Department of Civil Engineering, Regional Centre of Anna University, Tirunelveli, India.
Department of Civil Engineering, Ponjesly College of Engineering, Nagercoil, India.
Chemosphere. 2017 May;175:66-75. doi: 10.1016/j.chemosphere.2017.02.046. Epub 2017 Feb 8.
In this study, an attempt was made to disintegrate waste activated sludge (WAS) in a cost-effective way. During the first phase of this study, effective break down of extracellular polymeric substance (EPS) was performed by deflocculating WAS with 0.1 g/g SS of MgSO. Deflocculation rate was 92% with discharge rate of extractable EPS at 185 mg/L. In the second phase, effective bacterial cell disintegration was obtained at 36 h post treatment. Maximum solubilization of deflocculated sludge was approximately 21%, which was higher than that of flocculated sludge (14.2%) or the control (4.5%). Biodegradability studies were assessed through kinetic analysis by non-linear regression modeling. Results revealed that the deflocculated sludge had higher methane generation (at about 235.8 mL/gVs) compared to flocculated sludge (at 146.1 mL/gVs) or the control (at 34.8 mL/gVs). Cost assessment of the present work revealed that the net yield for each ton of the deflocculated sludge was about 32.99 USD.
本研究旨在以经济有效的方式对剩余活性污泥（WAS）进行解体。在研究的第一阶段，通过向每克 SS 添加 0.1g 的 MgSO4 使 WAS 去絮，成功地分解了细胞外聚合物物质（EPS）。去絮率达到 92%，可提取的 EPS 排放量为 185mg/L。在第二阶段，处理后 36 小时即可获得有效的细菌细胞解体。解絮污泥的最大溶解率约为 21%，高于絮状污泥（14.2%）或对照组（4.5%）。通过非线性回归建模的动力学分析评估了生物降解性研究。结果表明，与絮状污泥（146.1 mL/gVs）或对照组（34.8 mL/gVs）相比，解絮污泥具有更高的甲烷生成量（约 235.8 mL/gVs）。本研究的成本评估表明，每吨解絮污泥的净收益约为 32.99 美元。
