Study on Compound Biofilm Formation on the surface of Iron Oxide Coated Sands and Its Removal Efficiency to Ammonia-Nitrogen
- 10.2991/mems.2012.79How to use a DOI?
- Iron Oxide Coated Sand; Bio-Raw Quartz Sands; Bio-Iron Oxide Coated Sands; Compound Formation; Ammonia- Nitrogen Removal Efficiency; Morphologic Properties
By using a homemade Iron Oxide Coated Sands filtration medium (for short: IOCS), start-up behaviors of compound biofilm formation on the surface of IOCS were investigated with the help of a series of experiments, and its removal efficiencies to Ammonia-Nitrogen contained in micropollution raw water were analyzed as well. The differences of removal efficiency between raw quartz sands (for short: RQS) coated biofilm and bio-IOCS were discussed. Surface morphologic properties of two kinds of bio-sands were analyzed too. The results are shown as follows: The biomass of Bio- RQS, and Bio-IOCS are 15.46 nmolP/(g sand) and 13.79 nmolP/(g sand) at the initial stage of biofilm formation, 18.75 nmolP/(g sand) and 20.09 nmolP/(g sand) at the stable stage. When the concentration of Ammonia-Nitrogen is in the range of 1.0 mg/L to 2.0mg/L, removal rate of Bio- RQS and Bio-IOCS is 92%, 95% separately at the initial stage, and it is 60%, 80% respectively at the stable stage. If concentration of Ammonia-Nitrogen varies from 0.5 mg/L to 4.0mg/L, removal rate of Bio- RQS increases from 60% to 80%, and Bio-IOCS from 70% to 95%. The surface morphologic properties of the two filters are quite different before and after filtration and its biofilm formation. The surface pore sizes become smaller, surface appearances are rougher and its porosity is high. Surface morphologic characteristics of Bio- IOCS are changed more markedly than those of IOCS and bio- RQS.
- © 2012, the Authors. Published by Atlantis Press.
- Open Access
- This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Cite this article
TY - CONF AU - Li Dongmei AU - Liu Bei AU - Huang Taifu AU - Huang Mingzhu AU - Lin Xianzeng AU - Ye Tingjin PY - 2012/12 DA - 2012/12 TI - Study on Compound Biofilm Formation on the surface of Iron Oxide Coated Sands and Its Removal Efficiency to Ammonia-Nitrogen BT - Proceedings of the 1st International Conference on Mechanical Engineering and Material Science (MEMS 2012) PB - Atlantis Press SP - 299 EP - 302 SN - 1951-6851 UR - https://doi.org/10.2991/mems.2012.79 DO - 10.2991/mems.2012.79 ID - Dongmei2012/12 ER -