Instrumentation, Control and Automation for full-scale Sequencing Batch Reactor Plants

2006 ◽  
Vol 1 (4) ◽  
Author(s):  
H. Steinmetz ◽  
J. Wiese
Keyword(s):  
Data Acquisition ◽  
Supervisory Control ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Fixed Time ◽  
Full Scale ◽  
Treatment Efficiency ◽  
Process Flexibility ◽  
Sequential Control ◽  
Scada Systems

The sequencing batch reactor (SBR) technology possesses a high process flexibility and treatment efficiency. Unfortunately, up to now most SBR plants are still using fixed time-based sequential control (TSC), which can not react flexibly. Therefore, this paper will focus on instrumentation, control and automation (ICA) for SBR plants, because with the help of modern supervisory control and data acquisition (SCADA) systems and dynamic RTC it is possible to operate SBR plants much more effectively.

A process-dependent real-time controller for sequencing batch reactor plants: results of full-scale operation

2006 ◽  
Vol 53 (4-5) ◽  
pp. 143-150 ◽  
Author(s):  
J. Wiese ◽  
J. Simon ◽  
H. Steinmetz
Keyword(s):  
Real Time ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Full Scale ◽  
Treatment Efficiency ◽  
Real Time Control ◽  
Reactor Plant ◽  
Research Project ◽  
Time Control ◽  
N Treatment

This paper presents results of a research project, in which a process-dependent real-time control (RTC) strategy for a sequencing batch reactor plant was realised in full-scale. The cycle controller is based on NH4 analysers, NO3 probes, TSS probes and sludge level probes. With this new RTC strategy it was possible to increase the treatment capacity by 50%. By implementation of the new controller the TN, TP and NH4-N treatment efficiency could be improved significantly, too. The treatment efficiency concerning COD is comparable.

COD removal of phenolic wastewater by biological activated carbon-sequencing batch reactor in the presence of 2,4-DCP

2000 ◽  
Vol 42 (5-6) ◽  
pp. 171-178 ◽  
Author(s):  
S.-R. Ha ◽  
L. Qishan ◽  
S. Vinitnantharat
Keyword(s):  
Activated Carbon ◽  
Retention Time ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Cod Removal ◽  
High Loading ◽  
Treatment Efficiency ◽  
Biological Activated Carbon ◽  
Treatment Performance ◽  
Phenolic Wastewater

Treatment performance of COD in the presence of 2,4-dichlorophenol (2,4-DCP) was explored by using a biological activated carbon-sequencing batch reactor (BAC-SBR) system. Two COD levels of basic substrate were synthesized with a mixture of phenol and 2,4-dichlorophenol. Although effluent concentration was increased with reduction of sludge retention time (SRT) from 8-days to 3-days, treatment efficiency was indicated more than 90% of COD in all SRTs applied. Reactors operated with acclimated sludge could be expected to cope with quite high loading of inhibitory substances.

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

2001 ◽  
Vol 43 (3) ◽  
pp. 107-114 ◽  
Author(s):  
R.-F. Yu ◽  
S.-L. Liaw ◽  
B.-C. Cho ◽  
S.-J. Yang
Keyword(s):  
Ph Monitoring ◽  
Batch Reactor ◽  
Dynamic Control ◽  
Fixed Time ◽  
Treatment Costs ◽  
Small Scale ◽  
Time Varying ◽  
Flow Rates ◽  
Substrate Removal ◽  
Sequential Control

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.

scholarly journals Aerobic Sludge Granulation in a Full-Scale Sequencing Batch Reactor

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Jun Li ◽  
Li-Bin Ding ◽  
Ang Cai ◽  
Guo-Xian Huang ◽  
Harald Horn
Keyword(s):  
Extracellular Polymeric Substances ◽  
Sequencing Batch Reactor ◽  
Denaturing Gradient Gel Electrophoresis ◽  
Batch Reactor ◽  
Treatment Plant ◽  
Full Scale ◽  
Granule Formation ◽  
Sludge Granulation ◽  
Aerobic Sludge ◽  
Raw Wastewater

Aerobic granulation of activated sludge was successfully achieved in a full-scale sequencing batch reactor (SBR) with 50,000 m3 d−1for treating a town’s wastewater. After operation for 337 days, in this full-scale SBR, aerobic granules with an average SVI30of 47.1 mL g−1, diameter of 0.5 mm, and settling velocity of 42 m h−1were obtained. Compared to an anaerobic/oxic plug flow (A/O) reactor and an oxidation ditch (OD) being operated in this wastewater treatment plant, the sludge from full-scale SBR has more compact structure and excellent settling ability. Denaturing gradient gel electrophoresis (DGGE) analysis indicated thatFlavobacteriumsp., uncultured beta proteobacterium, unculturedAquabacteriumsp., and unculturedLeptothrixsp. were just dominant in SBR, whereas uncultured bacteroidetes were only found in A/O and OD. Three kinds of sludge had a high content of protein in extracellular polymeric substances (EPS). X-ray fluorescence (XRF) analysis revealed that metal ions and some inorganics from raw wastewater precipitated in sludge acted as core to enhance granulation. Raw wastewater characteristics had a positive effect on the granule formation, but the SBR mode operating with periodic feast-famine, shorter settling time, and no return sludge pump played a crucial role in aerobic sludge granulation.

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