Hach-Lange RTC113 ST-Module - Manual (Page 15)

15
General information
Figure 4 Adjustment of the polymer dosing rate to the feed flow rate
1 Static thickener 8 Pump for open-loop control of the polymer dosing rate
2 Measurement of the feed flow rate 9 Pump for the feed flow rate
3 Open-loop control of the polymer dosing rate (feed flow
rate measurement value)
10 Mechanical sludge thickener
4 TSS measurement from the influent 11 TSS measurement in the thickened sludge outlet
5 Open-loop control of the polymer dosing rate (influent
TSS concentration measurement value)
12 Closed-loop control of the polymer dosing rate
6 RTC113 ST-Module 13 Thickened sludge pump
7 Polymer supply 14 Digester