Objective
The project is to demonstrate the use of bioreactor technology for the treatment of ground water contaminated with toluene. The polluted ground water will be pretreated in a sedimentation tank and sand filter in order to remove suspended solids. Then, the contaminated water will be treated in a down-flow, fixed-bed bioreactor, microbes that grow on the filter bed digesting the toluene. Oxygen will be introduced by a downward air flow through the reactor so as to restrict stripping of volatile compounds to a minimum. Any stripped compounds will be removed from the air by a biofilter.
The technical and economical feasibility of cleaning up toluene contaminated groundwater using aerobic bioreactor technology has been demonstrated. The technology uses a trickling filter bioreactor. After solving some start up problems, it was shown that this type of reactor reliably removes BTEX at almost 100%, at an organic load rate of 3 grammes per cubic metre per hour. The polluted ground water as pretreated in a sedimentation tank and sand filter in order to remove suspended solids. Then, the contaminated water was treated in a down flow, fixed bed bioreactor, microbes that grow on the filter bed digesting the toluene. Oxygen was introduced by a downward air flow through the reactor so as to restrict stripping of volatile compounds to a minimum. Any stripped compounds were removed from the air by a biofilter.
Comparison of the bioreactor technology with other technologies, such as stripping, biorotor or active carbon filtration showed that the bioreactor technology was economically advantageous for long term clean up projects taking more than 2 years.
The DHV MILIEU & INFRASTRUCTUUR bv based at Amersfoort/Netherlands has demonstrated the technical and economical feasibility of cleaning up toluene-contminated groundwater using aerobic bioreactor technology. The project was assisted, during three years, by the European Commission within its ACE 89 programme for demonstration projects on clean technologies and on monitoring and rehabilitating contaminated sites.
The technology uses a trickling-filter bioreactor. After solving some start-up problems, it could be shown that this type of reactor reliably removes BTEX at almost 100 %, at an organic load rate of 3 g/m3.h.
Comparison of the bioreactor technology with other technologies, such as stripping, biorotor, active carbon filtration showed that the bioreactor technology was economically advantageous for long-term clean-up projects taking more than two years.
Thus, the excellent performance as well as economical limits of application of the bioreactor technology for the removal of BTEX from water could be demonstrated within the project.
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Programme(s)
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Topic(s)
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
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Funding Scheme
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Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
3800 BB Amersfoort
Netherlands
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.