Industrial-scale application of the plunger flow electro-oxidation reactor in wastewater depth treatment
Industrial-scale application of the plunger flow electro-oxidation reactor in wastewater depth treatment
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柱塞流电氧化反应器在废水深度处理中的工业化应用
DOI：
10.1007/s11356-016-7033-2
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发表时间：
2016-06
影响因子：
5.8
通讯作者：
Wang Jiade
中科院分区：
文献类型：
--
作者：
Huang Guolong;Yao Jiachao;Pan Weilong;Wang Jiade
生化处理后的废水含有的污染物大多是不可降解的。基于以前的中试规模的测试结果，工业规模的电氧化装置，建立了从公园污水处理厂的流出物中分解这些耐火材料。电氧化装置采用沟槽状柱塞流电解槽，阳极为钛网/PbO 2电极，阴极为相同尺寸的钛网。废水垂直流过电极;电池的有效体积为2.8 m3，表面积与体积比为17.14 m2 m −3。最佳电流密度为100 A m-2，合适的流速为14.0 m h-1。对化学需氧量和色度的去除率分别在60.0%和84.0%以上。此外，电氧化系统提供了良好的消毒能力。该工业规模装置的比能耗为43.5 kWh kg COD−1，电流效率为32.8%，优于中试规模装置的上级。为了满足排放或再利用的要求，运营成本为每吨污水0.44美元，平均电价为0.11 kWh-1美元。
Effluents after biochemical treatment contain pollutants that are mostly non-degradable. Based upon previous pilot-scale test results, an industrial-scale electro-oxidation device was built to decompose these refractory materials in the effluent from a park wastewater treatment plant. The electro-oxidation device comprised a ditch-shaped plunger flow electrolysis cell, with mesh-plate Ti/PbO2electrodes as the anode and the same size mesh-plate Ti as the cathode. Wastewater flowed vertically through electrodes; the effective volume of the cell was 2.8 m3, and the surface-to-volume ratio was 17.14 m2m−3. The optimal current density was 100 A m−2, and a suitable flow velocity was 14.0 m h−1. The removal efficiencies for chemical oxygen demand and color in the effluent were over 60.0 and 84.0 %, respectively. In addition, the electro-oxidation system offered a good disinfection capability. The specific energy consumption for this industrial-scale device was 43.5 kWh kg COD−1, with a current efficiency of 32.8 %, which was superior to the pilot-scale one. To meet the requirements for emission or reuse, the operation cost was $0.44 per ton of effluent at an average price for electricity of $0.11 kWh−1.
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