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Effects of Pre-aeration on the Anaerobic Digestion of Sewage Sludge
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  • Journal title : Environmental Engineering Research
  • Volume 19, Issue 1,  2014, pp.59-66
  • Publisher : Korean Society of Environmental Engineering
  • DOI : 10.4491/eer.2014.19.1.059
 Title & Authors
Effects of Pre-aeration on the Anaerobic Digestion of Sewage Sludge
Ahn, Young-Mi; Wi, Jun; Park, Jin-Kyu; Higuchi, Sotaro; Lee, Nam-Hoon;
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 Abstract
The aim of this study was to assess the effect of pre-aeration on sludge solubilization and the behaviors of nitrogen, dissolved sulfide, sulfate, and siloxane. The results of this study showed that soluble chemical oxygen demand in sewage sludge could be increased through pre-aeration. The pre-aeration process resulted in a higher methane yield compared to the anaerobic condition (blank). The pre-aeration of sewage sludge, therefore, was shown to be an effective method for enhancing the digestibility of the sewage sludge. In addition, this result confirms that the pre-aeration of sewage sludge prior to its anaerobic digestion accelerates the growth of methanogenic bacteria. Removal rates for -N and T-N increased simultaneously during pre-aeration, indicating simultaneous nitrification and denitrification. The siloxane concentration in sewage sludge decreased by 40% after 96 hr of pre-aeration; in contrast, the sulfide concentration in sewage sludge did not change. Therefore, pre-aeration can be employed as an efficient treatment option to achieve higher methane yield and lower siloxane concentration in sewage sludge. In addition, reduction of nitrogen loading by pre-aeration can reduce operating costs to achieve better effluent water quality in wastewater treatment plant and benefit the anaerobic process by minimizing the toxic effect of ammonia.
 Keywords
Anaerobic digestion;Pre-aeration;Sewage sludge;Siloxane;Solubilization;
 Language
English
 Cited by
1.
Effect of aerobic pre-treatment on hydrogen and methane production in a two-stage anaerobic digestion process using food waste with different compositions, Waste Management, 2016  crossref(new windwow)
2.
Effect of Volatile Fatty Acid Concentration on Anaerobic Degradation Rate from Field Anaerobic Digestion Facilities Treating Food Waste Leachate in South Korea, Journal of Chemistry, 2015, 2015, 1  crossref(new windwow)
3.
Oxygen tolerance capacity of upflow anaerobic solid-state (UASS) with anaerobic filter (AF) system, Journal of Environmental Sciences, 2016, 45, 200  crossref(new windwow)
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