SUB-IRRIGATION DRAINAGE SYSTEM

The wastewater treatment plants with sub-irrigation drainage are of the underground type and consist of a grease separator for treating wastewater from kitchens, an imhoff tank for eliminating suspended solids from bathrooms and an anaerobic percolating filter for compliance with the sub-irrigation drainage. Wastewater treatment plants with sub-irrigation discharge allow compliance with the table for sub-irrigation discharge. All containers have hatches at the top to allow purging and inspection operations. These purification treatments are used in the activities of the local authorities.