The overall wastewater treatment process is complex, and each step is integral to ensuring water is properly purified. Effluent ends up in the plants, containing substances that must be removed before the water can be properly cleaned and returned for use. The range of potential contaminants is almost endless, and can include food, pulp, waste, or other substances. Afterwards, the water requires further scrubbing, with the aid of bacteria. It is in this part of the process that compressed air (ideally provided by energy-efficient rotary lobe blowers) plays a vital role.
The Honouliuli Water Recycling Facility (WRF) includes filtration and UV disinfection to treat to Class R-1 reuse standards for various uses, including irrigation. In order to maintain high-level reuse, simplify maintenance, and reduce operation costs, the Honolulu Board of Water Supply decided to replace its 15-year-old TrojanUV4000™ with a TrojanUVSigna™. With the high cost of power in Hawaii, this system upgrade will provide significant power savings (estimated at 75%) and will enable equipment payback in less than 2.5 years.
A large percentage of the flow meters purchased for municipal water plants are replacements for older meters in existing facilities or distribution systems. It’s a common practice to replace aging meters with the same technology, often from the same manufacturer.
Hopkins, Minnesota occupies four square miles of space in southcentral Minnesota, and is home to 17,000 residents. The area is also home to seven lift stations, which pump water and wastewater in various parts of the city – all of which operate with different manufacturer’s equipment. By The Gorman-Rupp Company
After two years operation the plant reports that RoS2S Disk Thickener is consistently producing a 5.5% DS average with an ~0.6% DS average feed at a steady flow of 107 gpm (60 gpm activated, 7 gpm trickling, 40 gpm service water) running 24 hours a day.
In sewage works of Japan near bay areas, the tightening of restrictions on nitrogen and phosphorus has resulted in greater needs for reconstruction and replacement of infrastructure, to switch from the conventional activated sludge process to the advanced treatment process without newly expanding aeration tanks.
Companies using solids-handling pumps as part of their processes know that even though the pumps are typically moving trash and other waste products, the type of equipment used can be a huge business decision. Most applications warrant more attention than simply choosing the first pump that pops out of a catalogue. By The Gorman-Rupp Company
When SAWS in San Antonio sought to upgrade their septage collection system they faced challenges beyond what might be normally seen in a typical WWTP. By partnering with Huber Technology SAWS was able to navigate through challenges and put together a world class system.
The biologically biodegradable waste water from the Leverkusen Chempark and the households of the lower drainage basin for the Wupperverband (Wupper association) is cleaned by Currenta in a community waste water treatment plant.
In February of 2014, due to severe drought conditions, the Federal Bureau of Reclamation informed central California farmers that they would receive no irrigation water from the lakes, canals and reservoirs under the Bureau’s control.
The C445 motor management relay offers the most configurable protection options in the industry, with features specifically designed to protect critical pumps from costly damages due to dead-head and other underloaded or starved pump conditions.
In the summer of 2012, BlueInGreen partnered with a facility in Arkansas to study disinfection of wastewater and removal of emerging contaminants of concern (ECC) by utilizing dissolved ozone. The plant has a firm capacity of 12 MGD and includes primary clarification, activated sludge, secondary clarification, and sand filtration prior to the existing UV system.
The Minnesota River Valley Public Utilities Commission (MRVPUC) provides wastewater treatment for the City of Le Sueur and the City of Henderson in south-central Minnesota. A significant factor facing the utility is the highly varying phosphorus load that challenges operators to meet the utility’s annual average discharge limit of 1.0 mg/L total phosphorus.
A static headspace method was developed using Teledyne Tekmar automated headspace vial samplers to meet the method requirements of the Alcohol and Tobacco Tax and Trade Bureau of the US Department of the Treasury (TTB) method SSD: TM:2001 for testing fusel alcohols in alcoholic beverages.
The QuEChERS (Quick-Easy-Cheap-Effective-Rugged-Safe) sample extraction method was developed for the determination of pesticide residues in agricultural commodities.
Breakdown of organic wastes entering a wastewater treatment plant is accomplished by using a biomass or blend of beneficial microscopic organisms, bacteria, and solids. This converts the non-settleable solids (dissolved and colloidal matter) into settleable solids, carbon dioxide, water, and energy.
Facility administrators will find the advanced ST100 Series Thermal Mass Air/Gas Flow Meter from Fluid Components International (FCI) helps them improve the accuracy of specialty gas point of use and sub-metering operations to achieve accurate billing in their labs for better cost tracking and control.
Chlorine has long been used as a primary disinfection method for many water and wastewater treatment applications. However, there is growing concern about the harmful DBP’s produced by the use of chlorine.
Most of us use computers or smartphones on a daily basis. But we usually don’t know what goes on behind the scenes — the technology that allows us to use cloud computing or even Google search. And we certainly aren’t aware of the infrastructure needed to support that technology — like cooling towers.
New research has developed a membrane technology that repels deadly viruses while maintaining permeability. Is it a ‘must have’ for treatment operations?
Activated sludge has been a cornerstone of wastewater treatment since the early 1900s. Over the years, variations of the activated sludge treatment process have surfaced. These variants were efforts to improve treatment performance or reduce capital or operating costs. A new technology, known as Nereda®, uses aerobic granular sludge to meet all those criteria.
Many utility managers have experienced infrastructure failures caused by corrosion in the collection system — corrosion that leads to sewer collapses, weakened wet wells, and control system failures. These issues are often not addressed until complaints about overflows or odors are received from regulators or customers.
Water professionals are tasked with protecting the public health every minute of every day. They must ensure the removal of contaminants and pathogens from the public water supply. To do so, they employ a variety of treatment methods.
The science behind grit removal is an all-important but underserved aspect of wastewater treatment operations — until now.