It is a compact and efficient system for pretreatment of municipal. However, the risk of changes in the assumed reality is even greater. For example, expanding a factory without enlarging the treatment system is obviously more significant than an. Imhoff tank sswm find tools for sustainable sanitation. The first plant was put into operation two years later. Scribd is the worlds largest social reading and publishing site. Greywater treatment by high rate algal pond under sahelian. It consists of a vshaped settling compartment above a tapering sludge digestion chamber with gas vents. Imhoff tank free download as powerpoint presentation. Septic tank is a better solution for small population, especially with mixed wastewater black and gray.
Imhoff tanks can homogenizes effluent on pollutants peaks presence. The history of imhoff technology a treatment process for its time by tom asmus. The imhoff tank is usually built underground with reinforced concrete. It can, however, also be built above ground, which makes sludge removal easier due to gravity, although still requiring pumping up of the influent. Imhoff tank should be used for medium domestic community. Chemically enhanced primary treatment and sustainable secondary treatment technologies for use with imhoff tanks by robert c. Introduction wastewater reuse in irrigation has been reported worldwide including in. Small prefabricated imhoff tanks are also available on the market. A imhoff tank installation is always subject to authorization by institutions. Mclean submitted to the department of civil and environmental engineering on may 8, 2009 in partial fulfillment of the requirements for the degree of masters of engineering in.
The imhoff tank obtained its name from its inventor, dr. The imhoff tank also known as emscherbrunnen or emscher tank, which works similar to a communal septic tank, is a robust and effective settler that causes a suspended solids reduction of 50 to 70%, cod reduction of 25 to 50%, and leads to potentially good sludge stabilisation depending on the design and conditions. The technology was developed in the emscher district of germany and patented in 1906 by dr. The imhoff tank is a primary treatment technology for raw wastewater, designed for solidliquid separation and digestion of the settled sludge.
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