| Wastewater, Wastewater Treatment Plants, and AMD | | |
Wastewater is water used by humans in domestic, industrial, or agricultural activities, which, as a result of human activity, may contain organic or inorganic substances that are potentially hazardous to human health and the environment.
Monitoring wastewater parameters is essential for ensuring water quality and preventing environmental damage. Among the analytical parameters to be monitored, as established by current regulations, the most common are:- pH
- BOD5
- COD
- Total Nitrogen
- Total Phosphorus
- Heavy metals
- Pathogenic microorganisms
|
Monitoring of Wastewater Treatment
Plants Monitoring wastewater and sludge from wastewater treatment plants is an important process for verifying the effectiveness of the plants and ensuring the quality of treated wastewater. These inspections must be conducted regularly, in accordance with the procedures established by current regulations or discharge permits, generally within the framework of the AUA (Single Environmental Authorization). | |
AMD Stormwater Runoff
The acronym AMD stands for Stormwater Runoff and refers to rainwater that, when falling on impervious surfaces (such as roads, plazas, parking lots, roofs) of residential, commercial, or industrial areas, flows over them, carrying potential pollutants (oils, hydrocarbons, suspended solids, etc.).
The importance—or, more accurately, the necessity—of managing, treating, and analyzing stormwater runoff is fundamental for several reasons, primarily related to environmental protection and compliance with current regulations (in Italy, Legislative Decree 152/2006 and regional regulations).
Pollution Prevention The first rainwater runoff (known as first-flush runoff) is the most contaminated, as it washes over surfaces. If discharged directly into receiving water bodies (rivers, lakes, the sea) or into inadequate sewer systems, it can cause significant pollution.
Treatment
For this reason, the law often requires the collection and treatment of first-flush rainwater. This treatment typically involves:
Storage tanks To collect the first few millimeters of rain (often the first 5 mm), which are the most polluted.
Oil-water separation systems To remove oils, hydrocarbons, and settleable solids before final discharge.
Flood Risk Management The collection of stormwater is also important for controlling the volume of water that flows off in a short period, preventing sewer system overloads and flood risks such as flooding, especially in urban areas.
Reuse
In some cases, less contaminated or treated stormwater can be reused, for example, for non-potable purposes such as irrigation or flushing toilets, contributing to water conservation. | | First-Flush and Second-Flush
Rainwater: Stormwater management is based on the distinction between first-flush and second-flush rainwater, a classification that is crucial for pollution control, especially in urban and industrial settings.
This distinction is fundamental to stormwater management strategies. Analyses of both types of water are necessary to verify the presence and concentration of pollutants carried by stormwater, determine the most effective and sustainable treatment methods, and ensure that the final discharge does not compromise the quality of surface and groundwater, thereby reducing the environmental impact of industrial activities.
First-Flush RunoffFirst-flush runoff refers to the initial precipitation that follows a period of drought. It is potentially the most polluted because, as it flows, it washes pollutants (such as dust, oils, debris, and air pollutants) accumulated on surfaces (like yards and roads) into the water. Given the high pollutant load, regulations often require its separate collection and specific treatment prior to discharge (for example, through storage tanks and oil separators), in order to protect receiving water bodies.
Second-Rainwater
Second-rainwater refers to precipitation that falls after the initial phase (first rain). Since surfaces have already been largely cleaned by the first rain, this water has a significantly lower concentration of contaminants than the initial runoff. Unless there are prolonged events or persistent contamination, its environmental impact is lower, and in many cases, it can be managed with simplified treatment or discharged directly. | | Wastewater
Analysis The C.B.A. Chimica Biologia Ambiente laboratory performs all wastewater analyses necessary to verify compliance with legal limits. | |
| | AUA (Single Environmental Authorization) | |
This is an administrative measure introduced by Presidential Decree No. 59 of 2013, which transposed Directive 2008/1/EC on integrated pollution prevention and control. The AUA is issued by the SUAP (One-Stop Shop for Productive Activities) to any entity intending to carry out one of the activities subject to the AUA. The AUA application must be submitted to the SUAP at least 60 days before the start of operations.
Activities subject to the AUA are those that may have a significant impact on the environment, in particular:- industrial activities
- Energy production and distribution activities
- Waste treatment and disposal activities
- Wastewater treatment activities
- Processing and storage of hazardous substances
The AUA contains the requirements and limits necessary to ensure the environmental compatibility of the activity, covering atmospheric emissions (chimneys), wastewater (discharges), stormwater runoff (AMD), waste, safety, and the use of natural resources.
| | |  |  |  | | |
| ACCREDIA-Accredited Laboratory |
|
