酸洗废液对污泥脱水性能的影响

发布时间：2018-01-11 15:00

本文关键词：酸洗废液对污泥脱水性能的影响　出处：《陕西科技大学学报(自然科学版)》2017年02期 　论文类型：期刊论文

【摘要】：将污泥比阻(SRF)、毛细吸水时间(CST)作为污泥脱水性能的主要评价指标,结合污泥沉降性能的变化,在单一药剂阳离子聚丙烯酰胺(CPAM)、酸洗废液(WPL)、FeCl_3、PAC对污泥调理的基础上,以FeCl_3、PAC和CPAM对污泥的联合调理为对照,研究了WPL和CPAM联合调理时投加量、投加方式等因素对污泥脱水效果的影响.实验结果表明:单独投加WPL时(按Fe2+质量计),最佳投加量为7 g/L,污泥比阻为2.86×10~(12)m/kg,毛细吸水时间为10.6 s,与原污泥相比分别降低了79.8%、75%;WPL联合CPAM调理后污泥脱水效果优于WPL单独进行调理.当WPL、CPAM的加药量分别为1.1 g/L、60 mg/L,投加方式为先加WPL再加CPAM时,污泥比阻为1.7×10~(12)m/kg,毛细吸水时间为6.7 s,分别降低了88%、84.2%,污泥沉降性能得到明显改善.
[Abstract]:The sludge specific resistance (SRF) and capillary water absorption time (CSTs) were taken as the main evaluation index of sludge dewatering performance. Combined with the change of sludge settling performance, cationic polyacrylamide (CPAM) was used as a single agent. Based on the treatment of sludge by WPLL and FeCl3PAC, the combined treatment of FeCl3PAC and CPAM was used as the control. The effects of dosage and mode of WPL and CPAM on sludge dewatering were studied. The experimental results showed that only WPL was added (according to the mass of Fe2). The optimum dosage was 7 g / L, the specific resistance of sludge was 2.86 脳 10 ~ (10) ~ (-1) m / kg, and the capillary water absorption time was 10.6 s, which was 79.8% lower than that of the original sludge. The dewatering effect of WPL combined with CPAM was better than that of WPL alone, when the dosage of CPAM was 1.1 g / L ~ (60) mg/L, respectively. When WPL was added first and CPAM was added, the specific sludge resistance was 1.7 脳 10 ~ (-1) / kg, and the capillary water absorption time was 6.7 s, which decreased 88 ~ 84.2% respectively. Sludge settling performance was improved obviously.
【作者单位】：陕西科技大学环境科学与工程学院;
【基金】：陕西省科技厅社会发展科技攻关计划项目(2013K13-01-07) 温州市水体污染控制与治理科技创新项目(2016W0011) 陕西明德环保科技有限公司2016年专项项目(MDHB-20161001)
【分类号】：X703
【正文快照】： been significantly improved.0引言酸洗工艺在钢材加工、金属制品业等许多工业部门都被广泛应用,在生产过程中为了清除钢材表面的氧化铁皮,需使用盐酸进行酸洗,酸洗过程中会产生大量的盐酸酸洗废液,废液中一般富含丰富的废酸[1],氯化亚铁的质量分数约为10%20%.针对钢铁酸洗废

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