MagneW 3000 PLUS Flowmeter for Open Channel

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Cecilia Walton
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1 MagneW 3000 PLUS Flowmeter for Open Channel Wastewater treatment application Yamatake Corporation October 2002 MagneW 3000 PLUS Open Channel type 1

2 Contents Environmental protection ISO Regulation for preventing Water Pollution (Japan, 1978) Total amount of wastewater restriction Monitoring total amount of wastewater Wastewater measurement Problems of wastewater flow measurement Yamatake Solution Field trial in Japan Exclusively certified by Japan Sewage Works Agency October 2002 MagneW 3000 PLUS Open Channel type 2

measurement Problems of wastewater flow measurement Yamatake Solution Field trial in Japan

3 A. Environmental protection Environmental protection: World-wide tendency 1. ISO ISO requires ISO registered manufactures to implement Environment Management System to secure environment The following continuous activities are governed by ISO Policy, 4.3 Plan, 4.4 Do, 4.5 Check, 4.6 Action 4.2 : Requires to meet regulations for wastes Continuous monitoring: Need continuous monitoring of factors which may affect environment. October 2002 MagneW 3000 PLUS Open Channel type 3

The following continuous activities are governed by ISO14000. 4.2 Policy, 4.3 Plan, 4.4 Do, 4.5 Check, 4.6 Action 4.

4 A. Environmental protection Environmental protection: World-wide tendency 2. Regulation for Wastewater Regulation for preventing Water Pollution in Japan (1978) Total amount restriction Design Guidelines for Sewage Treatment Plants in Singapore issued by PUB (2000). ( Code of Practice on Sewerage and Sanitary Works, article 2.3.8) PUB: Public Utilities Board (Sewerage Department) c) Effluent limitations guidelines by EPA in the U.S.A. (2000) EPA: Environmental Protection Agency Restriction of Discharge of pollutants into waters d) Cluster rule (1998) Restriction of discharging pollutants for Pulp & Paper industry Restrict Wastes/pollutant October 2002 MagneW 3000 PLUS Open Channel type 4

issued by PUB (2000). ( Code of Practice on Sewerage and Sanitary Works, article 2.3.

5 B. Monitoring total amount of wastewater Environmental Protection requires restriction of pollutants in wastewater. Two factors to be controlled; 1. Quality of water (water analysis) 2. Total amount of wastewater Regulation Needs to monitor/control total amount of wastewater October 2002 MagneW 3000 PLUS Open Channel type 5

6 C. Wastewater measurement 1.Most of wastewater flows in open channel. 2.Weir or partial flume with level transmitter is mainly used for open channel flow measurement. October 2002 MagneW 3000 PLUS Open Channel type 6

7 D. Problems of wastewater flow measurement 1. Parshall flume flowmeter (with ultrasonic level transmitter) (1)Installation cost is expensive. (2)Low accuracy: +/- 2~5% FS Especially when flow rate is low. (3)Choppy wave causes error. (4)Output is not linear. (5)Minimum sensing flow rate:0.72m3/h October 2002 MagneW 3000 PLUS Open Channel type 7

expensive. (2)Low accuracy: +/- 2~5% FS Especially when flow rate is low.

8 D. Problems of wastewater flow measurement 2. Weir type flowmeter (with ultrasonic level transmitter) (1)Installation cost is not expensive. (2)Low accuracy: +/- 3~5% FS Especially when flow rate is low. (3)Choppy wave causes error. (4)Output is not linear. (5)Minimum sensing level: 5cm October 2002 MagneW 3000 PLUS Open Channel type 8

expensive. (2)Low accuracy: +/- 3~5% FS Especially when flow rate is low.

9 E. Yamatake solution Magnetic flowmeter for open channel (1)Installation cost is not expensive. (2)Higher accuracy: +/- 1% FS Accurate even though flow rate is low. (3)Choppy wave never causes error. (4)Output is linear. (From 0~100%) (5)Minimum sensing velocity: 0m/s 2Q Gate Detector Dummy October 2002 MagneW 3000 PLUS Open Channel type 9

(3)Choppy wave never causes error. (4)Output is linear.

10 E. Yamatake solution Magnetic flowmeter for open channel Additional features (1)Easy installation (2)Maintenance Free (3)Accurate large flow rate measurement 2Q Gate Detector Dummy October 2002 MagneW 3000 PLUS Open Channel type 10

Free (3)Accurate large flow rate measurement 2Q Gate

11 E. Yamatake solution Magnetic flowmeter for open channel 1.Easy installation Offers lower installation cost. No piping is required. Installed in the open channel Installed at intake end of channel Installed in the pit Installed at discharge end channel Installed in the discharge tube Installed in the prefabrication sewage disposal plant October 2002 MagneW 3000 PLUS Open Channel type 11

Installed in the open channel Installed at intake end of channel Installed in the pit Installed

12 E. Yamatake solution 2.Maintenance free (1)All welded plastic housing structure. = provides perfect seal. (2)The detector has no moving parts. Offers long life. 30 years. October 2002 MagneW 3000 PLUS Open Channel type 12

13 E. Yamatake solution 3.Accurate large flow rate measurement Installation of low cost dummies for increasing flow rate. NNK detector Dummy flowtube No coil unit and electrode Q 2Q 3Q Gate Gate Gate Detector Dummy Dummy: 9 units max. October 2002 MagneW 3000 PLUS Open Channel type 13

14 F. Field trial in Japan Comparison test with V-Notch weir flowmeter Field trial at Tagi Sewage Works in Shimane prefecture. Output was compared with the reference meter. Reference meter Reference meter V-Notch weir meter Yamatake Open channel type magflow meter NNK October 2002 MagneW 3000 PLUS Open Channel type 14

Output was compared with the reference meter.

15 Test result F. Field trial in Japan Weir type flowmeter -50% error at low flow rate. Not sensitive at low flow rate. MagneW PLUS NNK Open channel type -1% error. Output from 0%. October 2002 MagneW 3000 PLUS Open Channel type 15

16 G. Exclusively certified products for wastewater treatment in Japan As a result of the field trial, Yamatake MagneW PLUS NNK is exclusively certified by Japan Sewage Works Agency. October 2002 MagneW 3000 PLUS Open Channel type 16

Yamatake MagneW PLUS NNK is exclusively certified by

Smart Electromagnetic Flowmeter Open channel Flowmeter Detector

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