sanepar curitiba – brazil presented by: erik marnung sales manager industry...
TRANSCRIPT
Content
1. About Primozone
2. Ozone for filamentous sludge treatment
3. Ozone for reduction of pharmaceutical residues
About Primozone
Founded in 2000, Sweden
Industrial owner Westfal-Larsen Technology, Norway
First ozone installation in 2006 - now in 25+ countries on 5 continents
Experienced ozone provider – designs complete ozone solutions
R&D and production in-house
ISO 9001 & 14001 certified
A: Lund University, Water & Environmental TechnologyB: Primozone Production ABC: NSVAD: Aalborg University, Biotechnology
Filip NilssonA,B, Marinette HagmanC, Artur Tomasz MielczarekD
Per Halkjær NielsenD & Karin JönssonA
Application of Ozone in Full-Scale to Reduce Filamentous Bulking Sludge at Öresundsverket WWTP
Bulking sludge is very common at WWTPs using activated sludge.
Usual culprits in municipal WWTPs: Microthrix parvicella, Curvibacter and phyla TM7.
Can cause:• Reduced settling• Decreased capacity• Reduced solids retention• Increased costs
Introduction
Possible to remedy with:• Changing process parameters• Non-specific methods such as Ozone or PAX
However, care must be taken to safeguard the biological processes with either approach
Introduction
Öresundsverket WWTP
• Commissioned in 1974, Helsingborg, Sweden
• Not uncommon with DSVI > 200 ml/g
• Designed for 220 000 PE (150 000 PE in 2012)
• Flow 70 000 m3/day or 1.85 MGD
• Largest Bio-P (EBPR) plant in Sweden
Courtesy of: Salar Haghighatafshar, Lund University, SVU Report
• UCT Process, EBPR
Anaerobic
Aerobic
Aim
Reduce the DSVI down to manageable levels with ozone in full-scale
Gain information on the bacterial population subjected to ozone treatment
Observe the Bio-P and nitrification processes during ozonation
Full-Scale Ozone System
Sampling
Operating parameters:• DSVI• VSS• Nitrification rate• Biological phosphorus release rate
Samples for Q-FISH and light microscopy
Additional samples:• NH4-N• NO3-N• Total N• Total P
Key Figures
• In operation for 45 days
• Ozone production 900 g O3 / hr
• Ozone concentration 200 g O3/Nm3 (13% wt)
• Ozone dose 2.8-5.0 g O3/kg SS
• 42 m3 return sludge / hr, ~5% (185 GPM)
• ~11 minutes HRT @ 1.1-1.2 bar
• 8 days production stop
DSVI
-40 -35 -30 -25 -20 -15 -10 -5 0 5 10 15 20 25 30 35 40 45 5080
100
120
140
160
180
200
220Reference lineOzone line
Days into the study
DS
VI
(ml/
g)
Anaerobic
Aerobic
0 5 10 15 20 25 30 35 40 45 501
1.5
2
2.5
3
3.5
4
4.5
5
Reference lineOzone line
Days into the study
Nit
rifi
cati
on
rat
e (m
g N
H4-
N/g
VS
S*h
)Nitrification Rate
0 5 10 15 20 25 30 35 40 45 500
2
4
6
8
10
12
0
2
4
6
8
10
12
14
16
18
Reference lineOzone lineTemp
Days into the study
Ph
osp
ho
rus
rele
ase
rate
(m
g P
O4-
P/g
V
SS
*h)
⁰C
Bio-P
Conclusions
• The application of 2.8-5.0 g O3/kg SS in the return sludge can significantly reduce the DSVI of activated sludge.
• No adverse effect on neither Bio-P nor nitrification rate could be discerned.
2. Ozone for reduction of pharmaceutical residues
Where do pharmaceuticals come from?
Why is it a problem?
Ozone and pharmaceuticals
Pilot-scale results
Pharmaceuticals found in wastewater
Type Examples
Painkillers Codeine, Tramadol, Diclofenac
Anti-convulsant Carbamazepine
Anti depressants Citalopram, Bupropion
Anxiety repression Oxazepam
Heart disease Metoprolol, Irbesartran
Antibiotics Trimetoprim, Sulfomethoxazole
Estrogen Levonorgestrel
Where do they come from?
A large portion of the pharmaceuticals used in society ends up at wastewater treatment plants (WWTP).
•Individuals•Hospitals•Manufacturing•And others
Most of those are not removed at the WWTP and ends up in the discharge.
From there it´s only a matter of time before they end up in the waterways.
Why is it a problem?
Stable compounds (lingers in the water)
Interactions with wildlife
Combinatory effects (pharmaceutical cocktail)
Eventually they end up in the human biosphere again.
Ozone and Pharmaceuticals
Ozone attacks electronegative areas and breaks up the molecule into smaller pieces.
The resulting compounds are much more biodegradable in sand filters and the like.
Pilot-scale experiment
Lundåkraverket WWTP 2012, Landskrona, Sweden
Pilot-scale experiment
Results of pilot-scale test
Ozone dose (g/m3)
Reduction (%)
Ozone before filter 10µm
Ozone after filter 10µm
2 10% 48%
5 80% 95%
9 88% 97%
• 24/46 compounds were found consistently
Thank you!