1. Sustainability through innovation in water analysis
Mdillon

2. Content Who we are? Drinking Water : filter backwash
What is innovation?
Hach plays the leading role innovating in water analysis.
Innovation Spotlight: COD, LDO, RTC

3. Hach is part of Danaher’s water quality group

4. DANAHER is driven by DBS - Danaher Business System
DBS is who we are and how we do what we do

5. Backwash optimization

6. Filtration Removal of particulate or microbiological contaminant
Turbidity
Suspended solids
Colloids
Bacteria
Knowing when to start and when to finish your backwash

7. Backwashing Purge solids removed from water during filtration
Solids collected on/within the filter are removed by reversing water flow up through the filter
Restore/maintain filtrate flux

8. Backwash When to start backwash
Run Time - depends on filters but hours max
Head Loss foot head loss
Particle or Turbidity Breakthrough
0.3 NTU
particle counts increase
When to stop backwash
Pre-set time period
Visual operator inspection
Volume
Turbidity results

9. Why Monitor Backwash Under washing Accumulation of solids in the bed
Mudballs
“Cementing” portions of the bed
Poor quality water
Short filter runs
Over washing
Excess water use
Short filter runs
loss of filter media
Increased operations costs
Ineffective filter ripening

10. Turbidity to Determine Backwash Duration
Why turbidity?
Turbidity reduction is primary purpose of filtration
Time based backwash can often lead to under backwash or over backwash
The American Water Works Association (AWWA) has recommended terminating backwash when the turbidity is in the range of 10 to 20 NTU in order to leave enough particulate matter within the filter to sustain effective performance during the beginning of the next filter run.

11. Backwash Turbidity
Hach Solitax sc in-line Turbidity Sensor to monitor filter backwash provides consistency in the wash process based on a real time turbidity measurement
The mounting allows the probe to be place directly in the filter trough or near the top of the bed for optimal measurement
Use of turbidity meters will ensure that backwash cycles happen only when necessary. This saves power! Most cycles are timed. Whether the filter needs it or not at a certain time the filter is cleaned.
Use of a turbidity analyzer will cause backwashed only when necessary and will turn off the cleaning cycle when the turbidity reaches a pre set level

12. Case Study: New Salem Water Treatment Plant, Bethlehem Town, New York

13. New Salem Water Treatment Plant
Capacity : 6 MGD Filtration type : Rapid Sand Filter (12 Filters) Raw Water : approx. 3 NTU Finished Water : approx NTU Backwash Criteria (Before) : 96 hrs filter run time, 6 ft head loss, 0.2 NTU filter effluent (whichever comes first) Backwash duration (Before) : 10 min high rate wash, with surface wash

14. Approach Solitax Turbidity/Solids sensor Installed above filter media
Infrared light source, reduced colour interference
Wide measuring range of up to 4000 NTU
Installed above filter media

15. Bethlehem, NY Baseline Backwash Turbidity profile

16. Bethlehem, NY Modified Backwash Turbidity Profile

17. Bethlehem, NY Comparing Profiles
6 mins of savings per filter

18. Results Good agreement between backwash turbidity profiles
Confidence with using turbidity profiles for backwash
Reduced high flow backwash by 50%, from 11 to 5 mins
Increase productivity by reducing waste water
Energy saving
Save approx. 7.5 MG (12 filters) of water annually
About USD $15,000

19. innovation

20. What is innovation ?
Who are the best innovators?
Dr. Russell Young, Global Chief Technology Officer, Hach Comp.
Joining Hach Company in 1995 as a Senior Research Scientist, he
was the lead technologist in the development/commercialization
of luminescence based technologies for the determination of
dissolved oxygen (DO) .
(Roll-Play for 1 min)

21. Roll-Play - EXAMPLE :
Use any sheet of paper you have in front of you to draw as many items that are circular in shape as possible..………… YOU HAVE 1 MIN !!

22. Roll-Play
1 minute
End

23. Roll-Play - SOME EXAMPLES :

24. Roll-Play
How many did you get?
1 – 4
5 – 8
8 – 11
11 – 15

25. innovating water analysis

26. A leader in industry firsts: COD LDO RTC
Innovation spotlight
A leader in industry firsts:
COD
LDO
RTC

27. COD – a true innovation Developed by Dr. Bruno Lange in 1975
Pre-measured reagents
Quick and accurate
Less time, less glassware
Reduce errors
Environmentally friendly
Barcode to eliminate error
Automatic Wavelength detection
10 x measurements (rejects abnormal readings)
In EU recycling avaiiable
ISO approved

28. Transmitted Blue Light
ldo – How it works
Blue light is transmitted to the sensor
The luminescent molecules in the sensor are excited by the blue light
The molecules relax emitting red light
The red light is detected by the probe
Low maintenance
No Drift and no contamination
Plug and Play with Hach’s digital technology
Transmitted Blue Light
Emitted Red Light
Photo Diode
Reference Red LED
The Life Span of Luminescence
is the time required for the molecules to relax from their excited state.

29. RTC: real time control
Control on/off aeration through ammonia & nitrate.
Add just enough DO to meet the ammonia setpoint.
Feed just enough chemical to meet setpoint.
This graphic introduces the bigger picture of RTC modules, and emphasize that only Hach offers the Real Time Controller.
Feed exact polymer to meet sludge density setpoint.
Calculate & maintain the best SRT for your system.
Tighter Process Monitoring and Controls
Minimizes operational costs (energy, chemicals)

30. RTC Innovation
Hach’s RTC (Real Time Control) solutions are complete off-the-shelf system
Adjust treatment processes in real time, keeping your facility compliant while reducing treatment costs
Why target aeration processes?

31. Optimizing Innovation
What benefits does optimizing bring?
DID YOU KNOW?
Austria began measuring and optimizing wastewater treatment plants 10 years ago. As a result they are seeing much reduced power consumption with the average power use decreasing by over 40%.
Austria now has some of the lowest power use per population equivalent of wastewater treated. Switzerland and Germany are following the same process to achieve reductions and have produced benchmark requirements to promote energy savings.

32. Energy Efficiency In Treatment Plants
RTC Innovation
What happens due to lack of intervention and understanding
Energy Efficiency In Treatment Plants
Plant Commissioned
Significant Performance Gap
Relative Power Consumption
What Should Happen Because of
Operator Efficiency Management
Net Result : Greater Operation Costs
Time (Years)
When was the last time a relative comparison was done between Year 1 and now?

33. EU Cohesion Fund in Water Sector to promote Sustainable Growth

34. Thank you for your attention