Zero discharge process for dyeing wastewater treatment
Zero discharge process for dyeing wastewater treatment
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印染废水处理零排放工艺
DOI：
10.1016/j.jwpe.2016.03.012
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发表时间：
2016-06-01
影响因子：
7
通讯作者：
Wang, Jiade
中科院分区：
文献类型：
--
作者：
Yao, Jiachao;Wen, Danni;Wang, Jiade
本研究对生化工艺后染色废水深度处理的新型零排放工艺的可行性进行了研究。该新工艺集成了反渗透（RO）技术、电化学氧化（EO）和双极膜电渗析（BMED）技术。 RO和BMED工艺产生的淡水以及BMED再生的混合酸碱溶液可以作为资源重复利用。印染废水深度处理过程中未向环境排放任何污染物或废水。探讨并讨论了回收率、比电流和输入功率等操作参数对 RO/EO/BMED 性能的影响。实验结果表明，RO/EO/BMED工艺的废水回收率达到97%，而RO或纳滤(NF)工艺的废水回收率为70%；废水中83%以上的总溶解固体（TDS）被脱盐并转化为混合酸碱溶液。处理1立方米废水总运行功率为24.6千瓦时，产生淡水0.97吨，产生混酸1.31千克（0.12摩尔/升）和碱2.16千克（0.18摩尔/升）。这项工作展示了 RO/EO/BMED 流程的概念验证；仍有待进一步优化。 (C) 2016 Elsevier Ltd. 保留所有权利。
The feasibility of a novel zero discharge process for dyeing wastewater depth treatment after biochemical processes was investigated in this study. The novel process was integrated with reverse osmosis (RO) technology, electrochemical oxidation (EO) and bipolar membrane electrodialysis (BMED). The fresh water generated from the RO and BMED processes and the mixed acid and base solutions regenerated from BMED could be reused as resources. No pollutants or wastewater were discharged into the environment during dyeing wastewater depth treatment. The effects of operation parameters, such as recovery ratio, specific current and input power on RO/EO/BMED performance were explored and discussed. The experimental results indicated that the recovery ratio of wastewater by this RO/EO/BMED process reached 97%, as compared with 70% achieved by RO or nanofiltration (NF); more than 83% of the total dissolved solids (TDS) in wastewater were desalinized and converted into mixed acid and base solutions. The total operating power requirement was 24.6 kWh to treat one cubic meter of wastewater, 0.97 tons fresh water and 1.31 kg mixed acid (0.12 mol/L) and 2.16 kg base (0.18 mol/L) were produced. This work has demonstrated proof of concept for the RO/EO/BMED process; further optimization remains to be carried out. (C) 2016 Elsevier Ltd. All rights reserved.