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Whole Systems Approach to Ecological Design Organic Agriculture and Local Food Appropriate Technology: Energy Green Building & Retrofitting |
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Tank Based SystemsCan you write a few lines about Tank Based Systems before going into the Organica stuff?Organica of Hungary - Fed Batch Reactor (FBR)Organica has combined natural treatment biology with a highly engineered and computer-controlled mechanical technology to provide the most advanced expression of an ecologically engineered wastewater treatment system. This is most suitable for system larger than 3,000 pe to be installed in an urban location. The physical footprint is a fifteenth the size of a constructed wetland. It is a trade-off between land used and investment plus operating energy. (www.organica.hu) The system has the following characteristics:
The system runs four treatment cycles a day. The short retention time results in a low physical footprint. Finely tuned treatment cycles are controlled by a computer that can be accessed remotely. High efficiency aeration blowers have variable frequency drives and dissolved oxygen sensors enable the process computer to optimise energy performance. FBRs provide high levels of treatment performance. Here the average annual BOD was 8.2 mg/l with a highly variable influent, demonstrating the robustness of the system.
BOD Performance |
In countries with cold winters, FBRs are installed in greenhouses: 8,000-pe system outside Budapest
The planted ecologies make the greenhouses look like botanical gardens. A wide diversity of plants is grown.
The root mass in the reactors provide excellent attached growth treatment.
FBRs can be installed in urban locations, as there are no odours.
Typical cross-section of the greenhouse and tanks.
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