【摘要】 电渗透脱水技术对于污泥深度脱水具有经济性优势,尤其适用于机械脱水后的污泥。而阳离子聚丙烯酰胺（CPAM）是机械脱水工业中应用最普遍的调质剂,故考察了CPAM调质对污泥电渗透脱水的影响。结果显示,虽然CPAM有利于污泥的机械脱水,但是却造成后续电渗透脱水效率的下降,综合权衡后CPAM的最佳投加量为3 mg/g干泥,且在电场强度为20 V/cm、脱水时间为6 min的条件下,污泥的含水率由机械脱水后的80%下降至62. 4%,平均耗能为0. 061kW·h/kgH₂O。污泥的表面电荷是CPAM影响污泥电渗透脱水效率的一个重要因素,而污泥颗粒粒径和结合水含量对其影响较小。此外,CPAM可以有效抑制电渗透脱水阴极侧污泥的黏壁问题。更多还原

【Abstract】 Electro-dewatering technology has a cost-efficient potential for deep dewatering of sludge,especially for sludge after mechanical dewatering. Cationic polyacrylamide（CPAM） is the most widely used conditioner in mechanical dewatering industry. The influence of CPAM on electro-dewatering behavior was investigated. Although CPAM was beneficial for mechanical dewatering,it decreased the subsequent electro-dewatering efficiency. After comprehensive balance,the optimal dosage of CPAM was 3 mg/g dry sludge. When the applied electric field intensity and dewatering time were 20 V/cm and 6 min,the water content decreased from 80% to 62. 4% and the average energy consumption was 0. 061 kW·h/kg H-₂O. The surface charge of sludge was an important factor that CPAM affected the dewatering efficiency of electro-dewatering,but the effect of sludge particle size and bound water content was small.Besides,CPAM could effectively inhibit sludge adhesion on the cathode side of electro-dewatering.更多还原