scholarly journals COHERENT, PLUNGING WATER JETS FOR OIL SPILL CONTROL

1981 ◽  
Vol 1981 (1) ◽  
pp. 655-660
Author(s):  
J. H. Nash ◽  
M. G. Johnson
Keyword(s):  
Test Data ◽  
Environmental Protection Agency ◽  
Cost Effective ◽  
The United States ◽  
Effective Field ◽  
Water Jet ◽  
Inland Waterways ◽  
Water Jets ◽  
Environmental Test ◽  
Spill Control

ABSTRACT The United States Environmental Protection Agency (EPA) Oil and Hazardous Materials Simulated Environmental Test Tank (OHMSETT) has designed a wide variety of water jet applications for control of spilled oil. This latest study reveals the advantage of using a simple nozzle consisting of a standard pipe mounted to produce a coherent vertical jet of water downward. Examples are illustrated with test data for several cost effective, field erectable systems using standard available water pumps and hardware. One system uses a series of jets to converge a 4.5-meter wide, 1-millimeter thick slick to 0.6 meter wide by 8 millimeters thick, moving at 6 knots in waves. The report reviews experience and test data obtained With a small barge, weir-type skimmer, mounted on a diverting inflatable boom system. This can be used to simulate the new USCG-ZRV fast current skimmer, the Bennett advancing belt skimmer, the U.S. Navy offshore spill tests, and dock simulations with the OHMSETT main bridge. Advancing skimmers may use the water jet boom system for three reasons. First, it allows an encounter width wider than the skimmer. Next, it will cause a thin slick to become thicker, thereby possibly allowing the skimmer oil pickup techniques to be more efficient. A water jet system can be used to couple a boom-towed skimmer and prevent skirt losses at the skimmer entrance. Future experiments are planned to field test the water jets in fixed and mobile applications on inland waterways.

Coverage of Non-Metals in the ASME B31.3 Chemical Plant and Petroleum Refinery Piping Code

1992 ◽  
Vol 206 (1) ◽  
pp. 67-72
Author(s):  
W E Short II
Keyword(s):  
United States ◽  
Environmental Protection Agency ◽  
Petroleum Refinery ◽  
Cost Effective ◽  
The United States ◽  
Chemical Plant ◽  
Area Of Interest ◽  
Plastic Materials ◽  
Cost Effective Alternative ◽  
Dramatic Growth

The chemical and petrochemical industries have decades of experience in specifying metallic piping lined with non-metals as a cost effective alternative to high-priced alloy materials of construction for piping in corrosive service. Early on, application of plastic piping was essentially limited to atmospheric chemical sewage service and to above-ground vents and drains. However, applications and usage of plastic piping continue to increase as engineers become more confident in specifying plastic materials and mechanical contractors gain experience with their installation. Non-metallic materials are being developed that are not only corrosion resistant but also have increasingly higher pressure and temperature capabilities. Plastic double-containment piping has experienced tremendous growth for handling hazards and toxic fluids. In the United States, recent dramatic growth of plastic double-containment piping applications has been, to a large extent, for compliance with the Environmental Protection Agency (EPA) regulations of the 1976 Resource Conservation and Recovery Act (RCRA). Related EPA regulatory efforts were accelerated in 1988 by more stringent amendments to this legislation. Industry in the United States must comply with these EPA regulations by December 1998. Plastic piping and metallic piping lined with non-metals have been covered to some extent by the ASME B31.3 Chemical Plant and Petroleum Refinery Piping Code for several years. The distinctive requirements of non-metallic piping and piping lined with non-metals were incorporated into the 1980 edition as a separate Chapter VII, which is dedicated to this growing area of interest in piping. This paper provides an overview of the present coverage of non-metallic piping lined with non-metals in the ASME B31.3 Chemical Plant and Petroleum Refinery Piping Code (1). Some topics that warrant further investigation are presented as well.

A Compaction-Granulation Process Turns Municipal Sludge into a Valuable Fertilizer Component

1990 ◽  
Vol 22 (12) ◽  
pp. 239-247
Author(s):  
Philip Wolstenholme
Keyword(s):  
United States ◽  
Environmental Protection Agency ◽  
Cost Effective ◽  
The United States ◽  
West Germany ◽  
Municipal Sludge ◽  
Protection Agency ◽  
Digested Sludge ◽  
Granulation Process ◽  
Planning And Design

To prepare dried municipal sludge material for use by the fertilizer industry, Ocean County Utilities Authority, New Jersey needed a process to increase the size of their sludge particles to between 1 and 3 millimetres. Several processes were evaluated during the planning and design phases of the project. The most cost-effective and reliable process was pressure agglomeration by compaction with a roll press, followed by granulation and screening of the compacted material. This process was tested with a sample of the Authority's digested sludge, which had been dried in a laboratory-scale evaporator. Fullscale compaction and granulation test equipment was used at a laboratory in West Germany to confirm the feasibility of the process and to develop data for the design of the project. As a result of its “innovative” approach to sludge processing, the United States Environmental Protection Agency (EPA) qualified this $60 million project for special funding. The project is nearing construction completion and due to be commissioned in spring of 1990.

scholarly journals Degradation Mechanism of 2,4-Dichlorophenol by Fungi Isolated from Marine Invertebrates

2020 ◽  
Vol 21 (9) ◽  
pp. 3317
Author(s):  
Efstratios Nikolaivits ◽  
Andreas Agrafiotis ◽  
Eirini Baira ◽  
Géraldine Le Goff ◽  
Nikolaos Tsafantakis ◽  
...  
Keyword(s):  
Environmental Protection Agency ◽  
Marine Invertebrates ◽  
Degradation Mechanism ◽  
Cost Effective ◽  
The United States ◽  
Environmental Pollutant ◽  
Catechol Dioxygenase ◽  
Adverse Health Effects ◽  
Starting Compound ◽  
Catechol 1,2 Dioxygenase

2,4-Dichlorophenol (2,4-DCP) is a ubiquitous environmental pollutant categorized as a priority pollutant by the United States (US) Environmental Protection Agency, posing adverse health effects on humans and wildlife. Bioremediation is proposed as an eco-friendly, cost-effective alternative to traditional physicochemical remediation techniques. In the present study, fungal strains were isolated from marine invertebrates and tested for their ability to biotransform 2,4-DCP at a concentration of 1 mM. The most competent strains were studied further for the expression of catechol dioxygenase activities and the produced metabolites. One strain, identified as Tritirachium sp., expressed high levels of extracellular catechol 1,2-dioxygenase activity. The same strain also produced a dechlorinated cleavage product of the starting compound, indicating the assimilation of the xenobiotic by the fungus. This work also enriches the knowledge about the mechanisms employed by marine-derived fungi in order to defend themselves against chlorinated xenobiotics.

scholarly journals Monitoring and Modeling the Long-Term Rainfall-Runoff Response of the Jacob K. Javits Center Green Roof

Water ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 1494 ◽  
Author(s):  
Noura Abualfaraj ◽  
Joseph Cataldo ◽  
Yara Elborolosy ◽  
Daniel Fagan ◽  
Sloane Woerdeman ◽  
...  
Keyword(s):  
New York ◽  
Environmental Protection Agency ◽  
Green Roof ◽  
Substantial Reduction ◽  
Cost Effective ◽  
Green Roofs ◽  
The United States ◽  
Rainfall Runoff ◽  
Substrate Depth

Drainage from the 27,316-m2 Jacob K. Javits Convention Center (JJCC) green roof was investigated in the field to quantify the system’s long-term rainfall-runoff response. The JJCC hosts one of the largest extensive green roofs in the United States. Utilizing four years of rooftop monitoring data collected using a weather station, custom designed and built drainage systems, three Parshall flumes equipped with pressure transducers, and weighing lysimeters, this study quantified the 25.4-mm-deep green roof’s ability to decrease the volume and peak rate of runoff. With parameters derived from the site, the Environmental Protection Agency Stormwater Management Model (EPA-SWMM) predicted event total runoff volume and event peak runoff rates to within +10% to −20% and +25% to −15% of the observations, respectively. The analysis further indicated that approximately 55% of the cumulative precipitation that fell on the JJCC extensive green roof during the monitoring period (warm weather months, June 2014–November 2017) was captured and retained. The average percent retained on an event-basis was 77%, and average event runoff coefficient was 0.7, implying a substantial reduction in the volume and rate of runoff generated from the roof compared to the pre-green roof condition, when most, if not all, of the precipitated water would have immediately resulted in runoff. Our research suggests that, on average, 96% of rainfall events 6.35 mm or less were retained within the green roof, whereas 27% of the total event volume was retained for events greater than 12.7 mm in depth. A sensitivity analysis suggests if the substrate depth were increased, better stormwater capture performance would be achieved, but only up 127 mm, whereas increased precipitation coupled with warmer temperatures as a result of climate change could decrease the performance by up to 5%, regardless of substrate depth. An equivalency analysis suggested that even shallow green roofs can significantly reduce the required stormwater detention volume that New York City requires on new development. This particular green roof appears to be more than 18 times as cost-effective as a subsurface cistern would be for managing an equivalent volume of stormwater in Midtown Manhattan.

Solid Fuel to Natural Gas Conversions for Circulating Fluid Bed Boilers

2014 ◽  
Author(s):  
Bill Gurski ◽  
John Guarco ◽  
Nando Nunziante
Keyword(s):  
Natural Gas ◽  
Solid Fuel ◽  
Environmental Protection Agency ◽  
Circulating Fluidized Bed ◽  
Cost Effective ◽  
The United States ◽  
Gas Production ◽  
Industrial Facilities ◽  
Fluid Bed ◽  
Firing System

Recent discoveries of vast natural gas reserves in the United States have led to increased domestic natural gas production, resulting in lower prices. Utility and large industrial facilities are performing solid fuel conversions on their boilers to natural gas as a cost-effective and efficient fuel solution. Natural gas is not only economically beneficial but also environmentally efficient with cheaper prices and reduced SO2, NOx, and CO2 emissions. The Environmental Protection Agency (EPA) has recently released mandatory requirements that directly affect the cost effective operation of solid fuel boilers, resulting in natural gas becoming a more economically appealing choice of fuel for facility operators. As more facilities consider boiler fuel conversions, it is important to understand all facets of the conversion, from the thermal evaluation of the boiler, to the complete design, supply and installation of the new firing system. Zeeco will provide specific details and recommended practices from a recent Circulating Fluidized Bed (CFB) Boiler solid fuel conversion to natural gas application designed for 1.3 billion Btu/hr of heat input for the maximum continuous steam rating. The information will detail the boiler conversion from a solid fuel fluid bed to a 100% natural gas fired boiler design. Thermal performance results, design and supply of the complete new gas firing system, and installation conversion assistance for the boiler modifications and firing system installation details are also provided.

Investigation into the implementation of chloramination at Sedibeng Water

2003 ◽  
Vol 3 (1-2) ◽  
pp. 233-238
Author(s):  
N. Basson ◽  
D. Traut ◽  
G. Titus ◽  
C. vd Walt ◽  
J. Haarhoff
Keyword(s):  
Environmental Protection Agency ◽  
Distribution System ◽  
Cost Effective ◽  
The United States ◽  
Decay Rates ◽  
Alternative Means ◽  
Cost Effective Alternative ◽  
Low Levels ◽  
One Year

The Balkfontein and Virginia plants of Sedibeng Water, situated in the Free State Province of South Africa, treat water for potable purposes. Chlorine is used as disinfectant at both plants. Low levels of free chlorine measured in the water supplied from some reservoirs, logistics and costs, related to the application of chlorination at various points in the distribution system, were the main thrusts for an investigation into the use of chloramination as an alternative means of disinfection. The so-called contact time (CT)-approach from the United States Environmental Protection Agency was applied for the evaluation of disinfection efficiency. The distribution system was modelled by using a hydraulic computer system. Decay rates for both chlorine and monochloramine - a vital parameter for eventual determination of the amount of chlorine and ammonia to be dosed - were determined. The levels of disinfectant in the water at a specific location could be predicted by using the decay values. The main findings of this investigation are that chloramination is an attractive and cost-effective alternative for conventional chlorination for providing quality assurance to all. It is estimated that the capital layout will be recovered within one year of operation of the ammoniation system.

Increasing Regulations Result in Decreasing Operational Efficiency

1994 ◽  
Vol 29 (8) ◽  
pp. 149-152
Author(s):  
Charles W. Ganze ◽  
Richard L. Brown
Keyword(s):  
Cost Effectiveness ◽  
Environmental Protection Agency ◽  
Clean Water Act ◽  
Gulf Coast ◽  
Cost Effective ◽  
The United States ◽  
The State ◽  
Clean Water ◽  
Aquatic Life ◽  
Wastewater Disposal

In 1972, the Congress of the United States of America passed major legislation called the Clean Water Act, which required all wastewater discharges to meet minimal standards. The Clean Water Act promoted efficiency and cost effectiveness. The Gulf Coast Waste Disposal Authority was created in 1969 by the Legislature of the State of Texas to, among other things, own and operate wastewater disposal systems which would be protective of public health, “terrestrial and aquatic life, the operation of existing industries and the economic development of the state“. Since enactment of the Clean Water Act, other pieces of legislation, rulings by courts of law, and rules established by the U.S. Environmental Protection Agency have thwarted many efforts to operate efficient and cost-effective wastewater treatment facilities. This paper will discuss several of the laws and rules that have discouraged efficiency and cost effectiveness.

Scanning electron microscopy of asbestos-containing material where the asbestos fibers are considered locked in a binder

1993 ◽  
Vol 51 ◽  
pp. 472-473
Author(s):  
J. R. Millette ◽  
R. S. Brown
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Environmental Protection Agency ◽  
Building Materials ◽  
The United States ◽  
Protection Agency ◽  
Asbestos Fibers ◽  
Different Types ◽  
Binder Material ◽  
Scanning Electron

The United States Environmental Protection Agency (EPA) has labeled as “friable” those building materials that are likely to readily release fibers. Friable materials when dry, can easily be crumbled, pulverized, or reduced to powder using hand pressure. Other asbestos containing building materials (ACBM) where the asbestos fibers are in a matrix of cement or bituminous or resinous binders are considered non-friable. However, when subjected to sanding, grinding, cutting or other forms of abrasion, these non-friable materials are to be treated as friable asbestos material. There has been a hypothesis that all raw asbestos fibers are encapsulated in solvents and binders and are not released as individual fibers if the material is cut or abraded. Examination of a number of different types of non-friable materials under the SEM show that after cutting or abrasion, tuffs or bundles of fibers are evident on the surfaces of the materials. When these tuffs or bundles are examined, they are shown to contain asbestos fibers which are free from binder material. These free fibers may be released into the air upon further cutting or abrasion.

Municipal Wastewater Treatment Technology Transfer Activities of the United States Environmental Protection Agency

1989 ◽  
Vol 21 (6-7) ◽  
pp. 685-698
Author(s):  
J. J. Convery ◽  
J. F. Kreissl ◽  
A. D. Venosa ◽  
J. H. Bender ◽  
D. J. Lussier
Keyword(s):  
Technology Transfer ◽  
Environmental Protection ◽  
Case Studies ◽  
Environmental Protection Agency ◽  
The United States ◽  
Environmental Research ◽  
Outreach Program ◽  
Small Community ◽  
Protection Agency ◽  
Transfer Programs

Technology transfer is an important activity within the ll.S. Environmental Protection Agency. Specific technology transfer programs such as the activities of the Center for Environmental Research Information, the Innovative and Alternative Technology Program, as well as the Small Community Outreach Program are used to encourage the utilization of cost-effective municipal pollution control technology. Case studies of three technologies including a plant operations diagnostic/remediation methodology, alternative sewer technologies and ultraviolet disinfection are presented. These case studies are presented retrospectively in the context of a generalized concept of how technology flows from science to utilization which was developed in a study by Allen (1977). Additional insights from this study are presented on the information gathering characteristics of engineers and scientists which may be useful in designing technology transfer programs. The recognition of the need for a technology or a deficiency in current practice are important stimuli other than technology transfer for accelerating the utilization of new technology.

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