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首頁> 美國衛(wèi)生研究院文獻>Scientific Reports >Pilot-scale study on catalytic ozonation of bio-treated dyeing and finishing wastewater using recycled waste iron shavings as a catalyst
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Pilot-scale study on catalytic ozonation of bio-treated dyeing and finishing wastewater using recycled waste iron shavings as a catalyst

機譯：以再生廢鐵屑為催化劑的生物處理印染后整理廢水催化臭氧氧化的中試研究

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A pilot scale reactor with an effective volume of 2.93 m3 was built in-situ and run in both batch and continuous modes to investigate the removal for organic pollutants in bio-treated dyeing and finishing wastewater by heterogeneous catalytic ozonation under neutral pH with waste iron shavings as a catalyst. Experimental results showed that both running modes were able to reduce the chemical oxygen demand (COD) from 132–148 mg/L to a level below the discharge criteria (<80 mg/L) within 15–30 mins under several conditions. Specifically, significantly organic removal was observed with COD, soluble COD (sCOD) and dissolved organic carbon (DOC) decreased from the initial 165, 93 and 76 mg/L to 54, 28 and 16 mg/L respectively, when treated by 10.2 g-O3/min of ozone dosage at a hydraulic retention time of 30 mins under continuous mode. 80% proteins and 85% polysaccharides were removed with a decrease in their contribution to sCOD from 69% to 43%. Mineralization as well as conversion of high molecular organic compounds was observed through Gas Chromatography-Mass Spectrometer (GC-MS) & Liquid Chromatography-Mass Spectrometer (LC-MS) analysis, which led to a decrease of inhibitory effect from 29% to 25%, suggesting a reduction in the acute toxicity.
機譯：現(xiàn)場建造了一個有效容積為2.93 m 3 的中試規(guī)模反應器，并以分批和連續(xù)模式運行，以研究異相催化去除生物處理的印染后整理廢水中的有機污染物在中性pH下用廢鐵屑作為催化劑進行臭氧化。實驗結果表明，兩種運行模式都能在15-30分鐘內將化學需氧量（COD）從132-148 mg / L降低到排放標準（<80 mg / L）以下的水平。具體而言，當用10.2 g處理時，觀察到COD的有機物去除明顯，可溶性COD（sCOD）和溶解的有機碳（DOC）從最初的165、93和76μmg/ L分別降至54、28和16μmg/ L。在連續(xù)模式下，在30μmin的水力停留時間下，臭氧劑量為-O3 / min。去除了80％的蛋白質和85％的多糖，其對sCOD的貢獻從69％降至43％。通過氣相色譜-質譜儀（GC-MS）和液相色譜-質譜儀（LC-MS）分析觀察到了礦化以及高分子有機化合物的轉化，從而將抑制作用從29％降低至25％ ，提示急性毒性降低。

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