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eISSN: 2083-5906
ISSN: 1230-1485
ISSN: 1230-1485
ORIGINAL RESEARCH
Integrated Determination of Chemical Oxygen
Demand and Biochemical Oxygen Demand
1
Department of Environmental Engineering, Beijing Institute of Petrochemical Technology, Beijing, China
2
College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, China
3
Beijing Changzheng Mechanical Equipment Manufacture Co. Ltd, Beijing, China
Submission date: 2020-02-10
Final revision date: 2020-05-09
Acceptance date: 2020-05-14
Online publication date: 2020-11-26
Publication date: 2021-02-05
Corresponding author
Yanhe Han
Department of Environmental Engineering, Beijing Institute of Petrochemical Technology, China
Department of Environmental Engineering, Beijing Institute of Petrochemical Technology, China
Pol. J. Environ. Stud. 2021;30(2):1785-1794
KEYWORDS
integrated determinationactivated sludgechemical oxygen demandbiochemical oxygen demandBox-Behnken Design
TOPICS
ABSTRACT
Chemical oxygen demand (COD) and biochemical oxygen demand (BOD) with irreplaceable
significance are comprehensive indicators for evaluating water quality. Effective control of water
pollution depends on the rapid determination of these indicators. In the study, the rapid determination
of BOD was carried out by activated sludge aeration degradation method. The BOD quantification was
achieved by measuring the COD change before and after microbial degradation (BODΔCOD). Singlefactor
experiment was employed to investigate the effect of operating parameters on the determination
of BOD. In addition, the interactions of main variables were evaluated by Box-Behnken Design, and
the results showed that the interaction term of reaction time and initial pH value had a significant
effect. The optimum conditions for determination of BOD were reaction time of 273.68 min, dosage of
activated sludge of 8.72 mL, and pH of 7.18. Under the optimal conditions, the correlation experiment
showed that BODΔCOD and BOD5 exhibited a good linear relationship in the concentration range of
0-500 mg/L, and the correlation coefficient R2 was 0.996. It indicated that the method realized not only
the rapid determination of BOD, but also the integrated determination of COD and BOD.
CONFLICT OF INTEREST
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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| eISSN: | 2083-5906 |
| ISSN: | 1230-1485 |
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