CA2238581A1 - Method for the enhancement of granulation of anaerobic sludge - Google Patents
Method for the enhancement of granulation of anaerobic sludge Download PDFInfo
- Publication number
- CA2238581A1 CA2238581A1 CA 2238581 CA2238581A CA2238581A1 CA 2238581 A1 CA2238581 A1 CA 2238581A1 CA 2238581 CA2238581 CA 2238581 CA 2238581 A CA2238581 A CA 2238581A CA 2238581 A1 CA2238581 A1 CA 2238581A1
- Authority
- CA
- Canada
- Prior art keywords
- polymer
- sludge
- reactors
- polymers
- granulation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- Y02W10/12—
Landscapes
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention disclosed relates to a method for enhancing the granulation rate of suspended anaerobic sludge. The method comprises the incremental additions to the sludge over a period of time of a cationic synthetic e.g.
polyacrylamide polymer or a natural e.g. chitosan polymer. The method was performed in laboratory-scale upflow anaerobic sludge bed (UASB)-like reactors operated under similar conditions over a period of 5 weeks. A total of 4 injections was carried out, during the entire course of this study. The results showed that supplementation of the reactors with polymers, either the natural or the synthetic, enhanced the granulation compared to that in the control reactors (without the use of polymers). The polymers did not cause any inhibition to biomass activity. Furthermore, the granules specific activities were enhanced in the reactors supplemented with both polymers compared to those in the control reactors.
polyacrylamide polymer or a natural e.g. chitosan polymer. The method was performed in laboratory-scale upflow anaerobic sludge bed (UASB)-like reactors operated under similar conditions over a period of 5 weeks. A total of 4 injections was carried out, during the entire course of this study. The results showed that supplementation of the reactors with polymers, either the natural or the synthetic, enhanced the granulation compared to that in the control reactors (without the use of polymers). The polymers did not cause any inhibition to biomass activity. Furthermore, the granules specific activities were enhanced in the reactors supplemented with both polymers compared to those in the control reactors.
Claims (20)
1. A method for enhancing the granulation rate of anaerobic sludge suspended in water in a bioreactor, comprising the incremental addition to the suspended sludge of a suitable polymer over a period of time, whereby the rate of granulation of the sludge is enhanced.
2. A method according to Claim 1, wherein the polymer is selected from cationic natural and synthetic polymers.
3. A method according to Claim 2, wherein the polymer is a polysaccharide.
4. A method according to Claim 2, wherein the polymer is chitosan.
5. A method according to Claim 2, wherein the polymer is polyacrylamide.
6. A method according to Claim 2, wherein a carbon source is present.
7. A method according to Claim 4, wherein the pH is from 4 to 6.7.
8. A method according to Claim 4, wherein the pH is about 6.7.
9. A method according to Claim 6, wherein four weekly incremental additions of polymer are effected over a five week period.
10. A method according to Claim 6, wherein the polymer is chitosan and the incremental additions are about 25 mg/g of suspended sludge.
11. A method according to Claim 6, wherein the polymer is polyacrylamide and the incremental additions are about 2 mg/g of suspended sludge.
12. A method according to Claim 6, wherein the sludge is a biomass from wastewater.
13. A method according to Claim 12, wherein the wastewater includes trace metals.
14. A method according to Claim 6, wherein the bioreactor is an upflow anaerobic bed reactor.
15. A method according to Claim 9, wherein after each incremental addition of polymer, the suspension is agitated.
16. A method according to Claim 15, wherein initially the agitation is at a high rate for about one minute, followed by a low agitation rate for about three minutes.
17. A method according to Claim 6, wherein the method is continuous.
18. A method according to Claim 6, wherein the carbon source comprises ethanol and sucrose.
19. A method according to Claim 1, wherein the polymer is a synthetic polymer of molecular weight of 1-8 x 10 6 g/mol.
20. A method according to Claim 1, wherein the polymer is a natural polymer having a molecular weight of 0.5-2 x 10 6 g/mol.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US4748097P | 1997-05-23 | 1997-05-23 | |
| US60/047,480 | 1997-05-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2238581A1 true CA2238581A1 (en) | 1998-11-23 |
Family
ID=21949229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2238581 Abandoned CA2238581A1 (en) | 1997-05-23 | 1998-05-22 | Method for the enhancement of granulation of anaerobic sludge |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2238581A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109734202A (en) * | 2019-03-12 | 2019-05-10 | 山鹰国际控股股份公司 | A method of judgement and processing anaerobic grain sludge poisoning |
-
1998
- 1998-05-22 CA CA 2238581 patent/CA2238581A1/en not_active Abandoned
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109734202A (en) * | 2019-03-12 | 2019-05-10 | 山鹰国际控股股份公司 | A method of judgement and processing anaerobic grain sludge poisoning |
| CN109734202B (en) * | 2019-03-12 | 2020-03-17 | 山鹰国际控股股份公司 | Method for judging and treating anaerobic granular sludge poisoning |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |