{"id":2492,"date":"2023-11-06T11:49:41","date_gmt":"2023-11-06T10:49:41","guid":{"rendered":"https:\/\/www.di-camillo.com\/tipi-impianto-di-prima-pioggia-depurazione-acque-piovane\/"},"modified":"2024-04-19T10:20:10","modified_gmt":"2024-04-19T08:20:10","slug":"types-plant-first-rain-purification-rainwater","status":"publish","type":"post","link":"https:\/\/www.di-camillo.com\/en\/types-plant-first-rain-purification-rainwater\/","title":{"rendered":"First rain plants: identikit of a rainwater purification system"},"content":{"rendered":"

In the context of sustainable rainwater management, first rain systems<\/strong> are one of the most innovative technical solutions<\/strong>. In a period of water crisis, these systems allow the collection of rainwater, to treat it and allow its reuse, or the discharge on soil or in surface water.<\/p>\n

In this way, hydropower companies will not only become more environmentally sustainable. They can also save on the ever-increasing costs of water bills, with considerable image and economic advantages<\/strong>. And the environment, in all this, thanks.<\/p>\n

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First rain plants: types of treatment plants<\/h2>\n

\"Impianti<\/p>\n

We have already talked about the operation of the first rain plants<\/a>. The plants of first rain allow in the first step to separate the water of second rain, less polluted<\/strong>, thanks to a drain, then channeling the water of first rain towards the sand remover and the deoliator coalescence.<\/p>\n

The passage from the drain to the sanding chamber can be directed, or the water can be channeled into a series of tanks where the suspended materials carried by the rain settle. To this we owe the difference between plants of first rain in accumulation and plants in continuous.<\/strong><\/p>\n

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First rain plants in storage<\/h3>\n

The first accumulating rain plants include a first rain tank<\/strong>, to allow rainwater to separate from suspended materials, before proceeding with purification. The plant for the treatment of first accumulating rain water<\/strong> must therefore have a sufficient volume to collect and treat the first 4 or 5 millimeters of precipitation, depending on the regional legislation of reference. The calculation for the sizing of the first rainwater tanks must therefore take into account the draining surface (S)<\/strong> and the amount of mud capable of raising the volume of water (a coefficient Q = 100 is assumed when the amount of sludge is reduced, 200 when it is average, and 300 when it is high).<\/p>\n

Given the constant of the intensity of precipitation<\/strong> 0.0056 l\/s x sqm (given the 5 mm\/sqm in 15 minutes, or 20 mm\/sqm in 1 hour), can be calculated<\/p>\n