scholarly journals Effect of tetracycline on nitrogen removal in Moving Bed Biofilm Reactor (MBBR) System

PLoS ONE ◽  
2022 ◽  
Vol 17 (1) ◽  
pp. e0261306
Author(s):  
Yan Shu ◽  
Donghui Liang
Keyword(s):  
Removal Efficiency ◽  
Nitrogen Removal ◽  
Wastewater Treatment Plants ◽  
Inhibitory Effect ◽  
Biofilm Reactor ◽  
Resistant Bacteria ◽  
Functional Genes ◽  
Moving Bed Biofilm Reactor ◽  
Moving Bed ◽  
Reducing Bacteria

The effect of tetracycline (TC) on nitrogen removal in wastewater treatment plants has become a new problem. This study investigated the effects of TC on nitrogen removal using a Moving Bed Biofilm Reactor system. The results showed that there was no significant effect on nitrogen removal performance when the concentration of TC was 5 mg/L, and that the total nitrogen (TN) removal efficiency could reach 75–77%. However, when the concentration of TC increased to 10 mg/L, the denitrification performance was affected and the TN removal efficiency decreased to 58%. The abundance of denitrifying bacteria such as those in the genus Thauera decreased, and TC-resistant bacteria gradually became dominant. At a TC concentration of 10 mg/L, there were also increases and decreases, respectively, in the abundance of resistance and denitrification functional genes. The inhibitory effect of TC on denitrification was achieved mainly by the inhibition of nitrite-reducing bacteria.

scholarly journals Application of a moving-bed biofilm reactor for sulfur-oxidizing autotrophic denitrification

2017 ◽  
Vol 77 (4) ◽  
pp. 1027-1034 ◽  
Author(s):  
Yan-Xiang Cui ◽  
Di Wu ◽  
Hamish R. Mackey ◽  
Ho-Kwong Chui ◽  
Guang-Hao Chen
Keyword(s):  
Wastewater Treatment ◽  
Steady State ◽  
Removal Efficiency ◽  
Nitrogen Removal ◽  
Biofilm Reactor ◽  
Laboratory Scale ◽  
Autotrophic Denitrification ◽  
Moving Bed Biofilm Reactor ◽  
Moving Bed ◽  
Sulfur Oxidizing

Abstract Sulfur-oxidizing autotrophic denitrification (SO-AD) was investigated in a laboratory-scale moving-bed biofilm reactor (MBBR) at a sewage temperature of 22 °C. A synthetic wastewater with nitrate, sulfide and thiosulfate was fed into the MBBR. After 20 days' acclimation, the reduced sulfur compounds were completely oxidized and nitrogen removal efficiency achieved up to 82%. The operation proceeded to examine the denitrification by decreasing hydraulic retention time (HRT) from 12 to 4 h in stages. At steady state, this laboratory-scale SO-AD MBBR achieved the nitrogen removal efficiency of 94% at the volumetric loading rate of 0.18 kg N·(mreactor3·d)−1. The biofilm formation was examined periodically: the attached volatile solids (AVS) gradually increased corresponding to the decrease of HRT and stabilized at about 1,300 mg AVS·Lreactor−1 at steady state. This study demonstrated that without adding external organic carbon, SO-AD can be successfully applied in moving-bed carriers. The application of SO-AD MBBR has shown the potential for sulfur-containing industrial wastewater treatment, brackish wastewater treatment and the upgrading of the activated sludge system. Moreover, the study provides direct design information for the full-scale MBBR application of the sulfur-cycle based SANI process.

scholarly journals Behavior of nitrogen removal in an aerobic sponge based moving bed biofilm reactor

2017 ◽  
Vol 245 ◽  
pp. 1282-1285 ◽  
Author(s):  
Xinbo Zhang ◽  
Zi Song ◽  
Wenshan Guo ◽  
Yanmin Lu ◽  
Li Qi ◽  
...  
Keyword(s):  
Nitrogen Removal ◽  
Biofilm Reactor ◽  
Moving Bed Biofilm Reactor ◽  
Moving Bed

Accelerating effect of hydroxylamine and hydrazine on nitrogen removal rate in moving bed biofilm reactor

2012 ◽  
Vol 23 (5) ◽  
pp. 739-749 ◽  
Author(s):  
Ivar Zekker ◽  
Kristel Kroon ◽  
Ergo Rikmann ◽  
Toomas Tenno ◽  
Martin Tomingas ◽  
...  
Keyword(s):  
Nitrogen Removal ◽  
Removal Rate ◽  
Biofilm Reactor ◽  
Moving Bed Biofilm Reactor ◽  
Moving Bed

Small Wastewater Treatment Plants Based on Moving Bed Biofilm Reactors

1993 ◽  
Vol 28 (10) ◽  
pp. 351-359 ◽  
Author(s):  
H. Ødegaard ◽  
B. Rusten ◽  
H. Badin
Keyword(s):  
Wastewater Treatment ◽  
Pollution Control ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Biofilm Reactor ◽  
Chemical Plants ◽  
Moving Bed Biofilm Reactor ◽  
Moving Bed ◽  
Biofilm Reactors ◽  
Control Authority

In 1988 the State Pollution Control Authority in Norway made recommendations regarding process designs for small wastewater treatment plants. Amongst these were recommendations for biological/chemical plants where biofilm reactors were used in combination with pretreatment in large septic tanks and chemical post treatment. At the same time the socalled “moving bed biofilm reactor” (MBBR) was developed by a Norwegian company. In this paper, experiences from a small wastewater treatment plant, based on the MBBR and on the recommendations mentioned, will be presented.

Process Consideration to Achieve Nitrogen Removal in a Moving-Bed Biofilm Reactor

2009 ◽  
Vol 2009 (15) ◽  
pp. 2266-2279
Author(s):  
Arbina Shrestha ◽  
Rumana Riffat ◽  
Charles Bott ◽  
Imre Takacs ◽  
Beverley Stinson ◽  
...  
Keyword(s):  
Nitrogen Removal ◽  
Biofilm Reactor ◽  
Moving Bed Biofilm Reactor ◽  
Moving Bed

The application of moving bed biofilm reactor to denitrification process after trickling filters

2016 ◽  
Vol 74 (12) ◽  
pp. 2909-2916 ◽  
Author(s):  
Lukasz Kopec ◽  
Jakub Drewnowski ◽  
Adam Kopec
Keyword(s):  
Organic Carbon ◽  
Nitrogen Removal ◽  
Carbon Concentration ◽  
Biofilm Reactor ◽  
Moving Bed Biofilm Reactor ◽  
Moving Bed ◽  
Trickling Filters ◽  
Organic Carbon Concentration ◽  
Total Nitrogen Removal ◽  
Denitrification Process

The paper presents research of a prototype moving bed biofilm reactor (MBBR). The device was used for the post-denitrification process and was installed at the end of a technological system consisting of a septic tank and two trickling filters. The concentrations of suspended biomass and biomass attached on the EvU Perl moving bed surface were determined. The impact of the external organic carbon concentration on the denitrification rate and efficiency of total nitrogen removal was also examined. The study showed that the greater part of the biomass was in the suspended form and only 6% of the total biomass was attached to the surface of the moving bed. Abrasion forces between carriers of the moving bed caused the fast stripping of attached microorganisms and formation of flocs. Thanks to immobilization of a small amount of biomass, the MBBR was less prone to leaching of the biomass and the occurrence of scum and swelling sludge. It was revealed that the maximum rate of denitrification was an average of 0.73 gN-NO3/gDM·d (DM: dry matter), and was achieved when the reactor was maintained in external organic carbon concentration exceeding 300 mgO2/dm3 chemical oxygen demand. The reactor proved to be an effective device enabling the increase of total nitrogen removal from 53.5% to 86.0%.

Effect of reflux ratio on COD and nitrogen removals from coke plant wastewaters

2010 ◽  
Vol 61 (12) ◽  
pp. 3017-3025 ◽  
Author(s):  
X. L. Shi ◽  
X. B. Hu ◽  
Z. Wang ◽  
L. L. Ding ◽  
H. Q. Ren
Keyword(s):  
Removal Efficiency ◽  
Significant Influence ◽  
Coke Plant ◽  
Biofilm Reactor ◽  
Laboratory Scale ◽  
Reflux Ratio ◽  
Moving Bed Biofilm Reactor ◽  
Moving Bed ◽  
N Removal ◽  
Removal Efficiencies

A laboratory-scale anaerobic-anoxic-aerobic-moving bed biofilm reactor (A1-A2-O-MBBR) system was undertaken to treat coke plant wastewaters from two different factories (wastewater A and B). Wastewater B had higher BOD5/COD ratio and COD/TN ratio than wastewater A. The effects of reflux ratios on COD, TN and NH3-N removals were studied. Results indicated that, with the reflux ratio increased from 2 to 5, COD removals of wastewater A and wastewater B increased from 57.4% to 72.6% and 78.2% to 88.6%, respectively. Meanwhile, TN removals were also increased accompanying reflux ratio rise, from 53.1% to 74.4% for wastewater A and 64.2% to 83.5% for wastewater B. At the same reflux ratio, compared with wastewater A, higher COD and TN removal efficiencies were observed in wastewater B, which had higher BOD5/COD and COD/TN ratio. Reflux ratio had no significant influence on NH3-N removal; 99.0% of the overall NH3-N removal efficiency was achieved by the system for both coke plant wastewaters at any tested reflux ratio. MBBR was effective in NH3-N removal, and about 95% of the NH3-N was removed in the MBBR.

Dairy wastewater treatment in a moving bed biofilm reactor

2002 ◽  
Vol 45 (12) ◽  
pp. 321-328 ◽  
Author(s):  
G. Andreottola ◽  
P. Foladori ◽  
M. Ragazzi ◽  
R. Villa
Keyword(s):  
Wastewater Treatment ◽  
Removal Efficiency ◽  
Biofilm Reactor ◽  
Dairy Wastewater ◽  
Production Cycle ◽  
Nutrient Loads ◽  
Moving Bed Biofilm Reactor ◽  
Moving Bed ◽  
Pre Treatment ◽  
High Concentrations

Dairy raw wastewater is characterised by high concentrations and fluctuations of organic matter and nutrient loads related to the discontinuity in the cheese production cycle and machinery washing. The applicability of a Moving Bed Biofilm Reactor (MBBR) filled with FLOCOR-RMP® plastic media to the treatment of dairy wastewater was evaluated in a pilot-plant. COD fractionation of influent wastewater, MBBR performance on COD and nutrient removal were investigated. A removal efficiency of total COD over 80% was obtained with an applied load up to 52.7 gCOD m−2 d−1 (corresponding to 5 kgCOD m−3d−1). The COD removal kinetics for the MBBR system was assessed. The order of the kinetics resulted very close to half-order in the case of a biofilm partially penetrated by the substrate. The nitrogen removal efficiency varied widely between 13.3 and 96.2% due to the bacterial synthesis requirement. The application of a MBBR system to dairy wastewater treatment may be appropriate when upgrading overloaded activated sludge plants or in order to minimise reactor volumes in a pre-treatment.

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