不同电压下给水污泥真空电渗脱水效果分析-环境工程学报.PDF

第 11卷　 第6 期 环 境 工 程 学 报 Vol. 11,No.6 2 0 1 7 年 6 月 Chinese Journal of Environmental Engineering Jun . 2 0 1 7 不同电压下给水污泥真空电渗脱水效果分析 殷燕翔∗ 中铁第一勘察设计院集团有限公司,西安 710043 摘　 要　 采用真空电渗对给水污泥进行脱水,结果表明电压从 30 V 提高到60 和 100 V,给水污泥含水率从 90%分别降低 到63.2%、62.8%和58.7%。 详细考察电压对电流最大值、最高温度的影响,其电流最大值从 0.63 A 分别提高到 1.32 和 1.88 A;最高温度从38.4 ℃分别提高到43.6 和62.2 ℃。 水分分布和扫描电镜分析表明:脱水后,其自由水被全部去除,孔 -1 -1 隙水含量从 19.83 下降到0.41 kg ·(kg 干泥) ,表面结合水含量从5.35 下降到0.18 kg ·(kg 干泥) 。 关键词　 给水污泥;真空电渗;脱水 中图分类号　 TU99　 文献标识码　 A　 文章编号　 1673-9108(2017)06-3753-06　 DOI　 10.12030/ j.cjee.201602127 Vacuum-osmosis dewatering effect analysis of DWTS on different voltage YIN Yanxiang∗ China Railway First Survey Design Institute Group Co. Ltd. ,Xi’an 710043,China Abstract　 Vacuum electro-osmosis was used to dewater drinking-water treatment sludge (DWTS),the results showed that the moisture content of the DWTSwasreducedfrom90% to63.2,62.8,and58.7% when the volt- age increased from 30 V to60 and 100 V,respectively. The effect of voltage on the maximum current and maxi- mum temperature was investigated in detail. The maximum current increased from 0.63 A to 1.32 and 1.88 A; and the maximum temperature increased from38.4 ℃ to43.6 and62.2 ℃,respectively. The moisture distribu- tion and scanning electron microscopy analysis showed free water was removed completely,that pore water was -1 reduced from 19.83 to0.41kg ·kg dry cake,and that surface-adhesion water wasreduced from5.35 to0.18 -1 kg ·kg dry cake. Key words　 drinking water treatment sludge;vacuum electro-osmosis;dewatering 给水污泥作为一种 Al(OH) 絮体结构的污泥,具有含水率高、生物活性低和有机物含量低的特点,主 3 [1] 要包括沉淀池排泥水和絮凝池反冲洗水。 沉淀池污泥产量占