Abstract: The space of most restaurant kitchens is so limited to accept a wastewater pretreatment apparatus with big size. In fact the users are reluctant to accept any container with holding time longer than 20 minutes. The authors developed a new facility on the basis of centrifuge and air floatation process to pretreat the restaurant wastewater rapidly before it is drained off. The theoretical research and the operation of pilot plant are OK. Best results have been obtained to remove the suspended organic matters which accounts for the larger portion of total organic pollutants and the output could be better to meet the requirement of discharge standard.