feed water Articles | Environmental XPRT

Proper Valve Trim Extends Life of Boiler Feedwater Valves

In competitive power markets, combined cycle facilities are experiencing more operating cycles than owners initially planned for at the design stage. It’s not uncommon for a combined cycle plant to experience more than 250 starts per year these days.While the ability to cycle a large combined cycle plant is ideal for fleet flexibility, frequent startups and shutdowns strain many critical ...

Jul. 25, 2019

By Anhui JiPeng Engineering Supervision and Consulting Co.,Ltd

Transparent exopolymer particles (TEP): A critical factor in aquatic biofilm initiation and fouling on filtration membranes

Transparent exopolymer particles (TEP) are sticky organic microgels, ubiquitous in natural waters, which have been implicated as a potentially important factor in the development of aquatic biofilm. An experimental cross-flow membrane array was used to investigate the relationship between the rate of membrane clogging and levels of TEP and other water quality variables in a lake water source. In ...

Apr. 14, 2011

By Israel Oceanographic and Limnological Research (IOLR)

Fibreboard plant recycles plant effluent

The Facility Laminex Industries in Gympie, Queensland, Australia is a leading producer of medium density fibreboard-based panel products. The Problem Laminex Gympie is a zero wastewater discharge site. Laminex was installing a second plant at their site to expand production capacity. It became apparent that borewater quantity and quality was unpredictable, therefore Laminex decided to recycle ...

Sep. 14, 2010

By Aquatech International Corporation

How to Overcome Feedwater Changes in Reverse Osmosis Systems

1. INTRODUCTION: FEEDWATER QUALITY IN REVERSE OSMOSIS PLANTS Feedwater analysis has always been the most important criterion to design and estimate the performance of brackish-water reverse osmosis plants. It is also one of the first things to check when plant performance deteriorates. In environments where feedwater salinity is irregular, design and performance can not rely on analysis made ...

Nov. 8, 2020

By Watercore

Reliability analysis of digital feedwater regulating valve controller system using a semi–Markov process model

A semi–Markov process model is developed for the reliability analysis of Main Feedwater Valve (MFV) controller system that is used for regulating the water level in a steam generator. The proposed model is generalisation of a Markov process model reported in the literature and allows the use of non–exponential distribution for various state transition times.Keywords: digital instrumentation, ...

Jan. 25, 2012

By Inderscience Publishers

Operating Electrodeionization in a High-Silica Feedwater Environment

High silica feedwaters pose two challenges for ultrapure water membrane systems. On the front end, silica can scale the RO membranes, limiting use of some feedwaters and high water recovery. On the back end, silica can scale the IX resins in the electrodeionization (EDI). It is also a challenge to attain the very low ppb levels of silica in the ultrapure product water required by power and ...

Mar. 29, 2018

By SnowPure Water Technologies

Boiler feedwater deaerators

The thermophysical deaerator is by far the most applied technology when oxygen and carbon dioxide in Boiler Feed Water must be reduced to negligible concentrations Bono ARTES has inherited the experience in the design of Deaerators that started up within the BONO Group in 1959. The Boiler Feed Water, if in equilibrium with the atmosphere, may contain significant levels of corrosive gases, mainly ...

Mar. 6, 2009

By Cannon Bono Energia S.p.A. - part of the Cannon Group

SnowPure at Aquatech Mexico 2019 in September

Visit us at USA Pavilion Stand 615SnowPure Water Technologies is in the prime position in the USA Pavilion at the upcoming 2019 Aquatech Mexico Exhibition in Mexico City. Please stop by our booth to see Dr. Michael Snow (President), Janell Cedarstrom (International Sales Manager), and Eduardo Campos (Sales).Dr. Michael Snow will take to the Aquastage along with other industry leaders on ...

Aug. 7, 2019

By SnowPure Water Technologies

SnowPure Water at Aquatech Mexico September 2018

SnowPure Water Technologies has the prime position in the USA Pavilion (booth 615) at the upcoming Aquatech Mexico exhibition, September 4-6, 2018. We will discuss electrodeionization (EDI), RO membranes for dealing with high silica feedwaters, DC power supplies, and pharmaceutical, laboratory, hospital and hemodialysis, and power generation applications. The 2017 exhibition was a success, and ...

Jul. 14, 2018

By SnowPure Water Technologies

Membrane contactors are used as a boiler feedwater deaerator

Proper treatment of boiler feedwater is an important part of operating and maintaining a boiler system. As steam is produced, dissolved solids become concentrated and form deposits inside the boiler, leading to poor heat transfer and reduction of boiler efficiency. Dissolved gasses, such as oxygen and carbon dioxide react with metals in the boiler system, resulting in boiler corrosion. These ...

Oct. 1, 2003

By 3M Membrane Filtration (formerly Membrana)

Geometric issues in reverse osmosis: numerical simulation and experimentation

This investigation is a synergistic combination of laboratory experimentation and numerical simulation to quantify the practical impact of geometric imperfections in the flow channels of a reverse osmosis (RO) system. To this end, carefully executed experiments are performed to quantify the fluid flow in a system containing feed spacers which are embedded in the RO membrane. In a complementary ...

Oct. 29, 2014

By IWA Publishing

Component efficiency of reverse osmosis desalination systems

Technological advancements have changed the way people perceived the world. Now we have advanced in domains such as space exploration and the notable fact to be observed here is that, we can find the solution to any problem, can’t we? The reduction of usable water levels and the increasing concerns for water scarcity in the future is a considerable threat and farsightedness suggests that it ...

Mar. 3, 2017

By Genesis Water Technologies, Inc.

Evaluation of novel hollow fibre membranes for NOM removal by advanced membrane autopsy

A full-scale inside out hollow fibre membrane module was operated in a pilot-scale water treatment plant in Sweden for a period of 12 months from August 2013 to July 2014. Liquid chromatography– organic carbon detection (LC-OCD) chromatogram indicated the membranes could effectively remove 86% of dissolved organic carbon and 92% of humic substances from the feedwater. Routine ...

Nov. 26, 2015

By IWA Publishing

High Purity Boiler Water Production Using Municipal Wastewater at a Combined Cycle Gas-Fired Generating Station

The recovery of wastewater for industrial uses presents many challenges for the design and operation of water treatment equipment. Since the term wastewater can be applied to a wide range of water sources from municipal sewage to storm runoff to industrial discharge water, the water characteristics may have great variability. As such, the equipment to treat wastewater must be robust and ...

Apr. 17, 2013

By Eco-Tec Inc.

A connection between cycle chemistry and condenser configuration: part II

Abstract Air in-leakage into the steam space of a condenser can become stored in pockets of high partial pressures that negatively impact condenser performance and become a source of dissolved gases in the feedwater. These pockets can be configuration caused and generally cannot be eliminated by reducing air ingress or increasing venting capacity. Fortunately, engineering designs are available ...

Jun. 8, 2010

By Intek, Inc.

De-chlorination Application – Proctor and Gamble, NC., USA.

Hanovia Photon UV Systems. Installation Date 2001 System Configuration – Two Hanovia Photon PMD320G4 Dechlorination and Disinfection Systems, complete with Certified UVC Lamps, Validated UV Monitors, Lamp Power Switching, UV Dose Control, and optional Quartz Sleeve Automatic Wipers. Variable Flow: Up to 180 usgpm (40.9m3/hr) per stream Water Quality: Pre R.O. filtered city water. ...

Oct. 25, 2006

By Hanovia Ltd - a Halma Company

Electrodeionización Para Generación de Energía y Farmacéutica

In México, EDI (Electrodeionización) is used to produce pure and ultrapure water for both Generación de Energía y Farmacéutica (USP PW y WFI). The challenge for pure and ultrapure water in Mexico is the silica level. SnowPure works in México with OEMs to choose technologies and processes that will enable good performance and long life for RO (OI) and EDI ...

Jun. 1, 2019

By SnowPure Water Technologies

Visualization of Transparent Exopolymer Particles (TEP) in various source waters.

Transparent Exopolymer Particles (TEP) have been implicated as an important factor in the development of aquatic biofilm on membranes and other surfaces. We have recorded TEP and associated bacteria from four different kinds of source water (coastal seawater, freshwater lake, secondary treated wastewater and saline, high sulfide content groundwater from a deep well) as visualized by light and ...

Nov. 1, 2010

By Israel Oceanographic and Limnological Research (IOLR)

Revised Paradigm of Aquatic Biofilm Formation facilitated by microgel Transparent Exopolymer Particles

PAPER IN PNAS 109 (23) 9119-9124 , 2012 doi/10.1073/pnas.1203708109 ABSTRACT Transparent exopolymer particles (TEPs) are planktonic, organic microgels that are ubiquitous in aqueous environments. Increasing evidence indicates that TEPs play an active role in the process ofaquatic biofilm formation. Frequently, TEPs are intensely colonized by bacteria and other microorganisms, thus serving as ...

Nov. 7, 2012

By Israel Oceanographic and Limnological Research (IOLR)

Industrial reverse osmosis system design

Reverse osmosis (RO) is currently used in various applications ranging from small, undersink drinking water units to large industrial systems. The technology is widely used and accepted as it removes both dissolved ionic and organic impurities. This article will focus on the reverse osmosis technology in industrial applications and will discuss factors that differentiate industrial RO from ...

Jul. 1, 2010

By Agape Water Solutions, Inc.