Advanced treatment of biologically pretreated coal gasification wastewater using a novel expansive flow biological intermittent aerated filter process with a ceramic filler from reused coal fly ash

RSC Advances ◽  
2016 ◽  
Vol 6 (46) ◽  
pp. 39940-39946 ◽  
Author(s):  
Haifeng Zhuang ◽  
Shengdao Shan ◽  
Chengran Fang ◽  
Xiaoli Yuan
Keyword(s):  
Coal Gasification ◽  
Coal Fly Ash ◽  
Advanced Treatment ◽  
Low Carbon ◽  
Filter Process ◽  
Expansive Flow ◽  
Carbon Nitrogen Ratio ◽  
Nitrogen Ratio ◽  
Coal Gasification Wastewater ◽  
Aerated Filter

A novel expansive flow biological intermittent aerated filter (BIAF) process was employed for the advanced treatment of real biologically pretreated coal gasification wastewater (CGW) which had poor biodegradability and a low carbon/nitrogen ratio.

scholarly journals The contributions and mechanisms of iron-microbes-biochar in constructed wetlands for nitrate removal from low carbon/nitrogen ratio wastewater

RSC Advances ◽  
2020 ◽  
Vol 10 (39) ◽  
pp. 23212-23220
Author(s):  
Jian Xu ◽  
Xiawei Liu ◽  
Jiaolong Huang ◽  
Manqi Huang ◽  
Tao Wang ◽  
...  
Keyword(s):  
Constructed Wetlands ◽  
Nitrate Removal ◽  
Schematic Diagram ◽  
Low Carbon ◽  
Carbon Nitrogen Ratio ◽  
Nitrogen Ratio

Schematic diagram of RDCWs system and proposed mechanisms for nitrate removal.

An iron-carbon-activated carbon and zeolite composite filter, anaerobic-aerobic integrated denitrification device for nitrogen removal in low C/N ratio sewage

2019 ◽  
Vol 80 (2) ◽  
pp. 223-231
Author(s):  
Yixuan Xie ◽  
Ajun Wan ◽  
Xingmin Wang ◽  
Hengjie Dong ◽  
Yunpeng Wu
Keyword(s):  
Activated Carbon ◽  
Nitrogen Removal ◽  
High Efficiency ◽  
Strong Shock ◽  
Autotrophic Denitrification ◽  
Low Carbon ◽  
Carbon Nitrogen Ratio ◽  
Nitrogen Ratio ◽  
Composite Filter ◽  
Zeolite Composite

Abstract In this study, we use an anaerobic-aerobic integrated denitrification (Fe/C-ZACID) device with an iron-carbon-activated carbon and zeolite composite filter to remove nitrogen from simulated low carbon-nitrogen ratio (C/N) sewage. The impacts of dissolved oxygen (DO) level, hydraulic retention time (HRT), C/N and nitrate recirculation ratio on denitrification performance were studied. The results show that when HRT was 6 h, DO was 3 ± 0.1 mg/L, influent C/N was 3, and nitrate recirculation ratio was 100%, and removal rates of 95% for ammonia and 85% for total nitrogen (TN) were achieved. A beaker comparison test demonstrated that this synergistic denitrification system included heterotrophic denitrification, physicochemical denitrification, iron autotrophic denitrification and hydrogen autotrophic denitrification, etc. The Fe/C-ZACID device has a high-efficiency nitrogen removal effect for low C/N ratio sewage and strong shock resistance, which provides technical support and a theoretical basis for advanced denitrification of rural domestic sewage.

Aerobic Denitrification Characteristics Research of Pseudomonas Strains HFX08

2012 ◽  
Vol 253-255 ◽  
pp. 903-907
Author(s):  
Xiu Lan Ma ◽  
Yu Xun Shan ◽  
Fang Yuan Zhang ◽  
Ji Hong Wang
Keyword(s):  
Sodium Acetate ◽  
Potassium Nitrate ◽  
Nitrifying Bacteria ◽  
Aerobic Denitrification ◽  
Low Carbon ◽  
Optimum Growth Temperature ◽  
Carbon Nitrogen Ratio ◽  
Nitrogen Ratio ◽  
Northern City ◽  
Growth Temperature Range

In this report, a strains of nitrifying bacteria HFX08 with low temperature and low carbon nitrogen ratio is separated from the activated sludge which is domesticated of the northern city sewage plant in winter. The optimum carbon source for the growth of the strain is sodium acetate, the source of nitrogen is potassium nitrate and the optimum growth temperature range is 10-20°C correspondingly.

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