铁碳微电池预处理糖蜜废水效果分析及对厌氧产气性能影响  

Study on pretreatment of molasses wastewater with iron carbon microcell and its effect on anaerobic gas generation

作　　者：李金平[1] 任守军[1,2] 孙永明[2] 孔晓英[2] 袁振宏[2] 

机构地区：[1]兰州理工大学甘肃省生物质能与太阳能互补供能系统重点实验室,甘肃兰州730050 [2]中国科学院广州能源研究厨可再生能源国家重点实验室,广东广州510640

出　　处：《兰州理工大学学报》2018年第1期52-57,共6页Journal of Lanzhou University of Technology

基　　金：科技部国际合作项目(2015DFA60460)

摘　　要：糖蜜酒精废水中高浓度硫酸盐抑制了厌氧发酵产甲烷的过程,且其高色度高腐蚀性的特点,在其处理达标排放方面也有诸多不利影响.铁碳微电池技术利用微电池原理可以消耗废水中相当部分氢离子,降低废水腐蚀性,还可以改变部分有机物形态和结构,降低废水的色度,提高废水的可生化性,并且溶解的铁离子还可以降低高浓度的硫酸盐对厌氧发酵的抑制作用.研究结果表明:处理时间到150min时,五日生化需氧量与化学需氧量之比从最初的0.14提高到0.56,铁离子浓度达到9 585mg/L.取150min时的糖蜜酒精废水进行厌氧发酵,与对照组进行对比发现累计产甲烷率为451.0mL/gVS明显高于对照组293.0mL/gVS.色度的去除率从30min的45.2%开始不断增加,到150min去除率达到72%以上.Presence of a high-concentration of sulfate in molasses alcohol wastewater makes the anaerobic fermentation gas-generation process inhibited,with the feature of high chroma and high corrosivity,so that making a lot of disadvantageous effect on the treatment of emissions in compliance with standards using micro-battery principle,iron carbon microcell technology can consume a considerable part of hydrogen ions in wastewater,reduce wastewater corrosivity,change the morphology and structure of a portion of organic matter reduce the chroma of the wastewater,improve the wastewater biodegradability,and reduce the inhibitory effect of high-concentrations of sulfate on the anaerobic fermentation due to the existence of dissolved iron ion.The result shows that when the pretreatment time reaches 150 min,the ratio of five-day biochemical oxygen demand to chemical oxygen demand will reached 0.56 from the initial 0.14 and the iron ion concentration will reach 9 585 mg/L.At this moment,the anaerobic fermentation of molasses alcohol wastewater is conducted and its result is compared with that of reference group.It is found that the cumulative methane production rate will be 676.475 mL/gVS that obviously higher than that of reference group 588.125 mL/gVS.The removal rate of color will begin to increase continuously from 45.2%at 30 min until to 72%at 150 min.

关 键 词：糖蜜酒精废水 铁碳微电池 产气性能 

分 类 号：TK6[动力工程及工程热物理—生物能]