Top 10 Wastewater treatment plant Suppliers, Manufacturers, Wholesalers and Traders in Thailand

Founded in 2005, Siam WaterTech has grown from a small local supplier to a national leader in wastewater treatment solutions, with headquarters in Bangkok and regional offices in Chonburi and Rayong. What sets them apart is their deep understanding of Thailand's industrial ecosystem—they've worked with over 500 clients, from automotive parts manufacturers to lithium battery recycling plants, tailoring systems that address the unique contaminants of each sector.

Their product portfolio includes state-of-the-art effluent treatment machine equipment designed to remove heavy metals, oils, and chemicals from industrial wastewater, ensuring compliance with Thailand's Pollution Control Department (PCD) standards. For recycling facilities, their water process equipment integrates seamlessly with battery breaking and separation systems, treating wastewater from lead-acid and lithium-ion battery recycling lines. One of their flagship offerings is a modular wet process equipment line, which uses gravity separation and chemical precipitation to handle high-volume wastewater streams (up to 5,000 m³/day) with minimal energy use.

Clients often praise Siam WaterTech for their after-sales support—they provide on-site training for operators and 24/7 technical assistance, ensuring systems run smoothly even in the most demanding environments. "We don't just deliver equipment; we build partnerships," says Managing Director Apiwat Wongsuwan. "Our goal is to make wastewater treatment a competitive advantage for Thai businesses, not a burden."

Established in 2010, Bangkok Eco Solutions (BES) has carved a niche in serving small to medium-sized enterprises (SMEs) that need cost-effective yet reliable wastewater solutions. Based in the heart of Bangkok's industrial district, BES understands the challenges SMEs face—limited space, tight budgets, and evolving regulatory demands. Their response? Compact, scalable systems that grow with your business.

BES's core products include modular effluent treatment machine equipment that can be installed in as little as 20 square meters, making it ideal for urban factories. Their water process equipment for textile dyeing facilities, for example, uses a combination of biological treatment and membrane filtration to reduce color and COD levels by over 90%, all while operating on a fraction of the energy consumed by traditional systems. For recycling plants, their wet process equipment is designed to handle the acidic wastewater from circuit board recycling, neutralizing pH levels and removing heavy metals like copper and lead.

What makes BES stand out is their focus on affordability without compromising quality. They offer flexible financing options and lease-to-own programs, making advanced wastewater treatment accessible to startups and family-owned businesses. "Many SMEs think wastewater treatment is out of their reach, but we're proving it's not," says Sales Director Natcha Chaiyaporn. "Our systems pay for themselves in reduced fines and lower water reuse costs within 2–3 years."

With roots dating back to 2008, Thai Green Engineering (TGE) has built a reputation for tackling Thailand's toughest wastewater challenges, particularly in heavy industry and mining. Headquartered in Khon Kaen, they specialize in designing wet process equipment for high-contaminant wastewater, such as that from metal smelting, ore extraction, and chemical manufacturing. Their systems are known for durability—many clients report using TGE equipment for over 15 years with minimal maintenance.

TGE's flagship product is a high-capacity effluent treatment plant that combines chemical coagulation, sedimentation, and activated carbon filtration. For mining operations, their water process equipment includes specialized tailings water treatment systems that recover reusable water and reduce sludge volume by up to 60%. They also offer turnkey solutions for air pollution control, making them a one-stop shop for industrial facilities looking to address both water and air quality.

"Heavy industry requires robust solutions," explains Chief Engineer Somchai Pongsiri. "Our wet process equipment is built to withstand abrasive materials and extreme pH levels, ensuring consistent performance even in harsh conditions." With projects across Southeast Asia, including a recent contract with a large nickel mining company in Laos, TGE is expanding its footprint beyond Thailand while staying rooted in local expertise.

Chonburi Water Systems (CWS) was founded in 2012 to meet the growing demand for specialized wastewater treatment in Thailand's Eastern Economic Corridor (EEC), a hub for electronics manufacturing and recycling. Located in Laem Chabang, they've become a go-to supplier for circuit board recycling plants, lithium battery facilities, and electronic waste (e-waste) processors, all of which generate wastewater with unique contaminants like heavy metals, fluorides, and organic solvents.

CWS's water process equipment for e-waste recycling includes a closed-loop system that treats and reuses up to 90% of wastewater, significantly reducing water intake costs. Their effluent treatment machine equipment uses ion exchange resins to target specific metals like gold, silver, and copper, allowing recycling plants to recover valuable materials while meeting discharge standards. For lithium battery recycling lines, they offer specialized wet process equipment that neutralizes acidic wastewater and removes lithium ions, preventing environmental contamination.

"Electronics recycling is a fast-growing industry in Thailand, but it comes with complex wastewater challenges," says CWS CEO Supaporn Thongdee. "Our systems are designed to adapt—whether you're processing 500 kg/day of circuit boards or 2,000 kg/day of lithium batteries, we can scale to your needs." With certifications from the International Organization for Standardization (ISO) and partnerships with global e-waste technology firms, CWS is at the forefront of sustainable electronics recycling in Southeast Asia.

Phuket Industrial Solutions (PIS) may be based on Thailand's tourist island, but their focus is firmly on industrial excellence. Established in 2003, they've built a loyal client base across southern Thailand, serving industries from rubber processing to seafood canning. What makes PIS unique is their expertise in remote and island-based facilities, where logistics and space are often limited.

Their product line includes mobile effluent treatment machine equipment that can be transported to off-grid locations, as well as compact wet process equipment designed for small to medium-sized plants (100–3,000 m³/day). For coastal factories, their saltwater-resistant systems are a game-changer, reducing corrosion and extending equipment lifespan in humid, salty environments. PIS also offers customized water process equipment for the tourism sector, treating wastewater from resorts and hotels to a standard that allows reuse for landscaping and irrigation.

"Island industries face unique hurdles—high shipping costs, limited technical expertise locally, and strict environmental regulations to protect our beaches and coral reefs," explains PIS Founder Viroj Srisuwan. "We solve these by providing turnkey systems that are easy to operate and maintain, with spare parts stocked locally. Our goal is to make wastewater treatment invisible—something that just works, so businesses can focus on what they do best."

Rayong Wastewater Technologies (RWT) entered the market in 2015 with a bold mission: to make zero-discharge wastewater treatment accessible to Thai industries. Based in the industrial city of Rayong, they've since partnered with automotive manufacturers, chemical plants, and plastic recycling facilities, helping them eliminate wastewater discharge entirely through advanced recycling and reuse systems.

RWT's water process equipment for zero-discharge plants combines ultrafiltration, reverse osmosis, and evaporation technologies to treat wastewater to a purity level suitable for industrial reuse—whether as cooling tower makeup water, boiler feed, or process water. Their effluent treatment machine equipment also includes sludge drying systems that convert waste solids into fuel pellets, turning a liability into a resource. For plastic recycling facilities, their wet process equipment removes additives and dyes from wastewater, allowing recycled plastic to meet food-grade standards.

"Zero discharge isn't just about compliance—it's about resource efficiency," says RWT Technical Director Kritsanapong Jirakarn. "Our clients report saving 30–40% on water costs within the first year, and many qualify for government incentives for sustainable practices." With a recent project for a major automotive parts manufacturer in Chachoengsao, RWT demonstrated that zero-discharge systems can scale to even the largest industrial operations, processing over 8,000 m³/day of wastewater with 99% reuse rates.

Samut Prakan Eco Engineering (SPEE) has been a trusted name in Thailand's food and beverage industry since 2007. Located just south of Bangkok, they specialize in wastewater treatment for breweries, distilleries, seafood processing plants, and fruit canneries—industries that generate high-strength organic wastewater with high biochemical oxygen demand (BOD) and suspended solids.

SPEE's effluent treatment machine equipment for food processing uses anaerobic digestion to break down organic matter, producing biogas that can be used for heating or electricity generation. Their water process equipment also includes dissolved air flotation (DAF) systems to remove fats, oils, and greases (FOG), a common challenge in food wastewater. For breweries, their wet process equipment integrates with brewing cycles, treating wastewater during production lulls to avoid peak load issues.

"Food and beverage wastewater is tricky—it's highly variable, with BOD levels spiking during production runs," says SPEE Sales Manager Nuanchan Wongwiwat. "Our systems are designed to handle these fluctuations, ensuring consistent performance 24/7." With clients like Singha Brewery and ThaiｕｎｉｏｎGroup, SPEE has proven their ability to deliver reliable, cost-effective solutions that meet both PCD standards and international certifications like the Global Food Safety Initiative (GFSI).

Founded in 2013, Nakhon Pathom Water Innovations (NPWI) has emerged as a leader in pharmaceutical and healthcare wastewater treatment, a sector where precision and compliance are non-negotiable. Based in Nakhon Pathom, they serve hospitals, pharmaceutical factories, and medical device manufacturers, all of which require wastewater treatment systems that remove pathogens, pharmaceuticals, and toxic chemicals to the highest standards.

NPWI's water process equipment includes membrane bioreactors (MBRs) that combine biological treatment with ultrafiltration, producing effluent so clean it can be reused for non-potable purposes like facility cleaning. Their effluent treatment machine equipment also features advanced oxidation processes (AOPs) to break down persistent organic pollutants (POPs) found in pharmaceutical wastewater. For hospitals, their wet process equipment includes disinfection systems that use ultraviolet (UV) light or chlorine dioxide to eliminate bacteria and viruses, ensuring safe discharge into municipal sewers.

"In healthcare, there's no room for error," says NPWI Director Dr. Siriporn Chaiyasut. "Our systems are validated to meet the World Health Organization (WHO) guidelines, and we work closely with clients to stay ahead of evolving regulations." With a recent contract to supply wastewater treatment equipment for a new vaccine production facility in Pathum Thani, NPWI is expanding its reach into the biotech sector, further solidifying its reputation for precision and reliability.

Udon Thani Industrial Services (UTIS) has been a pillar of Thailand's northeastern industrial sector since 2001. Based in Udon Thani, they specialize in wastewater treatment for textile and dyeing facilities, which are abundant in the region. Textile wastewater is notoriously challenging, with high color, salt, and chemical content, but UTIS has perfected systems that transform this wastewater into a manageable resource.

UTIS's wet process equipment for textiles includes sequential batch reactors (SBRs) for biological treatment and adsorption columns using activated carbon or agricultural waste (like rice husks) to remove color. Their effluent treatment machine equipment also features sludge dewatering presses that reduce sludge volume by 70%, making disposal more cost-effective. For dyeing plants, their water process equipment recovers salt from wastewater, allowing reuse in dye baths and reducing raw material costs.

"Textile manufacturers face intense competition, so cost efficiency is key," says UTIS General Manager Thanakorn Srivastava. "Our systems not only meet PCD standards but also cut water and chemical costs by up to 25%." With over 200 textile clients across Isaan, including major brands like Thai Silk Co., UTIS has deep local knowledge and a network of service technicians to provide rapid support, ensuring minimal downtime for their clients.

The youngest supplier on our list, Chiang Mai Green Tech (CMGT) was founded in 2016 with a focus on eco-friendly, renewable energy-integrated wastewater treatment. Based in Chiang Mai, they serve northern Thailand's agricultural processing plants, small factories, and eco-resorts, offering systems that combine wastewater treatment with solar power, reducing both carbon footprints and energy costs.

CMGT's water process equipment includes solar-powered aeration systems for biological treatment, which use solar panels to run blowers and pumps, lowering electricity bills by 40–60%. Their effluent treatment machine equipment for small-scale facilities is modular and easy to install, making it ideal for remote areas with limited technical expertise. For eco-resorts, their wet process equipment treats wastewater to a standard suitable for irrigation, allowing resorts to maintain lush landscapes without depleting local water sources.

"Sustainability shouldn't be complicated or expensive," says CMGT Founder Lertsak Wongwanich. "We design systems that work with nature, not against it." One of their most innovative projects is a solar-powered wastewater treatment plant for a coffee processing cooperative in Mae Hong Son, which treats 200 m³/day of coffee pulp wastewater and uses the treated water to irrigate shade trees, creating a closed-loop agricultural system.