John Nurminen Foundation
JURMALA, Sloka WWTP
Tallinn 16.-17.3.2011
Part-financed by the European Union
(European Regional Development Fund and European Neighborhood and Partnership Instrument)
Dr.Sc. Ing. Romans Neilands
[email protected]
+371 26565048
Design figures
Dimensioning figures
The dimensioning inlet flows are as follows:
Design year 2015
Connected population
32 440
Required outlet concentrations
Daily average flow 9000 m3/d
Design flow, qdim
500 m3/h
SS
 35 mg/l
COD
 125 mg/l
Max flow to pre-treatment 1500 m3/h
Max flow to main process 750
m3/h
BOD5
The dimensioning inlet loadings are as
follows:
SS
2320 kg/d
256 mg/l
COD
4460 kg/d
493 mg/l
BOD5
2140 kg/d
236 mg/l
Total-N
480 kg/d
53 mg/l
Total-P
80 kg/d
9 mg/l
Part-financed by the European Union
(European Regional Development Fund and European Neighborhood and Partnership Instrument)
 25 mg/l
Total-N
 15 mg/l
Total-P
 2 mg/l
Results 2010-2011 March
Parameter
Suspended solids
COD
BOD5
Total nitrogen
Total phosphorus
Demand
mg/l
35
125
25
15
2
HELCOM
recommendations
mg/l
15
15
0.5
%
80
70-80
90
Achieved (average
2010)
mg/l
4.1
45
6
14
0.42
Part-financed by the European Union
(European Regional Development Fund and European Neighborhood and Partnership Instrument)
%
99
82
98
74
94
Achieved (average
2011 Jan-March)
mg/l
3.8
48
7.3
23.2
0.39
%
99
80
97
71
95
POYRY. Technical audit of the Jurmala Wastewater treatment plant, 2010
Part-financed by the European Union
(European Regional Development Fund and European Neighborhood and Partnership Instrument)
Date
Part-financed by the European Union
(European Regional Development Fund and European Neighborhood and Partnership Instrument)
augusts 2010
jūlijs 2010
jūnijs 2010
maijs 2010
aprīlis 2010
marts 2010
februāris 2010
janvāris 2010
decembris 2009
novembris 2009
oktobris 2009
septembris 2009
augusts 2009
jūlijs 2009
jūnijs 2009
maijs 2009
aprīlis 2009
marts 2009
februāris 2009
janvāris 2009
mg/l
T , N&P
20.0
18.0
16.0
14.0
12.0
10.0
Temperature C
Ntot, mg/l
Ptot, mg/l
8.0
6.0
2011
4.0
2.0
0.0
Operation dificulties
1. Process stability during winter (temperature
about 7°C);
2. Low hydraulic load (high HRT and SRT
values);
3. Low loaded in terms of organic (low organic
C source for nitrogen conversation);
4. Alcalinity control;
Part-financed by the European Union
(European Regional Development Fund and European Neighborhood and Partnership Instrument)
Part-financed by the European Union
(European Regional Development Fund and European Neighborhood and Partnership Instrument)
400.0
350.0
300.0
FIQ01
FIQ03
250.0
FIQ04
FIQ06
200.0
FIQ07
FIQ09
FIQ08
150.0
FIQ02
100.0
50.0
3/
8/
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Inlet Q adjustment with Return sludge flow
Part-financed by the European Union
(European Regional Development Fund and European Neighborhood and Partnership Instrument)
Additional pH, ORP and DO
measurements
Idea to make use of simple measurements, as those of pH, DO and ORP, not directly for the control,
but to estimate the state of process
Preliminary pH and ORP behaviours on anox&aerobic phase
The first test structure pH and ORP signals on
stoihiometric converasation
Part-financed by the European Union
(European Regional Development Fund and European Neighborhood and Partnership Instrument)
Process
Part-financed by the European Union
(European Regional Development Fund and European Neighborhood and Partnership Instrument)
Part-financed by the European Union
(European Regional Development Fund and European Neighborhood and Partnership Instrument)
Part-financed by the European Union
(European Regional Development Fund and European Neighborhood and Partnership Instrument)
Part-financed by the European Union
(European Regional Development Fund and European Neighborhood and Partnership Instrument)
D.B. Clarifier, 2009
Process improvement
POYRY. Technical audit of the Jurmala Wastewater treatment plant, 2010
Part-financed by the European Union
(European Regional Development Fund and European Neighborhood and Partnership Instrument)
POYRY. Technical audit of the Jurmala Wastewater treatment plant, 2010
Part-financed by the European Union
(European Regional Development Fund and European Neighborhood and Partnership Instrument)
Part-financed by the European Union
(European Regional Development Fund and European Neighborhood and Partnership Instrument)
POYRY. Technical audit of the Jurmala Wastewater treatment plant, 2010
Bioavailability
Part-financed by the European Union
(European Regional Development Fund and European Neighborhood and Partnership Instrument)
?
Bioavailability:
Division of the total influent COD in
municipal wastewater into its various constituent fractions.
Part-financed by the European Union
(European Regional Development Fund and European Neighborhood and Partnership Instrument)
Bioavailability:
Fractions of nitrogen in wastewater.
Part-financed by the European Union
(European Regional Development Fund and European Neighborhood and Partnership Instrument)
Bioavailability:
Fractions of phosphorus in domestic wastewater.
Part-financed by the European Union
(European Regional Development Fund and European Neighborhood and Partnership Instrument)
Part-financed by the European Union
(European Regional Development Fund and European Neighborhood and Partnership Instrument)
Proposals to improve nutrient
control in WWTP efluent
Research Bioavailability:
• OBP- organic bound phosphorus
• EON-effluent organic nitrogen
• DON- dissolved organic nitrogen in effluent
Proposals:
1. Wastewater effluent fractionation
2. Criteria for Stoichiometric nutrient limitation
Part-financed by the European Union
(European Regional Development Fund and European Neighborhood and Partnership Instrument)
Thank you…!
Part-financed by the European Union
(European Regional Development Fund and European Neighborhood and Partnership Instrument)