The South Central Regional Water District utility knew that water from these wells contained high levels of dissolved solids, hardness, and sulfates, as well as arsenic content beyond the safety standards established by the Environmental Protection Agency (EPA). A treatment solution was developed ozone pretreatment, ultrafltration (UF) and reverse osmosis (RO) to treat nearby Missouri […]
Muttenz Switzerland to Treat Groundwater with Advanced Oxidation
The groundwater in Muttenz, Switzerland will be purified using a combination of advanced oxidation, adsorption and ultrafiltration. The water is subject to organic trace substances and occasionally impacted by Rhine filtrate. Difficult to treat compounds will be oxidized using ozone and hydrogen peroxide. The ozone and peroxide react to form hydroxyl radicals that are fast […]
Grey Water Reuse – A Low Cost Option for Sustainability
A recent paper published in the AWWA Journal (Olmos & Lodge, 105:2,February 2013, pp 41-42) discusses achieving zero water use and reasonable payback periods for a housing development in Davis California. Net zero water use as defined here is that annula water use equal annual rain fall. This would make the development sustainable from teh […]
Ann Arbor Michigan Uses Ozone for Primary Disinfection
Ann Arbor’s Drinking Water Treatment Plant’s primary source of water comes from the Huron River. Ann Arbor is one of only seven facilities using an inland river as a drinking water source in Michigan. About 85 percent of the water comes from the river, while 15 percent comes from wells located at the city’s airport. […]
Ozone Disinfection of Water Mains
Before a new water main or one that has recently under gone repair can be placed back into service, it must be flushed and disinfected. The conventional approach is to use high concentrations of chlorine for an extended period of time to kill the bacteria living in the biofilms attached to the water main surface. […]
Study Shows Electrolysis and Volatilization Can Mitigate Bromate Formation in Drinking Water
A recent study in the Journal Ozone Science and Enginnering has shown that electrolysis followed by volatilization can remove Br from drinking water and as a result lower the formation of bromate from ozone water treatment. This is an important issue since a large number of water sources contain Br ion. Ozone can react under […]
US EPA Launches App to Let Users Check Waterway Health
The US EPA has launched a new app and website that let’s users check on the health of waterways anywhere in the US. It provides information on thousands of lakes, rivers and streams across the US. The release of the website corresponds to the 40th Anniversity of the Clean Water Act. The app uses GPS […]
Santa Barbara to Complete Upgrade to Ozone
The City of Santa Barbara’s Cater Water Treatment Plant is being upgraded in response to stricter federal drinking water regulations. The $20 million ozone water treatment project is about 80 percent complete. The work should be completed by the end of January. Ozone will replace chlorine in the pre-treatment of water at the plant. Besides […]
Dallas Experienced Problems with Ozone System
Dallas Water Utilities experienced an outage at the Elm Fork Drinking Water Treatment Plant on December 10. As a result, the facility failed to meet the minimum treatment technique requirements that day when its water system failed to properly disinfect the drinking water for a period of more than four hours. DWU has indicated that […]
Dangers of Bromate in Drinking Water May Be Overstated
Ozone can react with bromide ion to form bromate. Currently, the USEPA has a limit of 10 micro grams per liter for ozone in drinking water. This level has been extended to other water treatment applications, for example, ground water remediation. The USEPA is considering lowering the allowable limit for bromate to 5 micro grams […]