摘要
以乳化油配水为对象,研究了柠檬酸盐扩大UV/Fenton工艺的适用pH值范围与强化出水可生化性及与活性污泥法联用的效果.结果表明,柠檬酸盐可将UV/Fenton法的适用pH值范围扩大至4～8,且能提高UV/Fenton处理出水的可生化性.UV/Fenton处理后,原水BOD5/COD由0.02提高到0.32,投加1.0mmol/L柠檬酸钠后提高至0.53.UV/Fenton处理与经1.0mmol/L柠檬酸钠强化UV/Fenton处理出水经8h生物处理,COD去除率分别为78.7%,96.0%.柠檬酸钠浓度从0增加至1.0mmol/L时,经UV/Fenton处理过的出水再经生物处理出水的COD由293mg/L降低至48mg/L;继续增大时,COD基本保持不变.柠檬酸钠强化UV/Fenton处理可扩大pH值范围,改善废水的可生化性.
In the UV/Fenton process（UFP） treating artificial emulsion wastewater,the effects of citrate addition on the applicable pH range and effluent biodegradability were systematically investigated.In the citrate enhanced UV/Fenton process（CE-UFP）,the applicable pH range was broadened to 4～8.When CE-UFP was carried out under 1.0 mM initial citrate concentration,the effluent BOD/COD ratio increased to 0.53,which is much higher than that of 0.32 with no citrate addition.When the effluent of CE-UFP and UFP were further separately treated with 8-hour biological treatment,the respective COD removal efficiencies were 78.7.0% and 96.0%.When 0～1.0 mM citrate was dosed at CE-UFP stage,the effluent COD after subsequent biological treatment may decrease from 293mg/L to 48mg/L,while no further decrease was observed with higher citrate dosage.All these results clearly indicate citrate can broaden the applicable pH range of UFP and enhance the biodegradability.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2011年第3期367-370,共4页
China Environmental Science
基金
国家水体污染控制与治理科技重大专项(2008ZX07211-004)
深圳市科技计划项目(SY200806260019A)
