1 MW MSW biogas Power Plant by Bankai-Papop JV in Rayong, Thailand

Summary

This video introduces the first full-scale biogas power plant using organic municipal solid waste in Rayong, Thailand. The facility processes 225 tons of waste per day, using a multi-step process that includes cleaning, shredding, and anaerobic digestion to produce biogas. The biogas is then used to generate electricity, with the plant producing 7.13 million kWh per year. The project helps reduce greenhouse gases, with a significant environmental benefit of 46,000 tons of CO2 equivalent reduction annually. This project presents a sustainable waste management solution and energy generation model.

Takeaways

• 😀 The biogas power plant is the largest of its kind, using organic waste from municipal solid waste (MSW) in Rayong province, constructed by Ban Kai Purpub Joint Ranger.
• 😀 The plant processes 225 tons of waste per day and is designed to receive feedstock from nearby MSW sorting plants.
• 😀 The first process in the plant is the cleaning and shredding of waste, which includes removing metals and larger particles to prevent clogging in the system.
• 😀 A magnetic separator is used to extract non-biodegradable metals from the waste stream to ensure smooth operation of the subsequent processes.
• 😀 After the waste is shredded and screened, impurities are further removed through a vibrating screen and sand removal tank to prepare the slurry for digestion.
• 😀 The anaerobic digestion process consists of an acid tank and two digester tanks where bacteria convert large organic molecules into smaller molecules suitable for digestion.
• 😀 The digester tanks are designed as continuous stirred-tank reactors (CSTR) to handle high-solid content waste like organic MSW.
• 😀 The plant is designed to produce 15,000 normal cubic meters of biogas per day, which is then processed to remove hydrogen sulfides and moisture before being used in power generation.
• 😀 The biogas produced is composed of approximately 65% methane, 32.5% carbon dioxide, and negligible hydrogen sulfide, making it ready for use in electricity generation.
• 😀 The biogas generator set produces around 1,000 kilowatts per hour, generating approximately 7.13 million kilowatt-hours of electricity annually, with some biogas used for compost drying at a nearby factory.
• 😀 The entire plant is monitored and controlled via a PLC and SCADA system, allowing for easy operation and historical data tracking, customized for the project's specific needs.

Q & A

What is the primary function of the biogas power plant described in the video?

The primary function of the biogas power plant is to convert organic waste, specifically the organic fraction of municipal solid waste, into biogas, which is then used to generate electricity.

Where is the biogas power plant located?

The biogas power plant is located in the Integrated MSW Management Center in Rayong Province.

What is the capacity of the biogas power plant?

The plant has a capacity of 225 tons per day.

How does the cleaning and shredding process work in the plant?

The cleaning and shredding process begins with a view loader that takes in the feedstock. The waste is then cleaned and shredded to remove metals using a magnetic separator and other screening steps before moving on to the anaerobic digestion process.

What role does the magnetic separator play in the plant?

The magnetic separator removes metals from the waste stream, as metals are non-biodegradable and could cause clogs in the pipes and downstream processes.

What happens to waste that is larger than 25 millimeters in size?

Waste larger than 25 millimeters is sent to the waste bunker for disposal in the landfill.

How is biogas produced in the plant?

Biogas is produced through an anaerobic digestion process, which includes an acid tank and two anaerobic digester tanks where bacteria convert organic matter into biogas, mainly methane and carbon dioxide.

What is the role of the biogas dryer in the process?

The biogas dryer removes moisture from the biogas to ensure its quality before it is used for electricity generation.

What is the capacity of the biogas genset?

The biogas generator set (genset) has a capacity of around 1,000 kilowatts per hour and can produce approximately 7.13 million kilowatt-hours per year.

What are the environmental benefits of the biogas power plant?

The biogas power plant reduces greenhouse gases, particularly methane, capturing up to 46,000 tons of CO2 equivalent per year. It also provides a sustainable method for waste disposal and electricity generation.