As regulatory issues, environmental sensitivity, and longterm water supply concerns increase, the chemical process industries (CPI) are considering ways to reduce their water discharges. In fact, more and more companies are evaluating the viability of zero-liquid-discharge (ZLD) processes. This usually…
The need to conserve water is becoming a common concern throughout the world. Whether this is due to the cost of water, availability of water, or environmental concerns, water conservation is becoming a major focal point, both in the public…
Monitoring Our Atmosphere Please refer to the Editor’s Page, April 2008: Mr. Gerald Ondrey’s last sentence sums it up. "Ultimately, the only truly green solution is to reduce consumption — the second law of thermodynamics says so." Rep. Roscoe Bartlett…
At last month’s IFAT Trade Exhibition (May 5 – 9; Munich, Germany), Kemira Water (Helsingborg, Finland; edlinks.chemengonline.com/7373-542) introduced, H2S-Guard, a system that monitors, controls and protects against odor and corrosion in sewage networks. The system consists of H2S measurement devices…
FIGURE 1. In a typical system for wastewater treatment, the liquid feed is introduced at the top of the column and steam is introduced at the bottom In recent years, steam strippers have become integral parts of industrial plant…
The Jiashan Yao-chuang wastewater treatment plant in China’s Zhejiang Province has successfully pilot-tested a three-stage, biologically active reactor system that reduces effluent levels to within the nation’s Class 1A standards. (The standards require < 10 mg/L for biological oxygen demand…
A new nanomaterial which doubles as a filter and a reactor capable of destroying unwanted substances, has been developed by a team from Nanyang Technological University (NTU; Singapore; edlinks.chemengonline.com/7371-544), and the Singapore Public Utilities Board. The material consists of nanosized…
Hydrocarbon leaks can disrupt recirculated cooling-water systems. Here’s an outline of effects and remedies Water is often the fluid of choice for cooling systems in the chemical process industries (CPI). Recirculated cooling-water systems are used to control the temperature of…
Careful control of water and steam chemistry at CPI facilities can pay off handsomely in reliable operation Sometimes lost in the hustle and bustle of production issues at chemical-process-industries (CPI) facilities is that high-purity water, and steam produced thereby, is…