Transcript Slide sem título

Folic Acid
C19H19N7O6
•A member of vitamin B-complex.
• Slightly solubility in water.
• Odorless.
• Antianemic, “food addictive “ and reproduction optimizer.
Dosfolat
(Tetrahydrofolicacid)
- The hydrosoluble form of folic acid.
- Optimizes the enzymatic metabolism of bacteria.
- Reduces the generated amount of sludge.
- Activates the ammonia nitrification.
- Ends the excessive growth of filamentous bacteria.
- Since 1983 - no similar products.
- Developed for 20 years.
- Density: 1.25 g/cm3
- pH (10.000 ppm): 6.5
- Shock dosage: 0,5 to 0,7 ppm, more often 0,5.
- Operation dosage, accordingly to COD:
up to 2000 mg/l  0,1 ppm
between 5000 and 5500  0,2 ppm
above 5500  0,3 ppm
- Increase of stalk protozoa, decrease of turbidity.
- Contains nitrogen, promoting the decrease of urea dosage.
- Dosage:
Dilution 1:100 (initial), 1:200 or 1:400 (industrial effluents,
high load or organic toxics), in distilled or demineralized
water.
Solution valid for 1 week, maximum tolerance 14 days.
Water quality testing for solution (in case of light water):
prepare a 1% solution, let it rest for 24 hours, if no
precipitation or turbidity is observed, water is apt.
- Dosage point: TQ-AR entrance (next to recycling).
Cloudiness
means poor quality
dilution water
Phases of action of Dosfolat
General summary
1. Increase of active
microorganisms
population
2. More efficient oxidation, requiring less
contact time OM / bacteria
3. Thus, we are able to raise the sludge age
4. As oxidation is faster, there is no sufficient
time for solids (biomass) increase
5. Working with regular levels of solids in the
system, high degradability and high sludge age
(IL), sludge discharge is reduced.
Experience 1
Santista Têxtil (Americana - SP)
- Beginning of tests in Jan/98. Plant characteristics:
•Flowrate (Q): 95 m3/h
•BOD2: 1100 mg/l
•COD2: 1800 mg/l (Ef removal: 85%)
•IL: 20 days
•SST3: 3400 ml/l
•Sludge Generation: 1100 kg/day (dry base)
- Main objectives:
•Increase microbiota population (observation of flocs)
•Increase efficiency in BOD/COD removal
•Reduce number of filamentous bacteria
•Decrease generation of sludge (raise IL level to 30 days)
•Decrease in color
- Operation:
•Initial dosage, or shock dosage, with duration of
15 days  0,5 mg/l (19,26 kg)
•Operational Dosage  0,2 mg/l (15,40 kg/month)
•Solution 1:400, with demineralized water
•Periodical increasing on the sludge age
1000 liters polyethylene
tank, with lid
Scheme for preparation
tank and dosage point
Dosing pump
Qr
Q
Outlet to DC
TQ-AR
6400 m3
Main Results
Microbiology: decrease of filaments, improving the settleability, reducing SVI
and presenting larger and more cohese flocs. Proliferation of stalked ciliate
protozoa was observed, indicating stability of the plant.
Color: the ETS had a history of 2410 mg/l of PtCo, we reached 574 with
stabilization at 1409 mg/l of PtCo.
SOUR (specific oxygen uptake rate): used to maintain a mean value of 10
mgO2/h/g of SSV. By the end of the essays the ETS was already working with
a SOUR of 165 mgO2/h/g of SSV.
COD removal: increase of efficiency, from 85 % to 93 %
Decrease of the generated amount of sludge:
compared to 5 days prior to the beginning of administration: 23 %
compared to the last 30 days prior to the beginning of administration: 38,7 %
compared to the last 90 days: 38 %
compared to the last 12 months: 36 %
Results
1.Increase of efficiency in COD removal
B. Decrease of final values
20 days
25 days
30 days
100
95
90
80
75
70
65
60
15
/J
an
17
/J
an
19
/J
an
21
/J
an
23
/J
an
25
/J
an
27
/J
an
29
/J
an
31
/J
an
02
/F
e
04 v
/F
ev
06
/F
ev
08
/F
e
10 v
/F
ev
12
/F
ev
14
/F
e
17 v
/F
ev
19
/F
ev
%
85
Data
Results
2. Reduction of Color
20 days
25 days
30 days
3550
3050
PtCo
2550
2050
1550
1050
550
50
ev
ev
ev
ev
ev
ev
an
an
an
an
an
an
J
J
J
J
J
J
F
F
F
F
F
F
/
/
/
/
/
/
/
/
/
/
/
/
14
17
20
23
26
29
01
04
07
10
13
17
Data
Results
3. Reduction of SVI
20 days
25 days
30 days
330
320
310
m l/g
300
290
280
270
260
250
v
v
v
v
v
v
v
v
v
n
n
n
n
n
n
n
n
n
Ja /Ja /Ja /Ja /Ja /Ja /Ja /Ja /Ja /Fe /Fe /Fe /Fe /Fe /Fe /Fe /Fe /Fe
/
14 16 18 20 22 24 26 28 30 01 03 05 07 09 11 13 16 18
Data
Results
4. Reduction of generated sludge
20 days
25 days
30 days
1200
1100
kg de lodo / dia
1000
900
800
700
600
20
21
21
23
23
23
24
24
26
Idade do Lodo
26
26
27
27
27
27
30
Microbiology
Before Application
After Application
Experience 2
Fibralin Têxtil (Itatiba - SP)
- Beginning of tests in July/98, plant characteristics:
•Flowrate (Q): 15 m3/h
•BOD2: 1800 mg/l
•COD2: 3000 mg/l (Ef of 85 %)
•IL: 14 days
•SST3: 3100 ml/l
•Sludge Generation: 675 kg/day (dry basis)
- Main Objectives:
•Increase microbiota population (observation of flocs)
•Increase efficiency in BOD/COD removal
•Reduce number of filamentous bacteria
•Decrease generation of sludge (raise IL level to 20 days)
•Decrease in color
- Operation:
•Shock dosage, with duration of 15 days  0,5
mg/l (0,24 kg/day)
•Operational dosage  0,3 mg/l (0,144 kg/d)
•Solution 1:400, with demineralized water
•Periodical increasing on the age of sludge
Sludge Reduction
After 2 years, we have observed the
following pattern of reduction:
• 3 first months: 46 %
• 6 months: 70 %
• 1 year and 5 months: 85 %
• 2 years: 99,6 %
Experience 3
Vine Têxtil S/A - F I - (Itatiba - SP)
Discharge closed in 35 days, sustained till today (18 months)
IMPORTANT OBSERVATIONS
•Never interrupt dosage: breakage of degradation cycle
•Use only demineralized or distilled water: avoid clots
•Avoid direct action of UV rays
•Basic rules of manipulation
•Don’t use metal barrels for storage of solution