| |
Enhanced
Bioremediation: Infusion of dissolved
gases in an aquifer can significantly accelerate natural biodegradation for petroleum hydrocarbons, chlorinated solvents and other chemicals.
Although bioremediation is generally a slow process, taking a few
months to start to see results, it can be an effective and low cost
remediation strategy. Enhanced bioremediation can be used to treat
some source areas, and off-site migration even in low permeability materials.
This technology can also enhance existing pump and treat systems,
reducing remediation time significantly. EBS recommends gas infusion
technologies, a delivery method for electron acceptors, such as oxygen,
for aerobic systems. Different gases such as propane, butane, ethene,
methane or others can be used for anaerobic systems. The most successful
gas transfer device available is the iSOC. EBS is an iSOC representative
for northern California. For the iSOC web site containing case studies
and technical information, see www.isocinfo.com.
EBS performs biological and chemical laboratory bench tests as well
as microbial profiling. These pre-field activities are highly recommended
before starting any in-situ enhanced bioremediation program. A good hydrogeology primer is the USGS Basic Hydrogeology (Water-Supply Paper 2220 by Ralph Heath). For in-situ remediation of chlorinated solvents, the U.S. EPA document provides background information.
|
EBS and iSOC Products and Services
- EBS iSOC™ Support Products & Services Catalog (Adobe PDF-18 page catalog)
- Catalog includes regulators, tubing, and comments on operation,
- iSOC well supplies , security cabinets, and pressure alarms
- DO/ORP meters
- bioremediation feasibility studies and microcosm bench tests
|
| |
Laboratory Bench-Scale Services: Commonly overlooked, bench testing provides some of the most important site-specific information about the likelihood of success or failure of an in situ remediation project. EBS performed dozens of bench tests for in situ chemical oxidation (ISCO) (bench tests for Fenton's Reagent, permanganate, persulfate, ozone, and others), enhanced bioremediation (microbiological feasibility studies and microcosm studies) and metals stabilization for numerous consulting companies. These tests are a way to optimize reactant chemistry in the laboratory rather than in the field. In addition, EBS provides bench tests for process treatments for environmental equipment to verify successful results and proper designs.
In-Situ Chemical Oxidation (ISCO) Remediation: EBS designs and implements a variety of in situ chemical oxidation (ISCO) processes for soil and groundwater remediation. EBS uses the high-pressure injection of liquid or solid chemical oxidants such as the hydroxyl radical (Fenton's Reagent), hydrogen peroxide, persulfate, potassium, sodium and calcium permanganate, percarbonate, and persulfate to greatly accelerate the complete destruction of petroleum hydrocarbons, chlorinated solvents, MTBE, BTEX, PCBs, PCPs and other organic chemicals. Delivery pressures for liquid oxidants include well and filter gallery trenches (30 to 40 psi), moderate pressure injection rods (200 to 600 psi) to high pressure (3,000 to 5,000 psi) lances. Ozone, a gas, is also used for in-situ remediation in a variety of delivery systems. EBS installs the oxidants with proprietary injection and pumping technologies in specialized sparge points or treatment trenches. Ozone can be injected at low pressure (less than 15 psi) or higher line pressures (40 to 75 psi) for in situ applications. Safety design is an important element of any EBS injection project.
Ozone Treatment Packages: EBS has designed complete and competitive ozone packages for in-situ and surface treatment of water, including wells, well points, sparge points, and trenches. Installation is available nationwide. Please call for custom services (electronic controllers, other project requirements). With ozone compatible compressors, line pressures from the ozone unit to the sparge points can range from about 40 to 75 psi. Please note: the higher the line pressure, the lower the stability and concentration of the ozone being delivered to an aquifer or vadose zone. Safety design is an important element of any EBS injection project.
In-Situ
Metals Geochemical Fixation or Stabilization: EBS designs
and injects chemicals to immobilize toxic soluble metals such
as lead, arsenic, hexavalent chromium, cadmium, nickel and others
using geochemical fixation. The treated metals become insoluble
in the process, reducing the need for expensive excavation and
disposal. EBS uses calcium polysulfide, sodium metabisulfite and
ferrous sulfate in a proprietary jetting technology. Safety design is an important element of any EBS injection project.
Remediation
Equipment: EBS installs and distributes
a variety of groundwater and treatment water and soil remedial
equipment such as ozone generators, thermal oxidizers, oil water
separators, emulsion-splitting plants, evaporators, equipment
and chemical storage, sewer treatment discharge plants, car/truck
wash systems, industrial wash wastewater recycling systems, advanced
oxidation systems, fluidized bed bioreactors, and grease treatment
systems.
EBS works with small wineries (<30,000 cases per year) and larger ones who
are required to meet water treatment goals for waste water used in the wine
making process and equipment washing process. Until relatively recently,
this segment of industry has not seen much regulatory oversight, however,
water regulators are now focusing on wineries. This water typically has
3,000 to 5,000 mg/L biological oxygen demand (BOD). EBS has developed a
modular approach that is flexible for wineries as well as cost effective for
discharge to land through irrigation or discharge to a sanitary sewer.
Typical waste discharge requirements for discharges of winery waste are
available in the link below.
Remediation
Seminars and Workshops: EBS provides
one to two day seminars and workshops on designing in-situ remediation
programs. Discussion on in-situ delivery methods, chemical oxidation
chemistry, enhanced bioremediation (aerobic and anaerobic), and
metals stabilization. The lectures are given by James Jacobs, Chief
Hydrogeologist and Fulbright award winner. See Environmental Education
Enterprises; website: www.e3power.com.
Accelerated
Surfactant Technology: EBS uses
environmentally friendly, naturally occurring surfactants for
acceleration of in-situ remediation of free product (both hydrocarbon
and chlorinated solvents). By generating micro-droplets, the free
product is broken down from one large liquid area into billions
of micro-droplets. This transformation increases in surface area,
allowing for more rapid degradation by both chemical oxidation
and enhanced bioremediation. EBS is a manufacturer's representative
for a variety of specialized remediation surfactants.
Air Toxins:
Mold, Viruses and Fungi: EBS has assessed and sampled for molds, viruses and fungi at numerous propertiesi. EBS designs and provides
ozone/UV systems to destroy molds, viruses and fungi in walls,
crawl spaces, ducts and other confined spaces. Depending on residence
time or treatment dose, the SARS virus and anthrax can be destroyed
using these technologies. In addition, EBS has equipment for industrial,
commercial and residential uses that continues to remove air toxins. These state-of-the-art technologies continue
to reduce the potential for recurring sick building syndrome by
removing odors, air pollutants, mold, viruses and bacteria, once
the original air pollutant sources have been removed. These products
offer protection of employees and family members.
|
