Contact us

Nongyai Wastewater Treatment

Capturing and recycling harmful emissions for a sustainable power system


Methane is a harmful greenhouse gas more powerful than carbon dioxide and is emitted as biogas from Thailand's factories when wastewater is stored in open lagoons. Under a typical system, wastewater from factories is treated in 8 cascading open anaerobic lagoons, allowing harmful greenhouse gases to enter the atmosphere.

Wastewater treatment

Sustainable Development Goals

6. Clean Water and Sanitation

4,360 m3 of wastewater treated

on average each day

8. Decent work and economic growth

5 jobs

are created during the construction and operation phases of the biogas reactor system and of the cover lagoons

13. Climate Action

36,973 tonnes of CO2e reduced

on average annually by providing an alternative energy source to the burning of fossil fuels

The Solution

Using an innovative recycling system, fugitive biogas from a starch factory, a sweetener plant and an ethanol plant is captured and repurposed to contribute to the powering of the factories. The biogas generated is utilised as fuel in a hot oil boiler and steam boilers to produce electricity and heat. Prior to project implementation, a fuel mix based on biomass and coal was used.


The Impact

Not only does this project contribute to a reduction of anthropogenic greenhouse gas emissions, but it also delivers a number of benefits in the form of sustainable development. New jobs and income opportunities have been provided to the region by contracting local firms for the construction, operation and maintenance of the plant. Furthermore, by capturing biogas, the odour and nuisance normally associated with open lagoon wastewater systems is avoided. The utilisation of biogas for energy generation can be regarded as a means to reduce dependency on imported energy products, which in turn improves the energy security status of Thailand.

Project ID: 300493
Available Languages