Regulatory strategies and microbial response characteristics of single-level biological aerated filter-enhanced nitrogen removal

2021 ◽  
Vol 42 ◽  
pp. 102190
Author(s):  
Wuang Ren ◽  
Fengfeng Cao ◽  
Kai Ju ◽  
Fengbing Tang ◽  
Beibei Chai ◽  
...  
Keyword(s):  
Nitrogen Removal ◽  
Biological Aerated Filter ◽  
Single Level ◽  
Response Characteristics ◽  
Regulatory Strategies ◽  
Microbial Response ◽  
Aerated Filter

Demonstration of an up-flow biological aerated filter system for nitrogen removal from non-nitrified secondary effluent

2015 ◽  
Vol 2015 (3) ◽  
pp. 1-5
Author(s):  
Liyan Jin ◽  
Young J Eum ◽  
Joon H Min ◽  
Hongkeun Park
Keyword(s):  
Nitrogen Removal ◽  
Secondary Effluent ◽  
Biological Aerated Filter ◽  
Filter System ◽  
Aerated Filter

Simultaneous nitrification and denitrification in biofilters with real time aeration control

2001 ◽  
Vol 43 (1) ◽  
pp. 269-276 ◽  
Author(s):  
N. Puznava ◽  
M. Payraudeau ◽  
D. Thornberg
Keyword(s):  
Real Time ◽  
Nitrogen Removal ◽  
Simultaneous Nitrification And Denitrification ◽  
Biological Aerated Filter ◽  
Diffusion Effect ◽  
Different Depths ◽  
Nitrification And Denitrification ◽  
Aerated Filter ◽  
Denitrification Process ◽  
Aeration Control

The aim of this article is to present a new biological aerated filter (BAF) for nitrogen removal based on simultaneous nitrification and denitrification. Contrary to the systems which integrate both an aerated and a non-aerated zone to allow complete nitrogen removal in one compact or two different units (pre-denitrification and nitrification), this upflow BAF system is based on the principle of simultaneous nitrification and denitrification since the filter is completely aerated. The denitrification process is possible due to the diffusion effect which dominates biofilm processes. The real time aeration control allows us to maintain a low dissolved oxygen value (0.5 to 3 mg O2/l). In this case, the biofilm will not be fully (or less) penetrated with oxygen and denitrification will be carried out in a large part of the biofilm. Therefore, nitrification and denitrification is running simultaneously in different depths of the biofilm. By using 50% less air this BAF gave the same results (less than 20mg TN/l) on pilot plant as a classical nitrification and denitrification BAF (Toettrup et al., 1994). Less recirculation was necessary to achieve the same denitrification.

Nitrification and denitrification in partially aerated biological aerated filter (BAF) with dual size sand media

2007 ◽  
Vol 55 (1-2) ◽  
pp. 9-17 ◽  
Author(s):  
J.H. Ha ◽  
S.K. Ong
Keyword(s):  
Total Nitrogen ◽  
Nitrogen Removal ◽  
Pilot Scale ◽  
Biological Aerated Filter ◽  
Loading Rates ◽  
Oxic Zone ◽  
Nitrogen Concentrations ◽  
Total Nitrogen Removal ◽  
Aerated Filter ◽  
Anoxic Zones

A 104-mm (4-inch) diameter pilot-scale biological aerated filter (BAF) with a media depth of 2.5 m (8.3 feet) was operated with an anaerobic, anoxic and oxic zone at a temperature of 23°C. The medium for the anaerobic and anoxic zones was 10 mm diameter sand while the medium for the oxic zone was 5 mm diameter sand. The influent sCOD and total nitrogen concentrations in the feedwater were approximately 250 mg/L and 35 mg N/L, respectively. sCOD removal at optimum hydraulic retention time (HRT) of 3 h with recirculation rates of 100, 200 and 300% in the column was above 96%. Nitrification was found to be more than 96% for 3 h HRT at 200 and 300% recirculation. Total nitrogen removal was consistent at more than 80% for 4 and 6 h HRT at 300% recirculation. For 3 h HRT and 300% recirculation, total nitrogen removal was approximately 79%. The ammonia loading rates for maximum ammonia removed were 0.15 and 0.19 kg NH3-N/m3-day for 100 and 200% recirculation, respectively. The experimental results demonstrated that the BAF can be operated at an HRT of 3 h with 200–300% recirculation rates with more than 96% removal of sCOD and ammonia and at least 75% removal of total nitrogen.

scholarly journals Nitrification of low concentration ammonia nitrogen using zeolite biological aerated filter (ZBAF)

2019 ◽  
Vol 25 (4) ◽  
pp. 554-560 ◽  
Author(s):  
Jin-Su Kim ◽  
Ji-Young Lee ◽  
Seung-Kyu Choi ◽  
Qian Zhu ◽  
Sang-Ill Lee
Keyword(s):  
Removal Efficiency ◽  
Nitrogen Removal ◽  
Municipal Wastewater ◽  
Pond Water ◽  
Ammonia Nitrogen ◽  
Biological Aerated Filter ◽  
Efficient Treatment ◽  
Low Concentration ◽  
Nitrogen Treatment ◽  
Aerated Filter

This study focuses on nitrification through a biological aerated filter (BAF) that is filled with a zeolite medium at low concentrations of ammonia. The zeolite medium consists of natural zeolite powder. The BAF is operated under two types of media, which are a ball-type zeolite medium and expanded poly propylene (EPP) medium. Nitrification occurred in the zeolite BAF (ZBAF) when the influent concentration of ammonia nitrogen was 3 mg L-1, but the BAF that was filled with an EPP medium did not experience nitrification. The ammonia nitrogen removal efficiency of ZBAF was 63.38% and the average nitrate nitrogen concentration was 1.746 mg/L. The ZBAF was tested again after a comparison experiment to treat pond water, and municipal wastewater mixed pond water. The ZBAF showed remarkable ammonia-nitrogen treatment at low concentration and low temperature. During this period, the average ammonia nitrogen removal efficiency was 64.56%. Especially, when water temperature decreased to 4.7℃, ammonia nitrogen removal efficiency remained 79%. On the other hand, the chemical-oxygen demand (COD) and phosphorus-removal trends were different. The COD and phosphorus did not show as efficient treatment as the ammonia-nitrogen treatment.

Nitrogen removal from iron oxide red wastewater via partial nitritation-Anammox based on two-stage zeolite biological aerated filter

2019 ◽  
Vol 279 ◽  
pp. 17-24 ◽  
Author(s):  
Xinghui Feng ◽  
Xiaojun Wang ◽  
Zhenguo Chen ◽  
Jing Chen
Keyword(s):  
Iron Oxide ◽  
Nitrogen Removal ◽  
Biological Aerated Filter ◽  
Two Stage ◽  
Partial Nitritation ◽  
Aerated Filter

Impact of Partial Backwashing to Ammonia Nitrogen Removal in Biological Aerated Filter

2011 ◽  
Vol 183-185 ◽  
pp. 720-724 ◽  
Author(s):  
Ping Li ◽  
Li Long Yan ◽  
Fang Ma
Keyword(s):  
Low Temperature ◽  
Protective Effect ◽  
Nitrogen Removal ◽  
Removal Rate ◽  
Ammonia Nitrogen ◽  
Ammonia Removal ◽  
Nitrifying Bacteria ◽  
Biological Aerated Filter ◽  
Previous Level ◽  
Aerated Filter

Biological Aerated Filter has the drawback of severe plug under low temperature, and frequent back-washing would cause the bad performance of ammonia removal. To solve these shortcomings, partial backwashing experiment was carried out to test its amelioration effect on Biological Aerated Filter. The result showed that performing backwashing at the 40 cm of filter had strong protective effect on nitrifying bacteria, the ammonia removal could be improved gradually with the highest removal rate of 71.71%. Partial backwashing affected less on ammonia removal and the removal efficiency could be restored to the previous level after the backwashing completed for 2.5 h.

Biochemical characteristic along UBAF in a one-stage autotrophic nitrogen removal reactor

2016 ◽  
Vol 74 (11) ◽  
pp. 2656-2665
Author(s):  
Tao Liu ◽  
Dong Li ◽  
Jie Zhang
Keyword(s):  
Species Identification ◽  
Nitrogen Removal ◽  
Biochemical Characteristic ◽  
Pollutant Removal ◽  
Biological Aerated Filter ◽  
Removal Process ◽  
One Stage ◽  
Functional Bacteria ◽  
Aerated Filter ◽  
Autotrophic Nitrogen Removal

The Up-flow biological aerated filter (UBAF) based on a one-stage autotrophic nitrogen removal process has been widely investigated nowadays. In this work, the biochemical characteristic along the volcanic-filled UBAF reactor had been studied. The results indicate that short-rod, spherical and elliptical (averaged 0.2–1.0 μm) microorganisms with a specific irregular cauliflower profile existed in the system. Species identification showed Nitrosococcus- and Nitrosomonas-related aerobic ammonium-oxidizing bacteria (AerAOB) and Candidatus Kuenenia stuttgartiensis-like anaerobic ammonium-oxidizing bacteria (AnAOB) were the predominant functional bacteria that mixed with each other and showed no distinct niche in the system. However, the bioactivity of functional microorganisms displayed differently at different filter layers, with a better pollutant-removal activity in the lower parts than in the upper parts of the UBAF. In the lower parts, compact and small zooglea formed, whereas it trended to be larger and looser along the filter. Moreover, there was better biodiversity of AerAOB in the lower part, while AnAOB showed stable and low biodiversity along the filter.

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