dairy industry wastewater: low ph nutrient remediation. dr. niall o’ leary
TRANSCRIPT
Dairy industry wastewater: Low pH Nutrient Remediation .
Dr. Niall O’ Leary
AGTT
C
A
GATC
GATTTGTC
T
G
C
ACCCAG
AGGATAGAGTGA
TG
A
DEPARTMENT OF
UNIVERSITY COLLEGE CORK
Acetate
PHA
Poly-P
Glycogen + T.C.A.
e-
Ortho-PO4
Acetic Acid
ATP
(a) Anaerobic Phase
PHA
Poly-PGlycogen
Ortho-PO4
O2
CO2+H2O
ATP
(b) Aerobic Phase
Conventional Biological Phosphorus RemovalConventional Biological Phosphorus Removal
Problems:
• Requires anaerobic/aerobic cycling• Requires readily utilisable C sources• Instability:- prone to spontaneous failure• Competition by glycogen accumulators
Acid shock induced approachMicrobial Survival response => diversity, Aerobic, Non-C source dependent, Non competitive
Sequencing batch reactors2L working volume
Hydraulic retention time: 10hrsMixed Liquor Suspended Solids: 6mg/L
Temp: ~21oCpH: 5.5 – 6.1
Waste source: Dairy Ingredients processing plant: Casein and whey products; diverse carbohydrate, protein and lipid components
(High season effluent: COD:2000mg/L, PO4:- 55mg/L, NH4-N:- 60mg/L)
0
10
20
30
40
50
60
11/0
6/200
7
18/06/2
007
25/06/2
007
02/07/2
007
09/07/2
007
16/07/2
007
23/07/2
007
30/07/2
007
06/08/2
007
13/08/2
007
20/08/2
007
27/08/2
007
03/09/2
007
10/09/2
007
17/09/2
007
24/09/2
007
0
50
100
150
200
250
300
350
400
450
500
PO4
NH4
NO3
pH
MLSS
SRT
COD
2000/100/251500/75/25
pH
SRT
PO4 Removal
65-80mg/L
(pH 7.5)
(pH 5.5)
Email: [email protected] Telephone: 00-353-(0)21-4901972Fax: 00-353-(0)21-4901932
Environmental Research Institute,University College Cork, Lee Road, Cork city