Technical and operational feasibility of psychrophilic anaerobic digestion biotechnology for processing ammonia-rich waste
Daniel I. Massé,
Rajinikanth Rajagopal and
Applied Energy, 2014, vol. 120, issue C, 49-55
Ammonia nitrogen plays a critical role in the performance and stability of anaerobic digestion (AD) of ammonia rich wastes like animal manure. Nevertheless, inhibition due to high ammonia remains an acute limitation in AD process. A successful long-term operation of AD process at high ammonia (>5gN/L) is limited. This study focused on validating technical feasibility of psychrophilic AD in sequencing batch reactor (PADSBR) to treat swine manure spiked with NH4Cl up to 8.2±0.3gN/L, as a representative of N-rich waste. CODt, CODs, VS removals of 86±3, 82±2 and 73±3% were attained at an OLR of 3gCOD/L.d, respectively. High-ammonia had no effect on methane yields (0.23±0.04L CH4/gTCODfed) and comparable to that of control reactors, which fed with raw swine manure alone (5.5gN/L). Longer solids/hydraulic retention times in PADSBRs enhanced biomass acclimation even at high-ammonia. Thus VFA, an indicator for process stability, did not accumulate in PADSBR. Further investigation is essential to establish the maximum concentrations of TKN and free ammonia that the PADSBR can sustain.
Keywords: Ammonia inhibition; Biomass acclimation; Pig manure; Psychrophilic anaerobic digestion; Sequencing batch reactor (search for similar items in EconPapers)
References: View complete reference list from CitEc
Citations View citations in EconPapers (4) Track citations by RSS feed
Downloads: (external link)
Full text for ScienceDirect subscribers only
This item may be available elsewhere in EconPapers: Search for items with the same title.
Export reference: BibTeX
RIS (EndNote, ProCite, RefMan)
Persistent link: https://EconPapers.repec.org/RePEc:eee:appene:v:120:y:2014:i:c:p:49-55
Ordering information: This journal article can be ordered from
http://www.elsevier. ... 405891/bibliographic
Access Statistics for this article
Applied Energy is currently edited by J. Yan
More articles in Applied Energy from Elsevier
Series data maintained by Dana Niculescu ().