scholarly journals Spectral characterization of the effect of gas-water ratio on dissolved organic nitrogen variation along biological aerated filter for micropolluted source water pre-treatment

2021 ◽  
Author(s):  
Jia Kang ◽  
Gang-fu Song ◽  
Shu-li Liu ◽  
Chu-qiong Song ◽  
Xu Gao
Keyword(s):  
Regional Integration ◽  
Dissolved Organic Nitrogen ◽  
Organic Nitrogen ◽  
Spectral Characteristics ◽  
Three Dimensional ◽  
Drinking Water Treatment ◽  
Biological Aerated Filter ◽  
Parafac Model ◽  
Aerated Filter ◽  
Water Ratio

Abstract In order to improve our understanding of dissolved organic nitrogen (DON) variation characteristics in the biological aerated filter (BAF) for drinking water treatment, this study focused on gas-water ratio, a controlling factor of BAF operation, to study spectral characteristics of DON under different gas-water ratio conditions (0, 0.5:1, 2:1 and 10:1). The variations of dissolved organic carbon (DOC) and DON concentrations showed that DOC removal efficiency was consistent with DON concentration, both of which increased with the increase of gas-water ratio, but the increase gradually reduced and was certain limited. Three-dimensional excitation–emission matrix (3D-EEM) spectroscopy combined with parallel factor (PARAFAC) model and fluorescence regional integration (FRI) technique were applied to analyze the effect of gas-water ratio on spectral characteristics of DON, PARAFAC analysis results identified the main component of DON were tryptophan and protein related substances. The resistances of various fluorescent substances in the FRI technique under the influence of gas-water ratio were shown as: protein substances > humic acid and fulvic acid substances ≈ SMPs-like substances. Correlation analysis showed that the variation of FIS from PARAFAC model was consistent with corresponding normalized integration volume in FRI analysis under different gas-water ratios.

Experimental Study on Domestic Sewage Treatment by Biological Aerated Filter

2011 ◽  
Vol 183-185 ◽  
pp. 432-436
Author(s):  
Xia Wang ◽  
Yong Qiang Wu
Keyword(s):  
Sewage Treatment ◽  
Domestic Sewage ◽  
Operating Conditions ◽  
Operating Costs ◽  
Biological Aerated Filter ◽  
Optimal Operating ◽  
Hydraulic Loading ◽  
N Removal ◽  
Aerated Filter ◽  
Water Ratio

On the up-flow biological aerated filter to remove COD and NH3-N were studied the effect and contrast in various stages of finding the optimal operating conditions, so as to achieve energy conservation, the purpose of reducing operating costs. Through experiment studied that the variation of air-water ratio, hydraulic loading, organic concentration in the removal of COD and NH3-N effects, observe and analyse the change of COD and NH3-N removal and the characteristics of microorganisms of filter’s different height. The results showed that COD and NH3-N removal are high under the condition of air-water ratio 4:1~5:1, hydraulic loading 1~2 m3/ (m2●h), organic concentration 300~400 mg/L. The concentration of COD and NH3-N of effluent which are treated by biological aerated filter can meet with second degree discharging standards.

Improved efficiency of reactor startup in biological aerated filter by poly(lactic acid)

2014 ◽  
Vol 15 (2) ◽  
pp. 348-355
Author(s):  
Hui Feng ◽  
Fu-yi Cui ◽  
Yi-zhong Xie ◽  
Yan Wei ◽  
Zhi-wei Zhao
Keyword(s):  
Lactic Acid ◽  
Photoelectron Spectroscopy ◽  
Denaturing Gradient Gel Electrophoresis ◽  
Drinking Water Treatment ◽  
Ammonia Nitrogen ◽  
Poly Lactic Acid ◽  
Enhancement Effect ◽  
Biological Aerated Filter ◽  
Gradient Gel Electrophoresis ◽  
Aerated Filter

The enhancement effect of polyethylene (PE) surfaces modified with poly(lactic acid) (PLA) on formation of nitrifying biofilms in biological aerated filter (BAF) was investigated in this study. X-ray photoelectron spectroscopy, scanning electron microscope, and protein absorption analysis revealed that modified PE surfaces produced active groups, including carboxyl (O═C─O), hydroxyl (C─OH), and carbonyl (C═O), increased surface roughness, and enhanced the adsorption of both the bovine serum albumin and fibrinogen. During the startup period of 33 days, the average removal rates of ammonia nitrogen (NH3-H) were 68 and 72% before and after modification which were 36 and 43% for total nitrogen, 47 and 45% for total organic carbon. The results of denaturing gradient gel electrophoresis experiments demonstrated that modified carriers adsorbed and gathered more species of bacteria on surfaces. Thus, surface modification of PE suspended carrier by PLA improved the efficiency of reactor startup for drinking water treatment.

Study on Municipal Wastewater Treated by Biological Aerated Filter

2012 ◽  
Vol 610-613 ◽  
pp. 1743-1746 ◽  
Author(s):  
Xing Yu Bian ◽  
Xing Sheng Kang ◽  
Yi Li ◽  
Min Kong ◽  
Yan Hao Zhang ◽  
...  
Keyword(s):  
Municipal Wastewater ◽  
Optimal Operation ◽  
Biological Aerated Filter ◽  
Municipal Wastewater Treatment ◽  
Optimal Conditions ◽  
Wastewater Discharge ◽  
Operation Parameters ◽  
Removal Efficiencies ◽  
Aerated Filter ◽  
Water Ratio

The performance of the municipal wastewater treatment using the Biological Aerated Filter (BAF) was investigated. The optimal operation parameters such as air/water ratio, water temperature, filtration velocity were achieved, and the removal efficiencies of CODCr, NH3 and SS were 80％, 98％, and 95％, respectively at the optimal conditions. The effluent can meet the integrated wastewater discharge standard in China.

Removal of ibuprofen from municipal sewage by three-dimensional particle electrode combined with a biological aerated filter (TDE-BAF)

2015 ◽  
Vol 57 (43) ◽  
pp. 20470-20475 ◽  
Author(s):  
Yan Feng ◽  
Xinwei Wang ◽  
Jingyao Qi ◽  
Yixuan Feng ◽  
Zhaoyang Wang ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Municipal Sewage ◽  
Biological Aerated Filter ◽  
Aerated Filter
Sign in / Sign up

Export Citation Format

Share Document