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Effect of organic carbon shock loading on endogenous denitrification in sequential batch reactors.
F Rodríguez Mora1, G Ferrara de Giner, A Rodríguez Andara
1Dpt. de Ingenieria Sanitaria y Ambiental, Facultad de Ingenieri;a, Universidad Central de Venezuela, Caracas 50656, Venezuela.
Bioresource Technology
|March 6, 2003
Summary
Sequential batch reactors (SBRs) effectively treat sewage using endogenous biological denitrification, showing resilience to moderate organic shock loading. These systems achieved approximately 80% nitrate elimination and a denitrification rate of 0.87 mg/g/h.
Area of Science:
- Environmental Engineering
- Wastewater Treatment Technologies
- Biotechnology
Background:
- Sequential Batch Reactors (SBRs) are widely used for wastewater treatment.
- Endogenous biological denitrification is a key process for nitrogen removal.
- Understanding reactor performance under stress conditions like organic shock loading is crucial.
Purpose of the Study:
- To evaluate the performance of SBRs in treating sewage via endogenous biological denitrification.
- To investigate the impact of different aeration periods on reactor efficiency.
- To examine the behavior of SBRs when subjected to organic shock loading.
Main Methods:
- Operation of three laboratory-scale SBRs with molasses as the carbon source and nitrate as the nitrogen source.
- Varying aeration periods (0, 15, and 30 minutes) across the reactors.
- Introduction of a threefold increase in organic matter concentration (shock loading) to assess reactor stability.
Main Results:
- SBRs demonstrated adequate resilience to moderate organic shock loading.
- Approximately 80% nitrate elimination was achieved.
- The average denitrification rate was recorded at 0.87 mg/g/h.
Conclusions:
- SBRs are robust systems capable of handling organic shock loads during endogenous denitrification.
- The operational parameters, including aeration, influence treatment efficiency.
- The study confirms the viability of SBRs for effective nitrogen removal from wastewater.