Abstract
A new reactor equipped with the string-type media twined with yeasts was developed in order to treat kitchen wastewater from restaurants and discharge it into sewerage system. The first treatment facility seeded with the mixture of the isolated mycelial yeasts, was installed at a restaurant in 1995. After three years, the treatment performance of this facility was investigated for a year. The yeast reactor was able to remove more than 90% of BOD and hexane extracts in spite of a large load variation. A part of the twined yeasts with media were separated by periodic excessive aeration and washed out. The separation of the twined yeasts resulted in 55-125mg/l of SS concentrations in the effluent. This yeast process could meet the discharge limits completely with no sludge disposal.
