The paper presents an analysis of the current state and design of a biowaste management system of in a model city of middle or north European Unio n countries. B iowaste is considered as a biodegradable component of household waste, evaluated in four types of built - up areas of the city: rural (suburban) area; villa area; panel housing estates and block - house estate areas. Variable biowaste generation is considered depending on the growing season. In this paper, the b iowaste is specified in accordance with the European List of Waste as sum of waste types No. 20 01 08 the biodegradable kitchen and canteen waste (specifically from households); No. 20 02 0 1 the biodegradable waste (waste from gardens in apartment and family houses) and the biowaste share from the mixed municipal waste (No. 20 03 01) . The economic model of generation, collection and treatment of the biowaste is developed and potential scenar ios of the biowaste management are evaluated from the economic point of view. A case study of the the biowaste management system of the city of Brno (Czechia) is presented. The evaluation of economic costs and benefits of the various proposed models for t he city is also presented, including the quantity of generated waste (containers rental costs, collection costs, costs for material recovery facilities etc.). Finally, a design of the best available solution for the biowaste management for the city is pres ented, with proposals and recommendations for the next steps, including a design of areas suitable for the application of different types of the biowaste management.