Wett and Puempel DEMON technology
Transcript of Wett and Puempel DEMON technology
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DEMON technology for high-strength ammonia liquors
B. Wett and T. Puempel
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Deammonification Stoichiometry
1 mol NO2-
1.9 mol O2
1 mol NO3-
34 g CSBSubstrat→
10 g CSBBiomasse
≈ 60 %
1.4 mol O2
≈ 75 %
1 mol NH4+ 0.44 mol N2
+ 0.11 NO3-
0.57 mol NO2-
0.8 mol O2
≈ 40 %(Anammox)
partial
nitritation
anaerobic ammonia oxidation
autotrophic
nitrite reduction1.14 mol H+
Cinorganic
0.03 mol H+
Cinorganic
1 mol NO2-
1.9 mol O2
1 mol NO3-
34 g CSBSubstrat→
10 g CSBBiomasse
≈ 60 %
1.4 mol O2
≈ 75 %
1 mol NH4+ 0.44 mol N2
+ 0.11 NO3-
0.57 mol NO2-
0.8 mol O2
≈ 40 %(Anammox)
partial
nitritation
anaerobic ammonia oxidation
autotrophic
nitrite reduction1.14 mol H+
Cinorganic
0.03 mol H+
Cinorganic
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Deammonification Stoichiometry
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influent flow [L/s]
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DO [mg O2/L]
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pH
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water depth [mm]
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resource requirements of sidestream deammonification Strass (DEMON)
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kg
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g N
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sp
ecif
ic a
mm
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ia l
oad
[kg
N/m
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specif. NH4-load specific energy spec VSS dosage
Nitritation/Denitritation DEMON
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N-removal efficiency of sidestream deammonification Strass (DEMON)
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icie
ncy [
%]
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oad
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specif. NH4-load ammonia removal
Nitritation/Denitritation DEMON
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Einleitung
Energy self-sufficiency
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Au
g. 0
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No
v. 0
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b. 0
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y. 0
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g. 0
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g. 0
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v. 0
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b. 0
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y. 0
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g. 0
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v. 0
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Wh/PE
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%production [Wh/PE] consumption [Wh/PE] self-sufficiency [%]Im
ple
me
nta
tio
n D
EMO
N
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Cofermentation at WWTP Strass
- with cofermentation of food wastes - degree of self-sufficiency up to 200%
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%Wh/PE production [Wh/PE] consumption [Wh/PE] self-sufficiency [%]Im
ple
men
tati
on
DE
MO
N
co-f
erm
en
tati
on
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FISH image of Demon biomass sample from Strass WWT plant. no evidence of a comprehensive AOB layer around the granule
AMX granule (probe Amx820-Cy3)
AOB(probe Nso1225-Cy5)
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DEMON-features – • pH-based process control • cyclone for anammox enrichment
Side-stream applications: DEMON
2004 2013
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pH-based process control
Ae
rati
on
an
d fi
llin
g
Ae
rati
on
Stir
rin
g
Stir
rin
g an
d f
illin
gpH
wat
er le
vel
dp
H
time
time-band
d t2 d t3 d t4
pH-band
reaction sub-cycle
d t1
water level
DO 1.0
0.5
0.0
7.5 pH
7.0
6.5
General control philosophy of the DEMON® process operating individual process steps within set bands of pH and time (left) resulting in stable intermittent aeration pattern (right)
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cyclone for anammox enrichment
Set-up of a triple DEMON® cyclone configuration (left) selecting for a high anammox retention time based on density difference between the flocculant- and the granular sludge fraction
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Cyclon for selective SRT
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NH4-N NO3-N NO2-N
N-c
on
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time (min)
cyclone under-flow (recycled) and overflow (wasted)
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time (min)
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Einleitung
Start-up DEMON Heidelberg
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High alkalinity in landfill leachate
Leachate collection in Bogota ... and in Quito
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Alkalinity balance – landfill leachate
NH3 NH4
+
+OH-
NOx-+
H+
N2
digestion
anaerobic
oxidation
aerobic
reduction
anoxic
Σ sum of ions = 0 0 0 0
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1-J
ul-0
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31-J
ul-07
30-A
ug-0
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ep-0
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ct-0
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ov-
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ec-
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NH4-N Abl. PRZW [mg/l]
Sickerwasser [m³/d]
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High COD/N ratio
• High COD concentration challenges selection to maintain high SRT for anammox • Applications for biowaste digestion liquors and rejects from thermal-hydrolyses plants
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Feed characterisation and ramp-up of loading
0102030405060708090
100
% Cambi
% Cambi
NH4-N CODtotal CODsol CODsol NH4-N NO3-N NO2-N Norg,sol
02.07.2010 2340 6000
21.07.2010 2060 7850 5500 1190 127 75 1
26.07.2010 2050 6385 4855 2105 183 82 1.5
02.08.2010 3055 213 127 1.6
09.08.2010 2910 128 51 1.8
10.08.2010 2260 9500 6130
17.08.2010 2350 15650 7200 2590 202 136 0.6 132
CAMBI-liquor effluent
High COD/N ratio – Cambi liquors
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DC Water Blue Plains
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DC Water’s Thermal Hydrolysis and Anaerobic Digestion
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Einleitung
Operating temperature
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Start-up DEMON Pustertal
6.12.2012 – 31.1.2013: 7 weeks from seeding to end of performance test
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Performance test DEMON Pustertal: Hydraulic load 10% beyond design load of 1828 m3/d at HRT of 0.75 days and ammonia removal efficiency beyond model-prediction of 74% (limited alkalinity in condensate)
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nitrit
e (mg
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500 mg/lfiltered CODin filtered CODout TSS (g/l)
During start-up nitrite concentrations never exceeded 10 mgN/L and leveled off towards the nitrite half-saturation value of 1 mgNO2-N/L and MLSS-concentration plateaued at 2 g/L
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Simulated shifts in microbial populations in mgCOD/L during the 7 weeks’ start-up period of the DEMON-plant Pustertal (Italy) showing a steady enrichment of anammox biomass
Modeled population dynamics
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DEMON-plant Lavis for leachate treatment
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Qd NH4-load
Q (m
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/d)
phase I start-up
phase II COD>>
phase III + IV COD<<; T<<
Measured daily hydraulic- and ammonia loads of the leachate treatment system Lavis during the first 6 months of operation
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Profiles for nitrogen fractions, COD and temperature
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