CFD Analysis of Slurry Flow in an Anaerobic Digester

Siswantara, Ahmad Indra; Daryus, Asyari; Darmawan, Steven; Gun, Gun; Gunadi, R.; Camalia, Rovida; Timur, Jakarta

doi:10.14716/ijtech.v7i2.2977

Cited by 12 publications

(6 citation statements)

References 8 publications

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“…Reservoir -ferment will be soon built for the phase II as well, thus the initial period of retention of the ferment shall take approx. 30 days, whilst in the second phase it shall decrease [13].…”

Section: Project Goalsmentioning

confidence: 93%

Economy of Biogas Plants

Kremljak¹

2017

DAAAM Proceedings

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At a time when worldwide energy demand grows, the care for greener environment grows as well. Due to the extremely high energy potential, along the safety and cleanness of its operations, the biogas plant as an energy solution is deemed a great investment in the future. Frequently in that regard we face the question concerning the scope of the investment and the time needed for its return. This paper gives an example of an investment in a biogas plant and the exploitation of renewable sources, which is simultaneously an example of circular economy. The biogas plant has a power of 1 MW, which along the existing concession prices and the resulting economy justifies the validity of the decision to invest while ensuring a cleaner environment. Invested funds shall be returned within a maximum of 6 years, reflecting the extremely dynamic business process.

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Section: Project Goalsmentioning

confidence: 93%

Economy of Biogas Plants

Kremljak¹

2017

DAAAM Proceedings

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“…The construction of prototypes of aeration devices and their experimental verification, especially at the initial stage, can be largely replaced by the use of computer simulations of computational fluid dynamics -CFD [17,[24][25][26]. With the use of computer simulations, it is possible to obtain the knowledge of the mechanisms and hydraulic processes occurring in the bioreactor chamber in a short time, taking into account how the aeration systems work based on real data under different operating conditions [27,28].…”

Section: Introductionmentioning

confidence: 99%

Modeling and optimizations of mixing and aeration processes in bioreactors with activated sludge

Zaburko

Łagód

Widomski

et al. 2021

J. Phys.: Conf. Ser.

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Mixing aimed at homogenization of the volume of bioreactors with the activated sludge is of great importance for the proper course of the wastewater treatment process. It affects both the efficiency of pollutants removal and the properties of the activated sludge related to its sedimentation. The mixing process in bioreactors can be carried out in different ways. In batch bioreactors in the aeration phase or flow bioreactors in aerobic chambers, mixing is carried out through aeration systems. These systems should aerate the activated sludge flocs for efficient biological treating of wastewater, as well as effectively homogenize the volume of the bioreactor. Hence, it is important to choose such a design of the aeration system and its operation settings that provide the amount of air ensuring the exact amount of oxygen for the implementation of technological processes, counteract sedimentation of sludge at the bottom of the reactor, are reliable as well as economical in operation (demand of electric energy). The paper presents the model studies aimed at optimization of the design and settings of aeration and mixing systems used in active sludge bioreactors.

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“…The appropriate pipe geometry for working fluid is reasonable to facilitate the flow efficiency. Siswantara et al conducted a simulation study on the first step to predicting the slurry flow in an anaerobic digester (Siswantara et al, 2016). The study was conducted with a numerical simulation method to achieve the correct planning basis so that the development of the digester was carried out efficiently.…”

Section: Introductionmentioning

confidence: 99%

Rheology Characteristics and Critical Velocity of Particle-laden Flow Affected by Three-lobed Spiral Pipe

Mau

Yanuar²,

Pamitran³

2020

IJTech

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The use of piping systems for fluid transportation is increasing because it is considered the most effective method. Newtonian and non-Newtonian fluid flows are suitable for piping systems, and non-Newtonian, particle-laden fluids are more complex due to various factors. Deposition is one of the problems that must continue to be investigated because of the effects of flow efficiency. The purpose of this study was to investigate the performance of the three-lobe spiral pipe effect. Working fluids in several variations of concentration weight (Cw 20%, 30%, and 40%) were used. Test pipe with a length of 1550 mm and consisting of spiral pipe P/Di = 7 and a circular pipe with an inner diameter of 25.4 mm were used. The circular pipe was used to investigate the rheological workings of fluid. Both pipes were used to investigate the particle effects. Using scanning electron microscopy, 1-μm to 5-μm slurry particles were obtained from the mud eruption source at Semau Island, Kupang, Indonesia. The critical velocity value of the spiral pipe was lower than the circular pipe, so the spiral pipe is highly effective for slurry transportation.

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CFD Analysis of Slurry Flow in an Anaerobic Digester

Cited by 12 publications

References 8 publications

Economy of Biogas Plants

Economy of Biogas Plants

Modeling and optimizations of mixing and aeration processes in bioreactors with activated sludge

Rheology Characteristics and Critical Velocity of Particle-laden Flow Affected by Three-lobed Spiral Pipe

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