scholarly journals Carbon and nitrogen removal from a synthetic dairy effluent in a vertical-flow fixed bed bioreactor

2020 ◽  
Vol 12 ◽  
pp. 100581
Author(s):  
Ahmed Hamdani ◽  
Abdeltif Amrane ◽  
Imane Kader Yettefti ◽  
Mohammed Mountadar ◽  
Omar Assobhei
Keyword(s):  
Nitrogen Removal ◽  
Fixed Bed ◽  
Vertical Flow ◽  
Dairy Effluent ◽  
Carbon And Nitrogen ◽  
Fixed Bed Bioreactor

scholarly journals Nitrogen Removal Efficiency and Microbial Community Analysis of a High-Efficiency Honeycomb Fixed-Bed Bioreactor

Water ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1832
Author(s):  
Jie Xu ◽  
Chao Zhu ◽  
Yi Liu ◽  
Guanghui Lv ◽  
Changyan Tian ◽  
...  
Keyword(s):  
Microbial Community ◽  
Removal Efficiency ◽  
Nitrogen Removal ◽  
High Throughput Sequencing ◽  
High Efficiency ◽  
Removal Rate ◽  
Fixed Bed ◽  
Microbial Community Analysis ◽  
Sequencing Analysis ◽  
Fixed Bed Bioreactor

Based on the concept of microbial community multi-processing in integrated spatial bacterial succession (ISBS), this study constructs a highly efficient cellular fixed-bed bioreactor that follows the growth of biological flora in the wastewater treatment process. The reactor is organically partitioned based on synergistic laws and in accordance with environmental and microbial metabolic changes, and sewage is subjected to unitized and specialized biological treatment under direct current conditions. The results show that the ISBS reactor exhibits stable nitrogen removal performance under a low-carbon source. Compared with traditional sewage biochemical treatment technology, the microbial concentration is increased by 2–3 times and even up to 12 times, and the ammonia nitrogen removal rate is maintained at 99%. The removal rate reaches 90% (hydraulic retention time of 14 h). High-throughput sequencing analysis based on 16S rDNA reveals the microbial community structure succession at different depths of the same section of the reactor. The microbial community is rich under the influence of environmental factors and exhibits different responses. The intervals vary. An analysis of the microbial community function explains why the ISBS reactor has high nitrogen removal efficiency.

Effect of salinity on nitrification efficiency and structure of ammonia-oxidizing bacterial communities in a submerged fixed bed bioreactor

2015 ◽  
Vol 266 ◽  
pp. 233-240 ◽  
Author(s):  
C. Cortés-Lorenzo ◽  
M. Rodríguez-Díaz ◽  
D. Sipkema ◽  
B. Juárez-Jiménez ◽  
B. Rodelas ◽  
...  
Keyword(s):  
Bacterial Communities ◽  
Fixed Bed ◽  
Fixed Bed Bioreactor

Nitrogen Removal and Nitrate Leaching for Two Perennial, Sod-Based Forage Systems Receiving Dairy Effluent

2003 ◽  
Vol 32 (3) ◽  
pp. 996-1007 ◽  
Author(s):  
Kenneth R. Woodard ◽  
Edwin C. French ◽  
Lewin A. Sweat ◽  
Donald A. Graetz ◽  
Lynn E. Sollenberger ◽  
...  
Keyword(s):  
Nitrogen Removal ◽  
Nitrate Leaching ◽  
Dairy Effluent

Screening and Influencing Factors of Halophilic Denitrifying Bacteria

2012 ◽  
Vol 550-553 ◽  
pp. 1455-1459
Author(s):  
Jing Tang ◽  
Hong Ming E ◽  
Jin Xiang Fu ◽  
Jin Nan Chen ◽  
Ming Fan
Keyword(s):  
Nitrogen Removal ◽  
Morphological Characteristics ◽  
Development Trend ◽  
Denitrifying Bacteria ◽  
High Salt ◽  
Research Progress ◽  
Saline Wastewater ◽  
Carbon And Nitrogen ◽  
Petroleum Chemical ◽  
Seafood Processing

With nitrite or nitrate nitrogen as electron acceptor in the high salt conditons, halophilic denitrifying bacteria can transfer nitrite or nitrate to nitrogen, thereby purifying the high-salt wastewater. Halophilic denitrifying bacteria play an important role in the carbon and nitrogen removal of saline wastewater, such as petroleum, chemical industry, seafood processing and seafood farming. This article dissussed halophilic denitrifying bacteria screening, the main types and the corresponding morphological characteristics, then we focused on the research progress of main factors of halophilic denitrifying bacteria’s growth and nitrogen removal. Finally put forward the current problems of the research and development trend of halophilic denitrifying bacteria.

Different Types of Microbial Fuel Cell (MFC) Systems for Simultaneous Electricity Generation and Pollutant Removal

2015 ◽  
Vol 74 (3) ◽  
Author(s):  
S. M. Zain ◽  
N. L. Ching ◽  
S. Jusoh ◽  
S. Y. Yunus
Keyword(s):  
Nitrogen Removal ◽  
Continuous Flow ◽  
Electricity Generation ◽  
Pollutant Removal ◽  
Flow Mode ◽  
Oxidizing Agent ◽  
Batch Mode ◽  
Carbon And Nitrogen ◽  
Different Types ◽  
The Relationship

The aim of this study is to identify the relationship between the rate of electricity generation and the rate of carbon and nitrogen removal from wastewater using different MFC processes.  Determining whether the generation of electricity using MFC process could be related to the rate of pollutant removal from wastewater is noteworthy. Three types of MFC process configurations include the batch mode (SS), a continuous flow of influent with ferricyanide (PF) as the oxidizing agent and a continuous flow of influent with oxygen (PU) as the oxidizing agent. The highest quantity of electricity generation was achieved using the continuous flow mode with ferricyanide (0.833 V), followed by the continuous flow mode with oxygen (0.589 V) and the batch mode (0.352 V). The highest efficiency of carbon removal is also achieved by the continuous flow mode with ferricyanide (87%), followed by the continuous flow mode with oxygen (51%) and the batch mode (46%). Moreover, the continuous flow mode with ferricyanide produced the highest efficiency for nitrogen removal (63%), followed by the continuous flow mode with oxygen (54%) and the batch mode (27%).

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