Original article published in Caixin’s Century Weekly by Gong Jing and Liu Hongqiao. Reprinted at Chinadialogue.net. Authors won the “Journalist of the Year” and “Young Journalist of the Year” categories at chinadialogue and The Guardian’s China Environmental Press Awards. A month after their article was published, the housing ministry was forced to release previously unpublished […]
Month: July 2013
Ozone for the Long Term Surface Water Treatment Rule (LT2ESWTR)
Public drinking water systems will need to start complying with LT2ESWTR if sampling results indicate source waters are at risk for cryptosporidium contamination. The protozoan is capable of causing serious gastrointestinal illness. Compliance generally means additional protective measures including watershed control, source relocation, pretreatment methods, filtration, and pathogen inactivation methods. Chlorination does not control the […]
Laughlin, NV Treats Drinking Water with Ozone to Reduce Disinfection By products and Control Taste and Odor Issues
Big Bend Water District (BBWD) is the supplier of potable water to the community of Laughlin, the sole source of which is the Colorado River. “The BBWD has over 15,000 acre feet per year as an allotment, but historically Laughlin rarely uses more than 5,000 acre feet of that allotment. BBWD can treat a maximum […]
New PCB Etching Process Rreplaces Hydrogen Peroxide with Ozone
A new printed circuit board (PCB) etching process uses with ozone to replace hydrogen peroxide used in the etching solution. The invention is said to be environmentally more friendly while also producing traces just 20µm in width. H2O2 processes are seen as having broad process windows, making etching harder to control. The new process from […]