ABSTRACT
Every farmer in the Netherlands needs a permission, according to the nuisance act, before operating. It is possible that this permission includes limitations and conditions according to a restricted emission of malodours. That contains treatment of air and/or slurry. For this treatment there are several technics available. All the possibilities increase the production cost without any effect on sale prices. In the paper attention is paid to the question about the position of the anaerobic digestion between the other technics. Most of the malodorous compounds disappear by anaerobic digestion. To prevent a malodour of the ventilation air a frequent cleaning of the animal house is necessary. Based on calculations in many situations anaerobic digestion will be the cheapest way to meet the conditions of the permission. Practical experiences prove this.
