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The Municipality of Athens (M.A.) currently comprises 7 municipal districts, 7 waste collection&#x0D;districts (WCD) and approximately 5800 residential blocks. Solid waste is collected daily on a&#x0D;7 days per week basis. The M.A. comprises approximately 119 waste collection sub-districts&#x0D;(herein referred to as ‘collection programs’ or simply ‘programs’). Each ‘program’ consists of a&#x0D;number of adjacent residential blocks, whilst certain special programs include only central&#x0D;streets in Athens (e.g. Aharnon, Patision) or the commercial center of Athens. During the past&#x0D;years, each waste collection vehicle has been making 2 daily trips to the final disposal site in&#x0D;the Attica region, in Liosia. The above scheme is the basis on which daily collection of&#x0D;municipal solid waste (MSW) in the M.A. takes place. The actual residents at each residential&#x0D;block in Athens were based on the 2001 census. The coding of the National Statistical&#x0D;Agency was initially used and adjusted to the residential blocks’ coding used by the M.A. The&#x0D;residential blocks included in each collection program were precisely identified. Average unit&#x0D;waste production rates (UPRs) were estimated for each collection program using:&#x0D;• vehicle net weights data for February and July 2002 at the central Liosia landfill&#x0D;• actual population for each residential block in Athens (2001 census) and&#x0D;• number of residential blocks at each collection program&#x0D;The number of waste storage containers (WSC) at each residential block was estimated by&#x0D;accounting for a 1,1 m3 container volume, a 80% fill ratio and a 95 kg m-3 uncompacted waste&#x0D;density. As a result of the above, UPRs and the required number of WSC were estimated for&#x0D;each residential block, each collection program, each WCD and for the M.A. as a whole.&#x0D;Sunday has the smallest production of MSW during a week, whilst Tuesday is the day with&#x0D;the largest amount of MSW produced within a week. The average production rate for the M.A.&#x0D;was estimated to be 3,8 kg cap-1 d-1, ranging from 1,3 kg cap-1 d-1 (for district 6) to 8,9 kg cap-1 d-1&#x0D;(for district 1). The relatively large UPR recorded for district 1 is attributed to the increased&#x0D;number of commercial stores (center of Athens) and due to the relatively small recorded&#x0D;actual population, since few apartment buildings exist in the center of Athens. The total&#x0D;number of waste storage containers required in the M.A. is approximately 16660, whilst the&#x0D;existing number is approximately 14580.

Municipal solid waste unit production rates and estimation of the required number of waste storage containers in the municipality of Athens