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Physical and biological performance of self-inoculated UASB reactor treating raw domestic sewage

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Abstract
The dynamics of a self-inoculated upflow anaerobic sludge blanket (UASB) reactor treating raw sewage has been studied. The results suggest two types of start-up periods. During the first 6 weeks of operation, the reactor achieved a removal efficiency of up to 65% of total chemical oxygen demand (COD) and 73% of suspended solids. During this primary start-up period, the removal of organic matter was mainly due to interception in the reactor. The second start-up period expressed by biogas release was reached after 14 weeks. An intermediary period between these two start-up periods was characterized by a slight drop of pH and increase of volatile fatty acid in the effluent. The long time to reach the second start-up period seemed to be responsible for the large discrepancy between removed COD and recovered biogas (107 mL/g COD removed). it is thus suggested that process optimization should focus on shortening the time needed to reach the second start-up period. A model that represents a possible description of the process dynamics of self-inoculated UASB reactors is proposed.
Keywords
ANAEROBIC TREATMENT, WASTE-WATER

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Chicago
Kalogo, Y, JH MBouche, and Willy Verstraete. 2001. “Physical and Biological Performance of Self-inoculated UASB Reactor Treating Raw Domestic Sewage.” Journal of Environmental Engineering-asce 127 (2): 179–183.
APA
Kalogo, Y, MBouche, J., & Verstraete, W. (2001). Physical and biological performance of self-inoculated UASB reactor treating raw domestic sewage. JOURNAL OF ENVIRONMENTAL ENGINEERING-ASCE, 127(2), 179–183.
Vancouver
1.
Kalogo Y, MBouche J, Verstraete W. Physical and biological performance of self-inoculated UASB reactor treating raw domestic sewage. JOURNAL OF ENVIRONMENTAL ENGINEERING-ASCE. 2001;127(2):179–83.
MLA
Kalogo, Y, JH MBouche, and Willy Verstraete. “Physical and Biological Performance of Self-inoculated UASB Reactor Treating Raw Domestic Sewage.” JOURNAL OF ENVIRONMENTAL ENGINEERING-ASCE 127.2 (2001): 179–183. Print.
@article{147451,
  abstract     = {The dynamics of a self-inoculated upflow anaerobic sludge blanket (UASB) reactor treating raw sewage has been studied. The results suggest two types of start-up periods. During the first 6 weeks of operation, the reactor achieved a removal efficiency of up to 65\% of total chemical oxygen demand (COD) and 73\% of suspended solids. During this primary start-up period, the removal of organic matter was mainly due to interception in the reactor. The second start-up period expressed by biogas release was reached after 14 weeks. An intermediary period between these two start-up periods was characterized by a slight drop of pH and increase of volatile fatty acid in the effluent. The long time to reach the second start-up period seemed to be responsible for the large discrepancy between removed COD and recovered biogas (107 mL/g COD removed). it is thus suggested that process optimization should focus on shortening the time needed to reach the second start-up period. A model that represents a possible description of the process dynamics of self-inoculated UASB reactors is proposed.},
  author       = {Kalogo, Y and MBouche, JH and Verstraete, Willy},
  issn         = {0733-9372},
  journal      = {JOURNAL OF ENVIRONMENTAL ENGINEERING-ASCE},
  language     = {eng},
  number       = {2},
  pages        = {179--183},
  title        = {Physical and biological performance of self-inoculated UASB reactor treating raw domestic sewage},
  url          = {http://dx.doi.org/10.1061/(ASCE)0733-9372(2001)127:2(179)},
  volume       = {127},
  year         = {2001},
}

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