Natthaphon Ardhan, Assoc. Prof. Dr. Pensiri Tongpadungrod, Dr. Warinthorn Songkasiri, Assoc. Prof. Dr. Thitiporn Suttikul, Prof. Dr. Chantaraporn Phalakornkule
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Upgrading of Biogas Generated from Shrimp Processing Effluent Using Vacuum Pressure Swing Adsorption
In this study, a field study was presented on upgrading the biogas generated from shrimp processing wastewater (sfw-biogas) that had H2S of 5000–6000 ppm, CO2 13–32 %, and CH4 68–87 % using the oxidative absorption of H2S in iron-chelated solution in series with vacuum pressure swing adsorption (VPSA). The regeneration of the adsorbent treating sfw-biogas required a shorter evacuation time than that of treating the biogas with a typical composition of 60 % CH4 (t-biogas). The VPSA process treating sfw-biogas required half the evacuation time and 26 % lower energy consumption. However, the methane recovery decreased from 80 % for t-biogas to 65 % for sfw-biogas.
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