Engineering, bioremediation processes

According to the vendor. Pintail Systems, Inc. s, bioremediation processes are less expensive than engineered technologies because the majority of the Pintail methods are in situ. For ex situ applications, the construction of bioreactors accounts for the greatest costs. The vendor claims that the following factors reduce costs compared to alternative technologies ... 

The commercially available bioremediation process occurs in an engineered land treatment cell or prepared bed. Contaminated soils and sludges are excavated and transported to the treatment ceU (or bed). Nutrients, water, and oxygen (introduced by tilling the soil) are added to the bed to accelerate the treatment process. After bioremediation is complete, the treatment cell is capped and the site is considered suitable for use. 

J. P. Gould, J. Bender, and P. Phillips, Bioremediation of Metal-contaminated Water with Microbial Mats, Pollution Prevention for Process Engineering, P. E. Richardson and B. J. Scheiner (eds.). Engineering Foundation, AIChE, New York, 1996a, pp. 175-182. 

Admassu W, Korus RA (1996) Engineering of bioremediation processes needs and limitations. In Crawford RL, Crawford DL (eds) Bioremediation principles and applications. Cambridge University Press, Cambridge, UK,... 

The IWA (International Water Association), formerly known as the IWQA, has had several task forces working on model development for various types of processes. I believe that these reactor models have a good potential application for remedial treatment. The subject of the models is extremely complex and too involved for this discussion, as it is a Master s Level course in Environmental Engineering. However, let me indicate that there are several types of models which may have some application to the bioremediation field. The principal models are... 

The engineered bioremediation system (EBS) is a proprietary process for the ex situ bioremediation of organic contaminated soils. The system is designed to enhance the natural bioremediation rate of organic constituents by controlling factors affecting microbial growth and metabolism. 

The spent-ore bioremediation technology involves biological processes that are both site specific and waste specific. Therefore, the technology must be engineered and tested for each site and for each waste stream treated. Large variations in contaminant concentrations could... 

The Remediation Technologies, Inc. (RETEC), slurry-phase bioremediation (liquid-slurry treatment) is an ex situ technology that uses naturally occurring bacteria to breakdown hazardous organic chemicals. The degradation process occurs in an engineered reactor, such as a lined lagoon, tank, or other similar vessel. 

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