Clean Technologies and Environmental Policy ( IF 4.3 ) Pub Date : 2020-01-03 , DOI: 10.1007/s10098-019-01799-6 Yasir Abbas , Farrukh Jamil , Sikander Rafiq , Moinuddin Ghauri , M. Shahzad Khurram , Muhammad Aslam , Awais Bokhari , Abrar Faisal , Umer Rashid , Sining Yun , Muhammad Mubeen
Abstract
The current work reports experimental outcomes about anaerobic digestion (AD) of the organic fraction of catering solid waste to produce biogas and methane yield and solidity of the entire system. The possibility of developing AD as an efficient technique for food waste management has also been considered. Inoculation is an established technique to enhance biogas yield through digested sludge, rumen fluid, and slurry recirculation; although this method is proven on cattle manure, however, it is not well studied on food waste. The current study investigates the use of animal intestinal waste as inoculums to enhance biogas yield of food waste. The findings are benchmarked with cattle manure employing known digester materials of carbon steel, aluminum alloy, and at anaerobic mesophilic conditions. The inoculation was varied up to 30% by mass of the substrate materials in each case. The research finds that food waste inoculation was up to 30% using carbon steel reactor under mesophilic temperature conditions (30 ± 1 °C). The food waste produced biogas at a faster rate with a higher yield compared to cattle manure in all digester materials. The biogas yield kept increasing with increasing inoculum ratio reaching optimal at 30% in the case of both food waste and cattle manure with all the digester materials.
Graphic abstract
中文翻译:
通过接种来平衡固体废物生物量,以提高沼气产量
摘要
目前的工作报告了关于餐饮固体废物有机部分厌氧消化(AD)以产生沼气和甲烷的产率以及整个系统的固体性的实验结果。还考虑了将AD发展为一种有效的食物垃圾管理技术的可能性。接种是通过消化的污泥,瘤胃液和浆液再循环提高沼气产量的一项成熟技术。尽管这种方法已在牛粪中得到证明,但是,对食物浪费的研究还不够。当前的研究调查了使用动物肠道废物作为接种物来提高食物垃圾的沼气产量。研究结果以牛粪为基准,牛粪采用了已知的碳钢,铝合金消化器材料,并在厌氧中温条件下使用。在每种情况下,接种物的变化最多为基材材料的30质量%。研究发现,在中温温度条件下(30±1°C),使用碳钢反应器可将食物垃圾的接种率提高至30%。与所有消化器材料中的牛粪相比,食物垃圾产生沼气的速度更快,产量更高。对于餐厨垃圾和所有消化材料的牛粪,沼气产量都随着接种率的增加而达到30%的最佳水平。
图形摘要