Combined biological and physico-chemical treatment of filtered pig manure wastewater : pilot investigations

S. Kalyuzhnyi, V. Sklyar, A. Epov, I. Archipchenko, I. Barboulina, O. Orlova, A. Klapwijk

Research output: Contribution to journalArticleAcademicpeer-review

14 Citations (Scopus)

Abstract

Combined biological and physico-chemical treatment of filtered pig manure wastewater has been investigated on the pilot installation operated under ambient temperatures (15-20°C) and included: i) UASB-reactor for elimination of major part of COD from the filtrate; (ii) stripper of CO2 fluidised bed crystallisator for phosphate (and partially ammonia) removal from the anaerobic effluents in the form of insoluble minerals - struvite (MgNH4PO4) and hydroxyapatite (Ca5(PO4)3OH); (iii) aerobic-anoxic biofilter for polishing the final effluent (elimination of remaining BOD and nutrients). Under overall hydraulic retention time (HRT) for the system of 7.8 days, the total COD, inorganic nitrogen and total phosphorous removals were 88, 65 and 74°respectively. A decrease of the overall HRT to 4.25 days led to 91, 37 and 82␛emovals for total COD, inorganic nitrogen and total phosphorus removals, respectively. The approaches for further improvement of effluent quality are discussed.
Original languageEnglish
Pages (from-to)79-87
JournalWater Science and Technology
Volume45
Issue number12
DOIs
Publication statusPublished - 2002

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