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Real-Time Final Effluent Ammonium & Other
Key Parameter Monitoring
Jo Cooper
Product & Market Specialist
Intellitect Water Limited
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Real-Time Final Effluent Ammonium & Other
Key Parameter Monitoring
Analysis of real data
The monitor
Hints and tips
Benefits
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The Final Effluent (FE) Monitor
A multi-parameter (7) monitor
320mm in length
Flow cell mounted
24V DC
Direct insertion
Easy to fit sensors
No sample preparation
Flexible Real -Time Communications
Ethernet: TCP/IP
RS232/RS485:Modbus/SCADA
GPRS: TCP/IP/FTPAnalogue Outputs: 0 - 2.5V
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The Multi-Parameter Sensors
pH
ORP
Ammonium
ISE
Dissolved
Oxygen
(DO)
Conductivity
Turbidity
Temperature
36mm diameter sonde head
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The Ammonium ISE Sensor
Fast and accurate measurements
Stable measurement
Robust
Can be left dry for long periods
Concentration range 020mg/l
pH range 58
Temperature range 0+50oC
1 year life time
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Mounting of the FE Monitor in Flow Cell
GPRS Antenna
Inlet to Turbidity Sensors
Inlet to Chemical Sensors
Valves for flow
controlOutlet
PSU 24V DC
FE Monitor
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In-Line StrainerHayward Simplex basket strainer
Strainer basket 3.5mm mesh
Vertical mounting
Easy maintenance
Larger strainers are available
Spare Basket
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Strainer basket maintenance
Wear Personal
Protective Equipment
(PPE)
Clean with a water hose
(5 minutes)
For unmanned sites a
drop in flow is a good
indicator that the basketneeds cleaning
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Inbuilt Graphic User Interface (GUI)
Established via an
ethernet connection
Real-time readings at
a glance
Allows an easy
calibration (30 mins)
Data logging
frequency selection
(1/min1/hr)
Data retrieval (.dat,.xls)
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Heavy rainfall runoff seen in the peaks of increased
levels of ammonium at waste water treatment site
-
10.00
20.00
30.00
40.00
50.00
60.00
70.00
80.00
90.00
100.00
0 1/ 01 /2012 31 /01/ 20 12 01/ 03 /201 2 31 /03/ 20 12 30/ 04/ 201 2 3 0/ 05/ 2012 29 /0 6/ 20 12 2 9/ 07 /2012 28 /0 8/ 20 12 27/ 09 /201 2 27 /10/ 2012
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Reduction in flow indicating the strainer basket is in
need of cleaning
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0.45
0.5
25/09/2012 30/09/2012 05/10/2012 10/10/2012 15/10/2012 20/10/2012 25/10/2012
18/10: Clean strainer basket
re-instates flow.
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Heavy rainfall runoff impacting on flow through to the
FE Monitor
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0.45
0.5
25/09/2012 30/09/2012 05/10/2012 10/10/2012 15/10/2012 20/10/2012 25/10/2012
0
5
10
15
20
25
30
35
40
45
50
Flow Am monium
Heavy rainfall runoff
impacting on submersible
pump flow through to the
FE monitor
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Heavy rainfall runoff seen in the peaks of increased
levels of ammonium at waste water treatment site
-
10.00
20.00
30.00
40.00
50.00
60.00
70.00
80.00
90.00
100.00
0 1/ 01 /2012 31 /01/ 20 12 01/ 03 /201 2 31 /03/ 20 12 30/ 04/ 201 2 3 0/ 05/ 2012 29 /0 6/ 20 12 2 9/ 07 /2012 28 /0 8/ 20 12 27/ 09 /201 2 27 /10/ 2012
What happened
here?
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Heavy rainfall runoff impacting on submersible pump
flow through to the FE Monitor
0
5
10
15
20
25
30
35
40
45
23/12/201 1 12 /01 /2 012 01 /02 /20 12 2 1/ 02 /20 12 1 2/ 03/ 201 2 0 1/ 04/ 201 2 21 /04 /20 12 1 1/ 05/ 20 12 3 1/ 05/ 201 2 2 0/0 6/ 201 2 10 /07/2012
0
0.2
0.4
0.6
0.8
1
1.2
Ammonium Flow
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The importance of cleaning
-
10.00
20.00
30.00
40.00
50.00
60.00
70.00
80.00
90.00
100.00
29/07/2012 05/08/2012 12/08/2012 19/08/2012 26/08/2012 02/09/2012 09/09/2012 16/09/2012 23/09/2012 30/09/2012
What happened
here?
17/09: Calibration of
Ammonium after cleaning
of the sonde head
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Sonde head prior to cleaning on 17/10
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An increase in ammonium also results in an increase in
conductivity
0
200
400
600
800
1000
1200
06/02/2012 08/02/2012 10/02/2012 12/02/2012 14/02/2012 16/02/2012 18/02/2012 20/02/2012
0
1
2
3
4
5
6
7
Conductivity Ammonium
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Increasing DO levels as the Ammonium levels drop
after runoff highs
0
50
100
150
200
250
300
06/02/2012 08/02/2012 10/02/2012 12/02/2012 14/02/2012 16/02/2012 18/02/2012 20/02/2012
0
1
2
3
4
5
6
7
DO Ammonium
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Other key parameters
0
200
400
600
800
1000
1200
1400
1600
1800
2000
06/02/2012 08/02/2012 10/02/2012 12/02/2012 14/02/2012 16/02/2012 18/02/2012 20/02/2012
0
2
4
6
8
10
12
14
ORP Turbidity Temperature pH Ammonium
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Hints and tips
Keep the sensors clean Ensure adequate flow (25 litres/min at study site)
Filter particles > 3.5mm via a strainer/basket
Routine Maintenance Check basket every week
Aim to clean the basket every 2/3 weeks (some sites may
require a larger strainer/basket
Clean the sonde head and sensors every 3-6 months (site
specific)
A drop in flow can be used as an indication that cleaning of
the basket is required
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Benefits
Multi-parameter Reagent free
No sample preparation
Easy to replace sensors
Less frequent maintenance Ideal for unmanned sites
Reduced overall costs compared to traditional reagentusing technologies
Multi-parameter single source measurements to aid
determination of inter-relationships More single source diagnostic information to guide
preventative maintenance process improvements
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