Innovative process scheme for removal of organic matter, phosphorus and nitrogen from pig manure

Dimitar Borisov Karakashev, Jens Ejbye Schmidt, Irini Angelidaki

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Disposal of pig manure often requires treatment with respect to environmental legislations. In this study different processes for reduction of the organic matter (anaerobic digestion, effluent separation by decanter centrifugation, membrane microfiltration, post-digestion in upflow anaerobic sludge blanket (UASB) reactor, partial oxidation), nitrogen (oxygen-limited autotrophic nitrification-denitrification, OLAND) and phosphorus (phosphorus removal by precipitation as struvite, PRS) from pig manure were tested. Results obtained showed that microfiltration was unsuitable for pig manure treatment. PRS treated effluent was negatively affecting the further processing of the pig manure in UASB, and was therefore not included in the final process flow scheme. In a final scheme (PIGMAN concept) combination of the following successive process steps was used: thermophilic anaerobic digestion with sequential separation by decanter centrifuge, post-digestion in UASB reactor, partial oxidation and finally OLAND process. This combination resulted in reduction of the total organic, nitrogen and phosphorus contents by 96%, 88%, and 81%, respectively.
Original languageEnglish
JournalWater Research
Volume42
Issue number15
Pages (from-to)4083-4090
ISSN0043-1354
DOIs
Publication statusPublished - 2008

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