Herhof GmbH

schematic diagramm of water treatment system
(please click to enlarge)The humidity contained in the waste will be removed via a heat exchanger system, together with the circulating air from the compost mixture. The separated so-called condensate is fed into a two-stage air purification plant, consisting of a high-performance reactor and a downstream ultrafiltration system. From the Herhof-Rottebox^®, the condensate, which is comparable with household wastewater, arrives in a buffer, where a homogenisation of the concentrates (e.g. COD and ammonium) takes place. From there, the water will be pumped into the actual reaction container, the so-called high-performance bioreactor. There, microorganisms convert the water constituents at optimum operating conditions. A high-pressure pump conveys the cell culture suspension via the ultrafiltration system. While the cells are retained and recirculated into the high-performance bioreactor, the cleaned wastewater will be drawn from the permeate side of the membrane. After this treatment process, the permeate will be channelled into the cooling circuit of the composting boxes and will evaporate via open evaporative coolers.

The cleaning and evaporation of the condensate ensures a system operation without process wastewater.

The main advantages of the Herhof high-performance reactor are its compactness and the high efficiency of the process.

Additional advantages are:

• Low energy consumption
• Real pollutant removal, not pollutant transport
• Modular design with unlimited extension options
• Fully automatic operation