The Experts below are selected from a list of 20631 Experts worldwide ranked by ideXlab platform
Shaojun Dong - One of the best experts on this subject based on the ideXlab platform.
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Biochemical Oxygen Demand measurement by mediator method in flow system
Talanta, 2015Co-Authors: Ling Liu, Lu Bai, Junfeng Zhai, Shaojun DongAbstract:Abstract Using mediator as electron acceptor for Biochemical Oxygen Demand (BOD) measurement was developed in the last decade (BODMed). However, until now, no BODMed in a flow system has been reported. This work for the first time describes a flow system of BODMed method (BODMed-FS) by using potassium ferricyanide as mediator and carbon fiber felt as substrate material for microbial immobilization. The system can determine the BOD value within 30 min and possesses a wider analytical linear range for measuring glucose–glutamic acid (GGA) standard solution from 2 up to 200 mg L−1 without the need of dilution. The analytical performance of the BODMed-FS is comparable or better than that of the previously reported BODMed method, especially its superior long-term stability up to 2 months under continuous operation. Moreover, the BODMed-FS has same determination accuracy with the conventional BOD5 method by measuring real samples from a local wastewater treatment plant (WWTP).
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immobilized multi species based biosensor for rapid Biochemical Oxygen Demand measurement
Biosensors and Bioelectronics, 2011Co-Authors: Dengbin Yu, Bailin Zhang, Shaojun DongAbstract:To improve the practicability of rapid Biochemical Oxygen Demand (BOD) method, we proposed a stable BUD sensor based on immobilizing multi-species BODseed for wastewater monitoring in the flow system. The activation time of the biofilm was greatly shortened for the biofilm prepared by BODseed in the organic-inorganic hybrid material. Some influence factors such as temperature, pH, and concentration of phosphate buffer solution (PBS) were investigated in detail in which high tolerance to environment was validated for the BOD sensor permitted a wide pH and PBS concentration ranges. The minimum detectable BOD was around 0.5 mg/l BOD under the optimized 1.0 mg/ml BODseed immobilized concentration. The as-prepared BOD sensor exhibited excellent stability and reproducibility for different samples. Furthermore, the as-prepared BOO biosensor displayed a notable advantage in indiscriminate biodegradation to different organic compounds and their mixture, similar to the character of conventional BOD(5) results. The results of the BUD sensor method are well agreed with those obtained from conventional BOD(5) method for wastewater samples. The proposed rapid BUD sensor method should be promising in practical application of wastewater monitoring. (C) 2010 Elsevier B.V. All rights reserved.
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immobilized multi species based biosensor for rapid Biochemical Oxygen Demand measurement
Biosensors and Bioelectronics, 2011Co-Authors: Changyu Liu, Bailin Zhang, Ling Liu, Jianbo Jia, Shaojun DongAbstract:To improve the practicability of rapid Biochemical Oxygen Demand (BOD) method, we proposed a stable BOD sensor based on immobilizing multi-species BODseed for wastewater monitoring in the flow system. The activation time of the biofilm was greatly shortened for the biofilm prepared by BODseed in the organic-inorganic hybrid material. Some influence factors such as temperature, pH, and concentration of phosphate buffer solution (PBS) were investigated in detail in which high tolerance to environment was validated for the BOD sensor permitted a wide pH and PBS concentration ranges. The minimum detectable BOD was around 0.5 mg/l BOD under the optimized 1.0 mg/ml BODseed immobilized concentration. The as-prepared BOD sensor exhibited excellent stability and reproducibility for different samples. Furthermore, the as-prepared BOD biosensor displayed a notable advantage in indiscriminate biodegradation to different organic compounds and their mixture, similar to the character of conventional BOD(5) results. The results of the BOD sensor method are well agreed with those obtained from conventional BOD(5) method for wastewater samples. The proposed rapid BOD sensor method should be promising in practical application of wastewater monitoring.
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Development of a new biosensor for Biochemical Oxygen Demand
Chinese Journal of Preventive Medicine, 2003Co-Authors: Dong Chang, Xiao-yan Du, Bingquan Wang, Guangjin Cheng, Shaojun DongAbstract:OBJECTIVE: To use a new kind of fixing material, i.e. Sol-Gel organic-inorganic hybridized material to immobilize bacterium to detect Biochemical Oxygen Demand quickly. METHODS: The biosensor was fabricated using a thin film in which Hansenula anomala was immobilized by sol-gel and an Oxygen electrode. The optimum measurement for Biochemical Oxygen Demand was at pH 7.0; 28 degrees C; response time 3 - 12 min. Pure organic compound, sewage and rate of recovery were detected with the biosensor. RESULTS: It shows that the BOD biosensor can be used to detect many organic compounds such as amino acid, glucide. It is suitable to monitor sewage and industrial waste water which has low level alcohols and phenols. The microbial membrane can work 3 months and remain its 70% activity. It is measured that the rate of recovery of BOD is between 90% to 105% in sewage. CONCLUSION: The study confirmed the effectiveness and usefulness of BOD sensor, which is quick, convenient, low cost and reliable with little interference.
Isao Karube - One of the best experts on this subject based on the ideXlab platform.
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Handbook of Biosensors and Biochips - Environmental Biochemical Oxygen Demand and Related Measurement
Handbook of Biosensors and Biochips, 2008Co-Authors: Yoko Nomura, Mifumi Shimomura-shimizu, Isao KarubeAbstract:Biosensors are often used for environmental analyses such as Biochemical Oxygen Demand (BOD) measurements since they can measure or detect pollutants without the special techniques required by conventional methods. Many types of biosensors such as microbial sensors, enzyme sensors, and immunosensors have been developed, and microbial sensors (whole-cell sensors) are very suitable for environmental monitoring because of their stability. This section describes the BOD sensor as the first microbial sensor or whole-cell sensor; a few other related microbial sensors are also discussed. Keywords: Biochemical Oxygen Demand; BOD sensor; microbial sensor; whole-cell sensor; Oxygen electrode; mediator; wastewater; river water
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A chemiluminescence Biochemical Oxygen Demand measuring method.
Analytica Chimica Acta, 2007Co-Authors: Hideaki Nakamura, Yuta Abe, Rui Koizumi, Kyota Suzuki, Yotaro Mogi, Takumi Hirayama, Isao KarubeAbstract:Abstract A new chemiluminescence Biochemical Oxygen Demand (BOD CL ) determining method was studied by employing redox reaction between quinone and Baker's yeast. The measurement was carried out by utilizing luminol chemiluminescence (CL) reaction catalyzed by ferricyanide with oxidized quinone of menadione, and Saccharomyces cerevisiae using a batch-type luminometer. In this study, dimethyl sulfoxide was used as a solvent for menadione. After optimization of the measuring conditions, the CL response to hydrogen peroxide in the incubation mixture had a linear response between 0.1 and 100 μM H 2 O 2 ( r 2 = 0.9999, 8 points, n = 3, average of relative standard deviation; R.S.D. av = 4.22%). Next, a practical relationship between the BOD CL response and the glucose glutamic acid concentration was obtained over a range of 11–220 mg O 2 L −1 (6 points, n = 3, R.S.D. av 3.71%) with a detection limit of 5.5 mg O 2 L −1 when using a reaction mixture and incubating for only 5 min. Subsequently, the characterization of this method was studied. First, the BOD CL responses to 16 pure organic substances were examined. Second, the influences of chloride ions, artificial seawater, and heavy metal ions on the BOD CL response were investigated. Real sample measurements using river water were performed. Finally, BOD CL responses were obtained for at least 8 days when the S. cerevisia e suspension was stored at 4 °C (response reduction, 69.9%; R.S.D. for 5 testing days, 18.7%). BOD CL responses after 8 days and 24 days were decreased to 69.9% and 35.8%, respectively, from their original values (R.S.D. for 8 days involving 5 testing days, 18.7%).
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Development of photocatalytic biosensor for the evaluation of Biochemical Oxygen Demand.
Biosensors and Bioelectronics, 2005Co-Authors: Gab-joo Chee, Yoko Nomura, Kazunori Ikebukuro, Isao KarubeAbstract:Abstract The photocatalytic biosensor of flow system using semiconductor TiO 2 was developed to evaluate Biochemical Oxygen Demand (BOD) levels in river water. Photocatalysis of sample was carried out in a photoreactor with TiO 2 and a 6 W black-light blue fluorescent tube as light source. Sample from a photoreactor outlet was measured by an Oxygen electrode with a biofilm. The sensor response of photocatalytic biosensor was between 5 and 10 min depending on concentration of Biochemical in the samples. At BOD of 1 mg l −1 , the sensor response increased 1.33-fold in comparison with that without photocatalysis. The degradation of tannic acid and humic acid with photocatalysis were 51.8 and 38.4%, respectively. Gum arabic and linear alkylbenzene sulfonate (LAS) were degraded a little, but gave the responses of more than double to the sensor. Free radicals yielded by photocatalysis in a photoreactor did not affect the sensor response because their lifetime is extremely short. Fairly good correlation ( r = 0.983) between the sensor method and the conventional method was obtained for test samples. This biosensor using photocatalytic pretreatment improved the sensitivity.
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Biosensor for the evaluation of Biochemical Oxygen Demand using photocatalytic pretreatment
Sensors and Actuators B-chemical, 2001Co-Authors: Gab-joo Chee, Yoko Nomura, Kazunori Ikebukuro, Isao KarubeAbstract:Abstract A highly sensitive Biochemical Oxygen Demand (BOD) sensor using photocatalytic pretreatment was developed to evaluate low BOD levels in river waters. The photocatalytic oxidation was carried out in a commercial TiO2 as a semiconductor and a 6 W black-light tube as light sources. The photocatalytic oxidation was investigated about the effects of irradiation times, TiO2 concentrations, and pH on the sensor response. The optimal irradiation time was 4 min. TiO2 concentrations gave the optimum response to the BOD sensor at 1% (w/v). The sensor response was increased with increasing pH. The sensor responses obtained by photocatalysis to river samples were higher than those obtained without photocatalysis. A fairly good correlation between the values obtained by the photocatalytic pretreatment method and BOD5 was acquired.
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Optical fiber biosensor for the determination of low Biochemical Oxygen Demand.
Biosensors and Bioelectronics, 2000Co-Authors: Gab-joo Chee, Yoko Nomura, Kazunori Ikebukuro, Isao KarubeAbstract:Abstract An optical fiber biosensor was developed for the evaluation of low Biochemical Oxygen Demand (BOD) values in river waters. Artificial wastewater (AWW) solution was employed as standards for the calibration of the BOD sensor. The response time of the sensor was 15 min, and the optimal BOD response was observed at 30°C, pH 7.0. A linear relationship was obtained between the output voltage and BOD5 values, and the range of determination was 1–10 mg 1−1 BOD. The sensor response was almost not influenced by chloride ion up to 1000 mg 1−1, and also not affected by heavy metal ions (Fe3+, CU2+, Mn2+, Cr3+, Zn2+). The BOD of river waters was estimated by using the optical fiber biosensor, and good correlation between the sensor and BOD5 test was obtained (r2=0.971).
Bailin Zhang - One of the best experts on this subject based on the ideXlab platform.
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immobilized multi species based biosensor for rapid Biochemical Oxygen Demand measurement
Biosensors and Bioelectronics, 2011Co-Authors: Dengbin Yu, Bailin Zhang, Shaojun DongAbstract:To improve the practicability of rapid Biochemical Oxygen Demand (BOD) method, we proposed a stable BUD sensor based on immobilizing multi-species BODseed for wastewater monitoring in the flow system. The activation time of the biofilm was greatly shortened for the biofilm prepared by BODseed in the organic-inorganic hybrid material. Some influence factors such as temperature, pH, and concentration of phosphate buffer solution (PBS) were investigated in detail in which high tolerance to environment was validated for the BOD sensor permitted a wide pH and PBS concentration ranges. The minimum detectable BOD was around 0.5 mg/l BOD under the optimized 1.0 mg/ml BODseed immobilized concentration. The as-prepared BOD sensor exhibited excellent stability and reproducibility for different samples. Furthermore, the as-prepared BOO biosensor displayed a notable advantage in indiscriminate biodegradation to different organic compounds and their mixture, similar to the character of conventional BOD(5) results. The results of the BUD sensor method are well agreed with those obtained from conventional BOD(5) method for wastewater samples. The proposed rapid BUD sensor method should be promising in practical application of wastewater monitoring. (C) 2010 Elsevier B.V. All rights reserved.
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immobilized multi species based biosensor for rapid Biochemical Oxygen Demand measurement
Biosensors and Bioelectronics, 2011Co-Authors: Changyu Liu, Bailin Zhang, Ling Liu, Jianbo Jia, Shaojun DongAbstract:To improve the practicability of rapid Biochemical Oxygen Demand (BOD) method, we proposed a stable BOD sensor based on immobilizing multi-species BODseed for wastewater monitoring in the flow system. The activation time of the biofilm was greatly shortened for the biofilm prepared by BODseed in the organic-inorganic hybrid material. Some influence factors such as temperature, pH, and concentration of phosphate buffer solution (PBS) were investigated in detail in which high tolerance to environment was validated for the BOD sensor permitted a wide pH and PBS concentration ranges. The minimum detectable BOD was around 0.5 mg/l BOD under the optimized 1.0 mg/ml BODseed immobilized concentration. The as-prepared BOD sensor exhibited excellent stability and reproducibility for different samples. Furthermore, the as-prepared BOD biosensor displayed a notable advantage in indiscriminate biodegradation to different organic compounds and their mixture, similar to the character of conventional BOD(5) results. The results of the BOD sensor method are well agreed with those obtained from conventional BOD(5) method for wastewater samples. The proposed rapid BOD sensor method should be promising in practical application of wastewater monitoring.
Syed Mustakim Ali Shah - One of the best experts on this subject based on the ideXlab platform.
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Application of adaptive neuro-fuzzy inference system (ANFIS) to estimate the Biochemical Oxygen Demand (BOD) of Surma River
Journal of King Saud University - Engineering Sciences, 2017Co-Authors: A. A.masrur Ahmed, Syed Mustakim Ali ShahAbstract:This paper describes the application of adaptive neuro-fuzzy inference system (ANFIS) to estimate the Biochemical Oxygen Demand (BOD) of Surma River of Bangladesh. The data sets consist of 10 water quality parameters which include pH, alkalinity (mg/L as CaCO3), hardness, total solids (TS), total dissolved solids (TDS), potassium (K+), PO4−3(mg/l), NO3−(mg/l), BOD (mg/l) and DO (mg/l). The performance of the ANFIS models was assessed through the correlation coefficient (R), mean squared error (MSE), mean absolute error (MAE) and Nash model efficiency (E). Study results show that the adaptive neuro-fuzzy inference system is able to predict the Biochemical Oxygen Demand with reasonable accuracy, suggesting that the ANFIS model is a valuable tool for river water quality estimation. The result shows that, ANFIS-I has a high prediction capacity of BOD compared with ANFIS-II. The results also suggest that ANFIS method can be successfully applied to establish river water quality prediction model.
Changyu Liu - One of the best experts on this subject based on the ideXlab platform.
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immobilized multi species based biosensor for rapid Biochemical Oxygen Demand measurement
Biosensors and Bioelectronics, 2011Co-Authors: Changyu Liu, Bailin Zhang, Ling Liu, Jianbo Jia, Shaojun DongAbstract:To improve the practicability of rapid Biochemical Oxygen Demand (BOD) method, we proposed a stable BOD sensor based on immobilizing multi-species BODseed for wastewater monitoring in the flow system. The activation time of the biofilm was greatly shortened for the biofilm prepared by BODseed in the organic-inorganic hybrid material. Some influence factors such as temperature, pH, and concentration of phosphate buffer solution (PBS) were investigated in detail in which high tolerance to environment was validated for the BOD sensor permitted a wide pH and PBS concentration ranges. The minimum detectable BOD was around 0.5 mg/l BOD under the optimized 1.0 mg/ml BODseed immobilized concentration. The as-prepared BOD sensor exhibited excellent stability and reproducibility for different samples. Furthermore, the as-prepared BOD biosensor displayed a notable advantage in indiscriminate biodegradation to different organic compounds and their mixture, similar to the character of conventional BOD(5) results. The results of the BOD sensor method are well agreed with those obtained from conventional BOD(5) method for wastewater samples. The proposed rapid BOD sensor method should be promising in practical application of wastewater monitoring.