respirator Articles
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Effects of meteorological parameters on RSPM concentration in urban Delhi
The adverse effect of Respirable Suspended Particulate Matter (RSPM) has become a well-recognised problem in environmental science. Dispersion and dilution of air pollutants are strongly influenced by meteorological parameters, namely wind, turbulence, and atmospheric stability. The analysis of Delhi's air quality data shows that winter is the most critical season with respect to the ...
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Evaluation of Respiratory Symptoms and Their Possible Association with Residential Indoor Bioaerosol Concentrations and Other Environmental Influences
The study discussed here evaluated the presence of self-reported respiratory symptoms and their association with indoor bioaerosol concentrations over a year-long study in the El Paso, Texas, region. The authors collected air samples from homes to assess seasonal differences in bacterial and fungal bioaerosol concentrations. They distributed a health questionnaire to the participating homeowner ...
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Microbiology: The Key to Wastewater treatment case study
The biological treatment of wastewater relies mainly on a consortium of heterotrophic and autotrophic bacteria. The fecal bacteria that are constantly introduced into the collection system are not the optimal bacteria for degrading the contaminants present in wastewaters. The soil bacteria that are introduced through inflow and infiltration are more effective at degrading the wastes and can ...
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Modelling ammonium-oxidizing population shifts in a biofilm reactor
The dynamic reactor behaviour of a nitrifying inverse turbulent bed reactor, operated at varying loading rate, was described with a one-dimensional two-step nitrification biofilm model. In contrast with conventional biofilm models, this model includes the competition between two genetically different populations of ammonia-oxidizing bacteria (AOB), besides nitrite-oxidizing bacteria (NOB). ...
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Cyclic activated sludge technology
Cyclic activated sludge technology was selected for the Potsdam Wastewater Treatment Plant (90,000 p.e.). The cyclic activated sludge facility comprises four modules integrated into two circular basins. Construction was commenced in February 1998 with seeding of the plant for start up taking place in October 1998. Process performance has been met since Spring 1999 at 80-90 percent of design load. ...
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Most Frequent OSHA Citations for 2017
Fall Protection – Construction – 29CFR1926.501. Section 501 is just the basic fall protection requirement. The duty is to have fall protection at a construction site where there is an edge that is 6 feet above another surface. Roofing and roof construction seem to be the biggest problems. More fall protection provisions and more citations can be found in Sections 502 and 503. ...
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How PPE Makes Mining Industry Safe and Secure
Work-related health and safety has always remained a cause for concern among industry experts, managers and workers. Many industries like energy, construction, fishing and farming report high incidence of casualties. The potential hazards that miners face daily in their workplace are plenty. Many of these hazards have progressive consequences that are not realized until too late. The effects ...
By KWRS
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Transcriptional responses in Enchytraeus albidus (Oligochaeta): Comparison between cadmium and zinc exposure and linkage to reproduction effects
Metal ecotoxicity to soil organisms, for example, in enchytraeids (also known as potworms), has been addressed mainly by assessing effects on survival and reproduction, but very little is known about the underlying molecular mechanisms of responses. The main purpose of the present study was to assess and compare the transcriptional responses of Enchytraeus albidus to an essential (Zn) and a ...
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The role of respirometry in maximising aerobic treatment plant efficiency
Wastewater treatment plants are coming under increasing pressure to increase their efficiency of operation. There are two objectives in this. The first is to reduce the cost of treatment. The second is a response to new legislation aimed at reducing the carryover of toxic materials to receiving waters. In order to achieve this, it is necessary to focus on the pivotal role of bacterial respiration ...
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Getting back to work—Safely!!
We Can Help You Develop a Plan That is Safe and Effective to Re-Open Your Facility. Atlantic Environmental, Inc. has 42 years (1978-2020) in developing plans for worker health and safety. We follow CDC, OSHA, AIHA, and ASSP guidelines on re-opening following the COVID-19 Pandemic. We can tailor them to your specific facility(facilities). This includes, (but not limited to): General ...
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Quantifying bacterial biomass fixed onto biological activated carbon (PAC and GAC) used in drinking water treatment
Hybrid processes coupling the use of powder activated carbon (PAC) with membrane filtration for drinking water production are emerging as promising alternatives to conventional technologies due to their enhanced control of dissolved contaminants. The quantification of biomass colonizing PAC is crucial for modeling, designing control strategies and improving the overall performance of these ...
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Proactive Safety: Radius BZ1 and Ventis Pro working together - Case Study
Background The Occupational Safety and Health Administration (OSHA) in the United States provides a comprehensive publication entitled “Hydraulic Fracturing and Flowback Hazards Other than Respirable Silica.” It includes sections on hazards during transport, during mixing and injection, hazards during pressure pumping and flowback operation, and possible gas encounters. Many of the ...
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Sterilizing and Reusing N95 Respirators
Overview Personal protection equipment (“PPE”)includes the gloves, gowns, N95 respiratory masks, and other items required by doctors, nurses, andother healthcare personnelresponsible for treating patients, including those suffering from infectious diseases. As has become evident in the current COVID-19 emergency affecting the globe, during a crisis, these critical items may not ...
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4 ways to keep pest control technicians safe
Without the correct safety measures, pest control can be a dangerous job. The chemicals technicians use to eradicate pests can be harmful, causing skin irritation, headaches, dizziness, chest pain, blurred vision, and nausea. Long-term exposure to pesticides can lead to brain damage, respiratory tract disorders, skin conditions and organ failure. As a pest control business owner, you must do ...
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Is Hexavalent Chromium (Hex Chrome; Chrome VI) Found in Welding Fumes A Carcinogen?
Neither the chromium found in metal plating (like chrome trim on a can) nor the chrome found in medicines like chromium picolinate is in the hexavalent form and is not carcinogenic. In fact it has a positive value in our system by assisting in regulating blood sugar levels. The chrome found in the fumes formed by welding stainless steel and released into a welder’s breathing zone is in the ...
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OSHA increases fines for workplace safety and health citations
Consistent with OSHA’s Philosophy to increase enforcement activities, they have also increased fines associated with citations. In a memo dated April 22, 2010, OSHA’s Assistant Secretary David Michaels has increased penalties for violations of OSHA regulations. They suggest that fines for serious, repeat and willful violations will increase and the ability of negotiations to reduce ...
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Getting Back To Work—Safely!!
Posted by atlanticei If you need COVID-19 Recovery assistance discussed in this article, call us at 1-800-344-4414 or e-mail us at info@atlenv.com for details and a free estimate. Written By: Robert E. Sheriff, MS, CIH, CSP We Can Help You Develop a Plan That is Safe and Effective to Re-Open Your Facility. Atlantic Environmental, Inc. has 42 years (1978-2020) in developing plans for worker ...
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Is Hexavalent Chromium (Hex Chrome; Chrome VI) a carcinogen?
In 1990, the International Agency for Research on Cancer (IARC), an agency of the World Health Organization (WHO), published their findings on chromium and chromium compounds as carcinogens. Chromium may be isolated in any of three volume states: Chrome 0 or metallic chromium; Chrome III called “Chrome 3” or Chrome VI called “Chrome 6,” also called hexavalent chromium. ...
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Air Contaminant Control Ventilation for Controlling Worker Exposure
Local Exhaust Ventilation to Control Air Contaminants Local Exhaust Ventilation for reducing worker exposure is the best description of ventilation for the purpose of controlling air contaminants that may be released inside the building. The objective is to capture the containment before it reaches the operation and gets into the general air stream. As of 2017, Industrial Production has ...
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Respiratory protective equipment for wildland fires
A.L: What are the occupational risks that wildland firefighters are exposed to? S.P: Wildland firefighters have the same risks as a welder, because they are exposed to heavy metals, the same risks as a coroner, because they work with organic materials, perhaps with dead animals; They face the same dangers as a lumberjack from exposure to formaldehyde, or as a melter when it comes to heat stress. ...
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