CA1071338A - Treatment of cellular material - Google Patents
Treatment of cellular materialInfo
- Publication number
- CA1071338A CA1071338A CA254,714A CA254714A CA1071338A CA 1071338 A CA1071338 A CA 1071338A CA 254714 A CA254714 A CA 254714A CA 1071338 A CA1071338 A CA 1071338A
- Authority
- CA
- Canada
- Prior art keywords
- sludge
- cellular material
- lysis
- treatment
- proportion
- 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.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/18—Treatment of sludge; Devices therefor by thermal conditioning
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N1/00—Microorganisms, e.g. protozoa; Compositions thereof; Processes of propagating, maintaining or preserving microorganisms or compositions thereof; Processes of preparing or isolating a composition containing a microorganism; Culture media therefor
- C12N1/06—Lysis of microorganisms
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Water Supply & Treatment (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Zoology (AREA)
- Thermal Sciences (AREA)
- Biotechnology (AREA)
- Physics & Mathematics (AREA)
- Wood Science & Technology (AREA)
- Genetics & Genomics (AREA)
- Medicinal Chemistry (AREA)
- Biomedical Technology (AREA)
- Virology (AREA)
- Microbiology (AREA)
- Tropical Medicine & Parasitology (AREA)
- Mycology (AREA)
- Biochemistry (AREA)
- General Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Enzymes And Modification Thereof (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A method of treating cellular material, e.g. the surplus sludge from a fermenter, in which the cellular material is subjected to conditions which cause cell lysis thereby enabling at least a proportion of the lysis products to enter solution. Lysis can be caused by subjecting the cellular material to alkaline conditions.
A method of treating cellular material, e.g. the surplus sludge from a fermenter, in which the cellular material is subjected to conditions which cause cell lysis thereby enabling at least a proportion of the lysis products to enter solution. Lysis can be caused by subjecting the cellular material to alkaline conditions.
Description
~7~338 T~IS INVE~TIQN RELAqæS to a method for the treatment of cellular material and in particular to a method for the treatment of surplus microbi31 solids resultIng fYom the feD~entatian of wastewater.
In the biological treatm~nt of wastewater by an aeration process ~uch as the activated sludg~ proces~ there i~ a net produ~tion of microbi~l solid~. ~h0 8tream leavins this tre~t~ent ~tage passes to another staga for removal of su~pended solids before di~charge. The bulk of these solid~ in the fo~m of a ~lu~Be i8 reeycled to the aeratio~ stage while the ~urplus ~luage i~ re~o~ed ~or ~urther dewstaring a~d final di~po~al. D~w~tering and di~posal are oft~n di~fi~ult and Gostly.
~ ~ccordi~g to the pre~ent invention we provide a method for the treatment o~
: cellul~r material to redu~e the bulk thereof which comprises a ~tep whereLn a sludge of cellular material is subjected to condition~ whlch oau~a ly~i~ of at least a proportion of the oellular mate~ial to ~n ~xtent suf~ici~nt to allow at least a propox~ of the 1y8iB produot~ to ~ter ~oluti~n in the liguid. Ideall~ :
total ly~i~ and solu~iQn is achie~ed~
.~ ~he meth~d of the inv~ti~a i~ par~icularly ~pplicable to the treatment of the surplu~ sl~dge xesultinx ~rn~ fermentatio~ o~ ~in~le cell protein W8~t8 or ~taroh ~aste.
Idr8i8 of the cellular materi~l i8 ~uitably brou~ht about by pa88illg it into a tank ~n ~hich it i8 made alkaline, e~. by addition of sodi~am b;ydroxide solution, -~
to ~ p~I of at lea~t lû9 p~eferably in the range 11 to 12. Whil~t at thls alk~l3rLe p:EI the sludge in the ly8i8 ta~lk i8 preferably ma:lntained at a high ten~perature9 ie. at leaat 60&, e~peciallg st least 80&. S~itably the 81ud~3 i8 ~ tai~ed 25 lmd~r these C~lditiO1~18 for a period of from 1 to 24 ~ur~.
. : 2 , . . .
'' ~ , .
.,, - ~ ' .
,, !, ~ . . :
- '"
:13 27g60 1~71338 -Ihe inve~tialrl i8 illu~trated by the scco~pa~yi~ drawin~ ~hich i~ a schematio di~ of a ~rstem for treati~g e~flue¢lt. qhe d~awing ~ho~s aD aeratio3l tank or ~e~mQnter 1, a ~ettli~g ta~k 2" a ly8~8 tank 3 and a ~ther ~ettli~lg tank 4. ~e ~ther settling ta~k 4 i8 im::lude~ ~ the ayelt~m to r~ovc a~ iilert {3atariPl 5 ~mteri~ the ~t~m. If inert materi~ does not erlter th2 E;ystem ~urther ~ettli~
t~k 4 is omitted.
~ M~t froDI a plant, e6. a ~e:~tatio~ pl~t, pss~e~ alar~ lille 5 into f~aenter 1 in ~h~ch it i~ ao~ge~ted~ ~. b~r blowi~g air ~to it, a;lld oirsllla~0d to remo~ ~t of the biolo~icall5r de~ada~le ~ateri~lO ~o~ ferm~ter 1 ~n '' 10 aq~Leous ~U~e~sian of cellular nute~ial paa~es along lis~ 6 to ~ep ratic~ t~k 2.
:En separatian taDk 2 sludgs is ~ated and the ~ater is re~oved for dl chsrge .
~1~ line 7. ~ct oi~ the 8~p~rated'slndge is retu~ed to fe~e;nter 1 alo~g rec7cle line 9. ~1UB slud~ howe~ar passes on,~ line 8 i~to 1~13i8 taDk 3 i~
}~hich it i~ eoted to ¢aE~aitia~ ~rhich cauae lyai~ of the oellular material to ,~ 15 a~L erte:~t ~ficient to ca~e the ly~ia prodQcts to e~ter ~olution in the water - p~e~ent; thereby ~ubsta~ti lly e~pletely sol~bilizi~g a~y solid cellular ~aterisl praaent. ~om l~r~i8 ta~k 3 ~011ibilized ee~llulsr material pa3 e~ P~ g llrLe 10 into ~rther settling t~ 4 ~if pre~) ~d th~noe al~ line 11 in~o li~e 5 for retu~
~o ~er~enter 1. !Ch~a ~ tity o~ 8111dg~ fo:r ~ lpO5al i~l thus ~reatl~r :reduood~:
, ., ; . . . .
or even eli~nin3ted. = . ~. ... . ........... :. , .: .
,,, . , ;
- . . . . . ; ..
, . . . . , ~ ~ . ..
.. ~ - . . . . . . . .
.. . . ~ . . ~ . . , . .- .
- . . . ~. . ' .
In the biological treatm~nt of wastewater by an aeration process ~uch as the activated sludg~ proces~ there i~ a net produ~tion of microbi~l solid~. ~h0 8tream leavins this tre~t~ent ~tage passes to another staga for removal of su~pended solids before di~charge. The bulk of these solid~ in the fo~m of a ~lu~Be i8 reeycled to the aeratio~ stage while the ~urplus ~luage i~ re~o~ed ~or ~urther dewstaring a~d final di~po~al. D~w~tering and di~posal are oft~n di~fi~ult and Gostly.
~ ~ccordi~g to the pre~ent invention we provide a method for the treatment o~
: cellul~r material to redu~e the bulk thereof which comprises a ~tep whereLn a sludge of cellular material is subjected to condition~ whlch oau~a ly~i~ of at least a proportion of the oellular mate~ial to ~n ~xtent suf~ici~nt to allow at least a propox~ of the 1y8iB produot~ to ~ter ~oluti~n in the liguid. Ideall~ :
total ly~i~ and solu~iQn is achie~ed~
.~ ~he meth~d of the inv~ti~a i~ par~icularly ~pplicable to the treatment of the surplu~ sl~dge xesultinx ~rn~ fermentatio~ o~ ~in~le cell protein W8~t8 or ~taroh ~aste.
Idr8i8 of the cellular materi~l i8 ~uitably brou~ht about by pa88illg it into a tank ~n ~hich it i8 made alkaline, e~. by addition of sodi~am b;ydroxide solution, -~
to ~ p~I of at lea~t lû9 p~eferably in the range 11 to 12. Whil~t at thls alk~l3rLe p:EI the sludge in the ly8i8 ta~lk i8 preferably ma:lntained at a high ten~perature9 ie. at leaat 60&, e~peciallg st least 80&. S~itably the 81ud~3 i8 ~ tai~ed 25 lmd~r these C~lditiO1~18 for a period of from 1 to 24 ~ur~.
. : 2 , . . .
'' ~ , .
.,, - ~ ' .
,, !, ~ . . :
- '"
:13 27g60 1~71338 -Ihe inve~tialrl i8 illu~trated by the scco~pa~yi~ drawin~ ~hich i~ a schematio di~ of a ~rstem for treati~g e~flue¢lt. qhe d~awing ~ho~s aD aeratio3l tank or ~e~mQnter 1, a ~ettli~g ta~k 2" a ly8~8 tank 3 and a ~ther ~ettli~lg tank 4. ~e ~ther settling ta~k 4 i8 im::lude~ ~ the ayelt~m to r~ovc a~ iilert {3atariPl 5 ~mteri~ the ~t~m. If inert materi~ does not erlter th2 E;ystem ~urther ~ettli~
t~k 4 is omitted.
~ M~t froDI a plant, e6. a ~e:~tatio~ pl~t, pss~e~ alar~ lille 5 into f~aenter 1 in ~h~ch it i~ ao~ge~ted~ ~. b~r blowi~g air ~to it, a;lld oirsllla~0d to remo~ ~t of the biolo~icall5r de~ada~le ~ateri~lO ~o~ ferm~ter 1 ~n '' 10 aq~Leous ~U~e~sian of cellular nute~ial paa~es along lis~ 6 to ~ep ratic~ t~k 2.
:En separatian taDk 2 sludgs is ~ated and the ~ater is re~oved for dl chsrge .
~1~ line 7. ~ct oi~ the 8~p~rated'slndge is retu~ed to fe~e;nter 1 alo~g rec7cle line 9. ~1UB slud~ howe~ar passes on,~ line 8 i~to 1~13i8 taDk 3 i~
}~hich it i~ eoted to ¢aE~aitia~ ~rhich cauae lyai~ of the oellular material to ,~ 15 a~L erte:~t ~ficient to ca~e the ly~ia prodQcts to e~ter ~olution in the water - p~e~ent; thereby ~ubsta~ti lly e~pletely sol~bilizi~g a~y solid cellular ~aterisl praaent. ~om l~r~i8 ta~k 3 ~011ibilized ee~llulsr material pa3 e~ P~ g llrLe 10 into ~rther settling t~ 4 ~if pre~) ~d th~noe al~ line 11 in~o li~e 5 for retu~
~o ~er~enter 1. !Ch~a ~ tity o~ 8111dg~ fo:r ~ lpO5al i~l thus ~reatl~r :reduood~:
, ., ; . . . .
or even eli~nin3ted. = . ~. ... . ........... :. , .: .
,,, . , ;
- . . . . . ; ..
, . . . . , ~ ~ . ..
.. ~ - . . . . . . . .
.. . . ~ . . ~ . . , . .- .
- . . . ~. . ' .
Claims (3)
1. A method for the treatment of a sludge containing microbial cells resulting from the fermentation of single cell protein waste or starch waste which comprises a step wherein the sludge is maintained at a pH of at least 10 and at a tem-perature of at least 60°C for a period of from 1 to 24 hours causing lysis of at least a proportion of the microbial cells present in the sludge to an extent sufficient to allow at least a proportion of the lysis products to enter solution.
2. A method according to Claim 1 wherein the sludge of cellular material is subjected to conditions which cause total lysis of the cellular material.
3. A method according to Claim 1 wherein during the lysis step the sludge is maintained at a pH within the range 11 to 12 and at a temperature of at least 80°C for a period of from 1 to 24 hours.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB25379/75A GB1547177A (en) | 1975-06-13 | 1975-06-13 | Treatment of sludge resulting from fermentation of single cell protein waste or starch waste |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1071338A true CA1071338A (en) | 1980-02-05 |
Family
ID=10226725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA254,714A Expired CA1071338A (en) | 1975-06-13 | 1976-06-11 | Treatment of cellular material |
Country Status (4)
| Country | Link |
|---|---|
| AU (1) | AU498678B2 (en) |
| CA (1) | CA1071338A (en) |
| GB (1) | GB1547177A (en) |
| NZ (1) | NZ180922A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4601986A (en) * | 1983-07-29 | 1986-07-22 | Phillips Petroleum Company | Protein product of reduced nucleic acid content and low allergenicity |
| WO2014131134A1 (en) | 2013-03-01 | 2014-09-04 | Paradigm Environmental Technologies Inc. | Wastewater treatment process and system |
| US9145315B2 (en) | 2013-03-01 | 2015-09-29 | Paradigm Environmental Technologies Inc. | Wastewater treatment process and system |
-
1975
- 1975-06-13 GB GB25379/75A patent/GB1547177A/en not_active Expired
-
1976
- 1976-05-20 AU AU14293/76A patent/AU498678B2/en not_active Expired
- 1976-05-21 NZ NZ180922A patent/NZ180922A/en unknown
- 1976-06-11 CA CA254,714A patent/CA1071338A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4601986A (en) * | 1983-07-29 | 1986-07-22 | Phillips Petroleum Company | Protein product of reduced nucleic acid content and low allergenicity |
| WO2014131134A1 (en) | 2013-03-01 | 2014-09-04 | Paradigm Environmental Technologies Inc. | Wastewater treatment process and system |
| US9145315B2 (en) | 2013-03-01 | 2015-09-29 | Paradigm Environmental Technologies Inc. | Wastewater treatment process and system |
| CN105164060A (en) * | 2013-03-01 | 2015-12-16 | 范式环保科技股份有限公司 | Wastewater treatment process and system |
| US9809480B2 (en) | 2013-03-01 | 2017-11-07 | Cypress Technologies Limited | Wastewater treatment process and system |
Also Published As
| Publication number | Publication date |
|---|---|
| GB1547177A (en) | 1979-06-06 |
| AU498678B2 (en) | 1979-03-22 |
| NZ180922A (en) | 1978-04-28 |
| AU1429376A (en) | 1977-12-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |