Archives :: Environmental, Health & Safety :: Environmental Management :: Water Treatment & Supply

Displaying 81 - 100 of 152 stories.
March 28, 2011
GenGuard 8000 offers the capability to use less lower-quality water in the cooling process, while avoiding corrosion and fouling problems. This extension of the existing...
March 23, 2011
Water-supply issues are emerging as a national concern with certain sectors coming under increasing scrutiny. This is certainly the case with the ethanol industry. State discharge regulations dictate that plant designs incorporate technological solutions to minimize water use. These designs give operators increased flexibility in terms of enabling the reuse of water streams internally, with the goal to...
March 1, 2011
A desalination system developed by Watervap LLC (Marble Hill, Ga.; separates saltwater of any concentration into highly purified water and dry solid minerals with high efficiency. The company’s Zero Liquid Discharge (ZLD) process represents a low-cost alternative to brine waste disposal in oil and natural gas production, as well as other industries, such as processed meats and mining...
November 1, 2010
BioAir Solutions Clean the air from wastewater treatment plants without carbon Using its proprietary EcoBase synthetic media, this firm has developed a line of odor control products (photo) that remove both organic and inorganic odorous compounds from the airstreams of industrial wastewater-treatment plant. Units are available for covering airstreams from 100 to 100,000 ft3/min. The EcoBase media provides...
September 28, 2010
Question: How are hydrocarbons best removed from water? Answer:  First, the type of hydrocarbons present must be identified. Typically, the hydrocarbons in question are in the form of oil or an oil-like substance. In that case, the miscibility of oil will have a major influence on the process used. If the oil is immiscible in water and the droplet size is large, the droplets will probably rise rapidly...
September 1, 2010
Athough the municipal water demand is considerably greater than that of industry, many of the municipal needs are addressed by relatively basic technologies, while industrial requirements can only be met with advanced treatment options. And, as industrial water demands continue to grow due to regulatory restrictions and mandates, water treatment providers are developing innovative desalination...
August 1, 2010
Dow Water and Process Solutions (DW&PS; Minneapolis, Minn.;, a business unit of The Dow Chemical Co., unveiled a simplified electrodeionization (EDI) product at the recent Singapore International Water Week event. The new version of the product reduces operating costs for industrial water treatment by up to 15% compared to its predecessor. The Dow Electrodeionization 310...
August 1, 2010
A next-generation, carbon-enhanced membrane-bioreactor (MBR) system improves treatment of industrial wastewater with high organic content and containing compounds that resist microbial breakdown. The system allows economic reuse of wastewater or discharge to meet stringent environmental standards. The new MBR, dubbed EcoRight, will be commercially available in early 2011. First envisioned by Saudi Aramco...
June 10, 2010
Question:  What is driving the trend toward increased water reuse and how is membrane technology addressing this? Furthermore, what does the future hold for water reuse? Answer: Meeting water demands and ensuring a plentiful supply of water for future generations is a top-of-mind issue for the water industry today. Adequate, safe and accessible water supplies are essential to sustaining life and...
June 7, 2010
GE (Fairfield, Conn.; and Ramky Enviro Engineers, an environment and waste management organization, have signed emergency water and industrial-wastewater treatment agreements specifically designed to address India’s industrial-wastewater treatment and recycling needs. Under the agreement, GE’s ultra filtration (UF) and membrane bioreactor (MBR) technology will be...
April 1, 2010
Non-chemical methods for conditioning water for use in cooling towers and boilers have been investigated, marketed and installed for over 100 years. In light of the recent incentives to “go green,” these methods offer engineers, operators and owners the option of replacing corrosive, toxic chemicals with physical or mechanical processes that claim to produce the same or superior results to...
March 23, 2010
Question: Stricter wastewater regulatory environments and water availability continue to drive water reuse and recycle in the chemical and petrochemical industries globally.  What should companies consider when evaluating water reuse as part of the manufacturing and wastewater process? Answer: While reusing wastewater can be an economical alternative to internal or external fresh water supplies, there...
March 1, 2010
The delayed coking process is a fundamental part of the petroleum refining and petrochemical industries, and is among the main technical means for transforming inexpensive heavy oil into more valuable, light-oil products. Delayed coking units are common in petroleum refineries, and the process has been developed significantly as a heavy oil processing method in many countries, including China and the U.S...
January 1, 2010
Typical wastewater-treatment plants (WWTP) — both industrial and municipal — consume large amounts of energy, which can represent 50% or more of the facility’s variable operating and maintenance costs. Most employ biological processes that rely on energy-intensive aeration systems whose energy consumption is approximately 0.5 kWh per m3 of effluent treated. This article discusses a...
November 1, 2009
Last month, a total of 17,722 visitors and 995 exhibitors attended WEFTEC.09, the Water Environment Federation’s (WEF) 82nd annual technical exhibition and conference held in Orlando, Fla. Particularly in this time of economic concerns, the strong showing reinforces the importance of water — its availability, treatment and reuse — in both industrial and municipal sectors. At the show...
September 1, 2009
In more and more locations, the availability of fresh water resources is limited and water reuse is becoming increasingly important. For many industrial applications, the availability of water is essentially a “license to operate”. A large component of the water consumption in many chemical process industries (CPI) is high- and low-pressure boiler water. As such, reusing cooling water blowdown...
August 1, 2009
Cooling water systems that rely on cooling towers are a critical component at chemical process industries (CPI) facilities. However, during operation, these open recirculating systems concentrate the contaminants in the makeup...
July 1, 2009
An energy-autonomous process for capturing air humidity for drinking water has been developed by scientists at the Fraunhofer Institute for Interfacial Engineering and Biotechnology (IGB; Stuttgart; and Logos-Innovationen GmbH (Bodnegg, both Germany; The concept...
February 1, 2009
Globally, water reuse and recycling are not uncommon — with parts of Australia, South Africa and the Middle East rather heartily embracing the practice. Even in Europe, it is estimated that 75 to 80% of water is reused. However, because fresh water is prevalent and plentiful in most parts of the U.S., few domestic chemical processors, or other industrial consumers of water, have yet to take the...
January 1, 2009
For wastewater treatment, membrane bioreactors (MBRs) provide superior effluent quality in a small footprint compared to alternative activated-sludge treatment methods. However, MBRs are prone to fouling, and thus may require frequent membrane cleaning with the associated manpower and chemical costs. Microdyn-Nadir GmbH (Wiesbaden;, in cooperation with Darmstadt University (both...
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