Critical factors influence on acidogenesis towards volatile fatty acid, biohydrogen and methane production from the molasses-spent wash,Bioresource Technology

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Critical factors influence on acidogenesis towards volatile fatty acid, biohydrogen and methane production from the molasses-spent wash
Bioresource Technology ( IF 9.7 ) Pub Date : 2022-06-09 , DOI: 10.1016/j.biortech.2022.127446
T K Vanitha ₁ , Shikha Dahiya ₁ , Yaswanth Lingam ₂ , S Venkata Mohan ₁

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The study explored the spent wash valorisation into value added biobased products viz. volatile fatty acids (VFAs), biohydrogen (bio-H), methane (CH) and biohythane (bio-H-CNG) based on eight selected parameters employing design of experiment (DOE) approach. Selectively enriched biocatalyst showed marked influence on the production of acidogenic products (bio-H and VFA) while untreated inoculum resulted in higher CH and bio-H-CNG generation. CaCO showed potential for butyric acid (H) production while NaCO specifically yielded higher acetic acid (H) when supplemented as buffering agents. Higher degree of acidification (DOA; 49.8%) was observed at lower organic load (OL; 30 g/L). Biogas production and profile was influenced by OL, enrichment of biocatalyst and supplemented buffering agent. Higher OL related to higher bioproduct production, while yields of the respective products were higher at lower OL.

中文翻译：

影响糖蜜废洗液中挥发性脂肪酸、生物氢和甲烷产酸作用的关键因素

该研究探索了将废洗涤物增值为增值生物基产品，即。挥发性脂肪酸（VFA）、生物氢（bio-H）、甲烷（CH）和生物乙烷（bio-H-CNG）基于采用实验设计（DOE）方法选定的八个参数。选择性富集的生物催化剂对产酸产物（bio-H 和 VFA）的产生显示出显着影响，而未经处理的接种物则导致更高的 CH 和 bio-H-CNG 生成。 CaCO3 显示出产生丁酸 (H) 的潜力，而 Na2CO3 作为缓冲剂补充时，特别会产生更高的乙酸 (H)。在较低的有机负荷（OL；30 g/L）下观察到较高的酸化程度（DOA；49.8%）。沼气产量和分布受到 OL、生物催化剂富集和补充缓冲剂的影响。较高的 OL 与较高的生物产品产量相关，而较低的 OL 则相应产品的产量较高。

更新日期：2022-06-09

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