Bioprocesses for resource recovery from waste gases: Current trends and industrial applications. (March 2022)

• Record Type: Journal Article
• Authors: Khanongnuch, Ramita; Abubackar, Haris Nalakath; Keskin, Tugba; Gungormusler, Mine; Duman, Gozde; Aggarwal, Ayushi; Behera, Shishir Kumar; Li, Lu; Bayar, Büşra; Rene, Eldon R.
• Is Part Of: Renewable & sustainable energy reviews. Volume 156(2022)
• Publication Date: 2022-03
• Subjects: Waste gas -- Bioreactors -- Volatile pollutants -- Syngas fermentation -- Elimination capacity -- Resource recovery; Renewable energy sources -- Periodicals; Power resources -- Periodicals; Énergies renouvelables -- Périodiques; Ressources énergétiques -- Périodiques; 333.794
• DOI: 10.1016/j.rser.2021.111926
• Languages: English
• ISSNs: 1364-0321

Abstract

Abstract: Air pollution is a topic of important global concern because it has contributed significantly to an increase in the earth's global warming potential and contributed to severe health and environmental impacts. In this review, the different bioreactor configurations commonly used for waste gas treatment, namely the biofilters, the biotrickling filters and the bioscrubbers, and their industrial applications were compared in terms of the type of inoculum, the packing material/media, removal efficiency and elimination capacity. Typically, biofilters are operated under the following range of operating conditions: gas residence time = 15–60 s; gas flow rate = 50–300, 000 m 3 h −1 ; temperature = 15–30 °C; pH = 6.0–7.5; filter area = 100–3000 m 2 ; relative humidity >95.0%; and removal efficiencies >75.0% depending on the waste gas composition and concentration. The biotechnological approaches for resource recovery, i.e., the conversion of C1 gaseous compounds (CO, CO2 and CH4 ) to liquified value-added products or biofuels have been discussed. From this review, it was evident that the performances of different aerobic, anoxic and/or anaerobic lab, pilot and full-scale bioreactors for waste gas treatment and resource recovery depend on the composition, the individual concentration of pollutants present in the waste gas and the gas flow rate. Although most of the research on product recovery from waste gas is rather limited to lab/pilot-scale studies, there are some key commercialized technologies that have proven to be economical at the full-scale. Thus, this review, comprehensively presents a complete overview of the current trends and limitations of conventional waste gas treatment systems, the benefits of novel bioreactor configurations and their potential to be applied for resource recovery from waste gases. Graphical abstract: Image 1 Highlights: Resource recovery from waste gas is promising under optimized process conditions. CO, CO2, CH4 and C1 containing compounds can be converted to value-added products. Using industrial waste gas as feedstock yields profit at the commercial scale. Downstream processing costs of the recovered products should be minimized. Selected/enriched dominant microorganisms improves bioprocess efficiency.