Water from Well 19 and 20 in Sacramento, California area was high in manganese and arsenic. Due to the high levels, the wells were not being used to supply municipal water to the District. Each facility is planned to initially produce and treat approximately 600 gpm with a future expansion capacity to 1200 gpm.
Reverse osmosis, or RO, is one of the finest technologies to purify water containing high total dissolved solids (TDS) levels of more than 500 ppm. Reverse osmosis plant exporters explain the technology as a separation technology where dissolved and invisible impurities in water are separated with the help of semi-permeable membrane or RO membrane that works under high pressure.
Aqua Engineers is a local Hawaiian company founded almost 40 years ago which delivers operations, engineering, and construction management to the water and wastewater industry throughout Hawaii. Also, as an owner and operator, Aqua Engineers is keenly focused on the return on investment for process equipment decisions, but also on the safety of its operators and surrounding community. Read the full case study to learn why Aqua Engineers chose the Microclor OSHG system provided by UGSI Solutions for both their sites in 2016.
The Lariana Depur wastewater treatment plant in Fino Mornasco, Italy, treats wastewater from multiple textile manufacturers in the Como region, known as the heart of the textile industry. Since 1994, ozone has been used effectively as a polisher to remove the dark blue-purple color — the result of the dyes used in the textile dyeing and printing process — from the water.
When Linda Mullen took over as water superintendent in Burnsville in 2007, the city was in the process of adding surface‐water treatment to its existing plant. Burnsville began purchasing water from the nearby Kraemer Mining and Materials quarry, both to supplement its supply and to help the quarry meet discharge permits.
This report summarizes results and conclusions of a groundwater treatment pilot test program. This pilot test program was undertaken to demonstrate the effectiveness of water treatment products that employ oxidation and filtration to remove iron, manganese and arsenic to levels well below MCL’s. Operating data collected during the study will be used to confirm the design of fullscale facilities.
Originally built to treat 10 million gallons per day (MGD), the Quail Creek Water Treatment Plant in Washington County, Utah, now has an operational capacity of 60 MGD and a design capacity of 80 MGD.
The City of Paramount conducted a pilot study for arsenic, manganese and iron treatment system at their Well 15 site. The onsite pilot test was designed to demonstrate the performance of the Loprest Water Treatment Company treatment process proposed for the new treatment plant.
If you thought reverse osmosis was the one and only choice for potable water reuse, think again. Ozonation followed by biological activated carbon (ozone-BAC) is more suited to inland communities and may be better at removing chemicals of emerging concern (CECs).
The North Texas Metropolitan Water District began working to add ozone to its four interconnected water treatment facilities which operate as the Wylie Water Treatment Plant (WTP).
NRDC’s new analysis of the most recent EPA data finds that nearly 30 million people in the United States drank water from community water systems that violated the EPA’s Lead and Copper Rule between January 2015 and March 2018.
The Ecomuseum Zoo is home to the most impressive ambassadors of Quebec’s wildlife. All residents of the Ecomuseum Zoo are there for a special reason: orphaned, injured or born under professional human care, each of them could not return to the wild. Hence, they have found a forever home at the zoo.
The Golden Heart WTP located in Fairbanks Alaska is a lime softened, ground water treatment plant with five filter basins, with a combined surface area of 1495 ft2 . Typical filter loading rates are in the 2.3 –to 3.1 gpm/ft2
As part of a feasibility study for arsenic treatment at an elementary school in California, a pilot study was conducted to test the performance of three different treatment media: (1) greensand and anthracite, (2) standard sand and anthracite, and (3) manganese dioxide.
For remote sites of 35 to 200 people, the newterra PWT-12/50 offers optimal flexibility – adapting to changing camp populations quickly and easily. The base 40' unit is a fully self-contained potable water treatment plant with capacity for up to 50 people.
Pilot tests conducted at numerous facilities demonstrate that Loprest treatment processes successfully reduce iron, manganese, arsenic, nitrate, and many other select contaminants in drinking water to well below the Maximum Contaminant Level (MCL). Loprest can provide self-contained portable, free-standing pilot units or mobile, trailer-mounted units, depending on specific testing needs at each site. Services include unit delivery, setup, and operation. Upon completion of the pilot study, Loprest will prepare a Pilot Study Report and a detailed cost proposal for a full-scale system.
Further reduction of the volume of backwash water requirements can be achieved with the application of the Loprest SYNCRO-CLEANSE® process. This patented design utilizes both air and water for a more efficient backwash operation.
The unique compact design incorporates the best existing Capital Controls® technology with exciting new features. With just three models ranging from 10-10,000 lbs/day capacity, each chlorinator is available with automatic or manual feed and a 10” flowmeter for an easier read. Sonic operation on the 4100 model eliminates the need for a differential pressure regulator. On all automatic models, an additional controller isn’t needed, reducing components – and costs.
Loprest has been providing ion exchange treatment systems for the removal of arsenic, nitrate, perchlorate, hardness, fluoride and other contaminants for many decades. Loprest has the engineering process and application expertise to select the proper exchange resin and design a treatment system that will optimize the system performance.
Loprest designs and manufactures granular activated carbon (GAC) treatment systems for taste and odor applications, chlorine removal, PFC’s, 1 2 3 TCP, PCE/TCE, 1 4 dioxane, and many other contaminants. Loprest has a long, successful history in the selection and application of the proper carbon media for the application.
When it comes to gas injection, it pays to work with an experienced manufacturer that has lived the ups and downs of moving from pilots to full-scale plants. A number of years ago, Mazzei Injector Company ran into an issue where the engineer had specified a system at 2 psi of water pressure.
What are the key innovations that are actually being implemented, here and now, and creating a paradigm shift in water and wastewater treatment? Jess Brown, VP and director of R&D for Carollo Engineers, tackles the question.
The operating ranges for chemical injection need to be large because of the variability of flow in many treatment operations. As Bill McDowell, Vice President of Operations with Blue White Industries explains in this Water Talk interview, “You might be down to as low as 5 or 10 milliliters a minute and then one hour later; you might need to pump 15 gallons a minute out of the same pump and through the same sensor.”
Water treatment plants are responsible for sampling their water quarterly for trihalomethanes (THM). THM are a group of four chemicals that are formed along with other disinfection byproducts (DBPs) when chlorine or other disinfectants used to control microbial contaminants in drinking water react with naturally occurring organic and inorganic matter in water.
It may not be mentioned as Ryan Seacrest begins the countdown on New Year’s Eve, but a few treatment plants scattered across the country may recall 2015 as the year of ballasted treatment.
The BioMag and CoMag systems from Evoqua infuse magnetite into conventional biological and chemical floc, making it heavier and dramatically improving settling. The BioMag system is applied to activated sludge systems.
This video features the lead operator for the ozone and filtration systems at the Sherbrooke Water Filtration Plant in Quebec, Canada, Mr. Yves DelaFontaine. As you’ll see in the video, Yves has high remarks for Pinnacle’s modular capability, built in redundancy and ease of installation, which took place in 2014.
In many water-scarce parts of the country, today’s wastewater is tomorrow’s drinking water. With reuse increasing rapidly, effective disinfection is more important than ever before. One solution that many wastewater and water utilities are turning towards is ozone.
The removal of contaminants from public drinking water systems in the US is mandated by the Environmental Protection Agency’s (EPA) National Primary Drinking Water Regulations. These are legally enforceable standards that protect public health by limiting the levels of contaminants in drinking water. Similar regulations are managed by agencies worldwide to protect their citizens from drinking water contamination.
There are a plethora of drinking water contaminant removal technologies that public and private water systems use to comply with the EPA’s drinking water regulations. These include reverse osmosis, membrane, nanofiltration, ultrafiltration, chlorine disinfection, UV disinfection and Ozone-based disinfection practices.
The EPA’s list of drinking water contaminants is organized into six types of contaminants and lists each contaminant along with its Maximum Contaminant Level (MCL), some of the potential health effects from long-term exposure above the MCL and the probable source of the drinking water contaminant.
The six types of contaminants are microorganisms, disinfectants, disinfection byproducts, inorganic chemicals, organic chemicals and radionuclides.
Examples of microbiological, organic contaminants are Cryptosporidium and Giardia lamblia. Both of these microorganic pathogens are found in human or animal fecal waste and cause gastrointestinal illness, such as diarrhea and vomiting.
A common disinfectant used in municipal drinking water treatment to disinfect microorganisms is chlorine. The EPA’s primary drinking water regulations require drinking water treatment plants to maintain a maximum disinfectant residual level (MDRL) for chlorine of 4.0 milligrams per liter (mg/L). Some of the detrimental health effects of chlorine above the MCL are eye irritation and stomach discomfort.
Similarly, byproducts from the chlorine-based disinfection methods used by public water systems to remove contaminants can be contaminants in their own right if not removed from the drinking water prior to it being released into the distribution system. Examples of disinfection byproducts include bromate, chlorite and total trihalomethanes (TTHMs). Not removed from drinking water, these disinfection byproducts can increase risk of cancer and cause central nervous system issues.
Chemical contamination of drinking water can be caused by inorganic chemicals such as arsenic, barium lead, mercury and cadmium or organic chemicals such as benzene, dichloroethane and other carbon-derived compounds. These chemicals get into source water through a variety of natural and industrial processes. Arsenic for example is present in source water through the erosion of natural deposits. Many of the chemical contaminants are derived from industrial wastewater such as discharges from petroleum refineries, steel or pulp mills or the corrosion of asbestos cement water mains or galvanized pipes.
Radium and uranium are examples of radionuclides. Radium 226 and Radium 228 must be removed to a level of 5 picocuries/liter (PCI/L) and Uranium to a level of 30 micrograms/liter (30 ug/L).
