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Ammonia removal from anaerobically digested dairy manure by struvite precipitation

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dc.contributor.author Uludağ Demirer, Sibel
dc.contributor.author Demirer, G. N.
dc.contributor.author Chen, S.
dc.date.accessioned 2020-04-15T21:47:49Z
dc.date.available 2020-04-15T21:47:49Z
dc.date.issued 2005-12
dc.identifier.citation Uludag-Demirer, S.; Demirer, G.N.; Chen, S., "Ammonia removal from anaerobically digested dairy manure by struvite precipitation", Process Biochemistry, Vol.40, No.12, pp.3667-3674, (2005). tr_TR
dc.identifier.issn 1359-5113
dc.identifier.uri http://hdl.handle.net/20.500.12416/3188
dc.description.abstract Ammonia is one of the most important contaminants impairing the quality of water resources. When this is considered along with the fact that the global demand for nitrogenous fertilizers is in constant rise, the need for recovery as well as removal of nitrogen is well justified. Crystallization of N and P in the form of struvite (MgNH4PO4 center dot 6H(2)O), which is a slow releasing and valuable fertilizer, is one possible technique for this purpose. This study investigated the removal of NR4+ through struvite precipitation from the effluents of one- (R1) and two-phase (R2) anaerobic reactors digesting dairy manure. To force the formation of struvite in the anaerobic reactor effluents, Ma(2+) ion was added by using both Mg(OH)(2) and MgCl2 center dot 6H(2)O. To prevent the effect of different total phosphorus (TP) concentration in the effluents of RI and R2, as well as to not limit the formation of struvite, an excess amount Of PO43- (0.14 M) was added in the form of NaHPO4. Different stoichiometric Mg2+:NH4+:PO43- ratios were tested to determine the required Mg2+ concentrations for maximum NH4+ removal by keeping NH4+:PO43- ratio constant for the effluents of reactors RI and R2. The results revealed that very high NH4+ removal efficiencies (above 95%) were possible by adding Mg 21 ions higher than 0.06 M concentration in the effluents from reactors RI and R2. It was also observed that the initial pH adjustment to 8.50 using NaOH did not result in any significant increase in the removal of NH4+ and the removal of NH4+ in the reactors treated with MgCl2 center dot 6H(2)O was higher than those treated with Mg(OH)(2) for the same Mg2+ concentration. tr_TR
dc.language.iso eng tr_TR
dc.publisher Elsevier Science LTD tr_TR
dc.relation.isversionof 10.1016/j.procbio.2005.02.028 tr_TR
dc.rights info:eu-repo/semantics/closedAccess tr_TR
dc.subject Ammonia Nitrogen tr_TR
dc.subject Struvite tr_TR
dc.subject Anaerobic Digestion tr_TR
dc.subject Dairy Manure tr_TR
dc.title Ammonia removal from anaerobically digested dairy manure by struvite precipitation tr_TR
dc.type article tr_TR
dc.relation.journal Process Biochemistry tr_TR
dc.identifier.volume 40 tr_TR
dc.identifier.issue 12 tr_TR
dc.identifier.startpage 3667 tr_TR
dc.identifier.endpage 3674 tr_TR
dc.contributor.department Çankaya Üniversitesi, Mühendislik Fakültesi, Endüstri Mühendisliği Bölümü tr_TR


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