Life Cycle Assessment and Net Energy Analysis of an Integrated Hydrothermal Liquefaction-Anaerobic Digestion of Single and Mixed Beverage Waste and Sewage Sludge

被引：0
作者：
Adedeji, Oluwayinka M. [1 ,2 ]
Aboagye, Emmanuel A. [3 ]
Oladoye, Peter Olusakin [4 ]
Bauer, Sarah K. [5 ]
Jahan, Kauser [1 ]
机构：
[1] Department of Civil and Environmental Engineering, Rowan University, 201 Mullica Hill Road, Glassboro, 08028, NJ
[2] Pennsylvania Department of Environmental Protection, Bureau of Clean Water, Harrisburg, 7105, PA
[3] Department of Chemical and Biological Engineering, Princeton University, 1 Nassau Hall, Princeton, 08544, NJ
[4] Department of Chemistry and Biochemistry, Florida International University, Miami, 11200 SW 8th St, Miami, 33199, FL
[5] Department of Environmental and Civil Engineering, Mercer University, 1501 Mercer University Drive, Macon, 31207, GA
来源：
Chemosphere | 2024年 / 363卷
关键词：
Anaerobic digestion; Co-hydrothermal liquefaction; Life cycle assessment; Net energy ratio;
D O I：
10.1016/j.chemosphere.2024.142991
中图分类号：
学科分类号：
摘要：
The conversion of biomass to bioenergy is one of the approaches to creating a sustainable society. In this study, the life cycle assessment and the net energy analysis of converting mixed sewage sludge and beverage waste into bioenergy via a combined hydrothermal liquefaction-anaerobic digestion (HTL-AD) system was carried out. Primary sludge (PS), winery rose lees (RL), brewery Trub (BT), the mixture of brewery trub and primary sludge (BTPS) and the mixture of winery rose lees and primary sludge (RLPS) were the feedstocks considered. Efficient energy utilization [in form of net energy ratio (NER)], and environmental emissions were evaluated. The NER of BT (2.07) and RL (1.76) increased when mixed with PS (3.18) to produce BTPS (3.20) and RLPS (2.85). Also, the HTL phase of the combined HTL-AD system produced a greater NER than the AD phase in BT, BTPS, and PS and vice-versa in RL and RLPS. Six environmental impact categories were studied namely global warming, terrestrial acidification, ionizing radiation, terrestrial ecotoxicity, human carcinogenic toxicity, and human non-carcinogenic toxicity. RL produced the greatest environmental impact while BTPS produced the least impact, thus indicating the advantage of feedstock combination. This study shows that the combination of feedstocks for bioenergy production in an HTL-AD system does not only increase the quality and quantity of products but also increases the overall NER as well as reducting the environmental impacts. The study also proved that an integrated HTL-AD system is an energy efficient system with greater resource utilization and less environmental footprint than the constituent systems. © 2024 Elsevier Ltd
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