Experiment could be done with pig manure as they were done with cattle manure. The treatment system is interesting as the ammonia emitted from the aeration is treated by a biofilter. The storage system used for the experiment is also interesting as the manure are stored in anaerobic conditions (those conditions are however uncontrolled). The gas emissions from the storage are also treated with another biofilter. No investment and operation costs are given for such installation. Such system needs maintenance and follow up to make sure that it operates correctly for the aeration part and also for the biofiltration.