Valmet TS in Beijing Gaobeidian Wastewater Treatment Plant serving 2.4 million people
In the Beijing Gaobeidian Wastewater Treatment Plant, sludge total solids from the primary clarifier varied from below 1 to 60 g/l, which means that from time to time only water is pumped to the sludge thickening tank. The Valmet TS total solids transmitter was installed in the outlet of the primary clarifier to control pumping.
|Location||Beijing Gaobeidian Wastewater Treatment Plant, China|
|Customer challenge||When the plant was built in the 1990’s, national standards for phosphorous and nitrogen in treated effluent had not yet been set and, because of high levels of nitrogen and phosphorous, treated wastewater did not meet criteria for even the national level V (not suitable for use in agriculture) surface water standard.|
|Solution||The Valmet TS total solids transmitter was installed in the outlet of the primary clarifier to control pumping.|
Since the installation of Valmet TS, personnel at the plant have been very satisfied with the unit and its capability for control over the range of 1 g/l to 60 g/l total solids in the system. Compared to an optical sensor accuracy has improved from ±1500 to ±500 mg/l with a correlation to the laboratory measurement of 0.996, and unlike the optical sensor, there is no need for maintenance.