Circa 2010, Carollo Engineering designed and implemented expansions at wastewater treatment plants in Delano, California and Reedley, California to handle increased flows of up to 8.8 MGD and 5.0 MGD respectively. The proposals for both facilities specified a need for storage and processing of secondary sludge produced by the processes’ secondary clarifiers. Mazzei Injectors were selected to provide an efficient, zero maintenance method of freshening and mixing the sludge. Read the full case study to learn more.
Publicly Owned Treatment Works (POTWs) are faced with the challenge of processing the effluent wastes of multiple sources: residential, industrial, and environmental. Under laws governing pretreatment, the ultimate responsibility in determining whether or not industrial effluent meets criteria for treatment belongs to the POTW. Once the POTW has the effluent waste within the confines of its treatment facility, it is accountable to the federal, state, and local regulations governing the quality of the wastewater it discharges into lakes and streams or injects underground. By Myron L Company
A natural, environmentally safe and cost-efficient way to ensure that your pond maintains a healthy, aerobic state is through the use of aeration systems. By Robin Bio, Marketing Coordinator
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
St. Joseph Sanitary District No. 1, near La Crosse, WI, operated a wastewater treatment plant (WWTP) that served approximately 1,000 residential customers.
This edition of Disinfection Digest discusses the discharge limit of peracetic acid (PAA) into the environment and the incorporation of dilution factors in the assessment of a site-specific, risk-based residual PAA concentration in wastewater effluents.
According to the U.S. EPA, municipal water and wastewater treatment systems account for 30 to 40 percent of the total energy used by municipalities in the United States. In wastewater treatment, the biggest chunk of this energy consumption comes from aeration. Within a typical WWTP, the aeration equipment used to maintain the required dissolved oxygen (DO) levels in the activated sludge process can account for as much as 60 percent of the total plant energy use (Source: EPA.gov). As municipalities and plant operators look for ways to minimize energy use and contain operating costs, aeration is a natural area of focus.
When municipalities choose to manually feed phosphates into their potable water, this often creates an over-feed of chemicals. Learn how employing an automatic-dosing phosphate analyzer can reduce operating costs and improve reliability.
Northwest Arkansas has been one of the faster growing regions of the United States in the early 2000s. Driven by the growth of the poultry industry as well as education and health professions, the city of Springdale has seen significant economic and population growth. There is also a thriving leisure and hospitality industry as recreation in the Ozarks continues to grow. The population is now estimated to be approximately 80,000 people compared to 46,000 in the 2000 census.
Nitrate is present in high levels in wastewater due in part to the high nitrates present in human sewage but also from some types of industrial effluent entering the municipal sewer system.
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.
Pesticide residue laboratories are required to undertake analyses of an ever increasing number of samples. The analyses typically involve use of multi-residue methods (both GC-MS and LC-MS) to test for over 500 pesticide residues.
Hach LDO® technology improves the efficiency of pharmaceutical plant’s wastewater treatment process, helping to protect the environment and the community.
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.
In the early days of variable frequency drive (VFD) technology, the typical application was in process control for manufacturing synthetic fiber, steel bars, and aluminum foil.
Hot Clean-In-Place (CIP) sanitization is commonly used to combat microbial growth in the pharmaceutical and food and beverage industries. Performed frequently as a prevention strategy, hot water sanitization is a requirement for high purity water (HPW) for United States Pharmacopeia (USP) and European Pharmacopoeia (Ph. Eur.).
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
Last year was full of twists and turns for the drinking water and wastewater treatment industries. What can 2017’s biggest stories tell us about what’s to come this year?
Though some preliminary regulations have taken place to curb the presence of microplastics in the environment, more research is needed to determine what role wastewater treatment plants can and will play in solving the problem for good.
2017 was a transformative year for the smart wastewater sector with major industry advancements such as new ways to detect and prevent combined sewer overflows (CSOs), the advent of a smart wastewater pumping system, and the emergence of innovative business models such as data-as-a-service — all bound to gain more traction in 2018.
A UCLA researcher is adopting biomedical technology for the treatment industry, packing nanoparticles with ammunition to fight a suite of trace contaminants all at once.
Chemicals are among the greatest allies that drinking water and wastewater treatment operations have in the fight against contaminants. But these operations are dependent on the proper technology to administer just the right amount of chemicals at just the right time, ensuring that effluent is neither under- nor overdosed.
As the popularity of hydraulic fracturing continues to strain available water supplies, a new technology may be the key to recycling produced water in an affordable way.