Milan and the collection of wet waste: help from the dissipator

The disposer, admitted by law, helps to reduce the organic fraction of household waste

In Milan on Monday 3 September the distribution of bags for separate waste collection, an adventure (it should be said) that will involve over 400,000 inhabitants starting from November 26. From that date it will be mandatory, for some areas of the city collect the wet separately, which today represents 37.4% of the total content of the undifferentiated bag.

Even the Milanese will therefore have to foresee a additional bag to contribute to the noble cause of environment protection. Bag that may be uncomfortable for many, due to the often confined space of city apartments and the smell caused by food. There separate collection of the organic fraction of waste it has been happening regularly for years in all or almost all of the municipalities of the hinterland, but managing it in the city including the densely populated areas is another thing.

It is not possible to postpone. Milan currently produces 1,500 kilos of municipal solid waste per minute, for 800 thousand tons per year. So far, every Milanese has thrown an average of 41 kilos of Forsu - Organic Fraction of Urban Solid Waste , thus weighing down landfills with a type of noble waste that can instead be reused as fertilizer or to produce new energy (biomass).

Technology could make a contribution on all fronts. There is for example a small household appliance, invented by InSinkErator in the United States in 1927, called "Heatsink", which actually dissipates all forms of food waste, transforming it into tiny particles that are eliminated by the sink drain, to which this instrument is connected.

In practice, the use of the heatsink allows you to keep hygiene in the kitchen and a major ease of waste disposal, originally eliminating part of the differentiation. Shredding organic waste and eliminating it thanks to the use of a sink is not only one practice permitted by Italian law, but it reduces the mass of waste in our already overloaded landfills and, where the separation of wet waste is envisaged, it significantly reduces management costs.

A recent experimental technical-economic feasibility study carried out in Chieri, funded by SMAT and ANIMA-UIDA, with the support of Polytechnic of Turin and the University of Verona, the local integrated water service management company (SMAT) and the municipal waste government authority (ATO-R Area Association Turin for the Government of Waste), has brought interesting data in this regard.

According to what emerged, in fact, the heatsink avoids the costs of collection (door to door) and transport of Forsu. According to the data published by ISPRA in 2011, in Italy, on average, a cost of collection, transport and Forsu treatment of € 50.1 / family / year can be estimated. The difference obtainable through the use of the heat sink would lead to an advantage as well as economic, environmental and health. In fact, if all 22 million Italian families were equipped with this system, there would be a decrease in costs of well over half a billion euros per year.

Video: Tirupati - Best in Solid Waste Management 1-3 lakh (October 2020).