GB1496346A - Production of algal biopolymers - Google Patents

Production of algal biopolymers

Info

Publication number
GB1496346A
GB1496346A GB52398/74A GB5239874A GB1496346A GB 1496346 A GB1496346 A GB 1496346A GB 52398/74 A GB52398/74 A GB 52398/74A GB 5239874 A GB5239874 A GB 5239874A GB 1496346 A GB1496346 A GB 1496346A
Authority
GB
United Kingdom
Prior art keywords
biopolymers
algal
nitrogen
weight
soil
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
Application number
GB52398/74A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
American Bioculture Inc
Original Assignee
American Bioculture Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by American Bioculture Inc filed Critical American Bioculture Inc
Publication of GB1496346A publication Critical patent/GB1496346A/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G33/00—Cultivation of seaweed or algae
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5263—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using natural chemical compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
    • Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/30—Wastewater or sewage treatment systems using renewable energies
    • Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/40—Valorisation of by-products of wastewater, sewage or sludge processing

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Biotechnology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Environmental Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Botany (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Marine Sciences & Fisheries (AREA)
  • General Chemical & Material Sciences (AREA)
  • Micro-Organisms Or Cultivation Processes Thereof (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)
  • Soil Conditioners And Soil-Stabilizing Materials (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Apparatus Associated With Microorganisms And Enzymes (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Abstract

1496346 Soil improvement with biopolymers; purifying water AMERICAN BIOCULTURE Inc 4 Dec 1974 [4 Dec 1973] 52398/74 Headings C1B and C1C [Also in Divisions C3 and C6] Biopolymers exhibiting flocculating activity useful in coagulating solids in aqueous dispersion and in improving soil quality are prepared by cultivating unicellular green and/or non-nitrogen-fixing blue-green algae in the presence of light and in a nitrogen-deficient nutrient medium supplied with a carbon source, the nitrogen deficiency in the medium being of an order sufficient to induce the formation of the desired biopolymers, e.g. giving an algal cell nitrogen content of less than 5% by weight of the dry cell. The polymers are ethanol precipitable, include polysaccharides (anthrone reaction), are not protein in nature and have a M.W. of approx. 100,000 daltons. They are primarily extra-cellular metabolites. For coagulating, from 100 to 1000 parts by weight of the polymer is employed for every million parts of dispersed solids. For improving soil quality, I part by weight of polymer is used with 1000-5000 parts by weight of soil to form water-stable aggregates. The algae may be first cultivated to a population density of 10<SP>7</SP>-10<SP>8</SP> cells/ml. of culture under conditions which are not nitrogen deficient and thereafter the algal culture (or part thereof), after dilution and transference to a second culture vessel, is further cultivated under conditions of increasing nitrogen deficiency starting from a nitrogen content of not more than 5% by weight of the dry cell. Preferred algal species are Chlorella pyrenoidosa and Chlamydomonas mexicana. In Example 5 the flocculating activity of the algal biopolymers is compared with that of polystyrene sulphonate, using aqueous dispersions of kaolin. Example 6 relates to the flocculation of screened effluent of sewage using the algal biopolymers and lime (pH 10-11). Examples 7 and 8 are directed to the production of water-stable aggregates of a dry calcareous soil (20% clay, 53% silt and 27% sand) with the aid of the biopolymers and of the improved quality of soil plots subsequent to their treatment with the biopolymers, respectively.
GB52398/74A 1973-12-04 1974-12-04 Production of algal biopolymers Expired GB1496346A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US42152773A 1973-12-04 1973-12-04

Publications (1)

Publication Number Publication Date
GB1496346A true GB1496346A (en) 1977-12-30

Family

ID=23670908

Family Applications (1)

Application Number Title Priority Date Filing Date
GB52398/74A Expired GB1496346A (en) 1973-12-04 1974-12-04 Production of algal biopolymers

Country Status (13)

Country Link
JP (1) JPS50105880A (en)
AU (1) AU510007B2 (en)
BE (1) BE822947A (en)
BR (1) BR7410082A (en)
CA (1) CA1040122A (en)
DE (1) DE2457325A1 (en)
ES (1) ES432537A1 (en)
FR (1) FR2253091B3 (en)
GB (1) GB1496346A (en)
IL (1) IL46188A0 (en)
IT (1) IT1026745B (en)
NL (1) NL7415821A (en)
ZA (1) ZA747631B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2155002A (en) * 1984-01-12 1985-09-18 Hartley Simon Ltd Flocculating agent

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2155002A (en) * 1984-01-12 1985-09-18 Hartley Simon Ltd Flocculating agent

Also Published As

Publication number Publication date
FR2253091B3 (en) 1977-08-26
AU7595074A (en) 1976-06-03
BE822947A (en) 1975-04-01
FR2253091A1 (en) 1975-06-27
BR7410082A (en) 1976-06-08
JPS50105880A (en) 1975-08-20
AU510007B2 (en) 1980-06-05
IT1026745B (en) 1978-10-20
CA1040122A (en) 1978-10-10
ZA747631B (en) 1975-12-31
DE2457325A1 (en) 1975-06-05
NL7415821A (en) 1975-06-06
ES432537A1 (en) 1977-01-01
IL46188A0 (en) 1975-03-13

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee