W&A Small digestion Plant
| Location | Germany |
| Construction Period | 1997 -1999 |
| Input | Black water, kitchen waste |
| Fermenter | 6 m³ |
| Gas | Gas stove |
| Specials | 6 m3-digester for the digestion of blackwater of several houses equipped with vacuum toilets, modular system |
| Responsibility | Basic evaluation, pre-, draft- and execution planning incl. pre-fabrication and final assembly, site management/project controlling, start-up (for TBW GmbH) |