Department of Civil Engineering, Regional Centre of Anna University, Tirunelveli, India.
Department of Civil and Materials Engineering, University of Illinois at Chicago, United States.
Bioresour Technol. 2015 Dec;197:64-71. doi: 10.1016/j.biortech.2015.08.038. Epub 2015 Aug 22.
This investigation explores the influence of titanium dioxide (TiO2) in deflocculating (removal of extracellular polymeric substance - EPS) the sludge and subsequent biomass disintegration by bacterial pretreatment. The EPS removed at an optimized TiO2 dosage of 0.03g/g of SS of TiO2 and a solar radiation exposure time of 15min to enhance the subsequent bacterial disintegration. The outcomes of the bacterial pretreatment reveal SS reduction and COD solubilization for the deflocculated (EPS removed and bacterially pretreated) sludge was observed to be 22.8% and 22.9% which was comparatively greater than flocculated (raw sludge inoculated with bacteria) and control (raw) sludge. The higher methane production potential of about 0.43(gCOD/gVSS) was obtained in deflocculated sludge than the flocculated (0.20gCOD/gVSS) and control (0.073gCOD/gVSS). Economic assessment of this study provides a net profit of about 131.9USD/Ton in deflocculated sludge.
本研究探讨了二氧化钛 (TiO2) 在分散（去除细胞外聚合物 - EPS）污泥中的作用，以及细菌预处理对随后生物量解体的影响。在最佳 TiO2 剂量为 0.03g/g SS 的 TiO2 和 15 分钟的太阳辐射暴露时间下，去除 EPS，以增强随后的细菌解体。细菌预处理的结果表明，对于分散的（去除 EPS 并经细菌预处理的）污泥，SS 减少和 COD 溶解分别为 22.8%和 22.9%，这比絮凝（接种细菌的原始污泥）和对照（原始）污泥更高。分散污泥的甲烷产量潜力较高，约为 0.43(gCOD/gVSS)，而絮凝污泥（0.20gCOD/gVSS）和对照污泥（0.073gCOD/gVSS）较低。本研究的经济评估提供了约 131.9 美元/吨分散污泥的净利润。
