chlorine analyzer Articles | Environmental XPRT

Chemscan mini analyzers monitor sulfite and chlorine levels - Case Study

Problem: The wastewater plants in Clarkson and Guelph, Ontario use chlorine for disinfection but have severe limits on the concentration of chlorine residual that can be discharged. The receiving stream has limited capacity and is populated by aquatic life sensitive to chlorine. The usual approach to this problem is to feed sulfite in sufficient concentration to de‐chlorinate the effluent. ...

Jul. 29, 2019

By ChemScan, Inc.

Explosion-proof chlorine analyzers facilitate chlorination and discharge compliance of LNG terminal - Case Study

The Dunkirk LNG terminal in France is owned and operated by the EDF subsidiary Dunkerque LNG. The terminal has facilities such as a berthing station with the hosting capacity of around 80 LNG tankers a year, unloading system and storage facilities. The LNG is transported to storage tanks by methane tankers equipped with reinforced hulls and double-walled tanks.The berth installed at the terminal ...

May 10, 2017

By AppliTek NV

Optimal use of chlorine in water distribution networks based on specific locations of booster chlorination: analyzing conditions in Mexico

Water distribution networks (WDNs) could present problems of pathogen intrusion that affect the health of consumers. One solution to diminish this risk is to add more disinfectant to the water at the drinking water treatment plant (DWTP). However, this increases the cost of water treatment and may also cause the formation of trihalomethanes. Mexico has the largest bottled water market in the ...

Nov. 4, 2015

By IWA Publishing

Controlling the addition of Chlorine into a Process

There are several methods for controlling the addition of chlorine into a process. These methods include flow proportional injection, ORP (oxidation reduction potential) or a residual chlorine analyzer. Each method measures a different process characteristic. Depending on the specific type of process being controlled, there generally is a best choice for controlling the injection of either ...

Jan. 1, 2007

By Walchem, Iwaki America Inc.

East Bay Municipal Utility District Successfully Manages Chloramine Residual in Ten Million Gallon Reservoir with the Process Solutions, Inc. Monoclor Chloramine Management System

Located on the eastern side of the San Francisco Bay, the East Bay Municipal Utility District (EBMUD) treats and distributes water to over 1.3 million customers in Alameda and Contra Costa counties. As one of the largest utility districts in California, EBMUD is a leader in the water industry’s water quality, conservation and sustainability efforts. EBMUD chloraminates water prior to ...

Oct. 7, 2015

By Process Solutions, Inc. (PSI)

Online Process Analyzer Installed at F.J. Horgan WTP to Monitor Chloramination

Construction was completed on the City of Toronto's F.J. Hor-gan Water Treatment Plant in 1979, more than 60 years after chloramine had first been used to disinfect drinking water in an Ottawa plant. By then there was little debate about the benefits of chloramination and it was incorporated into the new plant's design as part of the disinfection process. Chloramine is more stable than free ...

Mar. 1, 2010

By ChemScan, Inc.

Modeling and analysis of chlorine dioxide, chlorite, and chlorate propagation in a drinking water distribution system

The drinking water distribution system of Cremona, in the north of Italy, was monitored for 6 years (2006–2011) analyzing chlorine dioxide, chlorite, and chlorate concentrations. The software Epanet 2.0 (USEPA) was applied to the distribution system. The mixing zone of the water coming from the two drinking water treatment plants, respectively located to the west and east of the city, was ...

Oct. 19, 2016

By IWA Publishing

Choosing Right Methods for the Chlorine Disinfections to Meet Daily E. coli Limit in a Large Nitrification Plant

Indiana is one of a few states that has replaced a weekly Fecal limit with a daily E. coli limit as an indicator organism for wastewater disinfection. It has been accepted that E. coli is a better organism indicator. However, there is still not an EPA approved method for enumerating E. coli in wastewater. Indiana has adopted several different methods for use by wastewater treatment plants for ...

Oct. 21, 2006

By Water Environment Federation (WEF)

Chlorination by-products of fenitrothion

The mutagens produced through chemical reaction between chlorine and the insecticide fenitrothion were studied by using a quadrupole GC-MS. The mutagenicity and the mutagen formation potential (MFP) of the identified by-products were evaluated by the Ames assay (preincubation method) using Salmonella typhimurium TA100 without exogenous activation by S9 mix (TA100-S9). Before conducting GC/MS ...

Jul. 1, 2010

By IWA Publishing

Effects of mixing on chloramination process

According to a recent study more than 90 percent of water treatment plants utilizing chloramination for distribution system residuals indicate a certain level of dissatisfaction toward the process performance. One factor that may lead to such dissatisfaction is the inadequacy of mixing when ammonia is added to chlorinated water. If mixing is not instantaneous and uniform, the actual chlorine to ...

Sep. 1, 2010

By IWA Publishing

Energy and exergy analyses of the drying step of a copper-chlorine thermochemical cycle for hydrogen production

Hydrogen can be produced by decomposing water, through thermochemical cycles, in an environmentally benign manner using nuclear energy. The copper-chlorine (Cu-Cl) cycle is one of the most promising low-temperature thermochemical cycles and involves five main steps: HCl (g) production; oxygen production; copper (Cu) production; drying; hydrogen production. In this study, energy and exergy ...

Sep. 21, 2009

By Inderscience Publishers

Capillary GC Analyses of Chlorinated Pesticides in Dry Pet Food

Based on federal and state regulations for identifying and quantifying low levels of pesticides in food and environmental samples, we selected three capillary columns to screen for chlorinated pesticides. A nonpolar and two low/intermediate polarity phases were chosen to evaluate differences in component elution order and retention times. Low level screening analyses were performed effectively ...

Dec. 31, 1995

By MilliporeSigma

Pasco County uses total life cycle costing to select chloramination analyzers - Case Study

Pasco County, Florida Water Utilities serves its customers with water from its 58 permitted wells blended with the water supplied by its large regional supplier, Tampa Bay Water. In 2002 Tampa Bay Water converted to monochloramine disinfection because of its advantages over free residual chlorine. Monochloramine is more stable and better extends the disinfectant residual throughout the ...

Jul. 29, 2019

By ChemScan, Inc.

Accidental Releases Analysis for Toxic Aqueous Solutions

As a result of the cluster rule for the control of the hazardous air pollutants, pulp and paper mills are in the process of further substituting chlorine with aqueous chlorine dioxide for their bleaching operations. In addition, ammonia aqueous solutions are applied by paper mills in various processes. An evaporation model including both heat and mass transfer for aqueous solutions has been ...

Jun. 1, 1998

By BREEZE Software, Data and Services / Trinity Consultants

Accidental releases analysis for toxic aqueous solutions

Abstract As a result of the cluster rule for the control of the hazardous air pollutants, pulp and paper mills are in the process of further substituting chlorine with aqueous chlorine dioxide for their bleaching operations. In addition, ammonia aqueous solutions are applied by paper mills in various processes. An evaporation model including both heat and mass transfer for aqueous solutions has ...

Dec. 12, 2011

By Trinity Consultants

Evaluation of chlorine decay models under transient conditions in a water distribution system

Residual chlorine concentration decreases along distribution networks because of factors such as water quality, physical properties of the pipeline, and hydraulic conditions. Hydraulic conditions are primarily governed by transient events generated by valve modulation or pumping action. We investigate the impact of transient events on the rate of chlorine decay under various flow conditions. ...

Mar. 8, 2017

By IWA Publishing

PR04 - Can ICA save costs?

Untitled Document Ofwat expects Water Companies in England and Wales to make savings on their operating costs by achieving greater efficiency, but further belttightening can’t offer much more scope without putting performance at risk. ICA (instrumentation, control and automation), on the other hand, offers real potential for increased efficiency if it is ...

Feb. 1, 2005

By WRc plc

Reconciling ‘actual’ risk with ‘perceived’ risk for distributed water quality: a QFD-based approach

This paper explores the application of the quality function deployment (QFD) approach to identify and prioritize factors to reconcile ‘actual’ risk with ‘perceived’ risk for drinking water in a distribution network. Consumers' complaints (regarding water odour, taste, colour and other problems) and consumers' perception about water safety are used to define customers' requirements (aka ‘whats’). ...

Sep. 1, 2011

By IWA Publishing

Watson-Marlow peristaltic pumps in breakthrough application - Case Study

South West Water is using a peristaltic pump from Watson-Marlow Fluid Technology Group for dosing coagulant into raw reservoir water for purification purposes. It is thought to be the first time peristaltic technology has been used on a coagulant application, certainly within the southwest region. Originally the plant, near Falmouth in Cornwall , employed two conventional diaphragm pumps, ...

Apr. 5, 2006

By Watson-Marlow Fluid Technology Group

Bidet toilet seats with warm-water tanks: residual chlorine, microbial community, and structural analyses

Despite the reported health-related advantages of the use of warm water in bidets, there are health-related disadvantages associated with the use of these toilet seats, and the bacterial research is sparse. We conducted a survey on the hygienic conditions of 127 warm-water bidet toilet seats in restrooms on a university campus. The spray water from the toilet seats had less residual chlorine ...

Aug. 20, 2015

By IWA Publishing

Subscribe to our eBulletins