Database of Waste Management Technologies Life

Case Study 6 - Composting

 

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Name: Biowaste Composting Facility in Cloppenburg-Stapelfeld case study 6

Biowaste Composting Facility in Cloppenburg-Stapelfeld

Owner: -
Operator: Nehlsen GmbH & Co. KG Niederlassung Nord-West 26434 Wangerland
Technology: Composting in boxes (Herhof-Boxes)
Designed Capacity: 20,000 tpa
Cost: n/a
Location: Cloppenburg-Stapelfeld, Germany
Served Area: Cloppenburg district
Commercial Start Up: 1994
Contact Details
Address: Henkingsweg
49661 Cloppenburg Germany
Phone Number: +49 044 71 94 76 60
Fax: + 49 044 71 94 76 61
Email: ka-cloppenburg@biokomp.de
Website: -

 

Short Description

The biowaste composting facility in Cloppenburg-Stapelfeld, Germany, is part of the central waste disposal area of Cloppenburg district. The nearest residential area is about 0.5 km away.

The facility processes source separated biowaste from households, yard waste from residential, institutional and commercial sources and potato processing waste. It is in operation since July 1994, has a current capacity of 20,000 tpa and employes 3,5-4 people. Composting is carried out in 12 boxes (Herhof Composting boxes), each with a volume of 50 m3. Further equipment includes 2 front-end loaders, 1 trommel screen, 1 self-built air classifier, 1 hammermill, 1 overhead magnet, 1 handsorting room, 2 biofilter boxes ( 50 m3 each) various belt conveyors. Temperature in the off-gases are initially controlled at 45 oC for optimum degradation and then at 60 oC for 3 days for pathogen control. A composting box is devided into six different aeration segments and has 1 blower for fresh air and 1 blower for the off-gas and air recirculation. Leachate is recirculated to keep the moisture content of the biowaste at 50% by weight and to avoid discharging highly contaminated water into the sewer at high costs. The retention time in composting boxes are 6-7days plus 2 weeks in windrows (end-product is fresh compost) or 10-12 weeks in windrows (end product is a mature compost)

 

Key Facts

Treatment Capacity: 20,000 tpa
Input Material: Source separated biowaste 20,000 tpa
Yard waste
Potato processing waste
Output Products: Compost -

 

Extra Information

Display of biowaste decomposition with the Herhof box system.