Alkaline and acid thermal hydrolysis of biological excess sludge in sequencing batch reactor

2016 ◽  
Vol 57 (50) ◽  
pp. 23603-23609 ◽  
Author(s):  
Maryam Pazoki ◽  
Peyman Dalaei
Keyword(s):  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Thermal Hydrolysis ◽  
Excess Sludge ◽  
Hydrolysis Of

scholarly journals Modelling of sequencing batch reactor operating at various aeration modes

2019 ◽  
Vol 252 ◽  
pp. 05013
Author(s):  
Grzegorz Łagód ◽  
Adam Piotrowicz ◽  
Piotr Gleń ◽  
Jakub Drewnowski ◽  
Fabrizio Sabba
Keyword(s):  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Significant Degree ◽  
Excess Sludge ◽  
Effluent Quality ◽  
First Case ◽  
Treated Sewage ◽  
Do Concentration ◽  
Reactor Operating ◽  
Operation Cycle

The presented study involved designing a computer model of a sequencing batch reactor (SBR) at laboratory scale. The data pertaining to the technical aspects of the bioreactor and quality indicators of wastewater constituted the input for the employed simulation tool, i.e. GPS-X software package. The results of a simulation involving a 12-hour operation cycle are presented in this work; each cycle included 6 phases: filling, mixing, aeration, settling, decantation and idling (wasting of excess sludge). The simulations were carried out using two different modes of aeration. Concentration of dissolved oxygen (DO) was maintained at constant level of 2 mgO2/L using the PID controller in the first case. On the other hand, variation of DO concentration was employed in the aeration stage of the second variant, which was achieved using appropriately elaborated set point of oxygen concentration, considering the specific intervals in oxygen supply. The changes observed in DO concentration varied from 0.5 to 2.5 mgO2/L. This research proved that the second variant, involving variation of DO concentration, was characterised by reduced levels of pollution indicators in treated sewage, as well as lower consumption of electricity, both of which contributed towards improving the effluent quality and resulted in significant degree of dephosphatation.

Sequencing batch reactor enhances bacterial hydrolysis of starch promoting continuous bio-hydrogen production from starch feedstock

2009 ◽  
Vol 34 (20) ◽  
pp. 8549-8557 ◽  
Author(s):  
Shing-Der Chen ◽  
Yung-Chung Lo ◽  
Kuo-Shing Lee ◽  
Tian-I. Huang ◽  
Jo-Shu Chang
Keyword(s):  
Hydrogen Production ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Hydrolysis Of

Biological phosphorus removal with different organic substrates in an anaerobic/aerobic sequencing batch reactor

1997 ◽  
Vol 35 (1) ◽  
pp. 161-168 ◽  
Author(s):  
A. Carucci ◽  
M. Majone ◽  
R. Ramadori ◽  
S. Rossetti
Keyword(s):  
Phosphorus Removal ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Energy Sources ◽  
Organic Substrates ◽  
Biological Phosphorus Removal ◽  
Anaerobic Conditions ◽  
And Storage ◽  
Biological Phosphorus ◽  
Hydrolysis Of

Experimental work was carried out with a lab-scale SBR, whose operation was divided into three runs: I run (glucose + acetate feed, 3′ fill), II run (only glucose feed, 3′ fill), III run (only glucose feed, 60′ fill). The results show that the bacteria growing in alternating anaerobic/aerobic systems can remove organic substrates under anaerobic conditions even without using the hydrolysis of polyphosphates or the transformation of glycogen into poly-hydroxyalkanoates as the energy sources for the uptake and storage of substrate. However, in the case of acetate plus glucose feed, EBPR can be steadily established with typical PP-bacteria like metabolism even if most of the COD removal takes place under not truly anaerobic conditions.

Full scale experiences with small sequencing batch reactor plants in Bavaria

2000 ◽  
Vol 41 (1) ◽  
pp. 89-96 ◽  
Author(s):  
B. Helmreich ◽  
D. Schreff ◽  
P.A. Wilderer
Keyword(s):  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Quantitative Information ◽  
Suspended Solid ◽  
Solid Loading ◽  
Excess Sludge ◽  
Difficult Situation ◽  
Actual Performance ◽  
System Failures ◽  
Design Engineers

The number of sequencing batch reactor (SBR) plants in operation world-wide has been growing, but scientific process evaluation has not been adequately executed, and very little quantitative information is available on the actual performance of those systems. Trial and error approaches are prevailing. Consequently design engineers and water authorities are left in a rather difficult situation. To get an overview of the performance of SBR plants in operation in the State of Bavaria, Germany, the performance of the existing municipal SBRs has been investigated. The plants investigated comply with the discharge regulations, but in some cases only with the aid of secondary polishing ponds. Most of the system failures observed were caused by inadequate actions of the operators. Energy consumption was in the range of 56 kWh/(PE, a), and excess sludge production varied between 0.25 and 0.81 kg/kgCOD depending on the influent suspended solid loading.

Modelling the effect of the antimicrobial tylosin on the performance of an anaerobic sequencing batch reactor

2008 ◽  
Vol 57 (11) ◽  
pp. 1699-1704 ◽  
Author(s):  
T. Shimada ◽  
J. L. Zilles ◽  
E. Morgenroth ◽  
L. Raskin
Keyword(s):  
Volatile Fatty Acids ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Synthetic Wastewater ◽  
Solid Mass ◽  
Performance Measurements ◽  
Treatment Performance ◽  
Anaerobic Sequencing Batch Reactor ◽  
Syntrophic Bacteria ◽  
Hydrolysis Of

A laboratory-scale anaerobic sequencing batch reactor (ASBR) was fed a synthetic wastewater containing glucose to study the effects of the antimicrobial tylosin on treatment performance. Measurements of methane, volatile fatty acids, and COD concentrations suggested that the addition of 1.67 mg/L and 167 mg/l of tylosin to the synthetic wastewater inhibited propionate oxidizing syntrophic bacteria and aceticlastic methanogens. The latter is presumed to be an indirect effect. A modified version of the IWA Anaerobic Digestion Model No. 1 (ADM1) with extensions for microbial storage and hydrolysis of reserve carbohydrates, and tylosin liquid–solid mass transfer and inhibition adequately described the dynamic profiles observed in the ASBR.

Maximising biogas in anaerobic digestion by using engine waste heat for thermal hydrolysis pre-treatment of sludge

2006 ◽  
Vol 54 (5) ◽  
pp. 101-108 ◽  
Author(s):  
B. Pickworth ◽  
J. Adams ◽  
K. Panter ◽  
O.E. Solheim
Keyword(s):  
Anaerobic Digestion ◽  
Sequencing Batch Reactor ◽  
Waste Heat ◽  
Batch Reactor ◽  
Thermal Hydrolysis ◽  
Waste Heat Boiler ◽  
Design Build ◽  
Pre Treatment ◽  
Technical Solutions ◽  
Very High

Dublin's Ringsend WWTP was designed to serve a population of approximately 1.2 million p.e. with a sludge production of 37,000 dry tonnes per year after upgrading to full secondary treatment. Several technical solutions were put forward as part of a design, build, finance and operate (DBFO) competition, with the chosen solution being a proposal by Black and Veatch for a combination of sequencing batch reactor (SBR) technology and anaerobic digestion with Cambi thermal hydrolysis pre-treatment (THP). The THP plant was built by Cambi and handed over to B&V in 2002. The plant is now operated by Celtic Anglian Water. In September 2004 a test was carried out on the mass and energy balance of the plant following 2 years of operation and is detailed in this paper. The process enables digestion at very high dry solids feed and low hydraulic retention time. The plant was built with three digesters of 4,250 m3 each and is fed with hydrolysed sludge at 11% DS. There are four no. 1 MW Jenbacher engines operating mainly on biogas. Each pair of engines is fitted with a waste heat boiler with a capacity of one tonne steam per hour. These boilers have sufficient capacity to provide 80% of the steam required for the THP, which in turn provides all the heat for the subsequent digestion in the form of hydrolysed feed. There are two main biogas boilers for top up steam and other uses of the biogas including thermal oxidation of concentrated odours.

Peranan BOD biosensor untuk proses optimasi pengolahan limbah sintetik di SBR

2019 ◽  
Vol 1 (2) ◽  
pp. 1
Author(s):  
Lindawati Lindawati
Keyword(s):  
Biochemical Oxygen Demand ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Oxygen Demand

Sebuah Sequencing Batch Reactor (SBR) digunakan untuk mengevaluasi peranan Biochemical Oxygen Demand (BOD) biosensor dalam proses optimasi proses pengolahan nutrien karbon, nitrogen dan fosfat. Hasil penelitian menunjukkan bahwa BOD biosensor dapat dipergunakan untuk penentuan karbon organik, sehingga reduksi siklus SBR dapat dilakukan dan efisiensi proses meningkat. Pola konsumsi karbon organik ditemukan dengan adanya ‘tanda diam’ pada fase anoksik/ anaerobik, di mana dari tanda ini, fase aerobik dapat segera dimulai. Reduksi durasi siklus SBR dari 8 jam menjadi 4 jam meningkatkan efiesiensi pengolahan C, N dan P yang meningkat pula (hampir dua kali lebih tinggi).

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