H2S Bioscrubber System for Biogas Plant

PT KLK

PT Putra Bongan Jaya

East Kalimantan

Work in progress

Organics Bali is carrying the delivery and installation of an H2S bio-scrubber system at the PT. Putra Bongan Jaya (PBJ Mill) in East Kalimantan. This project is part of a larger initiative to provide biological H2S removal solutions for KLK sites in the region.

The project involves the implementation of a high-efficiency biological scrubber designed to remove hydrogen sulphide from biogas produced during anaerobic digestion. This process is essential for meeting environmental standards and preventing corrosion in downstream equipment like gas engines or boilers.

• Maximum Biogas Flow: 1,000 Nm3/H.
• Inlet H2S Concentration: 3,500 ppm mass.
• Target Outlet H2S Concentration: ≤ 100 ppm mass.
• Scrubber Vessels: 2 units (one duty and one standby).
• Vessel Dimensions: 3.5 m diameter by 11.5 m height.
• Vessel Material: Reinforced Fibre Glass (FRP)
• Carbon Credit Viability: The equipment is listed as a critical component in numerous CDM-registered projects (Clean Development Mechanism) globally, supporting its eligibility for carbon finance.

• Purifies biogas for renewable energy use by removing corrosive Hydrogen Sulphide (H2S) using biological oxidation

• Removes up to 1.1 tonnes of H2S per day, significantly improving gas quality for industrial applications

• Treats up to 24,000 Nm3 of biogas per day, ensuring environmental compliance for the mill’s methane capture system

• Reduces H2S concentrations from 3,500 ppm to less than 100 ppm, protecting high-value downstream equipment

• Supports mill operations with clean fuel for gas engines or boilers, promoting circular economy practices

• Minimizes environmental footprint by using a chemical-free process and recycling lagoon effluent as a nutrient source

• Ensures continuous uptime through a dual-vessel duty and standby configuration and automated self-cleaning technology

*Note (assumptions):

• H2S removal capacity based on design flow of 1,000 Nm3/hr and inlet concentration of 3,500 ppm mass.

• Chemical reduction assumes biological process replaces traditional NaOH wet scrubbing or dry-bed media.

• System redundancy based on the inclusion of two GRP reactor vessels (one duty, one standby).

• Cleaning efficiency derived from the RIC (In-situ Rapid Cleaning) automated flood washing specification.

• Nutrient sourcing assumes the use of existing POME/lagoon effluent to sustain the biological bacteria.

• Equipment longevity based on the prevention of sulphuric acid formation in downstream piping and engines.

• Compliance potential meets international standards for CDM and voluntary carbon market monitoring and verification.