Protecting wastewater treatment facilities requires operators to think strategically about their unique challenges and identify the best solution for their specific requirements. Specifying the appropriate headworks system for the plant’s needs is arguably one of the most important design decisions a public works engineer will make.
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.
Chemical, petrochemical, and oil-reﬁning plants are process-intensive operations with regulatory requirements to protect the surrounding water and air from the effects of industrial pollution. These external demands are matched by equally compelling internal pressures to address product puriﬁcation needs, ﬁnd alternatives to utilizing costly fresh water in production processes, reduce the carbon footprint, and operate efficiently and proﬁtably.
The 1.5 MGD West Carrollton Wastewater Treatment Plant in West Carrollton, OH came on-line in 1989 and today serves 12,000 area residents. The activated sludge facility produces an average of 200 wet tons/month of sludge that, following belt filter press dewatering, is spread on area farmland by a biosolids management company.
The Jimo, China, municipal wastewater plant was originally designed to treat a combination of municipal and textile wastewater (120,000 m3/d) with Class IB effluent limits for BOD, COD, ESS, TN, NH3-N and TP.
AdEdge Water Technologies was recently engaged by Pharmaceutical Services & Installations (PSI) to provide a treatment option for the Century Packaging Corporation in Las Piedras, Puerto Rico.
Greer Commission of Public Works (CPW) has been providing water, wastewater and electric services to the City since 1914 with natural gas service added in 1957.
A plant’s headworks plays a crucial role in the pretreatment influent for any wastewater treatment facility. They protect the operation of downstream equipment and enhance the efficiency of the overall wastewater treatment process.
The City of Windsor in Ontario, Canada, owns and operates two wastewater treatment plants.
The process of aeration is used to mix, circulate, or dissolve air into a liquid or another substance. Mechanical aeration can reduce the amount of chemicals needed to treat a body of water by providing the oxygen that bacteria need to function properly. There are two common types of water aeration: subsurface and surface. Although subsurface aeration comes to mind first in discussions of wastewater treatment, surface aeration plays an equally important role in oxygenating liquids.
City of Tooele needed to reduce sludge volume that would produce reusable material, be simple to maintain, and provide cost effective operation. The Huber Technology SRT Solar Dryer was determined to be a technology fit to achieve Tooele’s goals. The linear feed design of the SRT Solar Dryer provided the ability to feed dewatered sludge to the dryer as it was produced. Read the full case study to learn more about their installation.
The clarity of water in a stream, river or ocean is a key determinant in fostering a healthy and balanced aquatic ecosystem. The clearer the water, the greater the ability of light to penetrate to aquatic plants which generate the oxygen needed for aquatic life.
Microbial contamination of food and beverage products is a potentially catastrophic occurrence resulting in foodborne illness or food spoilage. The same nutritive properties that render cheese and dairy products such a valuable food also provide an ideal growth medium for microbes if contamination occurs.
UV disinfection systems disinfect water using UV light at the 254 nm wavelength. UV light at this wavelength actually destroys the DNA of microbiological material in the water which prevents dangerous viruses such as cryptosporidium and e-coli from reproducing and causing harm.
QuEChERS is a Quick-Easy-Cheap-Effective-Rugged-Safe extraction method that has been developed for the determination of pesticide residues in agricultural commodities.
Many food processors use dissolved air flotation (DAF) to remove fats, oils and grease (FOG) and suspended solids from their wastewater streams.
Though they all must support routing functionality, some devices do it better than others.
Routing consumes more energy, so the lifetime of the battery will be affected. Therefore, a device with a battery that is inexpensive, has a long lifetime, and is easy to change would be ideal. With all this considered, a WirelessHART temperature transmitter is a suitable option to operate as a repeater.
Biochemical Oxygen Demand (BOD) analysis is the test everyone loves to hate—and for compelling reasons.
A recent project by the Water Environment & Reuse Foundation in Tucson, AZ, sought to vet more affordable and environmentally-friendly technologies to achieve potable reuse, with promising results.
When it comes to disinfection at treatment plants, chlorine has quite the reputation. To some, it’s known as a reliable and trusted solution. To many others, especially among the public at large, it’s looked at with skepticism and concern – but that may be simply a matter of not knowing the facts. Either way, it’s one of the ubiquitous aspects of water and wastewater disinfection… and for good reason.
I recently returned from a work trip to Alaska, where I met with colleagues from EPA’s Alaska Operations Office and Alaska’s Department of Conservation to discuss a variety of water-related issues and tour a few facilities, communities, and projects.
Late last month, a panel of regulators appointed by Governor Rick Scott narrowly approved the first changes to Florida’s surface-water quality standards since 1992. Marked with adamant support on one side and passionate protest on the other, the sweeping amendment has left questions about how clean Florida’s water will be.
In September of 2015, EPA and USDA sponsored a three-day national workshop at the Robert B. Daugherty Water for Food Institute in Lincoln, Nebraska that brought together more than 200 experts and leaders representing the agricultural community, utilities, environmental NGOs, private investors, states, cities, and tribes to discuss how to expand the country’s small but growing water quality trading markets.
This article is the fifth in a series on industrial water treatment focusing on inorganic contaminants. While regulatory limits are being established, the process of identifying a cost-effective treatment process should be undertaken. Potential water treatment processes for inorganic contaminants can be grouped into three categories: physical, chemical, and biological. This article will describe the biological treatment technologies that may be considered.