hydrograv adapt

hydrograv adapt is an inlet construction for secondary settling tanks that adjusts itself continuously to the loadings of the influent.



Hydraulically infinitely adaptive inlet construction - the key to raising efficiency in waste water treatment

Secondary settling tanks are often overloaded. The reason is mostly the same: badly optimised tank hydraulics. Despite correct design beforehand. By adapting the inlet, however, it is possible to continuously optimise the hydraulic situation - a breakthrough in the operation of secondary settling tanks. The technology patented by hydrograv suits particularly overloaded tanks with poor effluent quality. The hydrograv adapt inlet improves the capacity of the secondary clarifiers by 50 per cent. That brings highest efficiency at every weather - always reliable. Of course also in case of retrofitting existing tanks.

The hydrograv adapt inlet operates - to give a simplified description - on the principle of a flexible water tap and automatically controls the inflow of the activated sludge liquor into the secondary settling tank adaptively to the currently optimal geometry. Because of the retrofitability and the consequentially improved performance of existing tanks the construction of new tanks which would otherwise be necessary can be circumvented.

The research results of Dr.-Ing. Martin Armbruster, managing director of the hydrograv GmbH, at the Institute for Hydromechanics at the Universität Karlsruhe (TH) are the basis for the development of the inlet construction hydrograv adapt.

Always highest efficiency - at dry weather and at stormwater
At stormwater and/or high SVI in winter a high inlet is optimal and at dry weather and/or low SVI in summer a low one. The opening has to be wide at high and narrow at low hydraulic loadings. Big are the differences of the optimal inlet geometry and high are the losses in efficiency if the tank is constructed and optimal for just one loading situation.

 

hydrograv adapt because

 

• a fixation only on one loading means dramatic losses in efficiency and consequently wasted capacity for every other situation.
• with an adaptation of the inlet geometry to dry weather and stormwater flow, respectively the clarifiers operate targetedly at the optimum and can treat up to 50 % more than their current design loading - and accompanied by the best achievable effluent quality.
• this variable flow optimisation combined withe the intelligent hydrograv control considerably reduces sludge displacement at stormwater flows.

stormwater	dry weather

Operating results of our prototype on a WWTP in western Germany
hydrograv adapt on your WWTP