Measurement of biochemical oxygen demand of the leachates
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Biochemical oxygen demand (BOD) of the leachates originally from the different types of landfill sites was studied based on the data measured using the two manometric methods. The measurements of BOD using the dilution method were carried out to assess the typical physicochemical and biological characteristics of the leachates together with some other parameters. The linear regression analysis was used to predict rate constants for biochemical reactions and ultimate BOD values of the different leachates. The rate of a biochemical reaction implicated in microbial biodegradation of pollutants depends on the leachate characteristics, mass of contaminant in the leachate, and nature of the leachate. Character of leachate samples for BOD analysis of using the different methods may differ significantly during the experimental period, resulting in different BOD values. This work intends to verify effect of the different dilutions for the manometric method tests on the BOD concentrations of the leachate samples to contribute to the assessment of reaction rate and microbial consumption of oxygen.
KeywordsBiochemical oxygen demand Biochemical reaction rate Leachate Linear regression analysis Respirometric method
Slope of the curve (t/BODt)1/3 versus t (in litres per milligramme)
Interception of the curve (t/BODt)1/3 versus t (in litres day per milligramme)
Consumption of oxygen in the dilution water (in milligrammes per litre)
BOD value measured after the 5-day incubation period in the dark at 20 °C (in milligrammes per litre)
BOD value reading affected due to the drop of pressure in the dilution water bottle (in milligrammes per litre)
BOD value reading affected due to the drop of pressure in the water sample bottle (in milligrammes per litre)
BOD value at time t (in milligrammes per litre)
Consumption of oxygen in the water sample (in milligrammes per litre)
Dilution factor (dimensionless)
Biochemical reaction rate constant (in per day)
Oxygen equivalent of the organic biodegradable remaining (in milligrammes per litre)
Oxygen equivalent of organic biodegradable remaining at time zero or ultimate BOD that is the maximum oxygen consumption possible when the biodegradable organics in the leachate have been completely degraded (in milligrammes per litre)
Oxygen equivalent of the organic biodegradable remaining at time t (in milligrammes per litre)
Time (in days)
The study used the financial supports from Indonesian Ministry of Public Works (IMPW). The financial supports provided by IMPW were greatly appreciated.
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