- Title
- Study on the adsorption of nitrogen and phosphorus from biogas slurry by NaCl-modified zeolite
- Creator
- Cheng, Qunpeng; Li, Hongxia; Xu, Yilu; Chen, Song; Liao, Yuhua; Deng, Fang; Li, Jianfen
- Relation
- PLoS One Vol. 12, Issue 5, no. e0176109
- Publisher Link
- http://dx.doi.org/10.1371/journal.pone.0176109
- Publisher
- Public Library of Science (PLoS)
- Resource Type
- journal article
- Date
- 2017
- Description
- A NaCl-modified zeolite was used to simultaneously remove nitrogen and phosphate from biogas slurry. The effect of pH, contact time and dosage of absorbants on the removal efficiency of nitrogen and phosphate were studied. The results showed that the highest removal efficiency of NH₄⁺₋N (92.13%) and PO₄³⁻₋P (90.3%) were achieved at pH 8. While the zeolite doses ranged from 0.5 to 5 g/100 ml, NH₄⁺₋N and PO₄³⁻₋P removal efficiencies ranged from 5.19% to 94.94% and 72.16% to 91.63% respectively. The adsorption isotherms of N and P removal with NaCl-modified zeolite were well described by Langmuir models, suggesting the homogeneous sorption mechanisms. While through intra-particle diffusion model to analyze the influence of contact time, it showed that the adsorption process of NH₄⁺₋N and PO₄³⁻₋P followed the second step of intra-particle diffusion model. The surface diffusion adsorption step was very fast which was finished in a short time.
- Subject
- nitrogen; phosphorus; biogas slurry; NaCl-modified zeolite
- Identifier
- http://hdl.handle.net/1959.13/1387829
- Identifier
- uon:32673
- Identifier
- ISSN:1932-6203
- Rights
- © 2017 Cheng et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
- Language
- eng
- Full Text
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