The samples tested were from a hog feeding operation that uses a pull plug and flush system. The water supply for the barn is from the anaerobic lagoon. The house holds the water for 7-10 days. Lagoon waste is more difficult to treat than fresh water with litter, but suited to the treatment process.
The test objective was to obtain clarified water, remove excess solids, and lower the nutrient concentrations.
CONCLUSION
The EC process provides some benefit for the treated waste. Phosphate levels were reduced by ~77% and TKN levels were reduced by ~24%. Further reductions in the phosphate and nitrogen levels may be realized by forcing the formation of struvite (magnesium ammonium phosphate hexahydrate) through the process.
The waste is amenable to treatment by the EC process and an on-site pilot study would provide the opportunity for further data acquisition and tuning of the process to achieve the treatment goals for this type waste as well as other confined animal feeding operations.
(NOTE: Previous testing with fresh waste generated clear water with some yellow color and sharply rising, separable solids.)
BENCH SCALE KASELCO ELECTROCOAGULATION TREATMENT
Test #1:
The waste was processed in a type 07 reactor using normal procedures. There was little visible change in the waste except for gassing and foaming. The pH rose slowly, ending at 8.61 after three passes through the reactor. The clarity was improved but not adequate, so the test was halted.
Test #2:
The test was repeated in a type 07 reactor set up for circulating flow. The water was pumped in at 50% scale rate with 1500ml/min circulated from the top of the reactor to the bottom. This extends the residence time and treatment, and represents operation of a circulating full-scale reactor. There was a considerable improvement in turbidity at midway of the second pass (2A). Samples and photos (provided separately) were taken at this point. The Turbidity remained at 719FAU (Formazin Attenuation Units), with clear water measuring 100FAU. The water retained a yellow-green color, but formed a separable floc that settled well.
Test #3:
Test #2 was repeated to obtain a sample for off-site testing of Total Kjeldahl Nitrogen. The TKN was lowered from 1,736mg/l in the original sample to 1,288mg/l. Phosphorous was lowered from 693mg/l to 160mg/l.
LAB DATA
HOG WASTE – F-W SAMPLE (fresh waste)
TEST # 1 (as is)
PROFILE: pH 7.62.Conductivity 14,360μS. Appearance is black water. Run in #07 steel reactor.
COMMENTS: 1-A through 3-A black water. 3-B Light green water sinking dark green floc.
TEST # 2 circulating reactor. Run 07 reactor 50% speed with 1500ml/min circulation.
COMMENTS: 1-A black water black sediment. 1-B dark green water dark green floc. 2-A light green water sinking green floc.
TEST # 3 Repeat of test # 2 sent to B-environmental for TKN testing.
OUTSIDE TESTING 09-16-02
GLOSSARY and NOTES
• Profile: The characteristics of the waste being tested.
• Range Percent: Bench scale rectifier control setting.
• 1A: Equivalent of half a pass through a full-scale production reactor.
• 1B: Equivalent of one full pass through a full-scale production reactor.
• 2A: Equivalent of one-and-one-half pass through a full-scale production reactor.
• 2B: Equivalent of two full passes through a full-scale production reactor.
• A half pass is not physically possible in a full-scale production reactor but gives the technician an indication of what is happening in the process and could point to the need for multiple passes (i.e. circulation).
• Type: KASELCO EC reactors come in three electrical configurations and is chosen based on the wastewater’s conductivity.
Electrocoagulation and other
wastewater treatment technologies
Page 1 of 2
World-Class People; World-Class Products; Cleaning the World’s Water
KASELCO
959 Highway 95 North
(P.O. Box 667)
Shiner, TX 77984
Phone: 361/594-3327
Toll Free: 888/527-3526 Fax: 361/594-2596
www.KASELCO.com
For Example…
Wastewater Treatability Evaluation Industry: Confined Animal - Hog
Target(s): Phosphates
Turbidity
TKN
BACKGROUND
The samples tested were from a hog feeding operation that uses a pull plug and flush system. The water
supply for the barn is from the anaerobic lagoon. The house holds the water for 7-10 days. Lagoon waste is
more difficult to treat than fresh water with litter, but suited to the treatment process.
The test objective was to obtain clarified water, remove excess solids, and lower the nutrient concentrations.
CONCLUSION
The EC process provides some benefit for the treated waste. Phosphate levels were reduced by ~77% and
TKN levels were reduced by ~24%. Further reductions in the phosphate and nitrogen levels may be realized
by forcing the formation of struvite (magnesium ammonium phosphate hexahydrate) through the process.
The waste is amenable to treatment by the EC process and an on-site pilot study would provide the
opportunity for further data acquisition and tuning of the process to achieve the treatment goals for this type
waste as well as other confined animal feeding operations.
(NOTE: Previous testing with fresh waste generated clear water with some yellow color and sharply rising,
separable solids.)
BENCH SCALE KASELCO ELECTROCOAGULATION TREATMENT
Test #1:
The waste was processed in a type 07 reactor using normal procedures. There was little visible change in
the waste except for gassing and foaming. The pH rose slowly, ending at 8.61 after three passes through the
reactor. The clarity was improved but not adequate, so the test was halted.
Test #2:
The test was repeated in a type 07 reactor set up for circulating flow. The water was pumped in at 50% scale
rate with 1500ml/min circulated from the top of the reactor to the bottom. This extends the residence time
and treatment, and represents operation of a circulating full-scale reactor. There was a considerable
improvement in turbidity at midway of the second pass (2A). Samples and photos (provided separately) were
taken at this point. The Turbidity remained at 719FAU (Formazin Attenuation Units), with clear water
measuring 100FAU. The water retained a yellow-green color, but formed a separable floc that settled well.
For Example…
Wastewater Treatment Evaluation
Page 2 of 2
World-Class People; World-Class Products; Cleaning the World’s Water
Test #3:
Test #2 was repeated to obtain a sample for off-site testing of Total Kjeldahl Nitrogen. The TKN was lowered
from 1,736mg/l in the original sample to 1,288mg/l. Phosphorous was lowered from 693mg/l to 160mg/l.
LAB DATA
HOG WASTE – F-W SAMPLE (fresh waste)
TEST # 1 (as is)
PROFILE: pH 7.62.Conductivity 14,360μS. Appearance is black water. Run in #07 steel reactor.
PASS PH COND AMPS VOLTS %
1-A 7.69 13,600 4 36 100
1-B 8.15 13,690 4 30 80
2-A 8.34 13,160 4 30 80
2-B 8.45 12,410 4 30 80
3-A 8.55 12,610 4 28 76
3-B 8.61 12,090 4 28 76
COMMENTS: 1-A through 3-A black water. 3-B Light green water sinking dark green floc.
TEST # 2 circulating reactor. Run 07 reactor 50% speed with 1500ml/min circulation.
PASS PH COND AMPS VOLTS %
1-A 8.40 12,840 4 30 80
1-B 8.58 12,080 4 32 84
2-A 8.52 12,660 4 31 78
PASS TURBIDITY PO4
PROFILE 3,421 692.5
1-A >4,400 329
1-B 3,188 261
2-A 719 160
COMMENTS: 1-A black water black sediment. 1-B dark green water dark green floc. 2-A light green water
sinking green floc.
TEST # 3 Repeat of test # 2 sent to B-environmental for TKN testing.
OUTSIDE TESTING 09-16-02
PASS TKN
PROFILE 1,736
2-A 1,288
GLOSSARY and NOTES
• Profile: The characteristics of the waste being tested.
• Range Percent: Bench scale rectifier control setting.
• 1A: Equivalent of half a pass through a full-scale production reactor.
• 1B: Equivalent of one full pass through a full-scale production reactor.
• 2A: Equivalent of one-and-one-half pass through a full-scale production reactor.
• 2B: Equivalent of two full passes through a full-scale production reactor.
• A half pass is not physically possible in a full-scale production reactor but gives the technician an indication of what is happening in
the process and could point to the need for multiple passes (i.e. circulation).
• Type: KASELCO EC reactors come in three electrical configurations and is chosen based on the wastewater’s conductivity.
case 091302 CAFO hog
