H. Scolnicov Articles | Environmental XPRT

Re-Opening Water Systems Safely After COVID Shut-Downs

Depending on your situation, your facility may have been shut down for weeks or even months due to COVID-19. During the shutdown, it’s likely that water sat stagnant in various places throughout your facility. Just a few days of stagnant water sitting in your pipes or cooling tower are enough for certain pathogens to start growing. By ten days of stagnation, steps need to be taken to ensure ...

Jul. 29, 2020

By H-O-H Water Technology, Inc.

Safe Handling of Industrial Water Systems Chemicals

Many facilities handle chemical treatment without the expertise and support of a water treatment partner. This puts a tremendous amount of responsibility on building managers and facility teams to receive, store, dispense and manage water systems chemicals safely. Under normal circumstances, this is difficult work. But what happens when something goes wrong, such as a spill? Do you have a ...

Apr. 7, 2020

By H-O-H Water Technology, Inc.

Winterizing your Cooling Tower: Clean or Disinfect?

Fall is a busy season for our water quality engineers. They’re helping facility managers prepare open-loop water systems for winter and low-flow season. Part of those winter preparations involves a thorough cooling tower cleaning or disinfection. Read on to learn why that’s important, as well as what to expect. Why Clean Or Disinfect Your Cooling Tower? Like all of the equipment in ...

Nov. 2, 2020

By H-O-H Water Technology, Inc.

How to Stop Wastewater Problems at the Plant Level

Facility managers often face the daily challenge of pushing aging wastewater treatment equipment to its limits. In many cases, they’re dealing with a mature infrastructure, operating decades-old equipment nearing the end of its useful life. At the same time, they struggle to stay on top of ever-changing government regulations and technology that grows increasingly complex. To stay ahead of ...

Aug. 30, 2020

By H-O-H Water Technology, Inc.

Are you Flushing Money Down your Cooling Tower?

When it’s up and running properly, your cooling tower is the quiet workhorse and unsung hero of your water system. But neglecting regular inspections, cleaning, and maintenance can lead to hundreds of thousands of dollars down the drain. Here’s how to keep it running at optimum levels of efficiency and performance – both for cost savings and for the environment. Limited Margin ...

Aug. 4, 2020

By H-O-H Water Technology, Inc.

Preparing Industrial Cooling Systems for Winter

Delaying or ignoring proper winterization for your cooling systems can cause a host of problems including unsafe work conditions, broken equipment, higher energy bills, and even code violations. Your cooling system needs specific care before shutdown or lay-up. First let’s look at how winter messes with your system. Winter Threats to Cooling Systems Without proper shutdown, your equipment ...

Sep. 24, 2018

By H-O-H Water Technology, Inc.

Cyst-Based Toxicity Tests. - VII. Evaluation of the 1-h Enzymatic Inhibition Test (Fluotox) with Artemia nauplii

Abstract : The newly developed 1 h enzymatic inhibition bioassay (Fluotox) was applied to toxicity testing with the larvae of the brine shrimp Artemia. The method consists of visual observation of in vivo inhibition of an enzymatic process using a fluorigenic enzyme substrate. The 1 h Fluotox test and the conventional 24 h and 48 h LC50 toxicity tests were conducted in parallel on 8 different ...

Jan. 7, 2020

By Microbiotests Inc.

H-beam pile extractor manufacturer

What is the type of H-beam steel pile? H-beam steel pile is along the retaining position pre-into the rail, I-beam or H-beam, spacing 1.0 ~ 1.5m, and then drilling, while the 3 ~ 6cm thick plate into the steel Between the retaining baffle, between the horizontal baffle and the steel into the wedge, so that the horizontal plate in close contact with the soil. H-beam Steel piles are mainly used for ...

Jun. 19, 2018

By lydite trading company

H-beam pile extractor manufacturer

What is the type of H-beam steel pile? H-beam steel pile is along the retaining position pre-into the rail, I-beam or H-beam, spacing 1.0 ~ 1.5m, and then drilling, while the 3 ~ 6cm thick plate into the steel Between the retaining baffle, between the horizontal baffle and the steel into the wedge, so that the horizontal plate in close contact with the soil. H-beam Steel piles are mainly used ...

Jun. 21, 2018

By Wuxi BeiYi Excavator Parts Factory

Alteration in Pimephales promelas mucus production after exposure to nanosilver or silver nitrate

The fish gill's ability to produce mucus effectively is a critical part of the stress response and protection against xenobiotic toxicity. Adult fathead minnows were exposed to silver nitrate (0.82 µg/L or 13.2 µg/L), polyvinylpyrrolidone‐coated silver nanoparticles (11.1 µg/L or 208 µg/L), and citrate‐coated silver nanoparticles (10.1 µg/L or 175 µg/L) for 96 h. Mucus concentrations based on ...

Oct. 27, 2014

By John Wiley & Sons, Ltd.

Effect of cycle period and substrate composition on phosphorous removal potential of a laboratory-scale sequencing batch reactor

The performance of a laboratory-scale sequencing batch reactor (SBR) of 20-litre capacity was evaluated for simultaneous removal of soluble COD (SCOD), NH4+?N and phosphorus by changing the compositions and concentrations of substrates under different combinations of REACT period. The total cycle period of 10 h comprised 0.5 h FILL period, 8 h REACT period, 1 h SETTLE period and 0.5 h IDLE/DRAW ...

Mar. 30, 2011

By Inderscience Publishers

Photoinactivation of Staphylococcus aureus and Vibrio parahaemolyticus in the model aquatic microcosm: effect of light intensity and dissolved biodegradable organic compound

The impact of light (1,000 × 100,000 lx) on the inactivation of S. aureus and V. parahaemolyticus has been assessed under different concentrations of dissolved biodegradable organic compound (BOC) at pH 7.0. First, a gradual decrease in the number of cultivable cells was observed. Secondly, a cell reactivation was observed and it was marked in the absence of BOC. In the absence of BOC, the lowest ...

Oct. 1, 2010

By IWA Publishing

Natural radiation level in the environment of Tehri Garhwal, Uttaranchal

The natural radiation levels were measured in about 50 residential houses of Tehri Garhwal, Uttaranchal, using an environmental radiation dosimeter in both the indoor and the outdoor atmosphere. The total gamma ray activity was found to vary from 29.74 µR/h to 41.19 µR/h with a mean of 36.5 µR/h for the indoor environment, whereas for outdoors it varied from 28.76 µR/h to 43.46 µR/h with a mean ...

Jan. 5, 2005

By Inderscience Publishers

Isolation of high-salinity-tolerant bacterial strains, Enterobacter sp., Serratia sp., Yersinia sp., for nitrification and aerobic denitrification under cyanogenic conditions

Cyanides (CN−) and soluble salts could potentially inhibit biological processes in wastewater treatment plants (WWTPs), such as nitrification and denitrification. Cyanide in wastewater can alter metabolic functions of microbial populations in WWTPs, thus significantly inhibiting nitrifier and denitrifier metabolic processes, rendering the water treatment processes ineffective. In this study, ...

Feb. 5, 2016

By IWA Publishing

High frequency of Helicobacter pylori DNA in drinking water in Kermanshah, Iran, during June–November 2012

To gain a better understanding of transmission and selecting appropriate measures for preventing the spread of Helicobacter pylori, the aim of this study was to investigate the prevalence of H. pylori in drinking water samples in Kermanshah, Iran. Drinking water samples were collected from around Kermanshah and filtered through 0.45 μm nitrocellulose filters. The bacterial sediment was ...

Sep. 25, 2014

By IWA Publishing

A H Harris Construction Supply, Chicopee, MA - Case Study

Project Name: A H Harris and Sons, Construction Supply Products: Gravelpave2 Permeable Paver Applications: Parking lot City: Chicopee State/Province: Massachusetts Install Date: Spring 2003 Client: A H Harris and Sons Construction Supply Install Size: 300 m2 (3000 sq ft) Address: 232 Meadows St, Chicopee, MA Designer: A H Harris and Sons Contractor: Marion Excavation ...

Oct. 2, 2012

By Invisible Structures, Inc.

Survival of Helicobacter pylori in the wastewater treatment process and the receiving river in Michigan, USA

Contaminated water may play a key role in the transmission of Helicobacter pylori, resulting in gastrointestinal diseases in humans. The wastewater treatment process is an important barrier to control the transmission of H. pylori. However, the presence and viability of H. pylori in the treatment process is not well known. In this paper, the real colony morphology of H. pylori was confirmed ...

Feb. 22, 2016

By IWA Publishing

PCR assay targeting virulence genes of <italic>Helicobacter pylori</italic> isolated from drinking water and clinical samples in Lahore metropolitan, Pakistan

PCR assay targeting virulence genes of Helicobacter pylori isolated from drinking water and clinical samples in Lahore metropolitan, Pakistan

Helicobacter pylorus is considered for chronic gastritis, gastric ulcers and adenocarcinoma and its high infection rate is observed in overcrowded and lower socioeconomic groups in developing countries. This study was designed to identify the role of drinking water in the transmission and prevalence of H. pylori (HP). Selective HP medium was developed for enrichment and presumptive identification ...

Mar. 1, 2011

By IWA Publishing

Performance measurement of a twisted three-bladed airfoil-shaped H-rotor

In the present study, performance of a twisted three-bladed airfoilshaped H-rotor was measured experimentally for different values of chord Reynolds number of flow and ratios of height-to-diameter (H/D). The rotor was 20 cm in height (H) and 5 cm in chord with about 26° twist at the trailing end. Tests were conducted in an open circuit subsonic wind tunnel for ten H/D ratios, namely 0.85, ...

Mar. 16, 2010

By Inderscience Publishers

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