Water Filtration Articles

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Case study - Algae control in fire reservoir Häagen Dasz production facility

by LG Sonic  (Jul. 1, 2016)

A 77 meter rainwater reservoir for fire extinguishing purposes was completely covered with filamentous green algae. The green filamentous algae clogs regularly filters located before the jockey pumps.  The Challenge: Control Green Algae and Lower the Use of Oxygen Peroxide Located in Tilloy-lès Mofflaines, France, the 77 meter long ...

Flush Mounted Valve Exposed

by Containment & Filtration Solutions  (Jun. 7, 2016)

The “Other Guys'” answer to standing water??  The flush mounted valve. The “Other Guys'” answer to standing water is the Flush Mounted Valve.  This is a second valve that is installed adjacent to the primary valve and flush with the bottom of the insert allowing for complete drainage. As seen ...

Parallel evaporation after extraction of liquid dairy samples following the Mojonnier method (ISO 1211:2010) – gravimetric fat determination

by BÜCHI Labortechnik AG  (May 19, 2016)

Parallel evaporation after extraction of milk samples with the Mojonnier The fat in liquid dairy samples is usually extracted with an organic solvent that is then evaporated to complete dryness prior to gravimetric analysis. In this short note, initial conditions and evaporation settings for the parallel evporation of milk fat dissolved in ...

Assessment of the quality, effectiveness, and acceptability of ceramic water filters in Tanzania

by IWA Publishing  (May 10, 2016)

Globally, approximately two billion people drink contaminated water. Use of household water treatment (HWT) methods, such as locally manufactured ceramic filters, reduces the diarrheal disease burden associated with unclean water. We evaluated the quality, effectiveness, and acceptability of ceramic filters in two communities in Arusha, ...

Flint Must Make Us Ask: Is Our Water Ready for an Emergency?

by Genesis Water Technologies, Inc  (May 4, 2016)

In emergency situations, providing access to and cleansing water is as important as the availability of the water itself. Even when available, non-potable is a significant danger. The United Nations says diarrhea caused by consuming unsafe water is a top cause of morbidity due to malnutrition, contributing to roughly 60% of deaths of children ...

gaiasafe filter products for drinking water purification - Case Study

by gaiasafe GmbH  (Apr. 25, 2016)

Problem In some water works chlorination of drinking water is used to eliminate mikrobes. Chlorinated water may have disagreable taste and smell. Some water works use aluminium salts to clean the water. This leads to low concentrations of aluminium in drinking water. Today it is known that aluminium may be toxic to men. Old piping installations ...

Tabas coal preparation plant wastewater treatment with membrane technology

by IWA Publishing  (Apr. 22, 2016)

The goal of the present work is the Tabas coal preparation plant wastewater treatment using membrane technology. Polyacrylonitrile membrane was prepared through phase inversion method and then developed by annealing process. Also, high fouling resistance membranes were prepared by the embedding of TiO2 nanoparticles using self-assembling and ...

Case study - WESPs: Securing a cleaner future for power-generating facilities

by Beltran Technologies, Inc.  (Apr. 11, 2016)

This article explains why wet electrostatic precipitators remain a viable technology for dealing with today's increasingly stringent compliance issues. Despite recent, recession-related volatility in both power generation and consumption, industry analysts expect a resumption of long-term growth trends as continued global demand for energy ...

The Application of Waste Solids Management Vertical Cuttings Dryers as an integral element of a successful Solids Control System

by Elgin Separation Solutions - Elgin Equipment Group (EEG)  (Apr. 2, 2016)

In Elgin’s last White Paper, “Common Challenges Relative to the Use of Decanter Centrifuges for Barite Recovery in the Oil & Gas Industry,” a detailed discussion was offered about the complexities involved in achieving effective solids control when deploying a dual-centrifuge “barite ...

Rapid novel test for the determination of biofouling potential on reverse osmosis membranes

by IWA Publishing  (Mar. 31, 2016)

A novel method was proposed to determine biofouling potential by direct analysis of a reverse osmosis (RO) membrane through fluorescence intensity analysis of biofilm formed on the membrane surface, thereby incorporating fouling tendencies of both feedwater and membrane. Evaluation of the biofouling potential on the RO membrane was done by ...

Injecting Innovation Into The Food And Beverage Industry

by KLa Systems, Inc.  (Feb. 22, 2016)

Not all water treatment needs are the same. That’s why it’s imperative to work with those that understand the subtle differences that make each industry unique. For food and beverage companies, that means aligning with a company focused on oxygen transfer with a track record of innovation in jet aeration and mixing. Water Online spoke ...

Flux-step method for the assessment of operational conditions in a submerged membrane bioreactor

by IWA Publishing  (Feb. 8, 2016)

A flux-step method was used for monitoring the pressure variation in a solids separation membrane at different operating conditions. A submerged membrane bioreactor pilot plant, used during the short-term tests, was used to purify actual restaurant wastewater. The influence of membrane backwash and relaxation on the variation of pressure ...

Evaluation of household drinking water filter distribution programs in Haiti

by IWA Publishing  (Feb. 6, 2016)

Household water treatment (HWT) can reduce the diarrheal disease burden in populations without access to safe water. We evaluated five programs that distributed biosand, ceramic, or Sawyer filters in Haiti after the 2010 earthquake and cholera outbreak. We conducted household surveys and tested Escherichia coli and turbidity in stored ...

Dual layer hollow fiber PVDF ultra-filtration membranes containing Ag nano-particle loaded zeolite with longer term anti-bacterial capacity in salt water

by IWA Publishing  (Feb. 5, 2016)

Dual layer polyvinylidene fluoride (PVDF), antibacterial, hollow fiber, ultra-filtration composite membranes with antibacterial particles (silver (Ag) nano-particles loaded zeolite (Z-Ag)) in the outer layer were prepared with high water flux and desired pore sizes. The amounts of Ag+ released from the composite membranes, freshly made and ...

Surveillance of the chemical and microbial quality of drinking water for safe water supply in an urban area

by IWA Publishing  (Jan. 29, 2016)

To ascertain the quality of drinking water, surveillance of drinking water quality was conducted in Bhopal. The water supply to water treatment plants (WTPs) is from Kolar dam and Upper Lake. There was no significant change in water quality at the Kolar WTP on a day-to-day basis except in summer, when the manganese content of raw water was ...

Performance assessment of modified biosand filter with an extra disinfection layer

by IWA Publishing  (Jan. 29, 2016)

Biosand filters (BSFs) have been used widely as an efficient, inexpensive, and appropriate point-of-use technology. Several organizations are promoting filters without adequate testing, which may not lead to sufficiently safe devices. The objective of this study was to evaluate the performance of a modified biosand filter (MBSF) with an extra ...

The role of backwash in start-up of full-scale drinking water biofilters

by IWA Publishing  (Jan. 29, 2016)

The purpose of backwashing during the start-up period of rapid biofilters at drinking water treatment plants differs significantly from the purpose of backwashing during normal operation. During start-up, finished water quality is secondary, detachment of microorganisms must be minimized, dust present in the original filter media must be ...

Treatment of petrochemical secondary effluent by an up-flow biological aerated filter (BAF)

by IWA Publishing  (Jan. 28, 2016)

In this study, petrochemical secondary effluent was treated by a 55 cm diameter pilot-scale biological aerated filter (BAF) with a media depth of 220 cm. Volcanic rock grains were filled as the BAF media. Median removal efficiency of chemical oxygen demand (COD) and ammonia nitrogen (NH3-N) was 29.35 and 57.98%, respectively. Moreover, the ...

Structure changes and water filtration properties of electrospun polyamide nanofibre membranes

by IWA Publishing  (Jan. 25, 2016)

Nanofibre membranes are studied extensively in water treatment. Inappropriate storage, however, could alter their performance, e.g. regarding water filtration. This shows the need for investigating this effect in more detail so as to offer a solution for long-term behaviour and stability. In this study, polyamide nanofibre membranes were ...

Effects of ozonation and biological filtration on the formation of nitrogenous disinfection byproducts during chloramination

by IWA Publishing  (Jan. 20, 2016)

This study investigates the formation potential (FP) of nitrogenous disinfection byproducts and haloacetic acids (HAAs) during ozonation and biofiltration. Ozonation of raw waters was performed in batches with 1 mg O3/mg dissolved organic carbon (DOC). The ozonized waters were subsequently passed through a biofilter with 25 minutes of empty ...

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