接种菌剂和外加能源对污泥生物干化效果的影响

Effect of microbial inoculants and additional energy on bio-drying of dewatered sludge

采用自主设计的试验装置,研究了接种菌剂和外加能源对城市污水处理厂脱水污泥生物干化效果的影响。结果表明:(1)试验7d,添加接种菌剂的物料升温累积值为66.0℃.d,比不添加接种菌剂(18.3℃.d)大261%;添加接种菌剂物料的水分去除率(27.33%)比不添加接种菌剂(18.56%)提高了8.77百分点;添加接种菌剂物料的挥发性固体(VS)降解率(20.90%)比不添加接种菌剂(12.31%)高8.59百分点;添加接种菌剂物料的减重率(18.67%)比不添加接种菌剂(10.80%)高7.87百分点。(2)试验8d,添加外加能源的升温累积值(69.5℃.d)比不加外加能源(46.2℃.d)大50.43%;添加外加能源物料的水分去除率(33.50%)比不加外加能源(28.56%)高4.94百分点;添加外加能源的物料VS降解率(22.62%)比不加外加能源(19.67%)高2.95百分点;添加外加能源物料的减重率(19.56%)比不加外加能源(17.87%)高1.69百分点。

Influences of microbial inoculants and additional energy on bio-drying of dewatered sludge were stud- ied in self-designed experimental equipment. Results showed that after 7 days of experiment,the temperature cumula- tion （TC） of microbial inoculated material reached to 66.0℃·d,which was 261% higher than that of no microbial inoculation materials （18.3℃·d）. The moisture removal rate of microbial inoculation material was 27.33%, which was 8.77 percent higher than that of no microbial inoculation materials （18.56%）;VS degradation rate of microbial inoculation material was 20.90 %, which was 8.59 percent higher than no microbial inoculation materials （12.31%） weight loss rate of microbial inoculation materials was 18.67 %,which was 7.87 percent higher than that of no micro- bial inoculation materials （10.80 % ）. Compared with groups of no additional energy, adding additional energy enhanced the TC of material by 50.43% （from 46.2℃·d to 69.5 ℃·d） after 8 days of experiment,besides,additional energy improved moisture removal rate,VS degradation rate and weight loss rate of materials by 4.94,2.95,1.69 percents, with the moisture removal rate, VS degradation rate and weight loss rate of no microbial inoculation materials and microbial inoculation materials were 28.56 %, 19.67%, 17.87 % and 33.50%/0,22.62 %, 19.56 % ,respectively.