Preliminary Study on Microbial Desulfurization: Targeting H₂S Removal from Biogas with a Bioscrubber

Abstract

Bio-desulfurization generally involves the oxidation of sulfide to sedimented, sulfur compounds in microaerobic conditions and is applied at biogas power plants by the palm oil industry. In this work, microbes were screened from various sources, including microalgae, coal waste, Palm Oil Mill Effluent (POME), and cow manure. Screening of potential microbes was conducted using synthetic chemical reagent as the sulfur source. Decomposition of sulfur sources, like Na 2 S 2 O 3 , has been observed through microbial process whereas sulfur was separated into sedimented other sulfur compounds. Screenings were first conducted in modified growth media followed by screening with selective media for Thiobacillus. With the selective media, the treatment was continued with the addition of a sulfur source to see if the microbes are able to convert the sulfur to sulfuric acid or other sulfur compounds as sediment. The preferred microbe would be chosen and applied to the bioscrubber system at Terantam, Indonesia. This work could also be applicable to biogas generation from POME where H 2 S content is more than 1,200 ppm, which is corrosive to the biogas engine. Finally, we propose a two-step desulfurization in which H 2 S is absorbed by an alkali solution followed by sulfur separation.

Implementation of Land Auction for Kebonharjo Village: A Comparative Perspective

“…As explained in article 1548 of the Civil Law Code regarding rental agreements, it is explained that "Lease is an agreement by which one party binds himself to provide the other party with the enjoyment of an item, for a certain time with the payment of a certain price (Kitab Undang-Undang Hukum Perdata, n.d.). The agreement itself is an event where someone promises to someone else or where they promise each other to do something (Kumalasari & Ningsih, 2018;Prasetyo, 2017). According to Noer & Muchyidin, an agreement is a form of agreement from two or more parties, who mutually promise to bind themselves to do something.…”