Efficient integrated processes for pulp and paper wastewater treatment and phytotoxicity reduction: Permanganate, electro-Fenton and Co3O4/UV/peroxymonosulfate
Efficient integrated processes for pulp and paper wastewater treatment and phytotoxicity reduction: Permanganate, electro-Fenton and Co3O4/UV/peroxymonosulfate
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DOI：
10.1016/j.cej.2016.09.015
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发表时间：
2017-01-15
影响因子：
15.1
通讯作者：
Omidinasab, Maryam
中科院分区：
文献类型：
--
作者：
Jaafarzadeh, Nematollah;Ghanbari, Farshid;Omidinasab, Maryam
制浆造纸废水是一种高强度废水，需要经过高级处理才能达到排放标准。首次采用高锰酸盐（PM）、电fenton （EF）、Co3O4/过氧单硫酸根/UV（硫酸根，SR）等综合工艺处理PPW。研究了各工艺的主要操作参数对化学需氧量（COD）的去除效果。结果表明，PM、EF和SR联合处理可使COD从1450 mg/L降至62 mg/L。此外，EF和SR出水的生物降解性也得到了提高。作为一个重要的结果，废水的pH在一程（PM）调整了一次，最终出水达到中性状态。采用发芽指数对各工艺出水的植物毒性进行了评价。他们的结果表明，在最终流出物中，四种植物的植物毒性显著降低。在COD去除的情况下，对各过程的顺序进行了评价。结果表明：PM + EF + SR是处理PPW的最佳工艺顺序。采用FTIR分析对PM和EF的污泥进行了评价。最后，这些化学、电化学和光化学工艺的组合被认为是处理PPW的一个很好的选择。(C) 2016 Elsevier B.V.版权所有
Pulp and paper wastewater (PPW) is a high strength effluent which requires advanced treatments for achieving the discharge standards. Integrated processes were used for the first time to treat PPW including permanganate (PM), electro-Fenton (EF) and Co3O4/Peroxymonosulfate/UV (sulfate radical, SR). The main operating parameters of each process were investigated on chemical oxygen demand (COD) removal. The results showed that the combination of PM, EF and SR processes could provide the discharge standard in a way that COD was reduced from 1450 to 62 mg/L. Moreover, the biodegradability of effluents obtained from EF and SR was improved. As an important result, pH of the wastewater was adjusted for one time at first process (PM) and final effluent reached neutral condition. Phytotoxicity of the effluents obtained in each process was evaluated by germination index. Their results showed that phytotoxicity was dramatically reduced for four plants species in final effluent. The sequence of the processes was assessed in case of COD removal. The results indicated that the sequence of processes (PM + EF + SR) was the best choice for PPW treatment. The sludge of PM and EF was evaluated by FTIR analysis. Finally, these combinations of the chemical, electrochemical and photochemical processes were proposed as an excellent option for treatment of PPW. (C) 2016 Elsevier B.V. All rights reserved.