首页> 外文会议>Air and Waste Management Association annual conference and exhibition >Technology Development for Utilizing Trap Grease and Sewer Grease for Biodiesel Production
【24h】

Technology Development for Utilizing Trap Grease and Sewer Grease for Biodiesel Production

机译:利用捕集油脂和下水道油脂生产生物柴油的技术开发

获取原文
获取外文期刊封面目录资料

摘要

Fats, oils and greases (FOG) in the wastewater stream have long been a nuisance to the environment because they clog sewer pipes, causing overflows and damages. FOG can be classified as trap grease if obtained directly from food services, or sewer grease if mixed with FOG in the sewer system. This paper evaluated the technical feasibility and several sustainability parameters of converting trap/sewer grease into biodiesel. Both sewer and trap grease have FFA levels higher than the acceptable level (15-20%) of the current biodiesel industry. Due to emulsion, the lipid fraction of the sewer grease cannot be directly obtained by heating. Two innovative technologies, glyceroloysis and in-situ transesterification, were tested to make biodiesel from these FOGs. For trap grease, the results of glycerolysis showed that crude glycerin was effective in reducing the FFA% to < 1 wt%, with an optimum condition of 230 °C for 150 min and 1:1 molar ratio between glycerin and FFA. The study on the time series of the mono-, di-, tri-glycerides (MAG, DAG, TAG), FFA and glycerin was conducted to better understand the reaction mechanisms. For sewer grease, a direct transesterification process (in-situ conversion) was developed to extract the lipid and make biodiesel in one step. The optimum condition was determined as 20% (of dry sewer grease) H2SO4, 65 °C and 7hr, which gave a 85.43% extraction rate (biodiesel+unreacted FOG vs. total FOG) and a 76% FOG-to-biodiesel conversion rate (biodiesel vs. total FOG) were achieved.
机译:长期以来,废水流中的油脂,油脂已阻塞了下水道,造成溢流和损坏,长期以来一直困扰着环境。如果直接从食品服务获得,则FOG可以归类为捕集油脂,如果在下水道系统中与FOG混合,则可以归为下水道油脂。本文评估了将捕集阱/下水道油脂转化为生物柴油的技术可行性和几个可持续性参数。下水道油脂和捕集阱油脂的FFA含量均高于当前生物柴油行业的可接受水平(15-20%)。由于乳化,下水道油脂的脂质部分不能通过加热直接获得。测试了两种创新技术,即甘油水解和原位酯交换,以从这些FOG制备生物柴油。对于捕集油脂,甘油分解的结果表明,粗甘油可以有效地将FFA%降低至<1 wt%,最佳条件是在230°C的条件下保持150分钟,并且甘油和FFA的摩尔比为1:1。对甘油一酸酯,甘油二酸酯,甘油三酸酯,脂肪酸,脂肪酸和甘油的时间序列进行了研究,以更好地了解反应机理。对于下水道油脂,开发了一种直接酯交换过程(原位转化)以一步一步提取脂质和制备生物柴油的方法。确定最佳条件为20%(干污水油脂中的)H2SO4、65°C和7小时,其提取率为85.43%(生物柴油+未反应的FOG与总FOG的比)和76%FOG到生物柴油的转化率(生物柴油与总FOG)。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号