To fulfil the requirements of small- and medium-size marble workshops, Matec produces plants for the purification of small water and sludge flows (up to 400-500 litres/minute), with the same quality standards and obtaining the same clarification levels that are typical of bigger plants. Matec produces systems provided with filtering bags, known as Big Bags, 90 cm x 90 cm x 120 cm in size, matched to silos in drilled stainless steel. Plants with 1 to 5 Big Bags, 1500 Kg to 7500 Kg of sludge, with or without a polyelectrolyte station.