Which bioremediation method is best suited for remediating soil contaminated with petroleum products?
Which bioremediation method is best suited for remediating soil contaminated with petroleum products?
Biostimulation
Biostimulation is one of the main strategy bioremediation for the decontamination of petroleum-polluted soil, which through adjusting the environmental conditions (temperature, moisture, pH, redox potential, aeration, mineral nutrition) to enhance the growth and the metabolic activity of indigenous degrading microbial …
How do you treat hydrocarbon contaminated soil?
The conventional methods used in remediating petroleum hydrocarbons contaminated soil are broadly divided into physical, chemical and biological methods [2, 3] but the most common conventional method for the remediating of contaminated soil is excavation followed by land filling or incineration [4], due to limitations …
What is hydrocarbon bioremediation?
Hydrocarbons are compounds made up of carbon and hydrogen. The process of bioremediation by microorganisms those that break down hydrocarbons can be used to purge the environment of these persistent pollutant particles. Not only microorganisms but plants too help in bioremediation (phytoremediation).
What are the 2 different types of bioremediation?
What are the Different Types of Bioremediation?
- Microbial bioremediation uses microorganisms to break down contaminants by using them as a food source.
- Phytoremediation uses plants to bind, extract, and clean up pollutants such as pesticides, petroleum hydrocarbons, metals, and chlorinated solvents.
What are the two possible sources of hydrocarbons in soil?
Crude oil and natural gas are the two largest sources of hydrocarbon contamination of soil.
How is contaminated soil treated?
According to the EPA, “Treatment approaches can include: flushing contaminants out of the soil using water, chemical solvents, or air; destroying the contaminants by incineration; encouraging natural organisms in the soil to break them down; or adding material to the soil to encapsulate the contaminants and prevent …
What are the two key points of hydrocarbon degradation?
Temperature and oxygen and nutrient concentrations are important variables in both types of environments. Salinity and pressure may also affect biodegradation rates in some aquatic environments, and moisture and pH may limit biodegradation in soils. Hydrocarbons are degraded primarily by bacteria and fungi.
Can bioremediation be harmful?
The bioremediation process creates relatively few harmful byproducts (mainly due to the fact that contaminants and pollutants are converted into water and harmless gases like carbon dioxide). Finally, bioremediation is cheaper than most cleanup methods because it does not require substantial equipment or labor.
What contaminants can be treated with bioremediation?
Contaminants treated using bioremediation include oil and other petroleum products, solvents, and pesticides. How Does It Work? Some types of microbes eat and digest contaminants, usually changing them into small amounts of water and harmless gases like carbon dioxide and ethene.
How is bioremediation used to remediate petroleum contaminated soil?
The process of bioaugmentation, as it applies to remediation of petroleum hydrocarbon contaminated soil, involves the introduction of microorganisms that have been cultured to degrade various chains of hydrocarbons into a contaminated system.
How is bioventing used for Petroleum Remediation?
Bioventing has been used for remediation of petroleum hydrocarbon contaminated soil. In a study demonstrated by Agarry and Latinwo (2015), bioventing was conducted on diesel oil contaminated soil amended with brewery effluents as organic agent over 28 days period and achieved a removal efficiency of 91.5%.
What are the bioremediation characteristics of hydrocarbon degradation?
2.1. Soil for the microcosm study Main characteristics Values TPH a (mg kg −1) 20200 ± 170 Alkane (mg kg −1) 15400 ± 130 Aromatics (mg kg −1) 2180 ± 20 pH 8.4 ± 0.3
How does microbial ecology affect the remediation of petroleum?
However, little research has been conducted on the effects of microbial ecology on the remediation of petroleum hydrocarbons, and how the bacterial and fungal communities associate with TPH degradation.