利用BAF提取糖蜜酒精废液中钾的实验研究  

Experimental Study on BAF to Extract Potassium from Molasses Alcohol Wastewater

作　　者：陆燕勤[1,2] 张学洪[1,2] 朱义年[1,2] 朱竹江[1] 张琴[1,2] 

机构地区：[1]桂林工学院资源与环境工程系 [2]广西环境工程与保护评价重点实验室,广西桂林541004

出　　处：《环境科学与技术》2009年第7期46-49,共4页Environmental Science & Technology

基　　金：广西环境工程与保护评价重点实验室研究基金资助(桂科能0701Z009);广西高校人才小高地环境工程创新团队基金资助

摘　　要：研究α-改性沸石对钾的吸附性能,分离和提取钾元素。通过静态试验,得出了改性沸石对K+的吸附容量为36.13mg/g沸石,当温度为25℃时,吸附等温线可以用Freundlich吸附公式来进行拟合,相关系数R2>0.983。利用α-改性沸石为介质的BAF反应器对糖蜜酒精废液进行提钾的实验研究,结果表明,在温度25～30℃,进水COD浓度1500～1800mg/L,NH3-N浓度180～210mg/L,钾(K+)浓度0.65～0.75g/L、pH7～9,水力负荷3.0m3(/m.2d)和气水比为3:1条件下,系统稳定运行,钾的吸附率达90%以上,洗脱富钾液中钾(K+)浓度可达38g/L。为生态型提钾的工程应用奠定基础。Zeolite absorption ability of potassium as well as separation and extraction of potassium from molasses alcohol wastewater were studied. Static experiment showed that potassium absorption volume was 36.13mg/g zeolite, and adsorption isotherm can be well fit with Freundlich equation when temperature was 25℃, with relative coefficient above 0.983. The study on BAF to extract potassium from molasses alcohol wastewater using zeolite showed that the adsorbent rate of potassium was more than 90% and potassium concentration of elution liquid reached 38g/L under the conditions of temperature 25-30℃, influent COD concentration 1,500-1,800mg/L, NH3-N concentration 180-210mg/L, K2O concentration 0.65-0.75g/L, pH 7-9, hydraulic load 3.0m^3/（m^2·d） and air-to-water rate 3：1. The study will provide experimental basis for the application of potassium extraction.

关 键 词：糖蜜酒精废液 BAF α-改性沸石 钾 

分 类 号：X703[环境科学与工程—环境工程]