Case Studies in Environmental Remediation
Lipari Landfill (New Jersey)
Lipari Landfill (New Jersey) was plagued
by oxidizer maintenance and performance problems. The efficiency
of their five year old SVE/oxidation system had dropped by
50%. Lapari Landfill wanted to repair their current system,
train operations staff and maintain their equipment on an
ongoing basis.
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Intellishare was able
to identify
each individual problem, ascertain root causes and
develop a solution based on sound engineering principles
and experience.
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In March of 2005, Intellishare Environmental was tasked
with repairing the system, improving performance efficiency
and devising a plan for ongoing maintenance. The Intellishare
project team worked closely with the Army Corp of Engineers,
EPA and
Sevenson Environmental Services to outline the goals of the
project, establish priorities and milestones and complete
the tasks required to return the system to on-line performance.
Intellishare was able to identify each individual problem,
ascertain root causes and develop a solution based on sound
engineering principles and experience.
Our initial site visit revealed an extensive list of items
requiring attention. Here are some of the problems we found:
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The oxidizer’s high efficiency heat exchanger
had been damaged beyond repair during a high temperature
event in 2004 and the replacement heat exchanger needed
to be protected.
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The vacuum extraction system was transferring excessive
amounts of water to the oxidizer.
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The burner needed adjustments and the instrumentation
needed to be inspected. Some instrumentation needed replacing.
Our first priority was to prevent repeat damage to the heat
exchanger, which had been replaced by the original equipment
provider. Because the Lipari oxidizer is treating chlorinated
contaminates, the operating temperature is between 1600 – 1750
degrees F as opposed to a traditional thermal oxidizer which
runs at 1400 degrees F. Intellishare designed a tertiary
air cooling system and reworked existing ductwork to minimize
thermal effects of the high temperature application on the
heat exchanger.
Our next task was to reduce the amount water the vacuum
extraction system was sending to the oxidizer. This was important
for two reasons. First, water injected into the oxidizer
carries through to the burner where superheated steam is
created. Steam puts additional stress on the heat exchanger
and increases the likelihood of repeat damage. The second
reason is oxidizer operating costs are reduced (less energy
is required for the oxidizer to reach operating temperatures)
when water transfer is eliminated. Intellishare replaced
the existing water removal system by using a primary ‘surge
tank’ in combination with a secondary vessel for mist
elimination. The surge tank was designed to fit in an existing
below grade vault and the vapor liquid separator was placed
above grade.
To maximize safety and operating performance, the instrumentation
for each part of the remediation system was tested to ensure
it was both functional and accurate.The Lipari Landfill instrumentation
and control system was complex and contained a large amount
of HMI/SCADA, allowing for on-site data collection with off-site
monitoring of operations.
Here’s a summary of the
solution Intellishare Environmental Inc. provided
for the Lipari Landfill site:
- Redesign and repair of existing thermal oxidizer, VLS & scrubber
- Design and construction of new water separation system
- Re-engineered cooling air injection system
- Redesign instrumentation and control system
- Staff operator training
- Long term maintenance agreement
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