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Comment Water Treatment

AI-supported polymer-dosage system slashes operating costs

By Gerald Ondrey |

Last month, Andritz AG (Graz, Austria; www.andritz.com) introduced its next-generation of Metris addIQ RheoScan, the world’s first patented, optical-measurement system for automatic polymer dosage in belt presses and gravity belt tables. The new generation uses artificial intelligence (AI) to optimize polymer dosing. Savings in polymer lead to operating expenditure (opex) reduction by up to 40% for sewage sludge, coal sludge or paper sludge dewatering, the company says. Using the “cutting-edge” technologies also help to maintain optimum cake dryness and to identify blinded belts, which in turn leads to smoother operations. Installations in wastewater treatment plants with digestion processes have seen the additional benefit of higher biogas yields. The new squeeze-control option enables the system to operate at the capacity limits of the machine 24/7, effectively eliminating downtime. With Metris addIQ RheoScan, an imaging system takes pictures of the sludge surface. Each picture is divided into multiple sub-images that are classified by a previously trained convolutional neural network (CNN) regarding its particular flocculation condition, which are represented by texture and color of the sludge (see example photos). The total…
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