DRINKING WATER TREATMENT
The Roche Harbor Water Treatment Plant is located on the northwest side of San Juan Island in San Juan County, Washington state. Although a significant part of the land in the county is privately owned, the watersheds there provide a public benefit for both residents and visitors. San Juan Island’s economy is tourist-driven; the island was voted #2 on the New York Times list of “41 Places to go in 2011.” Its marina has been a top boating destination for more than fifty years. Incorporated in 1886, the community has seen slow but steady population growth in recent decades. Roche Harbor Water System Inc. has been in operation since 1968 when PVC piping replaced the island’s existing wooden pipe system.
DRINKING WATER TREATMENT CASE STUDIES AND WHITE PAPERS
Cyanide Analysis Of Wastewater Samples From FCC And Hydrocracking Operations
Fluid catalytic cracking (FCC) is a major unit operation in refineries around the world. FCC is used to convert lowvalue, high molecular weight feedstocks such as shale oil, tar sands oil, and coker gas oils into lighter, high-value products by “cracking” C-C bonds.
Preventative Service, Maintenance Helps Protect Technology Investment, Water Resources The need to conserve water is a common concern throughout the world. Whether it is due to cost of water, availability of water, or environmental discharge concerns, the importance of water is a major focal point, both in the public and private sector. By Siemens Industry, Inc. - Water Technologies
Town Of Hillsborough Relies On Hach For Free-Ammonia Testing And Nitrification Control When Bay-area water wholesaler San Francisco Regional Water System (SFRWS) changed its residual drinking water disinfection process from chlorine to chloramine, the town of Hillsborough’s Water Quality staff faced the challenge of updating its water testing procedures to prevent nitrification and continue to meet state-mandated drinking water quality standards.
Understanding Differences Of Boiler Feedwater Pretreatment Equipment
As a water treatment professional, there are several reasons for understanding the various types of boiler pretreatment equipment. By Dave Christophersen,Veolia Water Solutions & Technologies
Drinking Water Disinfection: Tianjin, China (Case Study)
Favorable reviews of UV technology in wastewater applications influenced Tianjin Economic Development Area (TEDA) Water Supply General Company to investigate the potential of using UV for drinking water applications at one of its water treatment plants. With no previous UV installations for drinking water disinfection in the country, TEDA's process of selecting a UV manufacturer was stringent. We are honored that they chose us and our TrojanUVSwift™ system.
MVC Evaporator Technology To Treat And Reuse Produced Water From A SAGD Facility
The SAGD Facility is called "Orion" and consists of 4 major processes: Steam Generation, Injection/Recovery Wells, Deoiling and Water Purification, for recovery of oil. SAGD (Steam Assisted Gravity Drainage) is a technique to recover bitumen from the oil sands formation. By Aquatech International Corporation
New Technologies Set To 'Disrupt' The Industry
For the unfamiliar, the term “disruptive technology” initially sounds quite bad, as though it describes something that gets in the way. Far from impeding progress, however, disruptive technologies actually accelerate progress exponentially by disrupting the status quo. Think personal computers vs. mainframes, or cell phones vs. land lines.
Understanding ISE Measurements In Wastewater Process Monitoring
Analytic measuring technique provides a huge number of procedures to determine the concentrations of substances in an unknown sample, e.g. photometry, titration or mass spectrometry.
5+1/2 Keys To Ozone Disinfection Success
Ozone disinfection of water has been a common practice for nearly 100 years. By Thoram Charanda, Chief Scientist, Guardian Research & Development Labs and Louis LeBrun, PE, Vice President, Pinnacle Ozone Solutions, LLC
Top 10 Considerations When Converting To On-Site Hypochlorite
Transporting pure salt - the raw material needed to generate sodium hypochlorite onsite – is more cost effective, stable, and safer, than transporting and storing bulk sodium hypochlorite, or gaseous/liquid chlorine cylinders from local chemical suppliers. The conversion to on-site hypochlorite generation can be achieved by adhering to these design guidelines.
DRINKING WATER TREATMENT APPLICATION NOTES
Comparison of UV vs. Sodium Hypochlorite (Fact Sheet)
Hypochlorite has some significant environmental concerns associated with DBPs and residual toxicity.
Application Note: Ozone Measurement In Potable Water Ozone is a powerful oxidizing agent that can be used to destroy the organic compounds that affect the taste and odor of potable water. Environmental concerns have led to increased use of ozone because, unlike chlorine, it does not form hazardous by-products. By Emerson Process Management, Rosemount Analytical
Hach LDO® Technology Improves The Efficiency Of Pharmaceutical Plant’s Wastewater Treatment Process
Bristol-Myers Squibb (BMS) is a global pharmaceutical and related health care company with the mission to extend and enhance human life. One of the company’s oldest and largest facilities was built in 1943 in East Syracuse, New York, when BMS was one of 12 companies chosen by the federal government to mass produce penicillin.
Advanced On-Line Instrumentation Helps DAF Systems Lower Costs
Many food processors use dissolved air flotation (DAF) to remove fats, oils and grease (FOG) and suspended solids from their wastewater streams.
Monitoring Nitrates In Drinking Water And Wastewater
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.
Real-Time Monitoring-Through Swell And High Water Application article about water quality monitoring pontoon providing continuous data in the Burry Inlet, an estuary in Wales. By YSI
Real-Time Conductivity Monitoring Estimates Chloride Levels In Minnesota Watershed By Using The Aqua TROLL 200 Monitoring deicing chemical levels can help researchers, city governments, and regulatory agencies understand runoff impacts on surface water, groundwater, and surrounding environments.
Application Note: Employing Best Water Quality Monitoring Practices To Reduce Runoff During Construction Under proposed EPA stormwater runoff guidelines, construction site operators will be required to actively monitor or sample stormwater discharges daily. The enhanced effluent rules take effect in August 2011 for construction sites that disturb 20 or more acres and February 2014 for sites that disturb 10 or more acres, and they may stipulate a strict numerical limit of less than 280 NTU for average turbidity (sediment in water) on any day. By YSI
Application Note: Analysis Of Effect On Water Quality Due To Leaching From Water Works Equipment Materials Using The TOC-VCSH Along with the revision of the drinking water quality standard of the Water Works Law, a part of the Japanese Ministry of Health, Labour and Welfare ordinance providing the technical standards for water works facilities was revised
On-Line Phosphorous Measurement Takes The Guesswork Out Of Alum Treatment
Phosphorous promotes eutrophication in surface waters and helps create conditions for algal blooming and oxygen depletion. Some phosphorous removal can occur naturally in a conventional biological wastewater treatment facility, but the result is not reliably compliant with increasingly strict limits on permissible phosphate levels in effluent discharged to receiving streams, ponds and lakes. By Bob Dabkowski, Hach Company
DRINKING WATER TREATMENT PRODUCTSMore Drinking Water Treatment Products
LATEST INSIGHTS ON DRINKING WATER TREATMENT
Waste Heat Recovery For Desalination From Steam Power Plants
Currently, in the Kingdom of Saudi Arabia about 1.5 million barrels of oil are consumed daily to generate electricity to drive reverse osmosis desalination plants. This represents about 15 percent of KSA’s daily oil production.
Everything Old Is New Again
As water treatment plant managers face relentless challenges — aging infrastructure, stricter watershed protection regulations, higher energy costs, growing water scarcity, and tighter budgets — solutions are emerging that blend computer-age technology with the tried-and-true practice of granular media filtration. By Jim Lauria, Senior Vice Director-Water Treatment, Bilfinger Water Technologies
Generating Disinfectants From Water: Could In Situ Electrolytic Production Be The Future?
Chemical disinfection using strong oxidants involves the transportation, storage, and handling of unstable and/or aggressive and hazardous chemicals. The production of oxidants at the location where they are to be used has therefore been a preferred option, especially in small-scale or remote installations. On-site electrolysis of NaCl for the local production of chlorine or hypochlorite, or the production of ozone-enriched oxygen by silent discharge has been standard for years. However, it is possible to take the idea of producing chemical disinfectants locally a step further and look at in situ techniques, i.e. at devices, which produce oxidants in and from the water to be treated. By Dr. Samuel Stucki, Scientific Consultant to Innovatec Gerätetechnik GmbH,Germany
9 Best Bets In Membrane Technology
A review of the most impressive, high-potential technologies featured at this year’s Membrane Technology Conference & Exhibition (AWWA/AMTA) in Las Vegas.
Maintaining Data Acquisition Capabilities Through Storms, Cyber Attacks
Not all technology holds up during a weather emergency. Electricity often fails, communication methods are compromised, and computer networks go offline.
Instrumentation: Dos And Don’ts For The Water Industry
To say that instrumentation, automation, and control are key to the modern wastewater industry is somewhat of an understatement. With growing populations, tighter consent parameters, and the need to do more for less, operational efficiency is more and more important.
DRINKING WATER TREATMENT NEWS
DRINKING WATER TREATMENT VIDEOSMore From Drinking Water Treatment Videos
ABOUT DRINKING WATER TREATMENT
Drinking Water Treatment involves the removal of pathogens and other contaminants from source water in order to make it safe for humans to consume. Treatment of public drinking water is mandated by the Environmental Protection Agency (EPA) in the U.S. Common examples of contaminants that need to be treated and removed from water before it is considered potable are microorganisms, disinfectants, disinfection byproducts, inorganic chemicals, organic chemicals and radionuclides.
There are a variety of technologies and processes that can be used to decontaminate or treat water in a drinking water treatment plant before the clean water is pumped into the water distribution system for consumption.
The first stage in treating drinking water is often called pretreatment and involves screens to remove large debris and objects from the water supply. Aeration can also be used in the pretreatment phase. By mixing air and water, unwanted gases and minerals are removed and the water improves in color, taste and odor.
The second stage in the drinking water treatment process involves coagulation and flocculation. A coagulating agent is added to the water which causes suspended particles to stick together into clumps of material called floc. In sedimentation basins, the heavier floc separates from the water supply and sinks to form sludge, allowing the less turbid water to continue through the process.
During the filtration stage, smaller particles not removed by flocculation are removed from the treated water by running the water through a series of filters. Filter media can include sand, granulated carbon or manufactured membranes. Filtration using reverse osmosis membranes is a critical component of removing salt particles where desalination is being used to treat brackish water or seawater into drinking water.
Following filtration, the water is disinfected to kill or disable any microbes or viruses that could make the consumer sick. The most traditional disinfection method for treating drinking water uses chlorine or chloramines. However, new drinking water disinfection methods are constantly coming to market. Two disinfection methods that have been gaining traction use ozone and ultra-violet (UV) light to disinfect the water supply.