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  • 1
    Electronic Resource
    Electronic Resource
    Algal polymorphism in high rate wastewater treatment ponds (1981)
    Springer
    Hydrobiologia 77 (1981), S. 167-175 
    Details
    ISSN: 1573-5117
    Keywords: Algal Polymorphism ; Wastewater ; High Rate Algae Ponds
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In the past as well as today there have been two conflicting opinions as to whether changes in the algal species in water bodies indicate polymorphism or the development of separate species. Similar changes were also found in High Rade Algae Pond (HRAP) used for wastewater treatment, effluent reclamation and protein production. To critically examine both opinions, samples of HRAP effluent were taken and the algal species identified and measured continuously, using conventional methods. Two main algal species were identified. These remained stable during all four monitoring sessions over a three-year period. The external changes observed in the algae were a reflection of controlled periods of organic loading and the conditions under which the pond was operated, such as retention time (a dependant of radiation), ambient temperature, effluent depth and aeration methods.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00008876
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Growth of Spirulina maxima on cow-manure wastes (1979)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 21 (1979), S. 2169-2173 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Experiments were carried out on culturing the blue-green alga Spirulina maxima on raw cow-manure wastes in an outdoor pond. Improved growth was obtained at pH above 9.2 and temperature above 32°C, with half the radiation intensity required for other green algal species. A yield of 3 g/liter, in terms of total suspended matter, was achieved. The main advantage of this method is that S. maxima removes nutrients and thus serves as an alternative protein source.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260211203
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Environmental phenotypic variation of Scenedesmus dimorphus in high-rate algae ponds and its relationship to wastewater treatment and biomass production (1981)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 23 (1981), S. 2185-2198 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: During the course of operating high-rate algae ponds (HRAP) for wastewater treatment and protein production, changes were found in the two main algae species. The observed changes were interpreted to be a reflection of the operation regime and loading combined with environmental conditions. To verify that these changes were phenotypic and not genetic, experiments were conducted on Scenedesmus dimorphus growing in miniponds (110 L) as well as in the laboratory. The results showed that the changes in S. dimorphus were external and due to the changes in the loading and operating conditions of the ponds adjusted to changing environmental conditions. It was found that wastewater treatment efficiency and algal yield are also correlated with the S. dimorphus type.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260231003
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    Paper (German National Licenses)
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