Evaluation of granular anaerobic ammonium oxidation process for the disposal of pre-treated swine manure
- Published
- Accepted
- Subject Areas
- Biotechnology, Environmental Sciences
- Keywords
- granular sludge, Anammox, swine manure, mass balance, organic matter, nitrogen
- Copyright
- © 2014 Ni et al.
- Licence
- This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ PrePrints) and either DOI or URL of the article must be cited.
- Cite this article
- 2014. Evaluation of granular anaerobic ammonium oxidation process for the disposal of pre-treated swine manure. PeerJ PrePrints 2:e271v1 https://doi.org/10.7287/peerj.preprints.271v1
Abstract
With rising environmental concerns on potable watersafety and eutrophication, increased media attention and tighter environmental regulations, managing animal wastes in an environmentally responsible and economically feasible way can be a challenge. In this study, the possibility of using granular anammox process for ammonia removal from swine waste treatment water was investigated. A rapid decrease of NO2 --N and NH4 +-N was observed during incubation with wastewater from an activated sludge deodorization reactor and anaerobic digestion-partial oxidation treatment process treating swine manure and its corresponding control artificial wastewaters. Ammonium removal dropped from 98.0 ± 0.6% to 66.9 ± 2.7% and nearly absent when the organic load in the feeding increased from 232 mg COD/L to 1160 mg COD/L and 2320 mg COD/L. The presence of organic carbon had limited effect on nitrite and total nitrogen removal. At a COD to N ratio of 0.9, COD inhibitory organic load threshold concentration was 727 mg COD/L. Mass balance indicated that denitrifiers played an important role in nitrite, nitrate and organic carbon removal. These results demonstrated that anammox system had the potential to effectively treat swine manure that can achieve high nitrogen standards at reduced costs.
Author Comment
This is a submission to PeerJ for review.