Ph Monitoring Articles on Environmental XPRT

Monitoring pH and ORP in a SHARON reactor

This paper analyses the valuable information provided by the on-line measurements of pH and oxidation reduction potential (ORP) in a continuous single high ammonia removal over nitrite (SHARON) reactor. A laboratory-scale SHARON reactor equipped with pH, ORP, electric conductivity and dissolved oxygen (DO) probes has been operated for more than one year. Nitrogen removal over nitrite has been ...

Jan. 1, 2011

By IWA Publishing

Cycle chemistry pH measurement

pH measurement in high purity water has met with variable success. The high resistivity of pure water, the vulnerability to contamination, the variability of reference electrodes and additional temperature effects converge to make tins a particularly challenging measurement. Overcoming these obstacles requires a thorough understanding of the potential problems and their systematic solution. ...

Nov. 13, 1998

By SnowPure Water Technologies

pH Probe Maintenance

The success or failure of pH measurement depends on the proper application of the probe and proper subsequent maintenance of the probe. The procedures described within apply to the most common pH probe in use today and that is the flat surface combination pH probe. The most common failure mode associated with pH probes is breakage. The pH electrode is a very thin glass membrane that is easily ...

Jul. 14, 2010

By Digital Analysis Corp.

Getting back to basics: What is pH?

Getting back to basics: What is pH? The most used measure in wastewater treatment, and for good reasons The “potential of hydrogen” or “pH” is the measure of free hydrogen activity in water and thereby indicative of the measure of its free acidity or free alkalinity. Gauged on a numeric scale of 0-14, solutions with a pH of less than 7.0 are acids. ...

Feb. 9, 2014

By Environmental Services by Daniel L. Theobald

DOD evaluates bioaugmentation for remediating low-pH aquifers

The US Department of Defense (DOD) has completed pilot-scale work on the 'MAG-1' site at Fort Dix, NJ, to test suitability of anaerobic bioremediation for an aquifer with low pH. Project results will be used to design full-scale ground-water treatment at MAG-1. In addition, technical criteria gained from the demonstration will be integrated into DOD’s remediation strategy for its many facilities ...

Mar. 30, 2009

By The Hazardous Waste Clean-Up Information (CLU-IN)

How can I measure the pH of food?

Measuring pH in food is a useful indicator of consistency over batches for quality control but can also be used to monitor foods where the pH changes over time – for example in yogurt production, brewing or to test the freshness of foods. Standard pH electrodes will often struggle when used in food samples, as the reference junction becomes blocked the reaction time will get slower and ...

Aug. 28, 2015

By Camlab Limited

Ph and total solids control for concrete producers

Fortrans Inc. manufactures a self-contained pH control and monitoring system that uses CO2 gas to neutralize high pH process water and lower total suspended solids in process water produced at ready mixed concrete plants. The Model 5000S pH Control and Monitoring System offers precise pH control, monitoring of pH and lowers “Total Suspended Solids” of process water contained in pits, ...

Apr. 1, 2010

By Fortrans, Inc.

Is pH a red herring when it comes to ocean acidification?

New research points to saturation state, not pH, as the most pressing metric to track when it comes to shellfish survival. In 2007, the owners of Whiskey Creek oyster hatchery on the Oregon coast lost almost all of their larvae — and had no idea why. The only clue was that the larval die-offs often occurred during intense upwelling events, when ...

Feb. 5, 2015

By Ensia

Using biofilms for monitoring metal contamination in lotic ecosystems: The protective effects of hardness and pH on metal bioaccumulation

Biofilms can make good bioindicators and biomarkers, offering a convenient tool to monitor metal contamination in streams that results from mine tailing sites. Biofilm metal content (Cu, Zn, Cd, Pb) as well as diatom diversity and the presence of teratologies (diatom abnormalities) were determined for biofilms from rivers with a variety of physico‐chemical properties across a metal ...

Oct. 28, 2015

By John Wiley & Sons, Ltd.

What are the key steps in measuring pH? Why do I need to calibrate?

pH is a useful parameter which is used across all industries for quality control, environmental monitoring, lab work and much more. There are 10 key steps which should be followed to ensure pH measurements using a meter are accurate. pH is a useful parameter which is used across all industries for quality control, environmental monitoring, lab work and much ...

Feb. 11, 2015

By Camlab Limited

Drinking water quality control: control charts for turbidity and pH

Water treatment processes are required to be in statistical control and capable of meeting drinking water specifications. Control charts are used to monitor the stability of quality parameters by distinguishing the in-control and out-of-control states. The basic assumption in standard applications of control charts is that observed data from the process are independent and identically ...

Sep. 26, 2016

By IWA Publishing

ORP and pH Based Control of SBR Cycles for Nutrient Removal from Wastewater

ABSTRACTContinuous monitoring of multiple process functions were conducted involving removals of BOD, TSS and nutrients, in each cycle of the SBR reactor at the wastewater treatment plant of the City of Carrabelle, FL. On line, real time, monitoring of pH, oxidation reduction potential (ORP), dissolved oxygen (DO), ammonia-N, nitrite-N, nitrate-N and orthophosphate-P demonstrated excellent ...

Oct. 22, 2006

By Water Environment Federation (WEF)

Using CoBupH MG to adjust aquifer pH - Case Study

Problem A US Government site had elevated TCE. Low aquifer pH stalled in situ bioremediation. ...

Oct. 10, 2016

By EOS Remediation, LLC

One step, low pH iron and organics removal - Case Study

Review For over seven years, the semiconductor facility performed routine on-site cleans of their reverse osmosis (RO) membranes using RoClean P111 with good results. However, over a six month period in 2015, membrane cleaning frequency increased to once a month and permeate flows could not be sufficiently restored. An Avista application specialist visited the site to personally monitor the ...

Oct. 1, 2016

By Avista Technologies

Low-pH Ammonia Oxidation at a Biological Nutrient Removal Facility

ABSTRACTMcAlpine Creek Wastewater Management Facility (MCWWMF), owned and operated by Charlotte Mecklenburg Utilities (CMU) of Charlotte, North Carolina, is permitted to treat 64 million gallons per day (mgd). Along with MCWWMF, three CMU treatment plants discharge effluent into the Catawba River just upstream of the South Carolina border. CMU worked with North and South Carolina regulators ...

Oct. 22, 2006

By Water Environment Federation (WEF)

3 Essential Things You Need to Know Before Buying a pH Data Logger

Measurement of the pH of a solution is very common in industrial manufacturing processes, plating, wastewater treatment and environmental monitoring. Logging this data provides you with information on long-term trends and the impact of various external factors on changes in pH, and can also be used for control, compliance reporting and alarming. However, to capture accurate pH measurements with ...

Jul. 6, 2012

By CAS DATALOGGERS

Critical evaluation and further development of methods for testing ecotoxicity at multiple pH using Daphnia magna and Pseudokirchneriella subcapitata

To meet the requirements of risk assessment legislature regarding the ecotoxicity of ionizing compounds, the present study attempts to establish easy, robust methods for testing ecotoxicity at various pH levels. An overview is given of the buffering methods in the literature. This is supplemented by a series of experiments where toxicity and ability to stabilize pH of eight common buffering ...

May 15, 2012

By John Wiley & Sons, Ltd.

Gas Detection and Monitoring Systems

In greenhouse applications, the accurate measurement of a number of environmental parameters such as carbon dioxide concentration, temperature, light intensity, water, humidity, pH and nutrient levels using sophisticated sensors is used to create a controlled environment for optimising plant growth rates while minimising energy usage. Carbon dioxide concentration is also one of the best ...

Feb. 11, 2016

By Edinburgh Instruments Ltd

Organics Monitoring: A Practical Guide

Preventing product loss, lowering waste treatment costs, and reducing system maintenance and energy consumption through organics monitoring in the chemical, refining, food, and wastewater treatment industries. Summary Process water and steam condensate contamination includes organic, inorganic, and biological components. Sources of organic contamination include process ...

Apr. 6, 2015

By GE Analytical Instruments

Investigation of the solution initial pH effects on the performance of UV/Fe-ZSM5/H2O2 process

Effect of the solution initial pH was investigated on the performance of photo-Fenton process using Fe-ZSM5 zeolite as a heterogeneous catalyst for degradation of azo dye Acid Red 14. All experiments were performed in a 1.0 L tubular closed circulation batch photo-reactor. The dye degradation quantum yield was maximal when the solution initial pH was about 5. An amount of about 0.3 mg L−1 of Fe ...

Apr. 1, 2010

By IWA Publishing

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