Thermal NSZD

Thermal NSZD

Thermal NSZD: Continuous Remote Monitoring of Natural Source Zone Depletion (NSZD)

Thermal NSZD® is a continuous thermal monitoring system that is used to estimate the daily and cumulative mass of LNAPL destruction in the subsurface by microbial activity (Horst et al., 2017Sale et al., 2018; Kulkarni et al., 2020). The conversion of net temperature change to mass degradation is based upon a series of thermodynamic equations developed by Colorado State University (US Patent No. 10,094,719). Thermal NSZD® measures the heat generated by biodegradation processes using a vertical series of thermocouples, which can then be converted to a biodegradation rate. Temperatures are corrected from a non-impacted background location to remove seasonal temperature effects in the subsurface.

Advantages of Thermal NSZD include:

  • One-time field installation of remote monitoring system with minimal O&M, no site visits, no sampling, and no lab.
  • Daily temperature readings from vertical profiles of thermocouples.
  • Secured, read only access to site data for clients, regulators, and other interested parties (as determined by the client).

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Thermal NSZD
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The Thermal NSZD® technology (US Patent No. 10,094,719) measures the rate at which natural biodegradation destroys free-phase product (LNAPL) in the subsurface by measuring the heat released by the microbial reactions.
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SECTION 1: Thermal NSZD
TITLE: Thermal NSZD: Continuous Remote Monitoring of Natural Source Zone Depletion (NSZD)
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Thermal NSZD® is a continuous thermal monitoring system that is used to estimate the daily and cumulative mass of LNAPL destruction in the subsurface by microbial activity (Horst et al., 2017; Sale et al., 2018; Kulkarni et al., 2020). The conversion of net temperature change to mass degradation is based upon a series of thermodynamic equations developed by Colorado State University (US Patent No. 10,094,719). Thermal NSZD® measures the heat generated by biodegradation processes using a vertical series of thermocouples, which can then be converted to a biodegradation rate. Temperatures are corrected from a non-impacted background location to remove seasonal temperature effects in the subsurface.

Advantages of Thermal NSZD include:

  • One-time field installation of remote monitoring system with minimal O&M, no site visits, no sampling, and no lab.
  • Daily temperature readings from vertical profiles of thermocouples.
  • Secured, read only access to site data for clients, regulators, and other interested parties (as determined by the client).

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