STUDENTENWERK FRANKFURT AM MAIN

CANTEEN OF THE FH WIESBADEN UNIVERSITY

SPLIT-O-MAT®FAT SYSTEMATIC TREATMENT OF CANTEEN WASTEWATER CONTAINING GREASE

Many municipalities have tightened the threshold value for lipophilic substances from 250 mg/l (DIN 38409 T.17) to 100 mg/l. A grease separator corresponding to DIN 4040 or prEN 1825 does not guarantee the compliance of this threshold value in such cases.

Plant description

The canteen wastewater is carried away from the kitchen via floor channels. Via a wastewater inlet it enters a curved strainer where larger solids down to a diameter of 1.5 mm are held back.

The canteen wastewater, now free from solid matter, is then carried through a section where pH and temperature are measured. The main stream of the canteen wastewater is buffered in a pressurized integrator and stored. This allows to cut wastewater peaks and thus to avoid any overload and treat to the downstream stages.

The wastewater is pumped from the integrator through two fermenter lines with two fermenters. This is where the grease in the wastewater is decomposed through special microorganisms. For safety reasons, both fermenter lines work separately and independently in their capacities. During each of the process stages, that have been specifically adapted to the decomposition process, the wastewater remains in the fermenters until the desired decomposition level is reached.

After being treated, the wastewater is introduced into the sewage system with a pumping station. A posterior pH adjustment is not necessary with this system. No chemicals or additives are dosed. No odours form.

Performance data