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Primary sludge hydrolysis for biological nutrient removal

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dc.contributor.author Hatziconstantinou, GJ en
dc.contributor.author Yannakopoulos, P en
dc.contributor.author Andreadakis, A en
dc.date.accessioned 2014-03-01T02:41:15Z
dc.date.available 2014-03-01T02:41:15Z
dc.date.issued 1996 en
dc.identifier.issn 0273-1223 en
dc.identifier.uri http://hdl.handle.net/123456789/30435
dc.subject Fermenter en
dc.subject Hydrolysis en
dc.subject Nutrient removal en
dc.subject Primary sludge en
dc.subject Soluble carbon en
dc.subject.classification Engineering, Environmental en
dc.subject.classification Environmental Sciences en
dc.subject.classification Water Resources en
dc.subject.other Biological nutrient removal en
dc.subject.other Carbon source en
dc.subject.other Fermentor en
dc.subject.other Primary sedimentation en
dc.subject.other Primary sludge hydrolysis en
dc.subject.other Anaerobic digestion en
dc.subject.other Biological sewage treatment en
dc.subject.other Carbon en
dc.subject.other Chemical oxygen demand en
dc.subject.other Denitrification en
dc.subject.other Hydrolysis en
dc.subject.other Sedimentation en
dc.subject.other Solubility en
dc.subject.other Wastewater treatment en
dc.subject.other carbon en
dc.subject.other bioreactor en
dc.subject.other chemical oxygen demand en
dc.subject.other conference paper en
dc.subject.other denitrification en
dc.subject.other hydrolysis en
dc.subject.other nutrient en
dc.subject.other sediment en
dc.subject.other sludge clarification en
dc.subject.other waste water management en
dc.title Primary sludge hydrolysis for biological nutrient removal en
heal.type conferenceItem en
heal.identifier.primary 10.1016/0273-1223(96)00545-8 en
heal.identifier.secondary http://dx.doi.org/10.1016/0273-1223(96)00545-8 en
heal.language English en
heal.publicationDate 1996 en
heal.abstract Primary sludge hydrolysis can enrich primary effluent with the soluble organics which in turn can be a valuable carbon source to subsequent nutrient removal processes. By controlling hydraulic retention time and temperature it is possible to confine the anaerobic digestion of the primary sludge to the acidogenic and acetogenic phase (hydrolysis/fermentation process), and take advantage of the soluble organics produced. This paper presents the results of a research involving bench and pilot scale experiments related to primary sludge hydrolysis. The pilot scale sedimentation tank (4.10 m in diameter, 3.20 m in depth) operated over an expended period of 21 months as a conventional clarifier and following this as a fermenter unit employing sludge recirculation. Parallel to the pilot scale experiments, several batch and continuous flow bench scale experiments were conducted in order to determine the factors controlling the production of soluble organics and the effect of the tatter on the denitrification process. The conclusions drawn were that a) a soluble COD production of the order of 5-6% in terms of sludge TCOD can be expected in a batch fermenter operating with HRT congruent to 2 days at T less than or equal to 20 degrees C, b) in a continuous flow fermenter, combinations of T > 20 degrees C and SRT > 2 should be applied in order to achieve a production of the order of 10%, c) significant soluble carbon production can be achieved in primary sedimentation tanks (over 30% in terms of influent SCOD) when relatively increased SRTs (4 to 5 days) in combination with sludge recirculation are employed, under T > 22 degrees C, and d) increased denitrification performance of the order of 9 mgNOx/g MLSS.hr, can be achieved with hydrolysate as a carbon source. Copyright (C) 1996 IAWQ. en
heal.publisher PERGAMON-ELSEVIER SCIENCE LTD en
heal.journalName Water Science and Technology en
dc.identifier.doi 10.1016/0273-1223(96)00545-8 en
dc.identifier.isi ISI:A1996VK96000052 en
dc.identifier.volume 34 en
dc.identifier.issue 1-2 -2 pt 1 en
dc.identifier.spage 417 en
dc.identifier.epage 423 en


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