To make microbial community be applied more easily in practical biotreatment engineering,three acclimation processes were carried out in lab scale. Three kinds of mixed microorganism cultures with degradability for a ...To make microbial community be applied more easily in practical biotreatment engineering,three acclimation processes were carried out in lab scale. Three kinds of mixed microorganism cultures with degradability for a gas-making plant wastewater were obtained. The degradation experiments results of coal-gas wastewater indicated that different acclimation processes had obviously impacted on degradability of microbial community,and under high sludge loading rate,mixed microorganism cultureⅠ(obtained by H.S.B as bacteria source and raw wastewater as alone carbon and energy source)presented stronger degradability for coal gasification wastewater than the others. COD removal rate of mixed cultureⅠcan reach 57.6% under very low MLSS when the influent COD is 900 mg/L. Meanwhile,the results of microscopic examination showed that Protozoa,mainly epistylis and Vorticella species,were stronger activity and larger quantities in mixed cultureⅠ.展开更多
以新疆宜化污水处理厂化学软化工段污泥为研究对象,对样品进行形貌(SEM)、灰成分(XRF)、晶相结构(XRD)和官能团特征(FTIR)分析,并基于热重方法(TG-DTG)测试样品在惰性气氛和氧化性气氛下的热转化性能。结果表明:污泥呈片层状结构,主要...以新疆宜化污水处理厂化学软化工段污泥为研究对象,对样品进行形貌(SEM)、灰成分(XRF)、晶相结构(XRD)和官能团特征(FTIR)分析,并基于热重方法(TG-DTG)测试样品在惰性气氛和氧化性气氛下的热转化性能。结果表明:污泥呈片层状结构,主要由灰分(66.19%)组成,水分也较高(14.34%),具有一定的挥发分(17.38%)。污泥中的氧化物主要为P_(2)O_(5)、Ca O、Fe_(2)O_(3)和MgO等,主要结晶组分为磷酸盐,还有少量的C_(2)H_(5)N_(3)O_(2)。污泥热化学转化性能测试显示:在惰性气氛下的热解失重率为35.48%,主要归因于污泥中小分子或有机质的分解;在氧化性气氛下的燃烧失重率为34.75%,主要是污泥中有机质的氧化所致。基于Coast-Redfern模型的燃烧动力学拟合发现:污泥样品第四阶段的燃烧反应拟合效果更好,其反应级数以3级较为适宜,活化能为301.94 k J/mol,说明污泥中磷酸盐的分解和固定碳的燃烧需要更高的能量。展开更多
基金Sponsored by the National High Technology Research and Development Program of China(863 Program)(Grant No.2007AA06A411)
文摘To make microbial community be applied more easily in practical biotreatment engineering,three acclimation processes were carried out in lab scale. Three kinds of mixed microorganism cultures with degradability for a gas-making plant wastewater were obtained. The degradation experiments results of coal-gas wastewater indicated that different acclimation processes had obviously impacted on degradability of microbial community,and under high sludge loading rate,mixed microorganism cultureⅠ(obtained by H.S.B as bacteria source and raw wastewater as alone carbon and energy source)presented stronger degradability for coal gasification wastewater than the others. COD removal rate of mixed cultureⅠcan reach 57.6% under very low MLSS when the influent COD is 900 mg/L. Meanwhile,the results of microscopic examination showed that Protozoa,mainly epistylis and Vorticella species,were stronger activity and larger quantities in mixed cultureⅠ.
文摘以新疆宜化污水处理厂化学软化工段污泥为研究对象,对样品进行形貌(SEM)、灰成分(XRF)、晶相结构(XRD)和官能团特征(FTIR)分析,并基于热重方法(TG-DTG)测试样品在惰性气氛和氧化性气氛下的热转化性能。结果表明:污泥呈片层状结构,主要由灰分(66.19%)组成,水分也较高(14.34%),具有一定的挥发分(17.38%)。污泥中的氧化物主要为P_(2)O_(5)、Ca O、Fe_(2)O_(3)和MgO等,主要结晶组分为磷酸盐,还有少量的C_(2)H_(5)N_(3)O_(2)。污泥热化学转化性能测试显示:在惰性气氛下的热解失重率为35.48%,主要归因于污泥中小分子或有机质的分解;在氧化性气氛下的燃烧失重率为34.75%,主要是污泥中有机质的氧化所致。基于Coast-Redfern模型的燃烧动力学拟合发现:污泥样品第四阶段的燃烧反应拟合效果更好,其反应级数以3级较为适宜,活化能为301.94 k J/mol,说明污泥中磷酸盐的分解和固定碳的燃烧需要更高的能量。