DRINKING WATER TREATMENT

City Solves Reliability And Maintenance Problems For WTP Hypo Feeds

A municipal water quality manager reports replacement of sodium hypochlorite (hypo) vacuum feeder units with a more advanced type at one water treatment plant (WTP) has helped allow for continued reliability for chlorination.

DRINKING WATER TREATMENT CASE STUDIES AND WHITE PAPERS

  • Sensor Technology For Control Of Activated Sludge Aeration
    Sensor Technology For Control Of Activated Sludge Aeration

    Design routines and operation strategies for activated sludge aeration systems have traditionally been based on manual control. By Robert Smith, P.E., BCEE, Ph.D., YSI

  • Article: Water Quality Management Using Cloud Computing - Solution For Corporate Control Of Environmental Impact Data
    Article: Water Quality Management Using Cloud Computing - Solution For Corporate Control Of Environmental Impact Data One of industry’s most vexing impediments in responding to environmental problems has been difficulties in properly centralizing and managing captured water quality data. A different approach from the heretofore standard (and now outdated) “consultant-centric,” spreadsheet-based environmental information management system — with its typical project delays and increased costs — is now essential. By Locus Technologies
  • Making Accurate pH Measurements
    Making Accurate pH Measurements

    Like the old saying goes, give a man a watch and he always knows what time it is. Give him two watches and he never knows the correct time. What do watches have to do with pH? In this article, we will tie the analogy of accurate time to pH measurement and show how to make more accurate, dependable and believable pH measurements by using three pH sensors.

  • Biothane Delivers Anaerobic Wastewater Treatment To Veryfine Products
    Biothane Delivers Anaerobic Wastewater Treatment To Veryfine Products

    Biothane’s turnkey project was designed to treat wastewater by providing a series of treatment processes. Pre-treatment consists of a bar screen, influent sump, grit removal and rotary screen to remove debris from the influent stream.

  • Versatility Of Thermal Mass Flow Meters
    Versatility Of Thermal Mass Flow Meters

    There are many well documented flow meter technologies that are essentially trying to accomplish the same thing: measure fluid flow rate. Some of the technologies that are entrenched in the market, such as flow meters that utilize differential pressure as the measurement principle, are well understood by customers. Thermal mass flow meters however, such as the Magnetrol® Thermatel® TA2, are a rapidly growing technology that is continuously evolving.

  • Project Profile: City of Aurora, Oregon
    Project Profile: City of Aurora, Oregon In late 2009, Water Works Engineers contacted AdEdge to design and implement an arsenic, iron and manganese removal system to serve the City of Aurora, Oregon. By AdEdge Technologies Inc.
  • Biological Filtration For Iron And Manganese Removal

    In an earlier papers, the author reviewed the physical-chemical processes conventionally used to remove iron and manganese from groundwater and explained how the process most commonly used in France (aeration + filtration) led to the discovery of coincident biological phenomena. These were subsequently applied to enhance the performance of certain existing units and, especially, to serve as a basis for a new generation of biological treatment plants offering sharply improved performance levels. By Pierre MOUCHET, Manager of Technical Assistance and Information

  • High-Power UV Lamps Lower Replacement Costs, Reduce Maintenance
    High-Power UV Lamps Lower Replacement Costs, Reduce Maintenance

    The Tesla Water Treatment Facility is located in Tracy California approximately 60 miles west of San Francisco in the Central Valley of California. Since 1934, San Francisco has received water from the Hetch Hetchy Reservoir in Yosemite National Park via the 167 mile long Hetch Hetchy Aqueduct. Due to the pristine nature of the water source, the water is unfiltered and was only chlorinated at the 75 year old Tesla Portal facility.

  • Two Phase Flow Considerations For Coriolis Meters
    Two Phase Flow Considerations For Coriolis Meters

    Two phase flow is notoriously problematic for most flow technologies. Read how ABB is tackling the 2-phase flow problem through an entire meter-design approach, which entails a state of the art electronics platform and innovative sensor technology. By Ron DiGiacomo

  • Deuel Vocational Institution (DVI) ZLD Drinking Water Treatment System, Tracy, CA

    A study was conducted by an environmental engineering firm to design a suitable treatment system for the groundwater currently used as the potable water supply for DVI. Reverse Osmosis (RO) was determined to be an effective technology in meeting the applicable standards for water quality.

More Drinking Water Treatment Case Studies and White Papers

DRINKING WATER TREATMENT APPLICATION NOTES

  • Removal Of DBPs With Activated Carbon
    Removal Of DBPs With Activated Carbon

    In order to reduce the formation of harmful disinfection byproducts in drinking water, alternative disinfectant use has become increasingly widespread. Monochloramine is a leading alternative disinfectant that offers advantages for municipal water. This tech brief details the removal of monochloramine using activated carbon.

  • Disinfection: Free Chlorine Measurement In Drinking Water Treatment
    Disinfection: Free Chlorine Measurement In Drinking Water Treatment Before water can be used as a safe and reliable source for drinking water, it must be properly treated. Since water is a universal solvent, it comes in contact with several different pathogens, some of which are potentially lethal, and inactivation is accomplished through chemical disinfection and mechanical filtration treatment. This treatment consists of coarse filtration to remove large objects and pre-treatment which includes disinfection using chlorine or ozone
  • Disinfection: Chlorine Measurement By Amperometric Sensor Chlorine in aqueous solutions is used for a number of purposes such as disinfection, taste and odor control, bleaching, and as a powerful oxidizing agent in various manufacturing processes. Chlorine is a costly chemical and requires large amounts of energy to produce. About 3000 KWH are required to produce a ton of chlorine from brine, and the delivered cost ranges from $160 to $300 per ton. As energy becomes more expensive, so inevitably will chlorine. By Emerson Process Management, Rosemount Analytical Liquid
  • Bringing Efficiency And New Confidence To BOD₅ Analysis

    Biochemical Oxygen Demand (BOD) analysis is the test everyone loves to hate—and for compelling reasons.

  • Water Quality Monitoring: Turbidity Monitoring In Drinking Water Treatment Plants Turbidity, or the relative clarity of a liquid (in this case drinking water), is caused by the presence of microscopic particles such as clay, silt, or other fine undissolved matter
  • 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
  • Application Note: Troubleshooting A pH Electrode

    Many factors affect performance of a pH electrode. When performance degrades, it is always a challenge for the analyst to identify the cause. Common troubleshooting procedures, which include evaluation of slope, electrode drift, time response, and accuracy, take considerable time. By Thermo Fisher Scientific

  • Organics Monitoring (TOC)

    Total organic carbon (TOC) testing is the traditional method for determining organic matter in water. However there is a far more practical, affordable and often more useful way to measure organic matter. UV absorbance testing (UVA) is rapidly becoming the preferred method of measuring organics even when the levels of organics being measured are very small.

  • Advanced On-Line Instrumentation Helps DAF Systems Lower Costs
    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.

  • Busseron Creek Watershed Partnership Addresses Concerns In A Rural Watershed As with other watershed organizations, the Busseron Creek Watershed Partnership (BCWP) exists because of surface water quality degradation. In this case, those waters drain 163,231 acres of a watershed that crosses the boundaries of Vigo, Clay, Green, and Sullivan counties in West- Central Indiana. By YSI
More Drinking Water Treatment Application Notes

DRINKING WATER TREATMENT PRODUCTS

Filtration: SAF Series

Filtration: SAF Series

The SAF series are automatic filters with a self-cleaning mechanism driven by an electric motor. The SAF filters are designed to work with various types of screens in filtration degrees from 500 to 10 micron
WEDECO PRO3MIX Bromate Control System

WEDECO PRO3MIX Bromate Control System

The ozone oxidation of affected drinking water sources with high levels of bromide may lead to bromate formation in the product water. Bromate in drinking water is undesirable as it‘s a suspected human carcinogen. The PRO3MIX bromate control system is an intelligent ozone-based advanced oxidation process (AOP) introduction and reaction system enabling ozone treatment in a compact and intelligent design to mitigate bromate formation even in cases of high level bromide in source water.

Grundfos Booster Module Systems

Grundfos Booster Module Systems

The BMS range is a new range of booster modules for reverse osmosis and ultra-filtration applications that improve efficiency with a directly coupled pump powered by a permanent magnet motor and VFD.

Wastewater Recycle/Water Reuse

Wastewater Recycle/Water Reuse

Aquatech provides wastewater recycle/water reuse systems that incorporate their experience with many technologies associated with wastewater treatment associated with industrial applications.

TruLab 1310 And 1310P Laboratory Benchtop Meters

TruLab 1310 And 1310P Laboratory Benchtop Meters

The YSI TruLab® line includes the 1110 (single channel), 1310 and 1310P (single channel) and 1320 and 1320P (dual channel) instruments providing easy-to-use and calibrate instruments ideal for the laboratory.

Constant Chlor® Plus MC4-50 Dry Calcium Hypochlorite Feeding System

Constant Chlor® Plus MC4-50 Dry Calcium Hypochlorite Feeding System

Based on feedback from actual field users, The Constant Chlor Plus MC4-50 dry calcium hypochlorite feeding system prepares and automatically delivers a consistently accurate dose of liquid available chlorine for disinfection applications.

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LATEST INSIGHTS ON DRINKING WATER TREATMENT

  • Understanding Salt Passage Vs. Salt Rejection In Reverse Osmosis Systems
    Understanding Salt Passage Vs. Salt Rejection In Reverse Osmosis Systems

    Knowing the dynamics of membrane separation and distinguishing salt rejection and salt passage and how they’re calculated is necessary to understand the unique operational behaviors of reverse osmosis (RO), nanofiltration (NF), microfiltration (MF), and ultrafiltration (UF) systems.

  • A Beginner’s Guide To On-Site Sodium Hypochlorite Generation
    A Beginner’s Guide To On-Site Sodium Hypochlorite Generation

    Why buy, transport, and store chlorine when you can make your own? Here are nine questions to consider before adopting the practice.

  • 8 Questions For Every Water Utility After The UCLA Water Main Break
    8 Questions For Every Water Utility After The UCLA Water Main Break

    The water and mud from the big water main break that flooded the UCLA campus in Los Angeles in late July left behind several questions that could be asked of every water supplier in the country.  Find out for yourself how vulnerable your home town’s water supply is to leaks and breaks with these eight questions. By Ed Osann, NRDC senior water policy analyst

  • Water Quality Issues? It Might Be A Storage Tank Maintenance Problem
    Water Quality Issues? It Might Be A Storage Tank Maintenance Problem

     Every drinking water utility works to avoid disinfection byproducts (DBPs), discoloration, and taste and odor issues. But often those problems occur outside of the treatment scheme entirely.

  • Reflective UV Cuts Energy Use By 90%
    Reflective UV Cuts Energy Use By 90%

    NeoTech has created a new reflective ultraviolet (UV) disinfection technology that requires only eight lamps— roughly 1/10 of the number of lamps required in similar flow-sized conventional UV systems—and only about 2kw of power.

  • Decrease Membrane Treatment Capital And O&M Costs With Optimum Flux Rates
    Decrease Membrane Treatment Capital And O&M Costs With Optimum Flux Rates

    Despite a global effort to standardize units of measure to the metric system, the water treatment industry still follows the U.S. trend in resisting that directive by referring to water volumes in treatment plants as gallons per day (GPD).  While achieving a specified permeate GPD is certainly important in overall membrane plant design, production capacity has absolutely nothing to do with determining optimal methods of treating site-specific feedwaters and offers no indication of potential membrane fouling rates and related maintenance costs. To evaluate these factors, knowledgeable professionals rely on membrane flux rates as the key consideration in achieving optimal system design and operation. By Harold G. Fravel Jr., Executive Director, American Membrane Technology Association and Karen Lindsey, VP, Avista Technologies, Inc.

More Drinking Water Treatment Insights

DRINKING WATER TREATMENT VIDEOS

TrojanUVTorrent™ Drinking Water UV Disinfection System (Video)

TrojanUVTorrent™ Drinking Water UV Disinfection System (Video)

The TrojanUVTorrent™ is the solution for large-scale drinking water facilities in need of revolutionary UV disinfection technology.

Low Flow Sampling Using A TROLL® 9500 Water Quality Instrument

The TROLL® 9500 Water Quality Instrument simplifies multiparameter monitoring. The TROLL 9500 is a powerful, portable unit that houses up to nine water quality sensors, internal power, and optional data logging capabilities.

Introducing EXO - A New, State-Of-The-Art Water Monitoring Platform Video

Introducing EXO - A New, State-Of-The-Art Water Monitoring Platform Video

EXO, a state-of-the art water quality monitoring platform, is designed to address the many challenges of collecting accurate field data in the natural environment.

Building Water Confidence With UV Disinfection (Video)

Building Water Confidence With UV Disinfection (Video)

TrojanUV is dedicated to providing the world with more efficient, environmentally-friendly water treatment solutions. This video shows how we’re helping municipalities deliver water confidence to their communities.

Video: UAT™ Membrane Filtration Systems

Video: UAT™ Membrane Filtration Systems

Using high quality components, the skid-mounted UAT systems are engineered to effectively produce treated water, free of particulate matter or contaminants
More 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.