{"title":"Biomethane production using goat manure and cheese whey: statistical analysis of the effect of mixture composition","authors":"","doi":"10.1007/s43153-024-00442-2","DOIUrl":null,"url":null,"abstract":"<h3>Abstract</h3> <p>Lignocellulosic biomass and agricultural residues rich in carbohydrates, lipids, and proteins are promising sources for renewable energy production, particularly in the field of biofuel. Goat manure (GM) is a suitable raw material for the anaerobic digestion process owing to its high total nitrogen content, besides providing stability to fermentation. However, its utilization results in a relatively low biogas production yield. This yield can be significantly increased by co-digesting animal manure with co-substrates such as cheese whey (CW). Therefore, this study applied the Simplex Lattice experimental design to verify the biomethane production through different mixture concentrations of goat manure and cheese whey using bench reactors in batch mode. The volumetric compositions (CW<sub>100</sub>/GM<sub>0</sub>, CW<sub>75</sub>/GM<sub>25</sub>, CW<sub>50</sub>/GM<sub>50</sub>, CW<sub>25</sub>/GM<sub>75</sub>, CW<sub>0</sub>/GM<sub>100</sub>) were evaluated by adjusting linear and quadratic models. The results presented COD removal efficiencies between 40.07 and 63.73% and total volatile solids removal between 22.87 and 58.99%. According to the statistical analysis of the Simplex Lattice design, co-digestion showed favorability for methane production compared to goat manure alone. Furthermore, the maximum methane production yield (MY<sub>COD</sub>) was 319.89 mL-CH<sub>4</sub>/gCOD, with a productivity rate (MYPR) of 3.39 mL-CH<sub>4</sub>/gCOD.d. These maximum values were observed in the CW<sub>75</sub>/GM<sub>25</sub> condition. The quadratic model exhibited the best fit for the design adopted.</p>","PeriodicalId":9194,"journal":{"name":"Brazilian Journal of Chemical Engineering","volume":"11 1","pages":""},"PeriodicalIF":1.5000,"publicationDate":"2024-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Brazilian Journal of Chemical Engineering","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1007/s43153-024-00442-2","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Lignocellulosic biomass and agricultural residues rich in carbohydrates, lipids, and proteins are promising sources for renewable energy production, particularly in the field of biofuel. Goat manure (GM) is a suitable raw material for the anaerobic digestion process owing to its high total nitrogen content, besides providing stability to fermentation. However, its utilization results in a relatively low biogas production yield. This yield can be significantly increased by co-digesting animal manure with co-substrates such as cheese whey (CW). Therefore, this study applied the Simplex Lattice experimental design to verify the biomethane production through different mixture concentrations of goat manure and cheese whey using bench reactors in batch mode. The volumetric compositions (CW100/GM0, CW75/GM25, CW50/GM50, CW25/GM75, CW0/GM100) were evaluated by adjusting linear and quadratic models. The results presented COD removal efficiencies between 40.07 and 63.73% and total volatile solids removal between 22.87 and 58.99%. According to the statistical analysis of the Simplex Lattice design, co-digestion showed favorability for methane production compared to goat manure alone. Furthermore, the maximum methane production yield (MYCOD) was 319.89 mL-CH4/gCOD, with a productivity rate (MYPR) of 3.39 mL-CH4/gCOD.d. These maximum values were observed in the CW75/GM25 condition. The quadratic model exhibited the best fit for the design adopted.
期刊介绍：
The Brazilian Journal of Chemical Engineering is a quarterly publication of the Associação Brasileira de Engenharia Química (Brazilian Society of Chemical Engineering - ABEQ) aiming at publishing papers reporting on basic and applied research and innovation in the field of chemical engineering and related areas.
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