title: Immobilized multi-species based biosensor for rapid biochemical oxygen demand measurement.
abstract: 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.
authors.affiliation: State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China.
authors.forename: Changyu
authors.initials: C
authors.lastname: Liu
authors.forename: Chao
authors.initials: C
authors.lastname: Ma
authors.forename: Dengbin
authors.initials: D
authors.lastname: Yu
authors.forename: Jianbo
authors.initials: J
authors.lastname: Jia
authors.forename: Ling
authors.initials: L
authors.lastname: Liu
authors.forename: Bailin
authors.initials: B
authors.lastname: Zhang
authors.forename: Shaojun
authors.initials: S
authors.lastname: Dong
mesh_terms: D001420:Bacteria, Aerobic / Q000378:metabolism*; D001422:Bacterial Adhesion; D001681:Biological Assay / Q000295:instrumentation*; D057919:Biological Oxygen Demand Analysis / Q000295:instrumentation*; D015374:Biosensing Techniques / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D010100:Oxygen / Q000032:analysis*; D014871:Water Microbiology
chemical_list: D010100:Oxygen