Bioprocesses for resource recovery from waste gases: Current trends and industrial applications

Approaches to mitigation of hydrogen sulfide during anaerobic digestion process – A review

“…In practice, the efficacy of energy or resource recovery in a treatment system is dependent upon the characteristics of the influent wastewater and process design, such as the capacity of a specific process or material to separate and selectively capture CO 2 and H 2 S from a gas mixture, primarily containing CO 2 , CH 4 (methane), and H 2 S [ 163 ]. Since methane can pass through and be recovered as an energy source, activated carbon and zeolites with improved porosity can improve the selectivity of both CO 2 and H 2 S [ 164 ].…”

Effects of Water Content and Irrigation of Packing Materials on the Performance of Biofilters and Biotrickling Filters: A Review

“…To achieve biodegradation of organic compounds, the packing material must be moistened with water saturated with nutrients and buffers [10]. Buffers are needed to maintain pH in biofilters, which should remain close to neutral, i.e., within the range of 6.0 to 7.5 [11]. Buffers that are commonly used in biofilters are CaCO 3 [12], solutions of NaOH [13,14], KH 2 PO 4 , KHPO 4 [15], etc.…”