C CHEMISTRY; METALLURGY
C02 TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
C02F TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
2209/00 Controlling or monitoring parameters in water treatment
C02F2209/005 Processes using a programmable logic controller [PLC]
C02F2209/006 comprising a software program or a logic diagram