥好氧堆肥过程中BDE209的主要去除途径。Feasibility of simultaneous sludge resource, reduction and removal of decabromodiphe-nyl ether （BDE209） by sludge composting was investigated. Municipal sludge, sawdust and mushroom residues were chosen as raw materials for composting, the composting effect of adding and without adding Guiyu soil was compared by determining BDE209 concentration, temperature, pH value, organic matter content, moisture content and germination index （ GI）, and the effect of adding Guiyu soil on the removal of BDE209 was also evaluated. The relevant compound microorganism bacterium agent of BDE209 was prepared through the enrichment culture of microorganisms in the pile, to explore whether the microorgan- isms played an important role in the removal of BDE209. The results showed that durations of the two piles that keeping the temperature above 55 ℃ were 7 days and 6 days respectively, both of which had met the harmless requirement. The addition of Guiyu soil to the pile had positive impacts on the removal of BDE209 and GI, which increased the GI from 85.2% to 102.3% , decreased the BDE209 residual rate from 86.2% to 28.2% , and reduced the half-time of BDE209 from 203.9 d to 15.4 d. The removal rate of BDE209 by the microorganism extracted from the pile added with Guiyu soil was as high as 53.0% , but the removal rate of BDE209 from the control pile was less than 10% , and the half-time of compound microorganism bacterium agent was decreased from 49.5 d to 4.3 d. The results showed that hiodegradation was the main removal pathway of BDE209 during sludge composting.

关 键 词：污泥堆肥 贵屿土壤 十溴联苯醚 微生物复合菌剂 

分 类 号：TU992.3[建筑科学—市政工程]