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  • Ozone System Delivers For Miramar Water Treatment Plant Upgrade And Expansion Project
    Stormwater Regulations and Legislation Industrial Food Beverage Petroleum Refining All Petroleum Refining Produced Water Power Generation Water Reuse Utility Management AMR AMI and Metering Asset Management Consumer Outreach Funding Labor Resiliency SCADA Automation Source Water All Source Water Contamination Desalination Water Scarcity Water Reuse Regulations and Legislation Providers YSI a Xylem brand Hach Company Schneider Electric Neptune Technology Group Inc Evoqua Water Technologies Veolia Water Solutions Technologies ABB Measurement Products Aclara Jacobi Carbons Endress Hauser Inc KROHNE Inc Kaeser Compressors Inc Emerson Process Management Rosemount Analytical Degremont Technologies Brentwood Industries View All Providers Case Study August 15 2015 Ozone System Delivers For Miramar Water Treatment Plant Upgrade And Expansion Project Source METAWATER USA Inc A combination of growing demand aging infrastructure and regulatory requirements acted as drivers for a new ozone system at the Miramar Water Treatment Plant in San Diego CA This case brief provides the specifications scope of supply and system design diagram for the ozone disinfection system supplied by MetaWater that continues to support the city s multi barrier approach METAWATER USA Inc Contact The Supplier Contact Details Company Profile MORE FROM METAWATER USA Inc Contact Details Company Name METAWATER USA Inc Address 301 Route 17 N

    Original URL path: http://www.wateronline.com/doc/ozone-system-delivers-for-miramar-water-treatment-plant-upgrade-and-expansion-project-0001 (2016-02-14)
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  • Theoretical Operation Of High-Efficiency Ultraviolet Water Treatment Chamber
    Petroleum Refining All Petroleum Refining Produced Water Power Generation Water Reuse Utility Management AMR AMI and Metering Asset Management Consumer Outreach Funding Labor Resiliency SCADA Automation Source Water All Source Water Contamination Desalination Water Scarcity Water Reuse Regulations and Legislation Providers YSI a Xylem brand Hach Company Schneider Electric Neptune Technology Group Inc Evoqua Water Technologies Veolia Water Solutions Technologies ABB Measurement Products Aclara Jacobi Carbons Endress Hauser Inc KROHNE Inc Kaeser Compressors Inc Emerson Process Management Rosemount Analytical Degremont Technologies Brentwood Industries View All Providers White Paper April 16 2014 Theoretical Operation Of High Efficiency Ultraviolet Water Treatment Chamber Source NeoTech Aqua Solutions Inc By J R Cooper Ph D NeoTech Aqua Solutions Inc The NeoTech Aqua ReFleX water purification chambers are the most efficient and compact units available today They require an order of magnitude less energy and less than 25 of the system volume to achieve the same or better purification result as competing chambers This is the first in a series of three white papers explaining the benefits of these systems This paper explains in detail the theory behind the operation of these chambers including some computational examples of performance The second paper presents both in house and third party data demonstrating that performance in full scale systems as well as describing the protocols under which those data were taken The final white paper presents an analysis of those results which show that the unique optical nature of the ReFleX chamber leads to the capability to measure the dose delivered to a target contained within the chamber simply by measuring the intensity of the ultraviolet light at a single point on the chamber wall and the water flow through the chamber Newsletter Signup SIGN ME UP YOU MAY ALSO LIKE Contact Details Company Name NeoTech Aqua

    Original URL path: http://www.wateronline.com/doc/theoretical-operation-of-high-efficiency-ultraviolet-water-treatment-chamber-0001 (2016-02-14)
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  • Hydro-Guard Improves Water Quality And Saves Man-Hours For Central Texas Vacation Community
    Funding Labor Resiliency SCADA Automation Source Water All Source Water Contamination Desalination Water Scarcity Water Reuse Regulations and Legislation Providers YSI a Xylem brand Hach Company Schneider Electric Neptune Technology Group Inc Evoqua Water Technologies Veolia Water Solutions Technologies ABB Measurement Products Aclara Jacobi Carbons Endress Hauser Inc KROHNE Inc Kaeser Compressors Inc Emerson Process Management Rosemount Analytical Degremont Technologies Brentwood Industries View All Providers Case Study March 10 2015 Hydro Guard Improves Water Quality And Saves Man Hours For Central Texas Vacation Community Source Mueller Co The user population of the Horseshoe Bay Water Distribution System does not reach its peak until summer and the resultant levels of peak and low usage vary widely This fluctuation impacts levels of disinfectant residual and consequently water quality especially at the end of the line Maintaining proper disinfectant residual is not traditionally problematic for closer lines of the system Also manual flushing of the utility s hydrants to maintain water quality has resulted in excessive time and labor as workers must access the outlying areas Horseshoe Bay wanted to make this automated flushing project part of a much more comprehensive program to maintain water quality in our system Mueller Co Contact The

    Original URL path: http://www.wateronline.com/doc/hydro-guard-improves-water-quality-and-saves-man-hours-for-central-texas-vacation-community-0001 (2016-02-14)
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  • Membrane Treatment Of Groundwater
    water systems and aimed to use it in this situation to characterize the nature of the treatment problems If the issue was found to be biological ATP tests would be used to help monitor the efficacy of both disinfection and membrane treatment throughout this optimization study Results The pre chlorination rate was set to a reduced rate compared to the previous dosage during the mid summer months in hopes of establishing a middle ground where DBP formation was reduced while still cutting down the organics loading and color in the raw water After several days the following results were seen compared to before the change in chlorine dosing Table 1 Effects of Pre Chlorination on Microbial Loading 10pg mL Acceptable 10pg mL Contaminated While the reduced chlorination prior to membrane filtration reduced the organics loading and DBP production the microbial loading at the plant inlet became significantly higher The treated water quality also suffered as was seen from the Skid 3 Permeate test but plant personnel decided to allow the experiment to continue for the time being since the increased microbial content of the permeate was determined to be not significant After an additional week under these conditions though the treatment plant was shut down due to excessively high pressure differentials across the membranes The ATP results at the time of shut down were as follows Table 2 Effects of Long term Removal of Pre Chlorination The effects of reduced pre chlorination are clearly seen here by the significant increase in microbial loading to the plant between the Station 1 Effluent and the Plant Influent At the time of this measurement the raw water carried no chlorine residual neither free nor total so there were no barriers to the proliferation that occurred in the pipeline This increased loading resulted in significant fouling of the pre filters and eventual microbial breakthrough and significant membrane fouling Membrane fouling was confirmed by testing the surfaces of the end cap of a membrane in addition to a deposit that was removed from the membrane surface Table 3 Results of Membrane Biofilm Analyses These values for surface buildup were 10 100 times higher than what would be considered tolerable although they were not surprising considering the magnitude of the bioburden in the water feeding the membranes Upon seeing this a series of membrane cleanings took place to remove the fouling that had developed Table 3 illustrates the efficacy of this cleaning Table 4 Effects of Membrane Cleaning According to these results it is clear that the cleaning cycle did an excellent job to clean the fouled membranes The product water quality is now in the acceptable range 10pg mL and therefore carries a lower risk for microbial proliferation downstream assuming that an acceptable disinfectant residual is maintained It was now clear that a certain degree of disinfection was necessary to minimize fouling of the pre filters and membranes in the plant so after the cleaning process the following changes were instituted to the operating procedure

    Original URL path: http://www.wateronline.com/doc/membrane-treatment-of-groundwater-0001 (2016-02-14)
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  • Leopold Clari-DAF Pretreatment System Reduces Chemical Consumption Doubles Treatment Capacity At Boulder Water Treatment Facility
    Asset Management Consumer Outreach Funding Labor Resiliency SCADA Automation Source Water All Source Water Contamination Desalination Water Scarcity Water Reuse Regulations and Legislation Providers YSI a Xylem brand Hach Company Schneider Electric Neptune Technology Group Inc Evoqua Water Technologies Veolia Water Solutions Technologies ABB Measurement Products Aclara Jacobi Carbons Endress Hauser Inc KROHNE Inc Kaeser Compressors Inc Emerson Process Management Rosemount Analytical Degremont Technologies Brentwood Industries View All Providers Case Study March 25 2015 Leopold Clari DAF Pretreatment System Reduces Chemical Consumption Doubles Treatment Capacity At Boulder Water Treatment Facility Source Leopold A Xylem Brand Together two water treatment plants in Boulder CO have the capacity to treat 55 million gallons per day MGD When severe drought conditions restricted the source water supply of the Betasso WTP the city decided to expand the capacity of the Boulder Reservoir Water Treatment Plant WTP Using Leopold s Clari DAF systems the plant experienced a 29 percent reduction in chemical clarification costs With the higher designed loading rate of the Clari DAF system as compared with the old up flow clarifier the Boulder Reservoir WTP doubled its capacity while using less than half of the existing space Leopold A Xylem Brand Contact The

    Original URL path: http://www.wateronline.com/doc/leopold-clari-daf-pretreatment-chemical-treatment-boulder-water-treatment-facility-0001 (2016-02-14)
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  • Dissolved Air Flotation Technology Nearly Doubles Treatment Capacity
    Source Water All Source Water Contamination Desalination Water Scarcity Water Reuse Regulations and Legislation Providers YSI a Xylem brand Hach Company Schneider Electric Neptune Technology Group Inc Evoqua Water Technologies Veolia Water Solutions Technologies ABB Measurement Products Aclara Jacobi Carbons Endress Hauser Inc KROHNE Inc Kaeser Compressors Inc Emerson Process Management Rosemount Analytical Degremont Technologies Brentwood Industries View All Providers Case Study March 21 2015 Dissolved Air Flotation Technology Nearly Doubles Treatment Capacity Source Leopold A Xylem Brand Faced with a tight capital budget a city in British Columbia required a new design for a water treatment plant capable of a maximum daily water production of 21 MPG during peak demand periods with an ultimate demand of 29 MGD The city was advised to rely more heavily on a nearby creek which had poorer water quality but could meet the plant s future water supply The Leopold Clari DAF system was installed which provides the flexibility to treat both the creek at any time of year to the desired water quality levels The cost effective retrofit achieved the highest benefit to cost ratio at lowest life cycle cost and should meet the projected water demand for the next half century

    Original URL path: http://www.wateronline.com/doc/dissolved-air-flotation-technology-nearly-doubles-treatment-capacity-0001 (2016-02-14)
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  • The Nationwide Impact Of California’s Hexavalent Chromium Regulations
    the adverse health effects of low level Cr VI exposure via ingestion are less clear Much of the debate about Cr VI s human health risk centers on how effectively ingested Cr VI is detoxified by the gastrointestinal tract At present the EPA has not finalized its findings regarding the health risks of Cr VI via ingestion although the State of California independently concluded that ingestion of Cr VI in water at levels greater than 10 μg L represents an unacceptable public health risk Detection Of Chromium In Drinking Water Chromium can be accurately measured to sub part per billion concentrations using widely available analytical techniques Total chromium concentrations are determined by inductively coupled plasma mass spectrometry ICP MS per EPA Method 200 8 Hexavalent chromium is measured by ion chromatography followed by spectroscopic detection per EPA Method 218 7 There is no accepted method for direct measurement of Cr III Instead Cr III concentrations are calculated by difference subtracting the Cr VI concentration from the Cr tot concentration Technologies For The Treatment Of Chromium In Drinking Water Currently few utilities in the U S operate a full scale treatment system specifically designed to remove Cr VI from drinking water However there have been a number of bench and pilot level studies evaluating chromium treatment technologies Based on the results of these studies there are four Cr VI treatment technologies capable of meeting California s 10 μg L MCL Strong base anion exchange SBA Weak base anion exchange WBA Nanofiltration reverse osmosis membranes NF RO Reduction coagulation filtration RCF NF RO membranes remove Cr VI by forcing contaminated water under pressure through a semipermeable membrane Hexavalent chromium along with other dissolved contaminants is retained by the membrane through a combination of size exclusion and electrostatic repulsion effects Depending on the specific design of the membrane rejection of up to 95 percent of Cr VI is possible As with all NF RO systems they are hydraulically inefficient A typical recovery the ratio of water produced to water treated is 75 to 80 percent Hence membrane systems are undesirable in arid sections of the country where water resources are scarce In addition disposal of the residual waste stream in which most contaminants are concentrated to four to five times their background level is often problematic SBA exchange removes Cr VI by passing the contaminated water through a bed of polymeric resin with chloride ions attached to charged functional groups integrated into the resin The negatively charged Cr VI ions displace the chloride ions attaching the Cr VI ions to the resin while releasing chloride ions into the treated water Once the resin is exhausted and there are no additional sites on the resin to take up Cr VI the resin is regenerated with a high concentration sodium chloride solution The chloride ions reattach to the resin and Cr VI is released into the salt solution for disposal A similar process is used to treat arsenic and nitrate in drinking water Pilot testing

    Original URL path: http://www.wateronline.com/doc/the-nationwide-impact-of-california-s-hexavalent-chromium-regulations-0001 (2016-02-14)
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  • Contaminant Removal Case Studies and White Papers Documents on Water Online
    the theoretical basis for the very high efficiency demonstrated by the chamber The third paper describes how this chamber design leads to some highly desirable operational advantages beyond just energy ad cost reduction By J R Cooper Ph D and Gwynne Cavender NeoTech Aqua Solutions Inc Retrofit Significantly Reduces Backwash Cycle Interval Duration And Water Use For Georgia Utility 7 17 2015 The North Columbus Resource Facility recently completed a 12 million replacement of its settled water filtration removing the existing Wheeler filters their three part media and 10 inch poured concrete underdrains which were no longer efficient Biological Drinking Water Treatment Microbiological Considerations For The Operation And Control Of Biofilters 12 22 2014 It s well known the beneficial role that particular groups of microorganisms have in the food and beverage industry Similarly are the beneficial aspects that either engineered or non engineered biological treatment systems have in the drinking water production process Thinking About Medicines And Personal Care Products In Drinking Water 11 3 2015 Examples of medicines and personal care products detected in water include antimicrobial materials found in toothpastes and hand soaps fragrances prescription medicines bug sprays and sunscreen Concentrations of these substances detected in water are typically very small and are currently not regulated at the federal level in the U S Desalination Serves Coastal Argentine City 6 30 2015 When a series of water crises in 2014 disrupted conventional utility services in the coastal Argentine city of Caleta Olivia the city needed a way to ensure an uninterrupted water supply Municipal Drinking Water Facility Installs UV System To Deactivate Cryptosporidium And Giardia 11 18 2014 The City of Berea public water system provides service to approximately 20 000 people using surface water drawn from the East Branch of the Rocky River however supplies can

    Original URL path: http://www.wateronline.com/hub/bucket/contaminant-removal-whitepapers-case-studies (2016-02-14)
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