Department of Civil Engineering, Regional Centre of Anna University, Tirunelveli, India.
Department of Civil Engineering, Regional Centre of Anna University, Tirunelveli, India.
Bioresour Technol. 2017 Nov;244(Pt 1):776-784. doi: 10.1016/j.biortech.2017.08.030. Epub 2017 Aug 9.
In the present study, the deflocculated sludge was disintegrated through thin layer immobilized titanium dioxide (TiO) as photocatalyst under solar irradiation. The deflocculation of sludge was carried out by 0.05g/g SS of sodium citrate aiming to facilitate more surface area for subsequent TiO mediated disintegration. The proposed mode of disintegration was investigated by varying TiO dosage, pH and time. The maximum COD solubilization of 18.4% was obtained in the optimum 0.4g/L of TiO dosage with 5.5 pH and exposure time of 40min. Anaerobic assay of disintegrated samples confirms the role of deflocculation as methane yield was found to be higher in deflocculated (235.6mL/gVS) than the flocculated sludge (146.8mL/gVS). Moreover, the proposed method (Net cost for control - Net cost for deflocculation) saves sludge management cost of about $132 with 53.8% of suspended solids (SS) reduction.
在本研究中，通过在太阳照射下将薄层固定化二氧化钛（TiO）作为光催化剂使去絮污泥解体。通过向污泥中投加 0.05g/gSS 的柠檬酸钠来实现污泥的去絮，目的是为后续的 TiO 介导的解体提供更多的表面积。通过改变 TiO 用量、pH 值和时间来研究所提出的解体模式。在最佳的 0.4g/L TiO 用量、5.5pH 值和 40min 暴露时间下，获得了最大 COD 溶出率 18.4%。解体样品的厌氧试验证实了去絮的作用，因为发现去絮污泥（235.6mL/gVS）的甲烷产量高于絮污泥（146.8mL/gVS）。此外，该方法（控制净成本-去絮净成本）可节省约 132 美元的污泥管理成本，同时悬浮物（SS）减少 53.8%。
