Performance of double-layer biofilter packed with coal fly ash ceramic granules in treating highly polluted river water

Zhaoqian Jing; Yu You Li; Shiwei Cao; Yuyu Liu

doi:10.1016/j.biortech.2012.06.069

Performance of double-layer biofilter packed with coal fly ash ceramic granules in treating highly polluted river water

Zhaoqian Jing, Yu You Li, Shiwei Cao, Yuyu Liu

Research output: Contribution to journal › Article › peer-review

23 Citations (Scopus)

Abstract

To improve trickling filters' denitrification efficiency, a biofilter with a trickling upper layer and a submerged lower layer was developed and applied in treating highly polluted river water. It was packed with porous coal fly ash ceramic granules. Its start-up characteristics, influence of hydraulic loading rates (HLR), carbon/nitrogen (C/N) ratio and filter depth on pollutants removal were investigated. The results indicated this biofilter was started quickly in 16days with river sediment as inoculum. Alternating nitrification and denitrification were achieved when water flowed downwards. COD and nitrogen were mainly removed in the upper layer and the lower layer, respectively. With HLR of 4.0-5.0m³/(m²d), chemical oxygen demand (COD), ammonium (NH₄⁺-N) and total nitrogen (TN) in the effluent were below 50, 5 and 15mg/L, respectively. This biofilter removed more than 80% of COD, 85% of NH₄⁺-N and 60% of TN with C/N ratios ranging from 6 to 10.

Original language	English
Pages (from-to)	212-217
Number of pages	6
Journal	Bioresource Technology
Volume	120
DOIs	https://doi.org/10.1016/j.biortech.2012.06.069
Publication status	Published - 2012 Sept

Keywords

Biofilter
Ceramic granule
Coal fly ash
Denitrification
Double-layer

ASJC Scopus subject areas

Bioengineering
Environmental Engineering
Renewable Energy, Sustainability and the Environment
Waste Management and Disposal

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.biortech.2012.06.069

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@article{eec65879cead4814a6bf1d790c90f806,

title = "Performance of double-layer biofilter packed with coal fly ash ceramic granules in treating highly polluted river water",

abstract = "To improve trickling filters' denitrification efficiency, a biofilter with a trickling upper layer and a submerged lower layer was developed and applied in treating highly polluted river water. It was packed with porous coal fly ash ceramic granules. Its start-up characteristics, influence of hydraulic loading rates (HLR), carbon/nitrogen (C/N) ratio and filter depth on pollutants removal were investigated. The results indicated this biofilter was started quickly in 16days with river sediment as inoculum. Alternating nitrification and denitrification were achieved when water flowed downwards. COD and nitrogen were mainly removed in the upper layer and the lower layer, respectively. With HLR of 4.0-5.0m3/(m2d), chemical oxygen demand (COD), ammonium (NH4+-N) and total nitrogen (TN) in the effluent were below 50, 5 and 15mg/L, respectively. This biofilter removed more than 80% of COD, 85% of NH4+-N and 60% of TN with C/N ratios ranging from 6 to 10.",

keywords = "Biofilter, Ceramic granule, Coal fly ash, Denitrification, Double-layer",

author = "Zhaoqian Jing and Li, {Yu You} and Shiwei Cao and Yuyu Liu",

note = "Funding Information: This research was supported by the project of Jiangsu government scholarship for study abroad (200946) and science and technology project of China Housing and Urban-Rural Development Ministry (2010-K7-10).",

year = "2012",

month = sep,

doi = "10.1016/j.biortech.2012.06.069",

language = "English",

volume = "120",

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T1 - Performance of double-layer biofilter packed with coal fly ash ceramic granules in treating highly polluted river water

AU - Jing, Zhaoqian

AU - Li, Yu You

AU - Cao, Shiwei

AU - Liu, Yuyu

N1 - Funding Information: This research was supported by the project of Jiangsu government scholarship for study abroad (200946) and science and technology project of China Housing and Urban-Rural Development Ministry (2010-K7-10).

PY - 2012/9

Y1 - 2012/9

N2 - To improve trickling filters' denitrification efficiency, a biofilter with a trickling upper layer and a submerged lower layer was developed and applied in treating highly polluted river water. It was packed with porous coal fly ash ceramic granules. Its start-up characteristics, influence of hydraulic loading rates (HLR), carbon/nitrogen (C/N) ratio and filter depth on pollutants removal were investigated. The results indicated this biofilter was started quickly in 16days with river sediment as inoculum. Alternating nitrification and denitrification were achieved when water flowed downwards. COD and nitrogen were mainly removed in the upper layer and the lower layer, respectively. With HLR of 4.0-5.0m3/(m2d), chemical oxygen demand (COD), ammonium (NH4+-N) and total nitrogen (TN) in the effluent were below 50, 5 and 15mg/L, respectively. This biofilter removed more than 80% of COD, 85% of NH4+-N and 60% of TN with C/N ratios ranging from 6 to 10.

AB - To improve trickling filters' denitrification efficiency, a biofilter with a trickling upper layer and a submerged lower layer was developed and applied in treating highly polluted river water. It was packed with porous coal fly ash ceramic granules. Its start-up characteristics, influence of hydraulic loading rates (HLR), carbon/nitrogen (C/N) ratio and filter depth on pollutants removal were investigated. The results indicated this biofilter was started quickly in 16days with river sediment as inoculum. Alternating nitrification and denitrification were achieved when water flowed downwards. COD and nitrogen were mainly removed in the upper layer and the lower layer, respectively. With HLR of 4.0-5.0m3/(m2d), chemical oxygen demand (COD), ammonium (NH4+-N) and total nitrogen (TN) in the effluent were below 50, 5 and 15mg/L, respectively. This biofilter removed more than 80% of COD, 85% of NH4+-N and 60% of TN with C/N ratios ranging from 6 to 10.

KW - Biofilter

KW - Ceramic granule

KW - Coal fly ash

KW - Denitrification

KW - Double-layer

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Performance of double-layer biofilter packed with coal fly ash ceramic granules in treating highly polluted river water

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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