AutoTracker™ (U.S. Patent Number 6,520,259) Floating Extraction Inlets were added to a DPE system at a remediation site in mid-Michigan following several years of operational problems caused by fluctuating water table levels. Installation was straightforward and system performance improved immediately, reducing on-site maintenance, labor and O&M costs and greatly improving groundwater recovery. Ongoing savings were so dramatic that payback for the initial capital cost was achieved in just 4 months! Projected over the project life cycle, cost savings should surpass $600,000, with an expected 10-year reduction in time to reach the remediation target.
Site Background Data:
12 well dual-phase extraction system
2-acre encapsulation and treatment cell
Well depths: 20-40 feet bgs; static water level: 15-20 feet bgs
Approx. 30,000 cubic yards of soils contaminated with chlorinated solvents
25 HP rotary lobe blower used
Each well extracts 20-30 scfm of vapor at 10-13' Hg
Recovered vapor & groundwater treated with vapor/liquid phase activated carbon
History Prior to AutoTracker Installation:
System operated 1999-2001 with fixed entrainment tubes
Water level changes caused by seasonal fluctuations and/or blower shutdown resulted in dry recovery, deadhead and liquid choking conditions
O&M costs increased by need for frequent manual adjustment and maintenance
Air/groundwater recovery rates decreased due to extensive system downtime
AutoTracker Performance:
Floating Extraction Inlets installed summer 2002
O&M costs reduced 20% due primarily to reduced labor
Payback period less than 4 months
Groundwater recovery rates nearly doubled
Groundwater recovery cost per gallon reduced 59%
Estimated project duration cut from 30 to 20 years
Overview
A major oil company was looking for a way to stay ahead of EPA regulations for soil vapor extraction of BTEX and the subsequent treatment of these gases. They were looking for one company that could offer competitive pricing, local support service, and the application expertise to provide 50 remediation units throughout the United States.
Solution
Global Technologies built a Model 7 Integrated Vapor Treatment Module (VTM) Remedi-CatTM. This modular system processes a maximum of 750 SCFM of VOC-laden...
Pacific Environmental Resources Corp. (PERC) is a water quality service provider offering clients a total solution in partnership with nature and the surrounding environment. PERC is a leading design / build / operate company in the wastewater industry. PERC’s total solution provides a scalable and modular design delivered under a single contractual agreement. Clients enjoy the benefits of a small footprint, accelerated schedule to startup, guaranteed capital cost, low operating costs and guaranteed...
PROJECT BACKGROUND
At a manufacturing site located in Cookeville, TN, on and offsite soil (tight clays) and groundwater contaminated with chlorinated solvents, were discovered as the result of a Phase I and a Phase II investigation. The client entered the State of Tennessee Voluntary Clean-up Oversight and Assistance Program (VCOAP), which resulted in an informal focused feasibility study to select a remedial alternative. Technologies reviewed included recirculating wells, barrier walls, chemical oxidation, and...
Cultures of Trichodesmium from the Northern and Southern Great Barrier Reef Lagoon (GBRL) have been established in enriched seawater and artificial seawater media. Some cultures have been maintained with active growth for over 6years. Actively growing cultures in an artificial seawater medium containing organic phosphorus (glycerophosphate) as the principal source of phosphorus have also been established. Key factors that contributed to the successful establishment of cultures were firstly, the seed samples were...
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ONE out of every four American households currently treat and release wastewater on their own property. Although most people assume that on-site systems are confined to rural areas, in fact half are in suburbs and a few even remain within the confines of large cities.
Public works engineers...
1.1 Scope and Objectives
A small number of viable options are presently available for the bleaching of wood pulp (delignification and brightening) during the manufacture of pulp and paper. The use of chlorine dioxide (ClO2) in the bleaching process has largely superceded the earlier use of Cl2, or elemental chlorine, in the majority of North American pulp mills: It was discovered over a decade ago that the previous widespread use of Cl2 contributed to the production and subsequent release to the environment of...
The Rockland County (New York) Cocomposting Facility began operations in February, 1999, processing biosolids from the five publicly owned treatment works (POTWs) in the county. The Rockland County Solid Waste Management Authority (RCSWMA) owns the facility, but contracted with Waste Management of New York to design, build and operate (DBO) the 110 wet tons/day agitated bin composting facility located in Hilburn. From the earliest stages of development,
RCSWMA has focused on odor control provisions for the...
Introduction:
In this process, vacuum extraction is used to remove contaminants from soils. After condensation, contaminants are mixed with a semiconductor catalyst such (e.g., titanium dioxide), and fed through a reactor which is illuminated by sunlight. Ultraviolet light activates the catalyst, which results in the formation of reactive chemicals known as `radicals`. These radicals are powerful oxidizers that break down the contaminants into non-toxic by-products such as carbon dioxide and water.
A big...
Issue: Renewable energy technologies are becoming more widespread in southern Mediterranean countries, thanks to developed countries’ cooperation programmes and international aid. However, it is still not clear what is the best way for programmes to meet real renewable energy needs. Relevance: The European Community Development Programme has begun to focus on the question of how it may develop after the year 2000. The outcome will depend particularly on two processes: the expiry of the Edinburgh principles on the...
Imagine being in charge of a chemical company. One day a fire breaks out, and an employee, designated as a first responder, is killed fighting the blaze. Then OSHA investigators discover that the man died primarily because both his training and his equipment were inadequate. This scenario is why CPL 2-2.59A should put anyone who runs a HAZMAT facility into a state of introspection. These employers need to ask themselves: `When was the last time that our Emergency Response Plan was brought up to date? Do our...
There are at least 100,000 tons of obsolete pesticide stockpiles in countries around the globe. Approximately 20,000 tons of these pesticides are located in Africa and the Middle East. While exact quantities are unknown, large stockpiles also exist in Eastern Europe and the Newly Independent States. Poland, for example, has 60,000 tons of obsolete pesticides stored in various locations throughout the country. In addition, in many countries unquantified amounts of soil and building materials have been heavily...
ABSTRACT
This technology status report provides a snapshot of the status of the in situ flushing remediation technology. The information provided herein is a reflection of the content of the Ground-Water Remediation Technologies Analysis Center’s (GWRTAC’s) case study database for innovative technologies. GWRTAC’s case study database is not represented as being comprehensive, nor are the case studies included screened to verify their validity, quality, or “success” in remediation. Rather the case study database...
Introduction:
Contaminated soil is screened, processed with a crusher and pug mill, and mixed with reagents. The mixture is heated in a reactor. The dehalogenation process is achieved by either the replacement of the halogen molecules or the decomposition and partial volatilization of the contaminants.
Base-catalyzed Decomposition (BCD)
Base-catalyzed decomposition (BCD) process was developed by EPA`s Risk Reduction Engineering Laboratory (RREL), in cooperation with the Naval Facilities Engineering Services...
Background
Since 1988, CarLovers Carwash Limited has operated a network of automatic and self-serve carwash facilities throughout Australia. CarLovers currently has 87 carwash outlets operating in Australia.
Pre-existing Process
Previous car wash facilities discharged all their wash water to sewer and did not reuse the wash water.
Cleaner Production Initiative
CarLovers is totally committed to ëcleaner productioní practises and each new site employs the latest technology to save on light and heat and...
Introduction
The utilization of fungal biodegradation involves the controlled usage of these specially cultivated fungi to treat contaminants.
White Rot Fungus
White rot fungus has been reported to degrade a wide variety of organopollutants because of its lignin-degrading or wood-rotting enzymes. Two different treatment configurations have been tested for white rot fungus, in situ and bioreactor. An aerobic system using moisturized air on wood chips is used in a reactor for biodegradation. A reactor was used...
Case Study
Name of company: Neumarkter LammsbräuSector: BreweryNumber of employees: 80Country: Germany
AbstractNeumarkter Lammsbräu is an 80-employee brewery located in Bavaria, a German region which has a strong tradition for beer. At the beginning of the 1970s, agriculture in the region became increasingly intensive. The quality of beer was being sacrificed for quick and high returns on sales. Neumarkter Lammsbräu wanted to safeguard the quality of its products and develop a strategy for success. The company...
Reuse/Recycle: Recovery and reuse technologies for energetic materials, including both explosives and propellants, should be considered at explosives waste sites for several reasons. First, new recovery methods and potential uses for reclaimed explosive materials are rapidly developing. Second, recovery/reuse options reduce overall remediation costs by eliminating destruction costs and allowing the value of reclaimed materials to be recovered. Finally, EPA`s treatment hierarchy, which is based on environmental...
It may be necessary to know other subsurface information to remediate nonhalogenated semivolatile organics in water. Treatability studies may be required to determine the contaminant biodegradability for any biodegradation technologies. Treatability studies are also necessary to ensure that the contaminated ground water can be treated effectively at the design flow. A subsurface geologic characterization would be particularly useful to any isolation or stabilization technologies. Ground water models are also...
Containment treatments are often performed to prevent, or significantly reduce, the migration of contaminants in soils or ground water. Containment is necessary whenever contaminated materials are to be buried or left in place at a site. In general, containment is performed when extensive subsurface contamination at a site precludes excavation and removal of wastes because of potential hazards, unrealistic cost, or lack of adequate treatment technologies.
Containment treatments offer quick installation times and...
The main advantage of in situ treatments is that they allow ground water to be treated without being brought to the surface, resulting in significant cost savings. In situ processes, however, generally require longer time periods, and there is less certainty about the uniformity of treatment because of the variability in aquifer characteristics and because the efficacy of the process is more difficult to verify.
Physical/chemical treatment uses the physical properties of the contaminants or the contaminated...
It may be necessary to know other subsurface information to remediate fuels in ground water. Treatability testing to characterize contaminant biodegradability and nutrient content may be needed for any biodegradation technology. A subsurface geologic characterization would be particularly important to characterize the migration of NAPLs. Recovery tests are usually necessary to design a product/ground water pumping scheme that will ensure that the nonaqueous fuel layer can be recovered and that contaminated ground...
Three technologies that are most commonly used to treat nonhalogenated VOCs in air emissions/off-gases are carbon adsorption, catalytic oxidation, and thermal oxidation.
Carbon adsorption is a remediation technology in which pollutants are removed from air by physical adsorption onto the carbon grain. Carbon is `activated` for this purpose by processing the carbon to create porous particles with a large internal surface area (300 to 2,500 square meters per gram of carbon) that attracts and adsorbs organic...
In-well vapor stripping technology involves the creation of a ground-water circulation pattern and simultaneous aeration within the stripping well to volatilize VOCs from the circulating ground-water. Air-lift pumping is used to lift ground-water and strip it of contaminants. Contaminated vapors may be drawn off for aboveground treatment or released to the vadose zone for biodegradation. Partially treated ground-water is forced out of the well into the vadose zone where it reinfiltrates to the water table....
Introduction
This document is a guide for water treatment engineers to better understand crossflow membrane applications for glycol-based aqueous solutions. It includes glycol applications we have sold equipment for, applications we have successfully tested, and applications we have not tested but are expected to be technically feasible.
Glycol-based solutions are commonly used by a number of industries. Glycol-based solutions are inexpensive, relatively easy to manufacture and modify, and have a number of...
Horizontal well technology has been incorporated into many current environmental remediation applications (and associated contaminants), such as in situ bioremediation, air sparging, vacuum extraction, soil flushing, free product recovery, etc. Ac cording to information reviewed, this technology is most applicable to sites with relatively shallow soil and/or groundwater contamination, and can potentially enhance remediation efforts at sites low hydraulic conductivities.
Types of horizontal wells include both...
Air sparging involves injecting a gas (usually air/oxygen) under pressure into the saturated zone to volatilize groundwater contaminants and to promote biodegradation in saturated and unsaturated soils by increasing subsurface oxygen concentrations. Vola tilized vapors migrate into the vadose zone where they are extracted via vacuum, generally by a soil vapor extraction system. The term biosparging is sometimes used interchangeably with air sparging to highlight the bioremediation aspect of the treatment process...
ABSTRACT
Bioslurping involves the simultaneous application of vacuum enhanced extraction/recovery, vapor extraction, and bioventing to address LNAPL contamination. Vacuum extraction/recovery is used to remove free product along with some groundwater, vapor extrac tion is used to remove high volatility vapors from the vadose zone, and bioventing is used to enhance aerobic biodegradation in the vadose zone and capillary fringe.
The bioslurping system is made up of a well into which an adjustable length `slurp...
What is chemical dehalogenation? Chemical dehalogenation is a chemical process to remove halogens (usually chlorine) from a chemical contaminant, rendering it less hazardous. Halogens are a class of chemical elements that include chlorine, bromine, iodine, and fluorine. Polychlorinated biphenyls are halogenated compounds that once were used in high voltage electrical transformers because they conducted heat well while being fire resistant and good electrical insulators. In addition, halogenated compounds are used...
The following article is based on a paper presented in August, 1990 at the 21st Annual Meeting of the Fine Particle Society in San Diego.
Soft drink manufacturers, not to mention manufacturers of other beverage products, have always had a keen interest in the water that goes into their products. After all, it is the water that typically makes up 80%-90% of the product.
In the past the water has been treated by a variety of methods, depending on the type of water supply and the type of drink being produced. Or,...
Untitled Document
Summary:
One of the leading treatment technologies for reduction of organic contaminants in groundwater has become the adsorption process utilizing granular activated carbon (GAC). This paper presents a methodology for selecting the proper adsorption system design. The use of the isotherm test for evaluation of carbon adsorption is discussed, with new data on adsorption of VOCs presented. The use of the dynamic column study for system design and its relationship to the...
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