Bioremediation Tactics

SKU: C-940Duration: 21 Minutes

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Language:  English

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Course Details


Training Time: 21 minutes

Compatibility: Desktop, Tablet, Phone

Based on: Industry Standards and Best Practices

Languages: English

Bioremediation refers to a set of processes which involve the use of living things to break down hazardous substances in the environment into less toxic or non-toxic substances and restore contaminated soil or water to its original unpolluted state. There are many methodologies which fall into the category of bioremediation. All involve living organisms. Some work by stimulating or enhancing the inclination of certain microorganisms to break down undesirable, polluting substances. Other methods involve the use of fungi or plants to achieve the same purpose.

Learning Objectives

  • Define the terms "bioremediation," "biostimulation," and "phytoremediation"
  • Explain the mechanism which underlies bioremediation
  • Describe the difference between "in situ" and "ex situ" remediation
  • Describe the advantage of in situ treatment
  • List some of the ex situ treatments
  • Describe the mechanism of mycroremediation
  • Describe some phytoremediation methods
  • List the limitations of phytoremediation

Key Questions

The following key questions are answered in this module:

What are some of the organisms that can be used for bioremediation?
Bioremediation refers most commonly to the use of microbes and bacteria to breakdown hazardous substances. In some situations fungi and plants can also be used for remediation.

What is biodegradation?
Biodegradation is the natural process of bacteria breaking down organic molecules into harmless substances such as carbon dioxide and water.

How can biodegradation be accelerated?
Even in the presence of an ample basic food supply, bacterial growth may be restricted by a deficit of other growth factors such as oxygen, phosphorus or potassium. The addition of these elements, or the modification of the growing environment, such as changing the temperature, can accelerate biodegradation.

What is the difference between in situ and ex situ bioremediation?
In situ bioremediation involves bringing the necessary elements for remediation together at the location of the hazardous material. If there is a spill into soil, the bacteria and stimulates are added so that remediation occurs in-place, in the soil. In ex-situ remediation, the contaminated material is collected and moved to a different location for treatment, and then returned.

What is phytoremediation?
Phytoremediation refers to the use of plants for bioremediation. There are several different ways that plants can be used for remediation of contaminated soil and groundwater.

Sample Video Transcript

Below is a transcript of the video sample provided for this module:

As they pull water from the ground, plants may also remove contaminants that are in the water. Some types of volatile contaminants will travel with water and transpire into the air with the water. This process is called "phytovolatilization." While this does not entirely eliminate the contaminant from the ecosystem, the groundwater and soil quality is improved by the process. In the process of "phytotransformation," contaminants are broken down by enzymes produced by the plant (similar to the mycelium enzymatic process) or by metabolic processes within the plant. Depending on the specific system, the plant may be able to use some of the broken down molecules to create plant tissue, or the plant may discharge modified forms of the contaminant through transpiration.

Additional Resources

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