WEHRLE Umwelt GmbH

Engineering, construction and operation of turn-key plants for the treatment of landfill leachates, waste bunker leachate, MBT plant effluents, digestates, manure, centrates etc. Depending on the discharge limits to be reached, the best suited technologies are being selected and / or combined: effective retention of pollutants by direct Reverse Osmosis or elimination of COD and NH4-N by high-performance membrane bioreactors (BIOMEMBRAT). This process can also be combined with active carbon or nanofiltration or indirect Reverse Osmosis. The over 200 references in these applications worldwide have proven the outstanding longevity and low operation costs WEHRLE plants typically stand for.

Also for industrial effluents WEHRLE offers a wide spectrum of technologies. But, the industrial client requires more than just technology: a reliable and high performance of the treatment system across changes of flow and load (e.g. by seasonal production or change of production lines) and throughout all climatic conditions. A modular design of the plant to make an upgrade simple and not costly, if, for instance, production capacity increases. Easy operation of the plant to allow outsourcing of the operation to a service company. The stable and high discharge quality of industrial high-performance MBRs enables the client to upgrade the system for water recycling / re-use to save fresh water, heat energy and water softening chemicals.

Sewage sludge mono-incineration plants are becoming increasingly popular for the disposal of sewage sludge and for future phosphorus recovery. Plants up to a certain size (for approx. 650,000 PE) can be realized quickly due to the simplified approval procedures. The standardization of this plant size reduces the investment costs and optimizes reliability and thus the operating expenses. WEHRLE K³sludge technology is based on a fluidized bed core unit with site-specific peripherals (sewage sludge drying, etc.). K³sludge is very compact and energy self-sufficient, no technical wastewater is generated. This allows flexible site selection, from greenfield sites to integration into an existing industrial site.

Flow:    100 m³/d

                         Inlet               Outlet    

COD:         15.000 mg/l       < 300 mg/l

NH4-N:         3.500 mg/l       < 200 mg/l

AOX:                  2 mg/l          <0,5 mg/l

Process Technologies

• Membrane Bioreactor BIOMEMBRAT®  plus
• Nanofiltration
• Active Carbon

Project

Engineered, built and operated by WEHRLE Umwelt GmbH

Commissioning: 2012

Together with Dutch Prime Minister Mark Rutte, Unilever CEO Paul Polman opens the new WEHRLE industrial effluent treatment plant for UNILEVER in St. Petersburg in 2013.

Effluent of Household and Personal Care (HPC) Production

Flow:    100 m³/d

                         Inlet               Outlet    

COD:         18.600 mg/l    < 1.400 mg/l

Tensides:  6.500 mg/l       < 140 mg/l

Process Technologies

• Balance Tank
• Membrane Bioreactor BIOMEMBRAT®

Project

Engineered and delivered by WEHRLE Umwelt GmbH,

installed and operated by Unilever St. Petersburg

Inbetriebnahme: 2013

Mechanical-Biological Treatment of unsorted municipal waste.

100.000 t/a mixed municipal waste is processed into:

38 % stable & valuable, low-chloride, easy to store and transport Residue Derived Fuel (RDF)

  5 % Biogas

38 % Water

10 % Minerals

  2 % Metals

  2 % Rests

( 5 % Losses)