Commissioning and operational experiences for the 160ML/d Woodman Point Sequencing Batch Reactor - control of settleability and denitrification using bioselectors

2004 ◽  
Vol 50 (7) ◽  
pp. 213-220
Author(s):  
W.K. Bagg ◽  
M.C. Newland ◽  
H. Rule
Keyword(s):  
Activated Sludge ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Treatment Plant ◽  
Biological Phosphorus Removal ◽  
Storage Mechanism ◽  
Treatment Processes ◽  
Cycle Plays ◽  
Continuous Technology ◽  
Short Time

Achieving and maintaining good biomass settling characteristics is a critical process design objective for any activated sludge wastewater treatment plant (WWTP), whether intermittent or continuous technology. One way of ensuring good sludge settleability in intermittent WWTPs is the incorporation of bioselectors in the process. A bioselector is essentially a small discrete reactor volume designed primarily for carbon absorption, in which activated sludge organisms are exposed to a high substrate concentration for a relatively short time. It is normally very much smaller than an anoxic zone and the activated sludge recycle is only a fraction of that typically adopted in continuous plants. With proper conditioning, recycled biomass rapidly absorbs and stores soluble organic wastewater components before transfer to the main treatment basin. This absorption and storage mechanism, and careful management of aeration throughout the intermittent treatment cycle, plays a crucial role in many subsequent growth and treatment processes, including sludge floc formation, denitrification and biological phosphorus removal. This paper examines some design considerations, and reviews the benefits of bioselectors by reference to the commissioning and initial operation of the new 160ML/d Woodman Point Sequencing Batch Reactor in Perth, Western Australia. The applicability of bioselectors in continuous plants is discussed.

Cold Climate Sequencing Batch Reactor Biological Phosphorus Removal – Results 1991-92

1993 ◽  
Vol 28 (10) ◽  
pp. 275-282 ◽  
Author(s):  
S. Marklund
Keyword(s):  
Cycle Time ◽  
Phosphorus Removal ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Treatment Plant ◽  
Cold Climate ◽  
Small Scale ◽  
Aeration Tank ◽  
Biological Phosphorus Removal ◽  
Biological Phosphorus

The aeration tank in a small scale wastewater treatment plant was converted to a sequencing batch reactor (SBR) with a maximum volume of approx. 27 m3. The main purpose of this study was to examine low temperature biological phosphorus removal (BPR). The wastewater temperature varied during the study between 3 and 8°C, with a water temperature at or below 5°C during 7 months of the year. The SBR unit has been in operation from the end of 1989, the study period discussed here covered July 1991 - December 1992. SBR cycle time was varied between 6 and 12 hours, giving a total daily treatment capacity of between 18 and 36 m3. The influent biological oxygen demand - 7 days (BOD7) levels varied between 88 and 165 mg/l. Corresponding phosphorus levels were between 3.10 and 9.55 mg/l The mean effluent level of phosphorus was 1.57 mg/l and the BOD7 value was 23 mg/l. This gives a mean total phosphorus reduction of 74% and a BOD7 reduction of 81 %. During the study, mean supernatant suspended solids (SS) levels were quite high, at around 36 mg/l. This high SS level contributed a major part of both outlet phosphorus as well as BOD7 value. Effluent soluble values for phosphorus and BOD7 were 0.79 mg/l and 9 mg/l. The supernatant SS component of BOD7 and phosphorus increased at lower temperatures. It was not possible to reduce or balance this increase by increased cycle time or increased settling time within the maximum cycle time available (12 hours). Stable low supernatant phosphorus and BOD7 levels are thus to a large degree controlled by the effluent SS level. A maximum of 20 mg/l supernatant SS is necessary to reach target supernatant values of less than 1 mg/l of phosphorus and 15 mg/l of BOD7.

pH: Keyfactor in the Biological Phosphorus Removal Process

1994 ◽  
Vol 29 (7) ◽  
pp. 71-74 ◽  
Author(s):  
G. J. F. Smolders ◽  
M. C. M. van Loosdrecht ◽  
J. J. Heijnen
Keyword(s):  
Activated Sludge ◽  
Phosphorus Removal ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Glycogen Metabolism ◽  
Activated Sludge Process ◽  
Biological Phosphorus Removal ◽  
Anaerobic Conditions ◽  
Biochemical Mechanisms ◽  
Biological Phosphorus

Experiments have been performed, using a sequencing batch reactor, to examine the effect of pH on biological phosphorus removal in the activated sludge process. The results, which indicate that glycogen metabolism occurs during anaerobic conditions, are useful in elucidating the biochemical mechanisms involved in phosphorus-removal, and have potential implications for systems such as Phostrip.

scholarly journals Design of Sequencing Batch Reactor (SBR) Treatment Plant for Abattoir Wastewater (A Case of Apa Mmini Stream)

2020 ◽  
pp. 15-21
Author(s):  
Ogbebor Daniel ◽  
Ndekwu, Benneth Onyedikachukwu
Keyword(s):  
Activated Sludge ◽  
Sequencing Batch Reactor ◽  
Settling Velocity ◽  
Batch Reactor ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Treatment Method ◽  
Design Parameters ◽  
Sequence Batch Reactor ◽  
The Impact

Aim: The study aimed at designing a wastewater treatment method for removal of (Biological Oxygen Demand) BOD5 using Sequencing batch reactor (SBR). Study Design: SBR functions as a fill-and-draw type of activated sludge system involving a single complete-mix reactor where all steps of an activated sludge process take place. Methodology: The intermittent nature of slaughterhouse wastewaters favours batch treatment methods like sequence batch reactor (SBR). Attempts to remediate the impact of this BOD5 on the stream, led to the design of a sequence batch reactor which was designed to treat slaughterhouse effluent of 1000 L. Results: The oxygen requirement for effective removal of BOD5 to 95% was determined to be 21.10513 kgO2/d, while L:B  of 3:1 was considered for the reactor. Also, air mixing pressure for the design was 0.16835 bar, while settling velocity was . Conclusion: To ensure proper treatment of BOD5 load of the slaughterhouse, a sequencing Batch reactor of 1000 litre carrying capacity was designed. For effective operation of this design, the pressure exerted by the mixing air was 0.16835 bar which was far greater than the pressure exerted by the reactor content and the nozzle. Settling velocity of 0.0003445 m/s for 0.887 hrs was required for the reactor to be stable and a theoretical air requirement of 1.6884 m³/d was calculated. Hence the power dissipated by the rising air bubbles to ensure efficient mixing of oxygen in the reactor was calculated as 26530003.91 Kilowatts. With these design parameters, the high BOD5 load downstream of the river can be treated to fall below the FMEnv recommended limit of 50 mg/l.

Strategies for improvement of sludge quality and process performance of sequencing batch reactor plant treating municipal and tannery wastewater

1998 ◽  
Vol 38 (4-5) ◽  
pp. 69-77 ◽  
Author(s):  
M. Kabacinski ◽  
B. Hultman ◽  
E. Plaza ◽  
J. Trela
Keyword(s):  
Wastewater Treatment ◽  
Sequencing Batch Reactor ◽  
Wastewater Treatment Plants ◽  
Batch Reactor ◽  
Treatment Plant ◽  
Tannery Wastewater ◽  
Nitrification Rate ◽  
Process Performance ◽  
Biological Phosphorus Removal ◽  
Process Technology

Advanced process technology has been implemented at newly built wastewater treatment plants in Central and Eastern Europe. The wastewater treatment plant (WWTP) in Nowy Targ, Poland, the largest in Europe based on sequencing batch reactor (SBR) technology, has shown that newly constructed plants must be integrated into the system of water, wastewater, and sludge management in the city and the region. A significant supply of tannery wastewater with increasing chromium concentrations in the influent to the WWTP has resulted in many operational problems related mainly to sludge treatment. Evaluation of the process performance and sludge handling for 2 years of plant operation is presented. Efficient biological phosphorus removal with concentrations lower than 1 mg/l in effluent is obtained. Nitrogen removal is characterised by a low nitrification rate and a high denitrification rate. Problems with sludge handling are related to high excess sludge production, insufficient sludge stabilisation, low sludge dewatering efficiency and high chromium content in the sludge. Different strategies for sludge handling improvement are discussed. Sludge should be treated as a resource, which is recirculating in an eco-cycle with recovery of nutrients and energy. Such a process is proposed for the WWTP in Nowy Targ.

The bioaugmentation of sequencing batch reactor sludges for biological phosphorus removal

1997 ◽  
Vol 35 (1) ◽  
pp. 19-26 ◽  
Author(s):  
E. Belia ◽  
P. G. Smith
Keyword(s):  
Activated Sludge ◽  
Nitrogen Removal ◽  
Pure Culture ◽  
Phosphorus Removal ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Sewage Treatment Plant ◽  
Biological Phosphorus Removal ◽  
Conventional Activated Sludge ◽  
Biological Phosphorus

The development of enhanced biological phosphorus removal (EBPR) through the bioaugmentation of a conventional activated sludge was studied. The objectives of the study were to evaluate the phosphorus removal capability of a sequencing batch reactor (SBR) when started with conventional activated sludge and augmented with a pure culture of Acinetobacter lwoffii. The effect of the addition of the pure culture on the reactor start up time, the settling properties of the sludge and on COD and nitrogen removal was also investigated. The effect of the removal of up to 70% of the bioaugmented biomass and its substitution with unconditioned sludge from a conventional sewage treatment plant was determined. This study has demonstrated that bioaugmentation can convert a conventional sewage works activated sludge to an EBPR sludge in 14 days. The sludge produced shows resilience to influent phosphate fluctuations, low D.O. and biomass replacement. The COD and nitrogen removal capabilities of the sludge and its settling properties are not affected by the addition of the pure culture.

Cultivation, granulation and characteristics of anaerobic ammonium-oxidizing sludge in sequencing batch reactor

2006 ◽  
Vol 6 (6) ◽  
pp. 71-79 ◽  
Author(s):  
B.L. Hu ◽  
P. Zheng ◽  
Q. Mahmood ◽  
H.F. Qian ◽  
D.L. Wu
Keyword(s):  
Activated Sludge ◽  
Shock Loading ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Bacterial Species ◽  
Treatment Plant ◽  
Granular Sludge ◽  
Pilot Scale ◽  
Anaerobic Sequencing Batch Reactor ◽  
Nitrite Removal

Anaerobic sequencing batch reactor (SBR) was started-up by inoculating the nitrifying activated sludge. After an operation of 72 d, the bioreactor reached at steady state with ammonia and nitrite removal percentages higher than 95%. During operation, the sludge granulated in the reactor. The morphology and internal structure of sludge granules changed conspicuously, the density increased while the color changed from khaki to red. The average granular diameter grew from 1.2 to 3.69 mm, and its settling velocity accelerated from 107.68 to 118.49 m/h. Sludge granulation improved the tolerance to hydraulic shock loading, and reduced sludge washout (TSS < 0.028 g/L). The dominant bacterial communities (filamentous and cocci) in nitrifying activated sludge were replaced by irregular shaped ANAMMOX bacterial species gradually. An increase of ANAMMOX rate was achieved with the increasing granular diameter. SBR is a useful reactor to cultivate ANAMMOX granular sludge, while granular ANAMMOX sludge thus developed can be used as seeding sludge in a pilot-scale or full scale wastewater treatment plant.

Biological phosphorus removal at temperatures from 3 to 10 °C — a full-scale study of a sequencing batch reactor unit

1994 ◽  
Vol 21 (1) ◽  
pp. 81-88 ◽  
Author(s):  
Stefan Marklund ◽  
Stig Morling
Keyword(s):  
Phosphorus Removal ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Cold Climate ◽  
The Arctic ◽  
Biological Phosphorus Removal ◽  
Reactor Unit ◽  
Biological Phosphorus

Low temperature biological phosphorus removal technology was tested at a small village wastewater treatment plant near the Arctic circle. An aeration basin in a conventional activated sludge step was retrofitted to a sequencing batch reactor with a maximum volume of approximately 27 m3. The study period was November 1989 to June 1991. The wastewater temperature varied between 3 and 10 °C during one full year and was below 5 °C during approximately 240 days of the year. A total sequencing batch reactor cycle time of 6–12 hours produced a phosphorus reduction of 70–80%. During the same time, biochemical oxygen demand (BOD7) reductions varied between 70% and 90%. These reductions were achieved at supernatant suspended solid concentrations of 20–30 mg/L. Effluent soluble phosphorus concentrations were usually lower than 1.0 mg/L at water temperatures down to 5 °C. At 4 °C, a sharp increase to greater than 2.0 mg/L was evident. Supernatant soluble BOD7 was less than 8 mg/L and was found to be independent of temperature. Key words: biological wastewater phosphorus removal, sequencing batch reactor, cold climate.

Use of computers for process design analysis and control: sequencing batch reactor application

1997 ◽  
Vol 35 (1) ◽  
pp. 95-104 ◽  
Author(s):  
Asher Brenner
Keyword(s):  
Activated Sludge ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Treatment Plant ◽  
Design Analysis ◽  
Computer Assisted ◽  
Operating Cycle ◽  
Operational Strategies ◽  
Conventional Activated Sludge ◽  
And Control

Computers have become a vital part of every modern wastewater treatment plant. They can be used for design, analysis, and control of the treatment process. Mathematical modelling and simulation of various process configurations, load conditions, and operational strategies lead to better understanding and improved design and operation. Computer assisted analysis of process performance and automatic control of plant units aid reduce expenses related to energy, chemicals, and man power. Stringent disposal constraints imposed in most modern countries require application of sophisticated computerized control systems to ensure high quality effluents. The sequencing batch reactor system is similar to the conventional activated sludge process in its ability to achieve biological removal of organic carbon and nutrients by a single sludge. However, due to the non-steady-state nature of the process, and to the large substrate and nutrient gradients occurring during the operating cycle, some modifications in the traditional activated sludge waste characterization and process modelling should be considered.

Simplicispira limi sp. nov., isolated from activated sludge

2007 ◽  
Vol 57 (1) ◽  
pp. 31-34 ◽  
Author(s):  
Shipeng Lu ◽  
Seung Hyun Ryu ◽  
Bok Sil Chung ◽  
Young Ryun Chung ◽  
Woojun Park ◽  
...  
Keyword(s):  
Activated Sludge ◽  
Phosphorus Removal ◽  
Sequencing Batch Reactor ◽  
Novel Species ◽  
Batch Reactor ◽  
Molecular Characteristics ◽  
Rrna Gene ◽  
Biological Phosphorus Removal ◽  
16S Rrna Gene Sequences ◽  
Biological Phosphorus

A Gram-negative, motile, rod-shaped bacterium, designated strain EMB325T, was isolated from activated sludge that performed enhanced biological phosphorus removal in a sequencing batch reactor. The predominant fatty acids of strain EMB325T were summed feature 3 (C16 : 1 ω7c and/or iso-C15 : 0 2-OH), C16 : 0, C18 : 1 ω7c and C18 : 1 ω7c 11-methyl. The strain contained phosphatidylethanolamine and diphosphatidylglycerol as polar lipids. The G+C content of the genomic DNA was 63.3 mol%. The major quinone was Q-8. Phylogenetic analysis of 16S rRNA gene sequences showed that strain EMB325T formed a phyletic lineage with members of the genus Simplicispira and was most closely related to Simplicispira psychrophila LMG 5408T and Simplicispira metamorpha DSM 1837T with similarities of 98.1 and 97.9 %, respectively. Levels of DNA–DNA relatedness between strain EMB325T and S. psychrophila LMG 5408T and S. metamorpha DSM 1837T were 28 and 23 %, respectively. On the basis of chemotaxonomic data and molecular characteristics, strain EMB325T is considered to represent a novel species within the genus Simplicispira, for which the name Simplicispira limi sp. nov. is proposed. The type strain is EMB325T (=KCTC 12608T=DSM 17964T).

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