The City of Windsor in Ontario, Canada, owns and operates two wastewater treatment plants.
A renowned pharmaceutical company in Pune, India, installed a water treatment system to recycle pharmaceutical process wastewater for reuse. Ultrafiltration was chosen as pretreatment to a reverse osmosis system, and the feed water was tertiary treated pharma effluent. Soon after operation began, the existing UF membranes were repeatedly choking, and QUA offered Q-SEP ultrafiltration modules to the customer to replace the existing UF membranes.
A natural gas-fired combined cycle power generation facility located in Idaho contacted QUA to find a solution to improve the performance of a water treatment system used to recycle the plant’s cooling tower blow down water.
The Gainesville Renewable Energy Center is a nominal 100 MW wood-fired biomass power generation facility located in Gainesville, FL. The plant provides about 30% of Gainesville Regional Utilities’ power, reducing the area’s dependence on energy from fossil fuels and greenhouse gas emissions. The client contacted QUA to install their Q-SEP® UF membranes as pretreatment for the plant’s water treatment system.
Sabine Pass, a large LNG refinery in the U.S., required a membrane desalination solution to cater to its extensive process water needs in order to produce a large amount of liquefied natural gas for export.
During operation, a remote mine site in Nevada experienced a pit flood as a direct result of groundwater recharge where approximately 40 million gallons of water flooded the open pit and brought mine operations to a halt.
An automotive parts manufacturing plant was using a polymeric membrane to remove oil from water it used to rinse parts. The rinse water contained between 6% and 7% oil and the customer wanted to remove >95% of the oil from the water so the water could be reused in the plant.
Produced water (PW) is salty water trapped in the reservoir rock and brought up along with oil or gas during production. It subsists under high pressures and temperatures, and usually contains hydrocarbons and metals. Therefore, it must be treated before being discharged to surface water. Different techniques are being used to treat PW through phase separations, system control and design, and chemical treatments. In this paper, we discuss our experimental results on treating PW through electrocoagulation (EC).
An international mining company was looking at electrocoagulation for waste treatment at a copper mine in South America. A sample from ore processing was provided for bench-scale testing.
XXXX Plating Company operates a decorative plating shop in Los Angeles, Ca., doing finishes in nickel, copper, and chromium.
A milk producer operates an evaporated milk production facility that generates an average of 58,000 gpd of contaminated water with spikes of 1,200 gallons up to 12 times per day. Two 2,000 gallon batch tanks are used for pH adjustment before discharge. Most of the flow goes through the tanks.
A major U.S. waste management company provided a sample of wastewater generated by an underwater ship cleaning operation. The sample was to be tested in the KASELCO laboratory for removal of copper and zinc and for improvement of clarity (suspended solids removal). Customer is interested in treating 50GPM.
Wastewater filtration is often part of the tertiary treatment process that involves the final removal of suspended particles from water that has passed through both the primary and secondary treatment phases and immediately precedes disinfection. As the water passes through the filter, residual suspended material and bacteria is trapped in the filter and are removed from the filtered water. Passage can be blocked by physical obstruction, biological action, adsorption, absorption or a combination of ways. Wastewater filtration is usually the final step in the solids removal process.
With regulations increasing around wastewater effluent, the use of ultrafiltration and microfiltration systems in further polishing effluent has grown. Sand or activated carbon filters can provide a media for bacterial decomposition of nutrients, converting nitrates into nitrogen gas. The rise of water reuse applications is also fueling the increasing use of filters during the final polishing stages of the wastewater treatment process.