| 第 49 卷第 4 期 |  | Vol. 49 No. 4 | | 2019 年 8 月 | Aug 2019 |
|
所屬欄目：安全與環(huán)保
ZnSO4絮凝-電催化氧化組合工藝預處理甲基托布津生產(chǎn)廢水 |
| 馬 林1，2，張 燕1，2，陳 燦1，2，秦岳軍1，2，干興利1，2，劉 歡1，2，鐘若楠1，2，張海濤1，2
（1. 湖南化工研究院有限公司 國家農藥創(chuàng )制工程技術(shù)研究中心，湖南 長(cháng)沙410014；2. 農用化學(xué)品湖南省重點(diǎn)實(shí)驗室，湖南 長(cháng)沙 410014） |
| 摘 要：采用ZnSO4絮凝-電催化氧化組合工藝預處理甲托生產(chǎn)廢水，探討了ZnSO4固體投加量、絮凝沉淀時(shí)間對甲托混水COD去除效果。在ZnSO4投加量為3‰，絮凝沉淀時(shí)間為30 min時(shí)，甲托混水的COD由24 100 mg·L-1降至15 482 mg·L-1，COD去除率為36%。ZnSO4絮凝沉淀后，將濾液電催化氧化，重點(diǎn)考察了投加復合催化劑、電解電流、電解時(shí)間對電催化氧化的處理效果。投加復合催化劑后，形成三維電催化氧化，傳質(zhì)效率大大提高，能耗降低。在電解電流為10 A，電解時(shí)間為4 h條件下，電催化氧化處理后，COD降至7 200 mg·L-1，COD去除率達到70%，B／C提高至0.41，廢水可生化性大幅提高。 |
| 關(guān)鍵詞：ZnSO4絮凝；電催化氧化；甲托生產(chǎn)廢水 |
| 中圖分類(lèi)號：X703 文獻標識碼：A 文章編號：1009-9212（2019）04-0059-05 |
|
| Pretreatment of Wastewater from Thiophanate-methy Production by a Process of ZnSO4 Flocculating Combined with Electrocatalytic Oxidation |
| MA Lin1,2, ZHANG Yan1,2, CHEN Can1,2, QIN Yue-jun1,2, GAN Xing-li1,2, LIU Huan1,2, ZHONG Ruo-nan1,2, ZHANG Hai-tao1,2
(1. National Engineering Research Center for Agrochemicals, Hunan Research Institute of Chemical Industry, Changsha 410014, China; 2.Hunan Province Key Laboratory for Agrochemicals, Changsha 410014, China) |
| Abstract：Based on electrocatalytic oxidation, wastewater from thiophanate-methyl production was pretreated by a process of ZnSO4 flocculating combined with electrocatalytic oxidation. The proportion of ZnSO4 and the time of flocculation precipitation were investigated. The results showed that under the ZnSO4 addition of 3‰ and a flocculation precipitation time of 30 min, COD of wastewater was reduced from 24 100 mg·L-1 to 15 482 mg·L-1, and the COD removal rate was 36%. After ZnSO4 flocculating precipitation, the filter was oxidized electrically catalyzed. The addition of composite catalyst, electrolysis current, and electrolysis time were investigated. With the addition of composite catalyst, three-dimensional electrode electrocatalytic oxidation formed, and mass transfer efficiency was greatly improved, and energy consumption was reduced. The electrolysis current of 10 A, and electrolysis time of 4 h were the electrocatalytic oxidation's best conditions. Under these obtained best conditions, COD was dropped to 7 200 mg·L-1, COD removal rate reached 70%, B/C increased to 0.41. The bioavailability of thiophanate-methyl wastewater increased significantly. |
| Key words：ZnSO4 flocculation precipitation; electrocatalytic oxidation; thiophanate-methyl wastewater |
|
作者簡(jiǎn)介：馬 林（1985-），女，湖南桃源人，助理研究員，碩士，研究方向：污水處理與水污染控制工程（E-mail：matiee6666@163.com）。
|
收稿日期：2019-07-18
|
|