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一步法中用聚氯化铝自组装有机膨润土处理分散染料生产废水。

Enhanced treatment of dispersed dye-production wastewater by self-assembled organobentonite in a one-step process with poly-aluminium chloride.

机构信息

Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang, 310058, China.

Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Zhejiang University, Hangzhou, 310058, China.

出版信息

Sci Rep. 2017 Jul 28;7(1):6843. doi: 10.1038/s41598-017-07333-2.

DOI:10.1038/s41598-017-07333-2
PMID:28754969
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5533790/
Abstract

Organobentonite has been successfully applied in industrial wastewater treatment. However, the solid-liquid separation in wastewater treatment still needs improvement. This study presents an enhanced approach with high removal efficiency and short separation time for dispersed dye-production wastewater using self-assembled organobentonite in a one-step process with poly-aluminium chloride (PAC). The enhanced effects of PAC on wastewater treatment by organobentonite were comprehensively evaluated. Following the primary decontamination by the self-assembled organobentonite, the removal efficiency for dispersed dye-production wastewater was strengthened with PAC coagulation. The removal rates of TOC and organic pollutants were 55.0% and 63.5%, respectively, with the PAC-enhanced approach and were 1.3- and 1.6-fold higher, respectively, than those with the self-assembled organobentonite approach. The combination of PAC with self-assembled organobentonite was able to break the stability of the organobentonite suspension and enlarge the floc size, and thus reduce the solid-liquid separation time from 30 min to 10 min. Additionally, this enhanced approach could improve the biodegradability of wastewater with the BOD/COD ratio increasing from 0.22 to 0.39, which was 4.1-fold higher than that of only organobentonite in a one-step process. Therefore, the PAC-enhanced approach could be a promising technology for wastewater pretreatment in practical industrial applications.

摘要

有机膨润土已成功应用于工业废水处理。然而，废水处理中的固液分离仍需改进。本研究提出了一种强化方法，使用自组装有机膨润土和聚合氯化铝 (PAC) 一步法处理分散染料生产废水，具有高效去除率和短分离时间。综合评价了 PAC 对有机膨润土处理废水的增强效果。在自组装有机膨润土初步去污后，PAC 混凝强化了分散染料生产废水的去除效率。PAC 增强法的 TOC 和有机污染物去除率分别为 55.0%和 63.5%，分别比自组装有机膨润土法高 1.3 倍和 1.6 倍。PAC 与自组装有机膨润土的结合能够打破有机膨润土悬浮液的稳定性，增大絮体粒径，从而将固液分离时间从 30 分钟缩短至 10 分钟。此外，该强化方法可以提高废水的可生物降解性，BOD/COD 比从 0.22 增加到 0.39，是一步法中仅使用有机膨润土的 4.1 倍。因此，PAC 增强法可能是实际工业应用中废水预处理的一种有前途的技术。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/288b/5533790/a7abc8e3991f/41598_2017_7333_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/288b/5533790/53c35c785cd8/41598_2017_7333_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/288b/5533790/6a937194cae8/41598_2017_7333_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/288b/5533790/3adbf63de2f0/41598_2017_7333_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/288b/5533790/124fa4b88e3c/41598_2017_7333_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/288b/5533790/bd4a6b0c2735/41598_2017_7333_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/288b/5533790/cf5a178b6358/41598_2017_7333_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/288b/5533790/f2f10a15903f/41598_2017_7333_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/288b/5533790/a7abc8e3991f/41598_2017_7333_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/288b/5533790/53c35c785cd8/41598_2017_7333_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/288b/5533790/6a937194cae8/41598_2017_7333_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/288b/5533790/3adbf63de2f0/41598_2017_7333_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/288b/5533790/124fa4b88e3c/41598_2017_7333_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/288b/5533790/bd4a6b0c2735/41598_2017_7333_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/288b/5533790/cf5a178b6358/41598_2017_7333_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/288b/5533790/f2f10a15903f/41598_2017_7333_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/288b/5533790/a7abc8e3991f/41598_2017_7333_Fig8_HTML.jpg

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