PT Evans, Desa, Kalimantan Timur
Project: PT Evans
The project was for the design, installation, and commissioning of a closed lagoon bioreactor for the treatment of palm oil mill effluent (POME).
The objective of the project was to meet the environmental and operational objectives of the managing company. High levels of COD can be converted into biogas using a process of Anaerobic Digestion (AD). This involves maintaining the effluent produced by the palm oil fabrication process being retained in a covered lagoon for a period of up to 30 days. The process results in the conversion of COD into biogas, with a methane content of around 60%. Rather than being emitted into the atmosphere, the methane is collected and used in spark-ignition engines to provide energy to the mill.
This not only reduces the environmental impact of the process, but also results in an improvement in the operational efficiency of the plant.
Project Specification
The project was designed to treat the palm oil effluent produced from the production of palm oil, one of the staple foods of Asia, and a product used as the basis of many other products around the world.
The mill handles 60 tonnes per hour of fresh fruit bunch generating 600m3 of wastewater a day.
It was designed to handle up to 34,370Nm3/day (1,432Nm3/hour) of biogas, the equivalent of 2.9 MWe.
The lagoon was designed to accommodate 23,300m3 of wastewater from a factory that processes 60 tonnes per hour of Fresh Fruit Bunch.
Project Budget
Total project budget, including permissions, land preparation and power generation equipment of USD $4 million.
Features of CLBR POME
- Proven Principle
- Low construction costs
- No internal baffles
- High conversion efficiency through excellent internal mixing and high retention of anaerobic bacteria
- Enhanced facility for periodic sediment solids removal from the lagoon reactor
- Optional facility for floating scum removal and recycling
- Internal gas storage for black starts
- Enhanced cover design for high safety standards
- Integrated storm water removal system
Advantages of CLBR POME
- Proven technology with many sites constructed in SE Asia over the last 10 years
- Low cost when compared with tank digesters
- Corrosion resistant, low maintenance
- Improvements on cover design with special emphasis on safety
- Compact, integrated design of recycle and influent pumping station
- Long hydraulic and solids retention time achieve excellent treatment efficiency of complex wastewater
- No concerns on biomass retention
- High process stability after shock loading
- Versatile and adaptable to many different conditions
- Use of durable and UV stabilized materials
- Family of designs for specific purposes
