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首页> 外文会议>Forest industry wastewater VIII >Removal of colour from a kraft pulp and paper mill effluent in Kenya using a combination of electrochemical method and phosphate rock
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Removal of colour from a kraft pulp and paper mill effluent in Kenya using a combination of electrochemical method and phosphate rock

机译：结合电化学方法和磷酸盐岩去除肯尼亚牛皮纸浆和造纸厂废水中的颜色

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A study was undertaken to remove colour from a kraft mill's treated effluent in Kenya and determine the suitability of phosphate rock to replace wood ash during the electrochemical process. The electrochemical method alone, electrochemical combined with alum (ELCAL), wood ash leachate (ELCAS) and phosphate rock (ELPHOS) solutions at a rate of 165 to 1,000g/m~3 were tested. Effluent characteristics were determined after complete removal of colour. Same reduction rates of TS (85%) and TSS (89%) were recorded by ELCAS and ELPHOS. However, ELPHOS removed more COD (86 to 91%) and more BOD (85 to 92%) than ELCAS. Furthermore, the pH of ELPHOS treated solution was 9.3, within the Kenya Local Government's allowable limit. Power reduction with ELCAS and ELPHOS varied between 53 to 73% and 49 to 69% respectively but the difference was not statistically significant. Overnight aeration further improved the quality of ELCAS and ELPHOS treated effluent, reducing BOD and COD values to 0 mg/l. ELPHOS cost ($0.29/m~3) was nevertheless three times higher than that of ELCAS ($0.10/m~3), mainly because of free wood ash. ELPHOS did not also increase effluent phosphorus. It was therefore recommended that various ways be explored in making ELPHOS more economical to replace ELCAS.
机译：进行了一项研究，目的是从肯尼亚的硫酸盐法制浆厂处理过的废水中去除颜色，并确定在电化学过程中磷酸盐岩是否适合替代木灰。测试了单独的电化学方法，与明矾（ELCAL），木灰浸出液（ELCAS）和磷酸盐岩（ELPHOS）溶液的电化学组合，其混合速率为165至1,000g / m〜3。完全去除颜色后测定出水特性。 ELCAS和ELPHOS记录的TS（85％）和TSS（89％）降低率相同。但是，与ELCAS相比，ELPHOS去除了更多的COD（86％至91％）和BOD（85％至92％）。此外，经ELPHOS处理的溶液的pH值为9.3，在肯尼亚地方政府的允许范围内。 ELCAS和ELPHOS的功耗降低分别在53％至73％和49％至69％之间变化，但差异无统计学意义。通宵通气进一步改善了ELCAS和ELPHOS处理的废水的质量，将BOD和COD值降至0 mg / l。 ELPHOS的成本（0.29美元/ m〜3）比ELCAS的成本（0.10美元/ m〜3）高三倍，这主要是由于游离的木灰。 ELPHOS也不增加污水磷。因此，建议探索各种方法以使ELPHOS更经济地替代ELCAS。

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