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DTSTART;VALUE=DATE:20500604
DTEND;VALUE=DATE:20500605
DTSTAMP:20260731T072353
CREATED:20191107T081542Z
LAST-MODIFIED:20191119T092101Z
UID:8326-2537913600-2537999999@suwanu-europe.eu
SUMMARY:Large-scale water reuse for agricultural irrigation in Milan from the San Rocco Waste Water Treatment Plant
DESCRIPTION:Large-scale water reuse for agricultural irrigation in Milan from the San Rocco Waste Water Treatment Plant\n\n		\n	\n\n	\n		\n			\n\n		\n	\n\n	\n		\n			 \nWaste water source\nThe wastewater source is a mixture of two main streams of municipal wastewater. About 40 % of the municipal wastewater of the municipality of Milan and part of discharge of the municipality of Settimo Milanese flow into the San Rocco wastewater treatment plant. The plant started full operation in December 2004. \nThe water quality of the effluent is monitored extensively on a daily basis. Besides internal monitoring\, also controls from the Milan town administration and the regional environmental agency verify conformity of the effluent. The Italian regulations define that E.coli might not exceed 10CFU/100ml in 80% of the samples when used for unrestricted irrigation. Some water quality parameters for the influent and effluent are visualized in the following table. \n\n\n\nParameter\nIN (mg/l)\nOUT (mg/l)\n\n\nBOD5\n168\n10\n\n\nTotal N\n35\n10\n\n\nTotal P\n35\n1\n\n\nTSS\n162\n10\n\n\n\nFrom an agronomical perspective\, the reclaimed water has adequate values with low sodicity\, low conductivity\, low toxic ions (boron\, chloride\, sodium) as well as low concentration of heavy metals. \n\n		\n	\n\n	\n		\n			 \nDistribution System\nPumps bring the water from the San Rocco reclamation facility towards two channels located 1.3 km further. From there\, the water is provided to the fields via an extensive (already-existing) network of open canals. This water transport is  gravity –based. \n\n		\n	\n\n	\n		\n			 \nFarming system\nThe main crops irrigated with reclaimed water in the area are corn (45%)\, rice (15%) and meadows and grasslands (40%). The area is located South of Milan and characterised by extensive and traditional forage crops and cereals. The first are usually irrigated by high pressure jets or low-pressure pivots\, while grassland and rice are flooded. This  agricultural area of particular landscape-environmental value is equally marked by the presence of a dense hydrographic network of irrigation ditches geb by the canal Roggia Ticinello. \n\n		\n	\n\n	\n		\n			 \nWaste water treatment description\nNutrient removal : Tertiary treatment technologies remove Nitrogen and Phosphorus to avoid eutrophication in the Po valley\, although relevant fertilizers for crops. N removal is performed by activated sludge recirculation with nitrification-oxidation followed by denitrification followed by the final decantation P removal is carried out by chemical precipitation and gravity sand filtering.\nPesticide removal : none\nDisinfection : Disinfection takes place using UV radiation. A low UV dose is applied for water discharge of the effluent in the Lambro Meridionale river during the winter\, while a higher UV dose is needed when the effluent is reused for agriculture or discharged in the river during the summer.\nSuspended solids removal : The tertiary rapid sand filtration removes besides P\, the suspended solids.\nOther : Odour removal \n \n\n		\n	\n\n	\n		\n			 \nCapacity\nIn 2011\, 72.8 hm3 water was treated in the facility of San Rocco. About half of this volume was produced during the irrigation period (during the summer months). Furthermore\, a share of this volume was discharged into the river\, resulting in 11.4  hm3 of annual reclaimed water for irrigation. \n\n		\n	\n\n	\n		\n			 \nExtent of the agricultural beneficiaries\n24\,630 ha agricultural area is irrigated with water originating from the San Rocco reclamation facility. \n\n		\n	\n\n	\n		\n			 \nCosts\nThe total capital cost for the wastewater treatment plant (including reclamation facility) of San Rocco amounted 136.2 million euros. The Milan town administration financed this amount.\nOperational costs are estimated at 0.115 euro/m³\, from which energy represents the largest component (> 40% of the operational costs). \n\n		\n	\n\n	\n		\n			 \nType of agreement\nThe farmer are grouped in farmers’ associations in charge of the agricultural irrigation. The Lombardy region delivers the reclaimed water for free to the farmers\, and only charges the pumping costs to distribute the water from the reclamation facility to the main channels (27\,000 euros/year for the farmers associations). \n\n		\n	\n\n	\n		\n			 \nScientific results\nMazzini\, R.\, Pedrazzi\, L. and Lazarova\, V. 2013. Production of high quality recycled water for agricultural irrigation in Milan. In: Lazarova\, V.\, Asano\, T.\, Bahri\, A. and Anderson\, J. (Eds) Milestones in water reuse: the best success stories. London: IWA publishing\, p. 179- 190. \nCastiglioni\, S.\, Bagnati\, R.\, Fanelli\, R.\, Pomati\, F.\, Calamari\, D.\, & Zuccato\, E. (2006). Removal of Pharmaceuticals in Sewage Treatment Plants in Italy. Environmental Science & Technology\, 40\, 357–363. https://doi.org/10.1021/es050991m \n\n		\n	\n\n	\n		\n			 \nAdditional information
URL:https://suwanu-europe.eu/project/template-copy-3/
LOCATION:Italy
CATEGORIES:Initiative
ATTACH;FMTTYPE=image/png:https://suwanu-europe.eu/wp-content/uploads/2019/11/san-rocco1.png
GEO:45.392984;9.2185077
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