The Company You Can Trust for Delivering Long Tern Sustainable Solutions
for Water and Wastewater Treatment Processes


About GEM

GEM provides clients with specific solutions for specialized water and wastewater treatment process applications. GEM's services range form project design, build and operate for new installations to the management operation and maintenance of client's facilities

GEM can also renovate and upgrade existing water and wastewater installations to optimize overall plant performance and to meet environmental standards.

Since it foundation in 2003,
GEM adopts a proactive approach to corporate social responsibility and in providing initatives towards achieving sustainable environmental development.

GEM is certified for Integrated Management System ISO 9001
ISO 14001 and TIS/OHASA 18001 at its operational sites

For Business Development GEM can deliver water and wastewater management solutions for clients across municipal , industrial and commercial markets.


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A Selection of Projects


Ladkrabang Water Treatment Project

  • Design Build Own Operate of a Water Treatment Plant

  • Completed and Started in 2013 - Capacity 14,000 cum/day

  • Treatment Process - Clarification and Dual Media Filtration

  • Contract Duration 15 Years


Laemchabang Recycling Plant

  • Design Build Own Operate a Water Recycling Plant

  • Completed and Started in 2006 - Capacity of 5,000 cum/day

  • Treatment Process - Reverse Osmosis

  • Contract Duration is for 20 years


Maptaphut I8 Water Treatment Project

  • Build Own Operation of a 20,000 cum/day Water Treatment Plant (Raw water)

  • Treatment Process - Clarification

  • Contract Duration 15 years

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Chatuchak Wastewater Treatment Plant

  • The Management and Maintenance by GEM, (as a partner
    in a Joint Venture) of the Chatuchak Water Quailty Control Plant

  • Capacity 150,000 cum/day with 37.5 km of sewage collection

  • Treatment Process - Cyclic Activated Sludge System (CASS)

  • Contract Duration is for 5 years


Asia Industrial Estate Wastewater Treatment Plant

  • Management and Operation of a 8,000 cum/day Central Wastewater Treatment Plant in Asia Industrial Estate

  • Treatment Process - Aerated Lagon

  • Contract Duration is for 5 years


Amata City Chonburi Cemtral Wastewater Treatment Plan No 4

  • Build Operation Transfer of a 10,000 cum/day Central Wastewater Treatment Plant No 4 in Amata City Chonburi Industrial Estate

  • Treatment Process - Sequencing Batch Reactor (SBR)

  • Contract Duration 25 years


Wastewater Treatment Plant 
Suvarnabhumi Airport, Samutprakarn

The water supply system, wastewater collection and treatment, recycle water system, sewage disposal system and flood control drainage systems of Suvarnabhumi International Airport (AOT)