Articles
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Mop Water Treatability
The samples were tested at our facility on Thursday, March 20, 2003. Visually the samples were a homogeneous mixture of mop water, oil, and metals. The initial pH was 10.5 and the conductivity was 7,500 μS.The sample was ozonated at a setting of 35% of capacity (35% of 3.9 gm/hour) or 1.37 gm/hour in the stabilization column for 12 hours. There appeared to be very little separation of oils ...
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Pipeline integrity rule
Historically, transportation of oil and gas by pipelines remains the safest and most economical mode compared to other modes. However, pipeline integrity does cause a concern to the public and environment along the pipeline route because of its ever presence at the location for its entire useful life. U.S. pipeline failure incidents in the late ’90s accelerated the process of mandating pipeline ...
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Classification of contaminants and treatability evaluation of domestic wastewater
Long-term sampling and analysis were conducted in a domestic wastewater treatment plant for the investigation on the characteristics of the representative contaminants in raw sewage such as SS, COD, BOD5, TP, and TN. All these constituents were classified into dissolved and suspended groups by using a 0.45-μm membrane filter, and the concentration of each constituent in each group was ...
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Numerical modelling of the environmental impact of landfill leachate leakage on groundwater quality – a field application
Waste disposal facilities are mainly responsible for the gradual quality degradation of subsurface freshwater reservoirs. The main objective of this work is to identify the groundwater contamination risk due to potential leachate leakage and seepage beneath the municipal landfill of the City of Patras in Greece. A groundwater and leachate mass transport model of the underlying aquifer was ...
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Talking Trash
In 1976, Brent Sebright and his colleague, Lee Murray, formed a small operation in Hopkins Michigan installing trash compacting equipment manufactured by another company. By 1980, the manufacturer was experiencing financialtroubles, and its largest customer, Brask Enterprises, a trash compactor rental company, had become dissatisfied. “We got a phone call from the president of Brask Enterprises ...
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Influence of some meteorological parameters and forest fires on PM10 concentrations in a southwest zone of Mexico Valley
The relationship between PM10 concentrations and some meteorological parameters was analysed. Sampling was made from January (1998) to June (2001) in the campus of the National Autonomous University of Mexico (UNAM) at the southwestern part of the Mexico Valley. Year 1998 had extensive forest fires. A linear multivariate model was constructed. The model's adequacy to extrapolate daily average ...
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The right to work versus the right to income
Since the mid-1970s, restrictive monetary and fiscal policy have led to persistently high unemployment and rising underemployment in Australia. This paper compares two policy responses to income insecurity resulting from these trends, in the form of a universal Basic Income (BI) and a state-provided Job Guarantee (JG). The paper examines how the problem of income insecurity is constructed in each ...
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EPA’s proposal to revise the air quality standards for ground-level ozone
OnJune 20, 2007, the U.S. Environmental Protection Agency (EPA) proposed to strengthen the nation’s air quality standards for ground-level ozone. Recent scientific literature has improved our understanding of the adverse effects of ozone on both human health and the environment. This article summarizes the latest scientific knowledge on the effects of ozone and the key aspects of EPA’s proposal ...
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A triple bottom line opportunity for our cities
The triple bottom line for capital project delivery means the integration of financial, environmental and social objectives for a sustainable outcome. We’re talking about the very core of how a private sector company conducts its own business and how it works with its client to find a balance of solutions to their capital project delivery, financing and ongoing operations. This represents a ...
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ESFR Sprinkler Protection of Class II Commodity in Cold Storage Warehouses using Propylene Glycol Antifreeze Agent
Currently, the NFPA standard for the installation of sprinkler systems (NFPA 13) requires that early suppression fast response (ESFR) sprinklers be specifically listed for use with antifreeze mixtures due to the concern that antifreeze will contribute to the combustion energy of the fire. The effectiveness of an ESFR sprinkler system in suppressing a fire depends on the antifreeze concentration, ...
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Playing Dirty: Analysis of hazardous chemicals and materials in games consoles
The use of hazardous chemicals and materials in electronic products is widespread. Despite some recent improvements – a result of a combination of legal restrictions in some parts of the world, and voluntary action by companies – many devices still contain a variety of hazardous substances. These include chemicals which fall outside current legislative controls, as highlighted in recent studies ...
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NASA national aviation operations monitoring service advisory
In a memorandum dated Nov. 19, 2007, the NASA administrator directed the chief of the Office of Safety and Mission Assurance to lead an effort to release as much NAOMS survey information as possible by the end of 2007. This effort is referred to as Phase 1 of the NAOMS information release. The tasking was executed on Dec. 31, 2007, with the posting of NAOMS information on the NASA website. Phase ...
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A guide for multi-cultural community groups
No one knows your community better than you do. As a community-based organization, community leader or activist, you are in a unique position to take the lead in raising awareness about resource conservation, good solid waste management, and safeguarding the environment for future generations. Did you know that: Over 230 million tons of garbage are produced annually in the United States—that ...
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Bridging the gap between EH&S and technology
“IT Insight” is a new bimonthly column that will look at the wide world of information technology, with a focus on emerging tools and technologies for managing environmental, health, and safety data. Today’s environmental professional is faced with the challenge of sustaining an efficient and cost-effectiveenvironmental, health, and safety (EH&S) management process in an economy dominated by ...
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Pour plates or streak plates?
The pour plate method of counting bacteria is more precise than the streak plate method, but, on the average, it will give a lower ...
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Influence of shifting positions of ser, thr, and cys residues in prenisin on the efficiency of modification reactions and on the antimicrobial activities of the modified prepeptides
Since the recent discovery that the nisin modification and transport machinery can be used to produce and modify peptides unrelated to nisin, specific questions arose concerning the specificity of the modification enzymes involved and the limits of their promiscuity with respect to the dehydration and cyclization processes. The nisin leader peptide has been postulated to fulfill a recognition and ...
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Hydraulic conductivity of compacted clay liners permeated with inorganic salt solutions
Due to their low permeability, geosynthetic clay liners (GCLs) and compacted clay liners (CCLs) are the main materials used in waste disposal landfills. The hydraulic conductivity of GCLs and CCLs is closely related to the chemistry of the permeant fluid. In this study, the effect on the hydraulic conductivity of clays of five different inorganic salt solutions as permeant fluid was ...
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Using pipeline integrity rule for pipeline inspections
Historically, transportation of oil and gas by pipelines remains the safest and most economical mode compared with other modes. However, pipeline integrity does cause a concern to the public and environment along the pipeline route because it is ever present at the location for its useful life. U.S. pipeline failure incidents in the late ’90s accelerated the process of mandating pipeline ...
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Unit pricing of household garbage in Melbourne: improving welfare, reducing garbage, or neither?
Charging for household garbage collection per unit of waste is becoming more popular. Discussions in the practical literature focus on unit pricing as a way to encourage diversion to recycling and reduction in waste, but the economics literature emphasizes welfare maximization through charging at the marginal social cost. In the present study unit pricing was examined from both perspectives ...
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Door Manufacturer Treatability
Integrated Engineers conducted a treatability test that showed the Floccin K worked extremely well at a dosage of 3 grams/1,000 ml of wastewater (treatment dosage of 25 lbs. of Floccin-K to 1,000 gallons of wastewater) with the addition of 0.5 ml of 20% diluted caustic. The treated pH was 7.0. The floc formed was good and the water clarity is ...
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