Influence of organic and ammonia loading on nitrifier activity and nitrification performance for a two-stage biological aerated filter system

1999 ◽  
Vol 39 (7) ◽  
pp. 227-234 ◽  
Author(s):  
K. R. Gilmore ◽  
K. J. Husovitz ◽  
T. Holst ◽  
N. G. Love
Keyword(s):  
Water Quality ◽  
Ammonia Oxidation ◽  
Oligonucleotide Probe ◽  
Treatment Plant ◽  
Ammonia Oxidizing Bacteria ◽  
Biological Aerated Filter ◽  
Two Stage ◽  
Second Stage ◽  
Oxidation Stage ◽  
Aerated Filter

A pilot-scale, two-stage (carbon oxidation stage one, ammonia oxidation stage two) fixed film biological aerated filter (BAF) process was operated during the wintertime on-site at a domestic wastewater treatment plant. Over the study period, hydraulic loadings to the system were varied and generated a range of organic and ammonia loading conditions. Nitrification performance was monitored based on water quality along the length of the filters, effluent water quality, and activity levels of ammonia-oxidizing bacteria within the biofilm using an oligonucleotide probe. Overall nitrification efficiency for wintertime conditions (average temperature 12.4 ± 0.1°C) was greater than 90 percent when ammonia-N loadings to the second stage were 0.6 kg/m3-day or less. Nitrification efficiency started to deteriorate at loadings beyond this point. Biofilm and liquid samples were collected along the distance of the two columns at high and low ammonia loadings. The degree of activity observed by ammonia oxidizing bacteria in the biofilm corresponded with the disappearance of ammonia and the generation of nitrate as water passed through the columns. The zones of ammonia oxidizing activity progressed along the length of the columns as organic and ammonia loadings to the system increased. The oligonucleotide probe data suggest that this shift in the location of the nitrifier population is due to higher BOD loads to the second stage, which supported higher levels of heterotrophic growth in the column.

Research on Pollutant Loading of Biological Aerated Filter

2013 ◽  
Vol 368-370 ◽  
pp. 265-268
Author(s):  
Jie Wang ◽  
Xiao Min Hu
Keyword(s):  
Wastewater Treatment ◽  
Key Words ◽  
Wastewater Treatment Plant ◽  
Treatment Plant ◽  
Biological Aerated Filter ◽  
Two Stage ◽  
Pollutant Loading ◽  
Hydraulic Loading ◽  
In Series ◽  
Aerated Filter

The aim of this study is to investigate the pollutant loading of two-stage biological aerated filter in series. We choose Shenyang Xiannhe wastewater treatment plant as research site. By testing pollutant loading under conditions of the same hydraulic loading and different hydraulic loading respectively, we discovered that there was great difference between the 1st filter and the 2nd filter. COD loading of the 1st filter varied from 2.0 m-3.d-1 to 6.0 m-3.d-1,however NH4-H loading was more complex with NH4-H remove rate being negative in most cases . COD loading of 2nd filter was from 0.2 m-3.d-1to 1.5 m-3.d-1,and NH4-H loading was from 0.4 m-3.d-1 to 1.5 m-3.d-1. Key words: biological aerated filter;pollutant loading.

scholarly journals Antibiotics in WWTP discharge into the Chaobai River, Beijing

2016 ◽  
Vol 42 (4) ◽  
pp. 48-57 ◽  
Author(s):  
Zhang Chunhui ◽  
Wang Liangliang ◽  
Gao Xiangyu ◽  
He Xudan
Keyword(s):  
Water Quality ◽  
Wastewater Treatment ◽  
Treatment Plant ◽  
Water Quality Monitoring ◽  
Environmental Distribution ◽  
Receiving River ◽  
Dominant Point ◽  
Aerated Filter ◽  
Beijing China

Abstract22 representative antibiotics, including 8 quinolones (QNs), 9 sulfonamides (SAs), and 5 macrolides (MCs) were selected to investigate their occurrence and removal efficiencies in a Wastewater Treatment Plant (WWTP) and their distribution in the receiving water of the Chaobai River in Beijing, China. Water quality monitoring was performed in an integrated way at different selected points in the WWTP to explore the potential mechanism of antibiotics removal during wastewater treatment. Water quality of the Chaobai River was also analyzed to examine environmental distribution in a river ecosystem. The results showed that within all the 22 compounds examined, 10 antibiotics were quantified in wastewater influent, 10 in effluent, and 7 in river. Sulfadiazine (SDZ, 396 ng/L) and Sulfamethazine (SMZ, 382 ng/L) were the dominating antibiotics in the influent. Both the conventional treatment and advanced Biological Aerated Filter (BAF) system was important for the removal of antibiotics from the wastewater. And the concentrations of selected antibiotics were ranged from 0-41.8 ng/L in the effluent-receiving river. Despite the fact that the concentrations were reduced more than 50% compared to effluent concentrations, WWTP discharge was still regarded as a dominant point-source input of antibiotics into the Chaobai River.

Greywater treatment with biological aerated filter (BAF) for urban water reuse

2010 ◽  
Vol 10 (6) ◽  
pp. 907-914
Author(s):  
A. Meda ◽  
P. Cornel
Keyword(s):  
Fresh Water ◽  
Water Reuse ◽  
Treatment Plant ◽  
Organic Load ◽  
Design Parameters ◽  
Urban Water ◽  
Biological Aerated Filter ◽  
Service Water ◽  
Aerated Filter ◽  
Set Up

Greywater is an excellent resource for service water in intra-urban reuse. By substituting fresh water with appropriately treated greywater, it is possible to save 30–50% of fresh water. In this paper, an up-flow pilot biological aerated filter (BAF) is tested for the treatment of synthetic greywater and the design parameters are determined. An organic load of 8 kg COD/(m3 d) allows to achieving a good effluent quality with regard to COD, suspended solids, and anionic surfactants. By reducing the organic load to 5 kg COD/(m3 d) full nitrification is achieved as well. A process set-up for a full-scale BAF greywater treatment plant is proposed and dimensioned using the parameters from the pilot plant tests. Here, the required specific volume is approx. 3 L/C for the reactor and 16 L/C for the storage tanks. This feature make the BAF a compact process which can be successfully integrated in intra-urban water reuse schemes.

scholarly journals Correlating Microbial Community Characteristics with Environmental Factors along a Two-Stage Biological Aerated Filter

Water ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 3317
Author(s):  
Yuchen An ◽  
Songmin Li ◽  
Xiaoling Wang ◽  
Yuyang Liu ◽  
Ruonan Wang
Keyword(s):  
Microbial Community ◽  
Environmental Factors ◽  
High Throughput Sequencing ◽  
Pollutant Removal ◽  
Organic Load ◽  
Biological Aerated Filter ◽  
Community Characteristics ◽  
Two Stage ◽  
Degrading Bacteria ◽  
Aerated Filter

The purification effect of a biological aerated filter (BAF) mainly comes from the microorganisms in the reactor. Understanding the correlation between microbial community characteristics and environmental factors along the filter has great significance for maintaining good operation and improving the removal efficiency of the filter. A two-stage BAF was employed to treat domestic sewage under organic loads of 1.02 and 1.55 kg/m3·d for 15 days each. 16S rDNA high-throughput sequencing technology and redundancy analysis were applied to explore the correlation between microbial community characteristics and environmental variables. The results showed that: (1) the crucial organic-degrading bacteria in the A-stage filter were of the genus Novosphingobium, which had a significant increase in terms of relative abundance at sampling outlet A3 (135 cm of the filling height) after the increase of organic load; (2) the microbial communities at different positions in the B-stage filter were similarly affected by environmental factors, and the main bacteria associated with nitrogen removal in the B-stage filter were Zoogloea and Rhodocyclus; and (3) to improve the pollutant removal performance of this two-stage biological aerated filter, a strategy of adding an internal circulation in the B-stage filter can be adopted.

Nutrient removal in reverse osmosis concentrates using a biological aerated filter

2014 ◽  
Vol 15 (2) ◽  
pp. 302-307 ◽  
Author(s):  
H. J. Choi
Keyword(s):  
Reverse Osmosis ◽  
Removal Efficiency ◽  
Nutrient Removal ◽  
Biochemical Oxygen Demand ◽  
High Efficiency ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Biological Aerated Filter ◽  
Aerated Filter ◽  
Ro Concentrate

The aim of this study is to employ a biological aerated filter (BAF) in the treatment of reverse osmosis (RO) concentrate received from reuse of treatment plant wastewater. Furthermore, the influence of chemical oxygen demand (COD)/N ratio on the nutrient removal was analyzed to find the detailed removal pathways of nutrients. The result was found to be high efficiency for biochemical oxygen demand removal (95.86%) compared to that of COD (88.95%) and suspended solids (81.12%). The total phosphorus (TP) (67.66%) and PO4-P (61.42%) removal efficiencies were relatively lower than that of total nitrogen (TN) (81.42%) and NO3-N (76.70%). This may be due to the fact that the biochemical oxygen demand (BOD)/TP ratio (8.01) was relatively low. Decreasing the COD/N ratio decreased TP and PO4-P removal efficiency. However, the removal efficiency of TN and NH4-N was increased from 47.60 to 64.54 and 54.17 to 73.72% with decreasing of COD/N ratio from 8.19 to 7.64, respectively. In addition, the denitrification rate and nitrification rate were increased from 211.8 to 301.0 mg/L d and 87.7 to 109.4 mg/L d, respectively, when COD/N ratios changed from 8.19 to 7.64. Therefore, in order to reuse the RO concentrate, the BAF process could effectively treat the RO concentrate.

Predictions of ice-cover development in streams and its effect on dissolved oxygen modelling

1979 ◽  
Vol 6 (2) ◽  
pp. 197-207 ◽  
Author(s):  
E. McBean ◽  
G. Farquhar ◽  
N. Kouwen ◽  
O. Dubek
Keyword(s):  
Mathematical Model ◽  
Water Quality ◽  
Dissolved Oxygen ◽  
Prediction Model ◽  
Data Input ◽  
Quality Model ◽  
Two Stage ◽  
Second Stage ◽  
Series Of Experiments ◽  
Ice Edge

A two-stage mathematical model is developed for predicting dissolved oxygen levels in ice-covered rivers. The first stage of the model is a prediction model for ice-edge progression as a function of time, and the second stage consists of an extrapolation of a widely used 'summer condition' water-quality model. The results of a series of experiments, both field and laboratory-based, which served as data input generators and calibration testing of the model, are provided.Briefcase-study applications of elements of the model to the Speed River and to the Saint John River are included.

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