Not cool enough in summer. Not warm enough in winter. Guests staying at a prestigious country club in New York state complained regularly about the air conditioning and heating of their luxury suites and apartments. By Martin Dingman, Product Manager, Siemens Industry Inc.
A brief introduction into sludge digestion by means of aerators and aerobic mixers that are located on-site is provided. Rationale for treating on-site as well, as is a discussion of sludge characteristics and how they may be addressed are similarly considered. This is an introduction only and will be followed by development of the topic in more detail in later papers. By Dr. J.H. Wakefield, consulting scientist/engineer
In central district heating systems, heated water from power plants is distributed to densely populated areas via insulated piping networks. High water quality is required to maintain the integrity of pipes, storage tanks, and other infrastructure in such systems. This case study explains how a Dutch power station achieved an O2 specification of <10 ppb for storage water tank filling by installing a chemical-free deoxygenation system.
Minimize pumping time, cut fuel consumption, reduce costs and ultimately boost profits with greater “pump maintenance know-how.” By The Gorman-Rupp Company
The steel industry has historically presented challenges for effective water treatment because it is a high water user and the applications may involve high heat, critical noncontact cooling, direct contact cooling, high suspended solids waters, oil and grease contamination, and complicated cascading. By Dave Christophersen, Veolia Water Technologies
The City of Gordon Texas’s drinking water facility was struck by lightning. Thinking long term, and desiring the latest technology available, the City took this opportunity to upgrade their on-line instrumentation with a range of new continuous monitoring on-line instruments including chlorine analyzers, pH monitoring, temperature monitoring, and turbidity monitoring.
Spikes in peak demand at the 3.0 MGD Freedom District Water Treatment Plant in Carroll County, MD, exceeded 70 percent of the plant’s capacity, and the existing clarifier made for a lengthy sludge-removal process. After staff installed a dissolved air flotation (DAF) pretreatment system to improve the efficiency of the membrane filters, the now 4.0 MGD facility has reduced maintenance for operators. The system also safeguards against pathogens that can pass through traditional sand/diatomaceous (S/D) filters.
Purportedly the largest bar screens in the United States, the Headworks two (2) Mahr Bar screens, almost 70 feet in overall length, is installed in Mill Creek WWTP in Cincinnati, Ohio.
A high water recovery rate is essential for this well-known soy protein manufacturer.
Anaerobic digestion processes that radically improve the quality of wastewater while delivering green energy extracted from biological waste streams are emerging as a profitable way for agricultural and food processing industries cope with the twin impact of drought and pollution challenges.
The Littleton/Englewood wastewater treatment plant, Colorado, put in place processes to effectively monitor the levels of ammonia in their wastewater treatment.
Lift stations are remote pumping facilities that move wastewater from lower to higher elevation. Monitoring lift stations is important to collection system operators.
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.
Hypochlorite has some significant environmental concerns associated with DBPs and residual toxicity.
Monitoring phosphate during the wastewater treatment process allows for fine-tuning and optimizing chemical dosing for removal of phosphate, which provides significant cost savings to the plant while protecting the aquatic environment downstream of the facility.
Homes, industry, schools, and businesses all generate sanitary waste, or sewage. Sewage treatment is a multistage process that cleans up wastewater before discharge or reuse. In the final step of the treatment, disinfectants are added to kill disease-causing organisms. Common disinfectants are chlorine gas and sodium hypochlorite. Chlorine dosage levels are designed to leave almost no residual in the wastewater after treatment
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.
Chicago is giving its oldest wastewater treatment facility a disinfection facelift and using the world’s largest reservoir to curb combined sewer overflows.
In the summer of 1864, French chemist Louis Pasteur was vacationing in the small eastern town of Arbois where he found the local wines too acidic for his palette.
The treatment process for all sewage starts at the same place — the headworks. Inlet works facilities are responsible for a variety of pretreatment processes, including initial debris screening and removal.
‘Sewer mining’ may sound like a search for mistakenly flushed and washed-away valuables, but it’s actually a sophisticated, sustainable strategy for combating water scarcity.
Each year, the oil and gas industry produces more than 800 billion gallons of wastewater. Coupling the massive volumes of wastewater generated over the life of the well and the millions of gallons of water needed to hydraulically fracture each well, it’s easy to see that oil and gas exploration and production is just as much a water issue as it is an energy issue.
Mines throughout Pennsylvania contain millions of gallons of contaminated water, putting thousands of stream miles at risk.