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Chlorine analysis
Marine Pollution Bulletin
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High Temperatures to Reduce Pollution A new process has been developed by the University of Texas (UT) at Austin to use water at high temperatures and pressures to destroy wastes. This hydrothermal process is called supercritical water oxidation (SCWO). It involves subjecting pollutants to water that has been heated to critical temperatures (above 705°F (371°C)), high pressures (more then 3200 lb in -2 (22 064 kPa)), and an oxidant. The process, which operates in a totally enclosed system, has been likened to putting wastes into a pressure cooker. SCWO is remarkable because it can transform toxic waste waters and organic sludges into non-hazardous by-products like water, carbon dioxide and ash, reducing pollutant levels by more than 99%. Most of the SCWO research has taken place at the UT's Balcones Research Center. The largest UT reactor treats 40 gallons (151 1) of waste per hour. A commercial SCWO plant is now being built in Austin that will be able to handle 300 gallons (1136 1) of waste per hour. Backers of the technology point out that it has many potential uses. For example, UT is participating in studies sponsored by the US Department of Defence to design, develop and operate a mobile SCWO unit that could be taken to US military installations that have large stockpiles of hazardous wastes. SCWO may also
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be uindustries. s e d t o t r e a t w a s t e w a t e r sludge generated by
Chlorine Analysis Rosemount Analytical (UK) have developed a reliable free chlorine and pH sensor for monitoring treated water. The analyser, Model 1054, works with 499 TFC sensor and a 399 pH sensor, theequipment monitors two parameters simultaneously, giving indications which permit accurate buffering only once every few weeks instead of every day, with a beneficial effect on operating costs. The unit consistently measures TFC down to 0.2-0.3 ppm. Even when for long periods chlorine levels are too low to detect, the analyser responds quickly to a change; and pH correction has operated successfully at levels up to pH 10.
New Underwater Protective Coating Concord APACS have just launched a new metal and concrete protective coating in the UK that can be applied to wet and oily surfaces--even under water. The new coating allows pipeline repair where it is impossible to dry out or de-commission the pipe-saving time and money. Alocit Aquacoat is physiologically harmless and has been officially approved for use in drinking water conduits and reservoirs.
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High Temperatures to Reduce Pollution A new process has been developed by the University of Texas (UT) at Austin to use water at high temperatures and pressures to destroy wastes. This hydrothermal process is called supercritical water oxidation (SCWO). It involves subjecting pollutants to water that has been heated to critical temperatures (above 705°F (371°C)), high pressures (more then 3200 lb in -2 (22 064 kPa)), and an oxidant. The process, which operates in a totally enclosed system, has been likened to putting wastes into a pressure cooker. SCWO is remarkable because it can transform toxic waste waters and organic sludges into non-hazardous by-products like water, carbon dioxide and ash, reducing pollutant levels by more than 99%. Most of the SCWO research has taken place at the UT's Balcones Research Center. The largest UT reactor treats 40 gallons (151 1) of waste per hour. A commercial SCWO plant is now being built in Austin that will be able to handle 300 gallons (1136 1) of waste per hour. Backers of the technology point out that it has many potential uses. For example, UT is participating in studies sponsored by the US Department of Defence to design, develop and operate a mobile SCWO unit that could be taken to US military installations that have large stockpiles of hazardous wastes. SCWO may also
228
be uindustries. s e d t o t r e a t w a s t e w a t e r sludge generated by
Chlorine Analysis Rosemount Analytical (UK) have developed a reliable free chlorine and pH sensor for monitoring treated water. The analyser, Model 1054, works with 499 TFC sensor and a 399 pH sensor, theequipment monitors two parameters simultaneously, giving indications which permit accurate buffering only once every few weeks instead of every day, with a beneficial effect on operating costs. The unit consistently measures TFC down to 0.2-0.3 ppm. Even when for long periods chlorine levels are too low to detect, the analyser responds quickly to a change; and pH correction has operated successfully at levels up to pH 10.
New Underwater Protective Coating Concord APACS have just launched a new metal and concrete protective coating in the UK that can be applied to wet and oily surfaces--even under water. The new coating allows pipeline repair where it is impossible to dry out or de-commission the pipe-saving time and money. Alocit Aquacoat is physiologically harmless and has been officially approved for use in drinking water conduits and reservoirs.