Government College of Technology, Coimbatore, Tamil Nadu, India.
Government College of Engineering, Bodinayakkanur, Tamil Nadu, India.
Environ Sci Pollut Res Int. 2019 Apr;26(11):11371-11386. doi: 10.1007/s11356-019-04556-w. Epub 2019 Feb 23.
Microbial-derived biodiesel was tested on a lab scale CI diesel engine for carrying out exhaust emission and performance characteristics. The performance, emission, and combustion characteristics of a single cylinder four stroke fixed compression ratio engine when fueled with microbial bio-diesel and its 10-30% blends with diesel (on a volume basis) were investigated and compared with conventional diesel. The bio-diesel was obtained from microbes which were grown by combining distillery spent wash with lignocellulosic hydrolysate at nutrient deprived conditions. The microbes consumed the wastes and converted the high strength waste water into lipids, which were trans-esterified to form bio-diesel. Testing of microbial bio-diesel blends with ordinary diesel at different loading pressures and the emission characteristics were compared. Results indicate that with increasing of the blends, reduction of HC and CO emissions were observed, whilst brake thermal efficiency maxed out at 20% blending. Further increase of blends showed a tendency of increasing of both emissions in the exhaust stream. The Brake Specific Fuel consumption was observed to decline with blending until 20% and then increased. The nitrogen oxide emissions, however, were found to increase with increasing blend ratios and reached a maximum at 20% blend. The escalation of HC, CO, CO, and NOx emissions was also observed at higher blending ratios and higher engine loads. The performance studies were able to show that out of the three blends of biodiesel, 20% biodiesel blend was able to deliver the best of reduced hydrocarbon and carbon monoxide emissions, whilst also delivering the highest Brake thermal efficiency and the lowest Brake Specific Fuel consumption.
微生物衍生的生物柴油在实验室规模的 CI 柴油发动机上进行了尾气排放和性能特性测试。研究了在单缸四冲程固定压缩比发动机上以微生物生物柴油及其与柴油的 10-30%混合燃料（按体积计）为燃料时的性能、排放和燃烧特性，并与传统柴油进行了比较。生物柴油是从微生物中获得的，这些微生物是在营养缺乏的条件下将酿酒厂废水与木质纤维素水解物结合生长的。微生物消耗废物，并将高浓度废水转化为脂质，然后将脂质进行酯交换以形成生物柴油。在不同加载压力下测试了微生物生物柴油与普通柴油的混合物，并比较了排放特性。结果表明，随着混合物的增加，HC 和 CO 的排放减少，而在 20%混合时制动热效率达到最大值。进一步增加混合物的比例会导致废气中排放物的增加。制动比油耗随着混合比的增加而下降，直到 20%，然后增加。然而，氮氧化物排放量随着混合比的增加而增加，并在 20%混合时达到最大值。在更高的混合比和更高的发动机负荷下，也观察到 HC、CO、CO 和 NOx 排放的增加。性能研究表明，在三种生物柴油混合物中，20%的生物柴油混合物能够在降低碳氢化合物和一氧化碳排放方面表现最佳，同时还能提供最高的制动热效率和最低的制动比油耗。
