Preliminary study at lipids extraction technology from municipal sludge by organic solvent
With the development of our society,waste water treatment ratio is going higher and as a result there are more and more sewage sludge.Because of its high water content,containing heavy metal and some virus,sewage sludge has been a serious environmental problem.Considering the energy crisis and serious environmental pollution,and because of the fact that there are considerable lipids in sewage sludge,which can be turned into biodiesel by esterification or transesterification,we proposed a new solution for sewage sludge problem which is to make biodiesel from sewage sludge.The whole process is divided into three steps:heat-drying,extraction of lipids and transesterification.In this research,we are going to discuss the extraction step.We extracted lipids from sewage sludge by referring to the national standard for food.We used many organic solvents such as ether,hexane,acetone,chloroform-methanol.Then we will discuss that which solvent will be more favorable to extract the lipids from the sludge by measuring the quantity of the lipids we have obtained.After the experiment,we have found that as to the single solvent extraction,bromo-propane solvent has the highest extraction effect,the other sort of the solvents are ether,toluene,N-hexane,petroleum ether.While,as to mixed solvent extract,the hexane-ethanolthe solvent has higher efficiency than other mixed solvent.The results show that mixed solvent has higher efficiency than the single solvent and the polar solvents are easier to extract more lipids than the non-polar solvents from the sludge.
sewage sludge organic solvent biodiesel lipids extraction
Fenfen Zhu Luyao Zhao Zhaolong Zhang Huimin Jiang
School of Environment & Natural Resources, Renmin University of China School of Resources Environment & Tourism, Capital Normal University
国际会议
The Seventh International Conference on Waste Management and Technology(第七届固体废物管理与技术国际会议(ICWMT7))
北京
英文
352-356
2012-09-05（万方平台首次上网日期，不代表论文的发表时间）