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THE MONITORING OF AEROBIC FLOC-LIKE SLUDGE INFLUENCED BY CALCIUM IONS
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  • Journal title : Environmental Engineering Research
  • Volume 11, Issue 3,  2006, pp.127-133
  • Publisher : Korean Society of Environmental Engineering
  • DOI : 10.4491/eer.2006.11.3.127
 Title & Authors
THE MONITORING OF AEROBIC FLOC-LIKE SLUDGE INFLUENCED BY CALCIUM IONS
Yoon, Young H.; Park, Jae-Ro; Kim, In-S.;
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 Abstract
Aerobic floc-like sludge was formed in a batch reactor and the effect of cations on the formation of aerobic floc-like sludge was studied. In order to enhance the formation (rate) of aerobic floc-like sludge, cations such as , , , and were added to the seed sludge. It was found that had positive effect on the formation of floc-like sludge, as measured by sludge volume index (SVI) for settle ability. The formation of floc-like sludge was confirmed by the microscopic observation after DAPI staining. The scattered forms of sludge samples at the initial stage became aggregated to form floes after addition. To ensure the functions of sludge floes in a treatment plant, the gradient of ionic species around the surfaces of floc-like sludge was monitored by ion selective microelectrodes for , and pH. The effective concentration of ion to form floc-like sludge was determined to be 750 mg/L (0.15 mg MLSS). Under the effective condition, the SVI value was the lowest and large distribution of nitrifying bacteria at the outer surface was observed in the aerobic floc-like sludge. From the results, it was found that the calcium ion functioned as an agent for the formation of aerobic floc-like sludge, resulting in the enhanced nitrification.
 Keywords
Aerobic floc-like sludge;Calcium ion;Ion-selective microelectrodes (ISEs);Sludge volume index(SVI);
 Language
English
 Cited by
1.
A review of the upflow anaerobic sludge blanket reactor, Desalination and Water Treatment, 2014, 52, 22-24, 4122  crossref(new windwow)
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