Dynamic control of a continuous-inflow SBR with time-varying influent loading

The conventional sequential control of Sequencing Batch Reactor (SBR) is designed with fixed time periods for various operation phases. However, both of the flow rates and qualities of influent vary over time, therefore, a big capacity of wastewater equalization unit is required to cope with influen...

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Bibliographic Details
Published in:Water science and technology 2001-01, Vol.43 (3), p.107-114
Main Authors: YU, R.-F, LIAW, S.-L, CHO, B.-C, YANG, S.-J
Format: Article
Language:English
Subjects:
Applied sciences
Batch reactors
Biological and medical sciences
Biological treatment of waters
Bioreactors
Biotechnology
Capacity
Control
Costs
Dynamic control
Environment and pollution
Environmental engineering
Equalization
Exact sciences and technology
Experiments
Flow rates
Fundamental and applied biological sciences. Psychology
General purification processes
Hydrogen-Ion Concentration
Industrial applications and implications. Economical aspects
Inflow
Influents
Nitrogen
Nitrogen - isolation & purification
Nutrient removal
On-line systems
Online Systems
Optimization
Organic Chemicals - isolation & purification
Personal computers
Pollution
Process controls
Removal
Retention
sequencing batch reactors
Sequential control
Time Factors
Waste Disposal, Fluid - instrumentation
Waste Disposal, Fluid - methods
Waste Disposal, Fluid - statistics & numerical data
Wastewater
Wastewater treatment
Wastewaters
Water treatment and pollution
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Summary:The conventional sequential control of Sequencing Batch Reactor (SBR) is designed with fixed time periods for various operation phases. However, both of the flow rates and qualities of influent vary over time, therefore, a big capacity of wastewater equalization unit is required to cope with influent variability. Such an equalization unit increases the total treatment costs of the system, especially in a small-scale wastewater treatment system. Moreover, in using a SBR treating a time-varying influent loading with conventional sequential control, the system performance cannot be optimized. This paper presents the application of on-line ORP and pH monitoring to dynamically control a continuous-inflow SBR with time-varying loading of influent flow rates and water qualities. Experiential results show that the dynamic controlled SBR revealed not only achieved better substrate removal efficiencies, but also reduced treatment costs.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.2001.0125