Assessment of the aerobic glass beads fixed biofilm reactor (GBs-FBR) for the treatment of simulated methylene blue wastewater

AbstractThe present research is focused on the application of glass beads (GBs) in fixed biofilm reactor (FBR) for the treatment of simulated methylene blue (MB) wastewater for 9 weeks under aerobic conditions. The COD of MB wastewater showed a reduction of 86.48% from 2000 to 270.4 mg/L, and BOD was declined up to 97.7% from 1095.5 to 25.03 mg/L. A drastic increase in the pH was observed until the 3rd week (8.5 to 8.28), and later, marginal changes between 8.30 ± 0.02 were noticed. A dramatic fluctuation was observed in ammonia concentration which increased (74.25 mg/L) up till the 2nd week, and from the 3rd week it started declining. In the 9th week, the ammonia concentration dropped to 16.5 mg/L. The color intensity increased significantly up till the 2nd week (259,237.46 Pt/Co) of the experiment and started decreasing slowly thereafter. The SEM–EDX analysis has shown the maximum quantity of carbon content in the GBs without biofilm, and then in the GB samples of 1st, and 9th-week old aerobic biofilms. Furthermore, Raman spectroscopy results revealed that the 9th-week GBs has a fine and strong MB peak and matched with that of the MB stock solution. Overall, the results have shown that the GBs filter media were suitable for the development of active biofilm communities for the treatment of dye wastewater. Thus, GBs-FBR system can be used for wastewater treatment to solve the current problem of industrial pollution in many countries and to protect the aquatic environment from dye pollution caused by the textile industry.

Download Full-text

Evaluation of tire derived rubber (TDR) fixed biofilm reactor (FBR) for remediation of Methylene blue dye from wastewater

Environmental Technology ◽

10.1080/09593330.2020.1737736 ◽

2020 ◽

pp. 1-14 ◽

Cited By ~ 1

Author(s):

D. Naresh Yadav ◽

Iffat Naz ◽

K. Anand Kishore ◽

Devendra Saroj

Keyword(s):

Methylene Blue ◽

Biofilm Reactor ◽

Blue Dye ◽

Methylene Blue Dye ◽

Fixed Biofilm

Download Full-text

Carbon tetrachloride biodegradation in a fixed-biofilm reactor and its kinetic study

Water Science & Technology ◽

10.2166/wst.1998.0802 ◽

1998 ◽

Vol 38 (8-9) ◽

pp. 155-162 ◽

Cited By ~ 3

Author(s):

G. Jin ◽

A. J. Englande

Keyword(s):

Carbon Tetrachloride ◽

Continuous Flow ◽

Model Comparison ◽

Biofilm Reactor ◽

Pseudomonas Cepacia ◽

Initial Concentration ◽

Biphasic Model ◽

Providencia Stuartii ◽

Kinetics Of ◽

Fixed Biofilm

Kinetics of Carbon Tetrachloride biodegradation are evaluated in a continuous-flow fixed-biofilm reactor with controlled initial redox potential. The column was seeded with a mixed culture of indigenous microorganisms Pseudomonas cepacia and Providencia stuartii. The fixed biofilm reactor exhibited 98%–99.9% biodegradation of CT introduced into the reactor at an initial concentration of about 200 μg/l for retention times of 1 to 4 days respectively. Four models were employed to evaluate the kinetics of CT biodegradation. These included: Eckenfelder (1989), Arvin (1991), Bouwer and McCarty (1985) and a biphasic model. Comparison of calculated results with observed results between these models agreed very closely to each other (0.968 < R2 < 0.999). Predicted performance was best described by the model of Bouwer and McCarty (1985). However, the biphasic and Eckenfelder models provided excellent correlations and were much simpler to apply. The biphasic model yielded very good correlations of the data for all detention times evaluated; whereas, the Eckenfelder model effected comparable results only at the longer retention times studied.

Download Full-text

Perchlorate removal using two component biodegradable carriers in particle-fixed biofilm reactor

Water Quality Research Journal ◽

10.2166/wqrjc.2014.047 ◽

2014 ◽

Vol 49 (3) ◽

pp. 234-244

Author(s):

Fang He ◽

Fusheng Li ◽

Haihong Zhou ◽

Lingling Niu ◽

Liguo Wang

Keyword(s):

Carbon Source ◽

Denaturing Gradient Gel Electrophoresis ◽

Polymer Particle ◽

Biofilm Reactor ◽

16S Rrna Genes ◽

Rrna Genes ◽

Biofilm Reactors ◽

Gradient Gel Electrophoresis ◽

Perchlorate Removal ◽

Fixed Biofilm

In this research, biocompounds designed out of two polymers having different degradability was investigated for use as the sole carbon source and biofilm carrier to remove perchlorate in particle-fixed biofilm reactors. Both laboratory batch and column experiments were conducted with perchlorate contaminated groundwater. Batch experiments demonstrated clearly that ClO4– was removed from the aqueous phase readily and the degradation rate constants (k) changed in the range of 0.23–0.37 mg/L h as ClO4– concentration increased from 2 to 8 mg/L. Simultaneous perchlorate and nitrate degradation occurred in the polymer bioreactor. Effluent concentrations of perchlorate varied positively with temperature and fitted the Arrhenius equation expression as k=k20•100.0316(t–20) over the range of 13–30 °C. No perchlorate was detected in the effluent of polymer columns after 20 days’ startup. Complete perchlorate removal was observed at a hydraulic loading rate doubled to 1.8 mL/min. Images prove the concept of the pore and filament structure within the biocompounds, which provide both a heterotrophic biofilm and carbon source. Denaturing gradient gel electrophoresis analysis and partial sequencing of 16S rRNA genes indicated that formerly reported perchlorate-reducing bacteria were present in the polymer particle-fixed biofilm reactors.

Download Full-text

Removal of Methylene Blue Dye by Using Eggshell Powder

Jurnal Teknologi ◽

10.11113/jt.v65.1648 ◽

2013 ◽

Vol 65 (1) ◽

Author(s):

Norzita Ngadi ◽

Chin Chiek Ee ◽

Nor Aida Yusoff

Keyword(s):

Methylene Blue ◽

Textile Industry ◽

Low Cost ◽

Kinetic Studies ◽

Operating Conditions ◽

Blue Dye ◽

Dye Wastewater ◽

Order Model ◽

Aquatic Life ◽

Pseudo Second Order

Dyes contain carcinogenic materials which can cause serious hazards to aquatic life and the users of water. Textile industry is the main source of dye wastewater which results in environmental pollution. Many studies have been conducted to investigate the use of low cost adsorbent as an alternative technique for the adsorption of dye. The objective of this study is to determine the potential of eggshell powder as an adsorbent for methylene blue removal and find out the best operating conditions for the color adsorption at laboratory scale. The adsorption of cationic methylene blue from aqueous solution onto the eggshell powder was carried out by varying the operating parameters which were contact time, pH, dosage of eggshell powder and temperature in order to study their effect in adsorption capacity of eggshell powder. The results obtained showed that the best operating condition for removal of methylene blue was at pH 10 (78.98 %) and temperature 50°C (47.37 %) by using 2 g of eggshell powder (57.03 %) with 30 minutes equilibrium time (41.36 %). The kinetic studies indicated that pseudo-second-order model best described the adsorption process.

Download Full-text

Synthesis of Adsorbent from Bagasse for Methylene Blue Adsorption

Jurnal Kimia VALENSI ◽

10.15408/jkv.v7i2.20916 ◽

2021 ◽

Vol 7 (2) ◽

pp. 188-195

Author(s):

Nurhasni Nurhasni ◽

Sariana Harahap ◽

Ahmad Fathoni ◽

Hendrawati Hendrawati

Keyword(s):

Methylene Blue ◽

Textile Industry ◽

Contact Time ◽

Ph Effect ◽

Blue Dye ◽

Methylene Blue Dye ◽

Batch Method ◽

Homogeneous Surface ◽

Dyeing Process ◽

Ft Ir

The ability of bagasse adsorbents to adsorb methylene blue without activation using 0.5 M H2SO4 solution was examined. Methylene blue is widely used in the textile industry because it produces bright colors, and the dyeing process is fast and easy. This research aims to determine the optimum adsorption conditions, namely the variations in contact time, dye concentration, adsorbent mass, and pH effect on methylene blue, which were carried out using the batch method. Furthermore, the adsorbents were characterized by FT-IR and SEM. The optimum state of the bagasse adsorbent to adsorb methylene blue dye has a mass of 0.5 grams, a contact time of 30 minutes, a concentration of 50 ppm, and a pH of 5. The character of the adsorbent after activation with H2SO4 was better than without activation. The highest adsorption efficiency of methylene blue dye in the batch method was 99.67%. The FTIR spectrum of the bagasse adsorbent showed OH, C-H, C=O, C=C, and C-O functional groups. The adsorption isotherm model for methylene blue dye follows the Langmuir isotherm since the graph obtained is linear with the correlation coefficient (R2) = 1, where the adsorbent has a homogeneous surface.

Download Full-text

Influence of dissolved oxygen on nitrification kinetics in a circulating bed reactor

Water Science & Technology ◽

10.2166/wst.1998.0617 ◽

1998 ◽

Vol 37 (4-5) ◽

pp. 189-193 ◽

Cited By ~ 4

Author(s):

V. Lazarova ◽

R. Nogueira ◽

J. Manem ◽

L. Melo

Keyword(s):

Dissolved Oxygen ◽

Oxygen Concentration ◽

Municipal Wastewater ◽

Ammonia Concentration ◽

Pilot Scale ◽

Biofilm Reactor ◽

Laboratory Scale ◽

Nitrification Rate ◽

Nitrification Kinetics ◽

Laboratory Scale Reactor

The influence of dissolved oxygen concentration in nitrification kinetics was studied in a new biofilm reactor, the circulating bed reactor (CBR). The study was carried out partly at laboratory scale with synthetic water containing inorganic carbon and nitrogen compounds, and partly at pilot scale for secondary and tertiary nitrification of municipal wastewater. The experimental results showed that either the ammonia or the oxygen concentration could be limiting for the nitrification rate. The transition from ammonia to oxygen limiting conditions occurred for an oxygen to ammonia concentration ratio of about 1.5 - 2 gO2/gN-NH4+ for both laboratory- and pilot-scale reactors. The nitrification kinetics of the laboratory-scale reactor was close to a half order function of the oxygen concentration, when oxygen was the rate limiting substrate.

Download Full-text

A new device to select carriers for biomass immobilization and application in an aerobic/anaerobic fixed-bed sequencing batch biofilm reactor for nitrogen removal

Water Science & Technology ◽

10.2166/wst.2016.410 ◽

2016 ◽

Vol 74 (11) ◽

pp. 2666-2674 ◽

Cited By ~ 2

Author(s):

A. Sarti ◽

A. W. Lamon ◽

A. Ono ◽

E. Foresti

Keyword(s):

Nitrogen Removal ◽

Fixed Bed ◽

Ammonia Concentration ◽

Nitrogen Loading ◽

Biofilm Reactor ◽

New Approach ◽

New Device ◽

Sequencing Batch Biofilm Reactor ◽

Biofilm Carrier ◽

Aerobic And Anaerobic

This study proposes a new approach to selecting a biofilm carrier for immobilization using dissolved oxygen (DO) microsensors to measure the thickness of aerobic and anaerobic layers in biofilm. The biofilm carriers tested were polyurethane foam, mineral coal (MC), basaltic gravel, and low-density polyethylene. Development of layers in the biofilm carrier surface was evaluated using a flow cell device, and DO profiles were conducted to determine the size of the layers (aerobic and anaerobic). MC was the biofilm carrier selected due to allowing the development of larger aerobic and anaerobic layers in the biofilm (896 and 1,058 μm, respectively). This ability is supposed to improve simultaneous nitrogen removal by nitrification and denitrification biological processes. Thus, as a biofilm carrier, MC was used in a fixed-bed sequencing batch biofilm reactor (FB-SBBR) for treatment of wastewater with a high ammonia concentration (100–400 mgNH4+-N L−1). The FB-SBBR (15.0 L) was filled with matrices of the carrier and operated under alternating aeration and non-aeration periods of 6 h each. At a mean nitrogen loading rate of 0.55 ± 0.10 kgNH4+-N m−3 d−1, the reactor attained a mean nitrification efficiency of 95 ± 9% with nitrite as the main product (aerobic period). Mean denitrification efficiency during the anoxic period was 72 ± 13%.

Download Full-text

Modeling and Optimization of Photocatalytic Degradation of Methylene Blue Using Lanthanum Vanadate

Materials Science Forum ◽

10.4028/www.scientific.net/msf.1008.97 ◽

2020 ◽

Vol 1008 ◽

pp. 97-103

Author(s):

Mahmoud Samy ◽

Mona G. Ibrahim ◽

Mohamed Gar Alalm ◽

Manabu Fujii

Keyword(s):

Methylene Blue ◽

Photocatalytic Degradation ◽

Removal Efficiency ◽

Textile Industry ◽

Degradation Process ◽

Optimum Conditions ◽

Photo Degradation ◽

Operational Conditions ◽

Degradation Rates ◽

Effects Of Ph

Methylene blue (MB) is one of the commonly used dyes in the textile industry and can be used as a model pollutant for the textile industry wastewater. In this work, the photocatalytic degradation of MB by synthesized nanoparticles of lanthanum vanadate (LaVO4) was assessed. The effects of pH, initial MB concentration and catalyst dose on the removal performance of MB were investigated and measuring the optimum values of these operational conditions was performed using response surface methodology (RSM). Catalyst dose of 0.43 g/L, initial MB concentration of 5.0 mg/L, and pH of 6.86 were found to be the optimum conditions in reaction time of 60 min. A mathematical model was formed to relate the removal efficiency of MB to the aforementioned operating parameters. The removal efficiency of MB was 91% without any scavengers at a catalyst dose of 0.3 g/L, pH of 7 and initial MB concentration of 10 mg/L. The trapping experiments confirmed the participation of different reactive species in the photo-degradation process. The degradation rates of MB were 91%, 86%, 81%, 77.70% and 72% in five successive runs using LaVO4.

Download Full-text