scholarly journals Optimization of a Completely Mixed Anaerobic Biofilm Reactor (CMABR), Based on Brewery Wastewater Treatment

Water ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 606
Author(s):  
Dan Zhong ◽  
Kai Zhu ◽  
Wencheng Ma ◽  
Jinxin Li ◽  
Kefei Li ◽  
...  
Keyword(s):  
Rotational Speed ◽  
High Throughput Sequencing ◽  
Hydraulic Retention Time ◽  
Oxygen Demand ◽  
Biofilm Reactor ◽  
Cod Removal ◽  
Total Alkalinity ◽  
Optimum Conditions ◽  
Brewery Wastewater ◽  
Processing Efficiency

In this study, brewery wastewater was used as the treatment in exploring the optimal conditions and maximum processing efficiency of the completely mixed anaerobic biofilm reactor (CMABR) under the conditions of hydraulic retention time (HRT) (18 h, 24 h, and 30 h) with a rotational speed (70 rpm, 100 rpm, and 130 rpm) and influent total alkalinity (TA) (20 mmol/L, 25 mmol/L, and 30 mmol/L), which was measured by the response surface methodology (RSM). The results indicated that the maximum chemical oxygen demand (COD) removal ratio was achieved under the following conditions: HRT of 21.42 h, rotational speed of 101.34 rpm, and influent TA of 25.22 mmol/L. Analysis by scanning electron microscope (SEM) showed that the microorganisms were successfully immobilized on the polyurethane fillers before the reactor began operation. High-throughput sequencing indicated that Methanothrix and Methanospirillum were the dominant contributors for COD removal in the CAMBR under these optimum conditions.

scholarly journals Effect of Hydraulic Retention Time and Filling Time on Simultaneous Biodegradation of Phenol, Resorcinol and Catechol in a Sequencing Batch Reactor

2013 ◽  
Vol 39 (2) ◽  
pp. 69-80 ◽  
Author(s):  
Chandrakant Thakur ◽  
Indra Deo Mall ◽  
Vimal Chandra Srivastava
Keyword(s):  
Retention Time ◽  
Sequencing Batch Reactor ◽  
Hydraulic Retention Time ◽  
Batch Reactor ◽  
Oxygen Demand ◽  
Cod Removal ◽  
Synthetic Wastewater ◽  
Optimum Conditions ◽  
Heating Value ◽  
Filling Time

Abstract In the present study, treatment of synthetic wastewater containing phenol, resorcinol and catechol was studied in a sequencing batch reactor (SBR). Parameters such as hydraulic retention time (HRT) and filling time have been optimized to increase the phenol, resorcinol, catechol and chemical oxygen demand (COD) removal efficiencies. More than 99% phenol, 95% resorcinol and 96% catechol and 89% COD removal efficiency was obtained at optimum conditions of HRT = 1.25 d and fill time = 1.5 h. The heating value of the sludge was found to be 12 MJ/kg. The sludge can be combusted to recover its energy value.

scholarly journals Optimization and Modelling of Chemical Oxygen Demand Removal by ANAMMOX Process Using Response Surface Methodology

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Ali Jalilzadeh ◽  
Ramin Nabizadeh ◽  
Alireza Mesdaghinia ◽  
Aliakbar Azimi ◽  
Simin Nasseri ◽  
...  
Keyword(s):  
Chemical Oxygen Demand ◽  
Response Surface ◽  
Oxygen Demand ◽  
Cod Removal ◽  
Ammonium Concentration ◽  
Ammonium Oxidation ◽  
Optimum Conditions ◽  
Surface Method ◽  
Anammox Process ◽  
Modelling And Optimization

A systematic model for chemical oxygen demand (COD) removal using the ANAMMOX (Anaerobic AMMonium OXidation) process was provided based on an experimental design. At first, the experimental data was collected from a combined biological aerobic/anaerobic reactor. For modelling and optimization of COD removal, the main parameters were considered, such as COD loading, ammonium, pH, and temperature. From the models, the optimum conditions were determined as COD 97.5 mg/L, ammonium concentration equal to 28.75 mg-N/L, pH 7.72, and temperature 31.3°C. Finally, the analysis of the optimum conditions, performed by the response surface method, predicted COD removal efficiency of 81.07% at the optimum condition.

Optimization of Conditions for Wastewater Treatment and Kinetics Establishment by Yeast

2013 ◽  
Vol 726-731 ◽  
pp. 2441-2448
Author(s):  
Chen Song ◽  
Jiang Ping Li ◽  
Yi Xin Sun ◽  
Hai Long ◽  
Wei Wu
Keyword(s):  
Oxygen Demand ◽  
Cod Removal ◽  
Optimum Conditions ◽  
Kinetics Parameters ◽  
Biological Water ◽  
Orthogonal Experiments ◽  
The Difference ◽  
Pre Treatment ◽  
Biological Water Treatment ◽  
Kinetics Of

Yeast SP1 was selected from the three strains to remove chemical oxygen demand (COD) in wastewater from refining part of N, 2, 3-trimethyl-2-isopropyl butanamide (WS-23). The effects of some factors on the degradation for wastewater from refining part of WS-23 were investigated and the optimum conditions for biological water treatment by yeast SP1 were obtained through orthogonal experiments. The results indicate that this wastewater can be treated directly by yeast without any pre-treatment and the best conditions are as follows: inoculum is 10% (v/v), reaction temperature at 30 °C for 48 h. Under these conditions, the total COD removal efficiency can reach 87.11%. In addition, according to Monod model, the kinetics parameters were obtained from the experiments by determining influent COD (S0), effluent COD (Se), biomass (X) and the kinetics of COD removal was established, furthermore, the difference of experimental and calculated values was within 1 hour by testing.

Grease biodegradation: is bioaugmentation more effective than natural populations for start-up?

1996 ◽  
Vol 34 (5-6) ◽  
pp. 303-308 ◽  
Author(s):  
Leopoldo Mendoza-Espinosa ◽  
Tom Stephenson
Keyword(s):  
Activated Sludge ◽  
Natural Populations ◽  
Oxygen Demand ◽  
Cod Removal ◽  
Batch Reactors ◽  
Optimum Conditions ◽  
Start Up ◽  
Degradation Rates ◽  
Activated Sludge Reactor ◽  
Micro Organisms

Investigations were undertaken in order to compare the grease degradation rates for a natural population of acclimatised activated sludge micro-organisms with a commercial bioaugmentation product (bioadditive) under optimum conditions in laboratory-scale batch reactors. Lard was chosen as the source of grease because it contains the fatty acids more commonly found in urban wastewaters. During acclimatisation, the bioadditive reactor achieved a slightly better chemical oxygen demand (COD) removal efficiency than the activated sludge reactor. Therefore, under optimum conditions, activated sludge was able to degrade grease at nearly the same rate as a bioadditive solution. Moreover, the bioadditive and the activated sludge reactors had very similar kinetics of COD removal under different grease concentrations. It was concluded that the use of natural activated sludge micro-organisms was sufficient to acclimatise biological processes to removing grease.

Performance of Moving Bed Biofilm Reactor Treating Beverages Wastewater Using Cosmo Ball Coated With and Without Activated Carbon

2020 ◽  
Vol 17 (2) ◽  
pp. 700-703
Author(s):  
J. Nur Dhamirah Sakinah ◽  
M. I. Aida Isma
Keyword(s):  
Activated Carbon ◽  
Hydraulic Retention Time ◽  
Oxygen Demand ◽  
Total Suspended Solid ◽  
Suspended Solid ◽  
Biofilm Reactor ◽  
Growth Media ◽  
High Concentration ◽  
Moving Bed ◽  
Carbon Absorption

Beverages industry producing large amount of wastewater during production and the cleaning process. The effluent discharge needs to be treated as it is harmful to the environment due to its high concentration of organic substances. In this study, the aim is to investigate the moving bed biofilm reactor’s performance in treating beverages wastewater with (CMBAC) and without activated carbon (CMB). The surface of cosmo ball was coated with granular activated carbon used as the attached growth media in the reactor. 18 L of MBBR using cosmo ball as media was setup at flowrate and hydraulic retention time of 1.5 L/hr and 8 hours, respectively. The reactor was maintained at pH 7 with minimum dissolved oxygen concentration of 2 mg/L. Experiment was repeated by using CMBAC as media. The best percentage removal achieved for chemical oxygen demand and total suspended solid was by MBBR using CMBAC with 92.7% and 83.4%, respectively. It should be noted that absorption of contaminant by activated carbon absorption enhanced the organic removal in the reactor.

Enhanced degradation of paracetamol by UV-C supported photo-Fenton process over Fenton oxidation

2011 ◽  
Vol 64 (12) ◽  
pp. 2433-2438 ◽  
Author(s):  
B. Manu ◽  
S. Mahamood
Keyword(s):  
Oxygen Demand ◽  
Cod Removal ◽  
Fenton Oxidation ◽  
Fenton Process ◽  
Objective Functions ◽  
Optimum Conditions ◽  
Experimental Conditions ◽  
Paracetamol Concentration ◽  
Fenton Oxidation Process ◽  
Uv C

For the treatment of paracetamol in water, the UV-C Fenton oxidation process and classic Fenton oxidation have been found to be the most effective. Paracetamol reduction and chemical oxygen demand (COD) removal are measured as the objective functions to be maximized. The experimental conditions of the degradation of paracetamol are optimized by the Fenton process. Influent pH 3, initial H2O2 dosage 60 mg/L, [H2O2]/[Fe2+] ratio 60 : 1 are the optimum conditions observed for 20 mg/L initial paracetamol concentration. At the optimum conditions, for 20 mg/L of initial paracetamol concentration, 82% paracetamol reduction and 68% COD removal by Fenton oxidation, and 91% paracetamol reduction and 82% COD removal by UV-C Fenton process are observed in a 120 min reaction time. By HPLC analysis, 100% removal of paracetamol is observed at the above optimum conditions for the Fenton process in 240 min and for the UV-C photo-Fenton process in 120 min. The methods are effective and they may be used in the paracetamol industry.

Application of a novel Polydopamine@EDTA@Fe3O4 material for efficient simultaneous nitrogen and nickel removal in an immobilized biofilm reactor

2020 ◽  
Vol 18 (5-6) ◽  
Author(s):  
Junfeng Su ◽  
Jian Liu ◽  
Dongxin Guo
Keyword(s):  
Public Health ◽  
Removal Efficiency ◽  
High Throughput Sequencing ◽  
Hydraulic Retention Time ◽  
Biofilm Reactor ◽  
Polluted Water ◽  
Simultaneous Removal ◽  
Biofilm Reactors ◽  
Nickel Removal ◽  
Mining Wastewater

AbstractHigh NO3− and Ni(II) concentrations in mining wastewater pose a risk to public health. In this study, the NO3− and Ni(II) removal process was performed using a novel PDA@EDTA@Fe3O4 immobilization carrier. The effects of hydraulic retention time (HRT; 6, 8, and 10 h), along with Fe(II) (10, 15, and 20 mg/L) and Ni(II) (10, 20, and 30 mg/L) influent concentrations on the simultaneous removal of NO3− and Ni(II) were investigated in immobilized biofilm reactors. Results showed that the highest NO3− removal efficiency (97.78%) and Ni(II) removal efficiency (91.21%) were obtained in the immobilized biofilm reactor with PDA@EDTA@Fe3O4 under the conditions of 10 h HRT, influent Fe(II) concentrations of 20 mg/L and Ni(II) concentrations of 10 mg/L. High-throughput sequencing results confirmed that Cupriavidus sp.CC1 plays a major role in the functioning of the immobilized reactor. This process provides the potential for effective treatment of NO3− and Ni(II) polluted water.

scholarly journals A Highly Packed Biofilm Reactor with Cycle Cleaning for the Efficient Treatment of Rural Wastewater

Water ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 369
Author(s):  
Yanan Luan ◽  
Chen Qiu ◽  
Yaoxian Li ◽  
Weichang Kang ◽  
Jianhua Zhang ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Rural Areas ◽  
High Throughput Sequencing ◽  
Inorganic Nitrogen ◽  
Oxygen Demand ◽  
Biofilm Reactor ◽  
Efficient Treatment ◽  
Removal Capacity ◽  
Treatment Processes ◽  
Rural Wastewater

Biological treatment processes perform satisfactory in wastewater treatment, but the relatively high cost and complicated maintenance limit its application in rural areas. In this study, a highly packed biofilm reactor (HPBR), with a 90% packing ratio of carriers in the bioreactor, was designed for rural wastewater treatment. The results showed that the removal rates for chemical oxygen demand (COD) and ammonia were 3.04 ± 1.81 kg/m3/d and 0.49 ± 0.18 kg/m3/d, respectively. Besides, the removal efficiency of total inorganic nitrogen (TIN) was 35.4% by the HPBR. The removal capacity of the HPBR is higher than other reported systems with fewer operational costs and maintenance. High-throughput sequencing was applied to further investigate the kinetics and principals. Microorganisms capable of simultaneous nitrification-denitrification were found to be dominant species in the HPBR system, which indicated that the nitrogen removal in HPBR is governed by simultaneous nitrification-denitrification. These findings suggest that HPBR can be used as an efficient reactor for rural wastewater treatment, demonstrating its feasibility in real applications.

scholarly journals Biological treatment of a synthetic dairy wastewater in a sequencing batch biofilm reactor: Statistical modeling using optimization using response surface methodology

2011 ◽  
Vol 17 (4) ◽  
pp. 485-495 ◽  
Author(s):  
A.A.L. Zinatizadeh ◽  
Y. Mansouri ◽  
A. Akhbari ◽  
S. Pashaei
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Oxygen Demand ◽  
Biomass Concentration ◽  
Biofilm Reactor ◽  
Cod Removal ◽  
Dairy Wastewater ◽  
Volume Index ◽  
Aeration Time ◽  
Sequencing Batch Biofilm Reactor

In this study, the interactive effects of initial chemical oxygen demand (CODin), biomass concentration and aeration time on the performance of a lab-scale sequencing batch biofilm reactor (SBBR) treating a synthetic dairy wastewater were investigated. The experiments were conducted based on a central composite design (CCD) and analyzed using response surface methodology (RSM). The region of exploration for treatment of the synthetic dairy wastewater was taken as the area enclosed by the influent comical oxygen demand (CODin (1000, 3000 and 5000 mg/l)), biomass concentration (3000, 5000 and 7000 mg VSS/l) and aeration time (2, 8 and 18 h) boundaries. Two dependent parameters were measured or calculated as response. These parameters were total COD removal efficiency and sludge volume index (SVI). The maximum COD removal efficiencies (99.5%) were obtained at CODin, biomass concentration and aeration time of 5000 mg COD/l, 7000 mg VSS/l and 18 h, respectively. The present study provides valuable information about interrelations of quality and process parameters at different values of the operating variables.

scholarly journals Application of alternative carriers without protected surface in moving bed biofilm reactor for domestic wastewater treatment

2022 ◽  
Author(s):  
Bruno de Oliveira Freitas ◽  
Luan de Souza Leite ◽  
Maria Teresa Hoffmann ◽  
Antonio Wagner Lamon ◽  
Luiz Antonio Daniel
Keyword(s):  
Wastewater Treatment ◽  
Dissolved Inorganic Carbon ◽  
Oxygen Demand ◽  
Domestic Wastewater ◽  
Biofilm Reactor ◽  
Cod Removal ◽  
Moving Bed ◽  
Corrugated Tube ◽  
Domestic Wastewater Treatment ◽  
Protected Surface

Abstract Biological reactors with immobilized biomass on free carriers have provided new perspectives for wastewater treatment, once they reduce the system size and increase the treatment capacity. In this study, the performance of three Moving Bed Biofilm Reactors (MBBR) using different carriers (with and without protected surface area) were evaluated for domestic wastewater treatment in continuous flow. Each MBBRs (i.e., R1, R2, and R3) was filled at a ratio of 50% with high-density polyethylene carriers with different characteristics: both R1-K1 and R2-Corrugated tube with protected surface and R3-HDPE flakes without protected surface. Chemical oxygen demand (COD) removal of 80 ± 5.0, 80 ± 3.5, and 78 ± 2.4% was achieved by R1, R2, and R3, respectively. The oxygen uptake by biofilm attached on the carriers was 0.0079 ± 0.0013, 0.0033 ± 0.0015, and 0.0031 ± 0.0026 μg DO·mm−2 for the K1, corrugated tube, and HDPE flakes, respectively. No significant differences were observed between the performance of the three MBBRs in terms of physico-chemical parameters (alkalinity, pH, and dissolved inorganic carbon) and COD removal. Results showed that the carrier type and its characteristics (total area and with/without protected area) did not affect the organic matter removal. Thus, the carrier without a protected surface in MBBR could be a promising low-cost option for domestic wastewater treatment.

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