ADA-ES,Inc was spun off from Earth Sciences in 2003, makes environmental technology systems and specialty chemicals that reduce emissions at coal-burning power plants. It offers integrated mercury control systems, as well as flue gas conditioning and combustion aid chemicals. ADA-ES provides consulting and testing services and mercury measurement equipment. ADA-ES also participates in a joint venture with NexGen Refined Coal to market proprietary coal technology that reduces emissions of nitrogen oxides and mercury from some treated coals.

Bion Environmental Technologies provides waste stream remediation for animal operations, primarily for large dairy and hog farms. To reduce pollution caused by animal waste, Bion Environmental uses organic nutrients, bacteria, and other microbes to treat the waste before disposal. The treatment creates organic soil and fertilizer products, which the company markets for use on athletic fields, gardens, and golf courses. The company is working closely with government bodies and universities in Pennsylvania to address the major problem of animal waste run-off from farms into the Chesapeake Bay.

Calgon Carbon makes activated carbons and purification systems and offers purification, separation, and concentration services to the industrial process and environmental markets. The company provides activated, impregnated, and acid-washed carbons (about 130 million pounds annually) for use in applications such as food processing, wastewater treatment, and emissions control. Calgon Carbon also sells equipment that uses activated carbon and ion exchange resins for the purification of products in the chemical, food, and pharmaceutical industries. The company's consumer products include charcoal and carbon cloth.

CECO Environmental is a world leader in clean air solutions for industries of all sizes in all sectors. For more than three decades, we have been providing innovative, custom engineered solutions for improving air quality in a wide range of industrial processes and applications. We are a full service air pollution control company, providing our services to industry through our twelve subsidiaries.

Concord Fabrics textile manufacturer mainly produces polyester circular knits and fleece that appeal to patchwork and quilting enthusiasts. The company's Andover Fabrics unit specializes in fabrics used in quilts, made in a variety of colors and patterns. Its Makower UK unit, headquartered in Oxfordshire, designs and produces cotton fabrics for quilters. Andover Fabrics sells to apparel makers and retailers in the US, Canada, and South America. Makower prints its products in South Korea and distributes them throughout Europe from its warehouse in Oxfordshire. Concord Fabrics is owned by Safer Textiles.

Donaldson Company makes filtration systems designed to remove contaminants from air and liquids. Donaldson's engine products business makes air intake and exhaust systems, liquid-filtration systems, and replacement parts; products are sold to manufacturers of construction, mining, and transportation equipment, as well as parts distributors and fleet operators. The company's industrial products include dust, fume, and mist collectors and air filtration systems used in industrial gas turbines, computer disk drives, and manufacturers' clean rooms. Donaldson has more than 100 locations worldwide, including 40 manufacturing plants.

Duoyuan Global Water Inc. company manufactures water and wastewater treatment equipment for use in industrial and municipal water systems. Its makes more than 80 different products, including water conditioners, filters, various water purification systems (i.e. ultraviolet, ozone, electrodeionization), grit separators, and others. The company distributes its products throughout China and serves municipalities, as well as power generation, oil, steel manufacturing, and other companies. Duoyuan Global Water was founded in 1992; it filed an initial public offering (IPO) in 2009.

Duoyuan Global Water Inc. company manufactures water and wastewater treatment equipment for use in industrial and municipal water systems. Its makes more than 80 different products, including water conditioners, filters, various water purification systems (i.e. ultraviolet, ozone, electrodeionization), grit separators, and others. The company distributes its products throughout China and serves municipalities, as well as power generation, oil, steel manufacturing, and other companies. Duoyuan Global Water was founded in 1992; it filed an initial public offering (IPO) in 2009.

Energy Recovery designs, develops, and manufactures energy recovery devices used in sea water reverse osmosis (SWRO) desalination plants. The SWRO process is energy intensive, using high pressure to drive salt water through membranes to produce fresh water. The company's main product, the PX Pressure Exchanger, helps recapture and recycle up to 98% of the energy available in the high-pressure reject stream, a by-product of the SWRO process. The PX can reduce the energy consumption of a desalination plant by up to 60% compared with a plant lacking an energy recovery device. Subsidiary Pump Engineering also makes high pressure pumps.

Euro Tech Holdings distributes laboratory instruments, analyzers, test kits, and other equipment for water and wastewater treatment throughout Hong Kong and China. Offering equipment from both Asian and Western suppliers, Euro Tech also distributes telecommunications and general testing equipment, and provides technology services to government agencies, utilities, and beverage makers. The company has more than 1,000 customers, including the Hong Kong Environmental Protection Department and China Light & Power. Nearly all of the company's business is in China.

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