摘要
采用正交实验设计方法,以氯化铁溶液及改性黏土为调理剂,探究不同温度下污泥脱水性能的改变。以污泥的毛细吸水时间(CST)为指标,对药剂最佳投配比例和最佳反应温度进行优化设计。结合扫描电镜、红外光谱分析、zeta电位分析了改性机理。结果表明,在氯化铁投加7%、改性黏土投加50%(投加量均以污泥干基计)、反应温度为60℃的条件下,CST取得最小值22.12 s;改性后污泥絮体结构松散,呈多孔状,有利于水分脱离。
The effects of different temperatures on the dewatering performance of sludge were studied by applying the orthogonal experiment design method, using ferric chloride solution and modified clay as conditioner agents. Using capillary suction time（hereinafter referred to as CST） as the index, the optimum proportion of the cast and the optimum reaction temperature were optimized. The modification mechanism was analyzed by scanning electron microscope（SEM）, infrared spectroscopy and zeta potential analysis. The experimental results show that CST reaches the minimum value of 22.12 s when the ferric chloride is added with7 % and the modified clay is added with 50 %（the dosage is on the sludge basis） at a reaction temperature of 60 ℃. The flocculation structure of the modified sludge is loose and porous which facilitates dewatering.
作者
王瑛
WANG Ying(Hangzhou Environmental Protection Research Institute of China Coal Technology ＆ Engineering Group,Hangzhou 311201,China)
出处
《能源环境保护》
2018年第4期40-43,共4页
Energy Environmental Protection
关键词
污泥脱水
改性黏土
氯化铁
毛细吸水时间
Sludge dewatering
Modified clay
Ferric chloride
Capillary suction time.
