This review provides the alternative routes towards the valorization of dark H2 fermentation effluents that are mainly rich in volatile fatty acids such as acetate and butyrate. Various enhancement and alternative routes such as photo fermentation, anaerobic digestion, utilization of microbial electrochemical systems, and algal system towards the generation of bioenergy and electricity and also for efficient organic matter utilization are highlighted. What is more, various integration schemes and two-stage fermentation for the possible scale up are reviewed. Moreover, recent progress for enhanced performance towards waste stabilization and overall utilization of useful and higher COD present in the organic source into value-added products are extensively discussed.
Bibliographical noteFunding Information:
Dr Gopalakrishnan Kumar highly acknowledges the financial assistance from Ton Duc Thang University, Ho Chi Minh City, Vietnam. Dr Periyasamy Sivagurunathan acknowledges the financial support by the Korea Research Fellowship Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT [2017H1D3A1A01054358]. Guangyin Zhen acknowledges the financial support from the Science & Technology Innovation Action Plan of Shanghai under the Belt and Road Initiative , the Distinguished Professor in Universities of Shanghai (Oriental Scholar), the Shanghai Pujiang Program [17PJ1402100], and the Fundamental Research Funds for the Central Universities [40500-20101-222001].
All Science Journal Classification (ASJC) codes
- Applied Microbiology and Biotechnology