DOI: 10.1016/j.watres.2018.10.059
Scopus记录号: 2-s2.0-85055901525
论文题名: How does iron facilitate the aerated biofilter for tertiary simultaneous nutrient and refractory organics removal from real dyeing wastewater?
作者: Chen H. ; Liu Y. ; Xu X. ; Sun M. ; Jiang M. ; Xue G. ; Li X. ; Liu Z.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 344
结束页码: 358
语种: 英语
英文关键词: Aerated biofilter
; Dyeing wastewater
; Iron scrap
; Nitrogen removal
; Tertiary treatment
Scopus关键词: Activated carbon
; Activated carbon treatment
; Air pollution control
; Biodegradability
; Biofilters
; Dyeing
; Iron
; Iron scrap
; Nitrogen removal
; Nutrients
; Organic pollutants
; Phosphorus
; Refractory materials
; Wastewater treatment
; Biological nitrogen removal
; Dyeing wastewater
; Granular activated carbons
; Hydraulic retention time
; Synthetic waste water
; Tertiary treatment
; Textile dyeing wastewater
; Transformation pathways
; Chemicals removal (water treatment)
; ceramisite
; iron
; mineral
; nitrogen
; phosphorus
; unclassified drug
; aeration
; bacterium
; biodegradation
; biofiltration
; concentration (composition)
; control system
; denitrification
; iron
; nutrient dynamics
; organic compound
; wastewater treatment
; Article
; biodegradability
; control system
; hydraulic retention time
; nutrient
; organic pollution
; pollutant
; priority journal
; waste component removal
; waste water
; Bacteroidetes
; Firmicutes
英文摘要: Textile dyeing wastewater is characterized by low biodegradability and high nitrogen strength, which is difficult to meet the increasingly stringent discharge requirements. Therefore, the tertiary nutrient and refractory organics removal is considered and aerated biofilter is often adopted. However, the aerobic condition and carbon source shortage restrict tertiary biological nitrogen removal. In this study, iron scrap was introduced as the filter medium to enhance the pollutant removal capacity, and three aerobic biofilters were constructed. Biofilter Fe-CE was filled with iron scrap and ceramisite; biofilter Fe-AC was added with iron scrap and granular activated carbon, and biofilter CE only had ceramisite to pad as control system. After the biofilters were acclimatized by synthetic wastewater and actual dyeing wastewater, the optimal operation parameters based on nitrogen removal were determined as pH 7, gas-water ratio 5:1, hydraulic retention time 8 h and C/N ratio 8.5:1. The iron scraps improved total nitrogen (TN) removal significantly, with TN removal efficiency of 68.7% and 57.3% in biofilter Fe-AC and biofilter Fe-CE, comparing with biofilter CE of 29.9%. Additionally, phosphorus and COD had better removal performance as well when iron scrap existed. Further investigation interpreted the reason for iron's facilitating effect on tertiary nutrient and refractory organics removal. The introduction of iron scrap made the habitat conditions such as pH values, DO concentrations and biomass contents inside the biofilters change towards the direction beneficial for pollutant elimination especially for nitrogen removal. In iron containing biofilters, the majority of nitrogen, phosphorus and organic pollutants were removed in the iron scrap layers, and more pollutants types appeared, implying that iron triggered pollutants to go through more diverse degradation or transformation pathways. Moreover, the phylum Proteoabcteria dominated in samples of ceramisite-containing biofilters, with abundances more than 40%. The iron scrap existence increased the abundances of phyla Bacteroidetes and Firmicutes, and triggered higher abundance of denitrification bacteria. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122199
Appears in Collections: 气候变化事实与影响
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作者单位: School of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Songjiang District, Shanghai, 201620, China; Jiangsu Tongyan Environm Prod Sci & Technol Co Lt, Yancheng, 224000, China; Shanghai Institute of Pollution Control and Ecological Security200000, China
Recommended Citation:
Chen H.,Liu Y.,Xu X.,et al. How does iron facilitate the aerated biofilter for tertiary simultaneous nutrient and refractory organics removal from real dyeing wastewater?[J]. Water Research,2019-01-01