Influence of biogas-induced mixing on granulation in UASB reactors

Bhunia, Puspendu; Ghangrekar, Makarand M.

doi:10.1016/j.bej.2008.04.016

Cited by 13 publications

(6 citation statements)

References 30 publications

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“…Lumpur biologi berkonsentrasi tinggi ini kerap disebut dengan granul, dan terbentuknya granul di dalam reaktor UASB tergantung pada kecepatan aliran air vertikal (Upflow velocity) dan waktu tinggal (hydraulic retention time/HRT) (3) . Sedangkan proses pemisahan fase padat (lumpur), cair (air limbah) dan gas (biogas) dicapai dengan mendesain gas-liquidsludge separator seperti yang sudah dilakukan (4) .…”

Section: Latar Belakangunclassified

Pengolahan Limbah Industri Pengolahan Ikan Dengan Teknologi Gabungan Upflow Anaerobic Sludge Blanket (UASB)-Wetland

et al. 2019

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Upflow Anaerobic Sludge Blanket (UASB)-Wetland Integrated Technology was applied to treating fish-processing wastewater, taking into account for its simplicity, rapid and economical as well as its capability for reducing pollutant, so the effluent can fulfill effluent standard regulation. The research was carried out by the following steps: identification of wastewater characteristics, WWTP design and construction, and WWTP operational trials. The trials showed that UASB could remove COD average 72.3% and could achieve the highest COD removal of 95.42%, with retention time 24 hours. Wetland could remove COD 52.9% on average and the highest COD removal was 78.22%. Simultaneously UASB-Wetland hybrid Technology could remove 86.25% COD on average, and the highest COD removal was 98.58%. Effluent has compiled the stream standard regulation and can be reused for fish farming.Keywords: fish processing wastewater, high organic wastewater treatment, integrated UASB-Wetland, Anaerobic-Aerobic WWTPABSTRAKTeknologi gabungan Upflow Anaerobic Sludge Blanket (UASB) - wetland diaplikasikan untuk mengolah air limbah industri pengolahan ikan dengan pertimbangan bahwa teknologi ini murah dan mudah pengoperasiannya serta dapat mereduksi polutan sehingga kualitas effluent memenuhi syarat baku mutu. Instalasi pengolahan limbah terdiri dari unit ekualisasi, UASB dan wetland. Hasil uji coba pengolahan dengan UASB menujukkan bahwa penurunan COD rata-rata 72,3% dengan persen penurunan tertinggi mencapai 95,42% dan penurunan COD dengan proses wetland rata-rata 52,9% dengan penurunan tertinggi mencapai 78,22%. Secara keseluruhan proses IPAL hibrid UASB-Wetland mampu menurunkan nilai COD rata-rata sebesar 86,25% dengan penurunan tertinggi mencapai 98,58%. Limbah terolah (effluent) sudah memenuhi baku mutu yang disyaratkan serta dapat dimanfaatkan kembali (reuse) sebagai sumber air untuk budidaya perikanan darat.Kata kunci: air limbah pengolahan ikan, pengolahan limbah organik tinggi, gabungan UASB-wetland, IPAL anaerobik-aerobik

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Section: Latar Belakangunclassified

Pengolahan Limbah Industri Pengolahan Ikan Dengan Teknologi Gabungan Upflow Anaerobic Sludge Blanket (UASB)-Wetland

et al. 2019

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“…Now the UASB systems have been popularly applied in the treatment of high strength industrial wastewaters containing phenolic compounds [6] and those from food processing [9], potato-starch [10], etc. If there's no acclimatized (granular) sludge, the start-up of UASB is usually performed by seeding anaerobically digested sludge [7], [11], [12] or septic tank sludge [13] together with the feeding of organic wastewaters. In general, the seed sludge used for granulation should possess appropriate stability and density in addition to high methanogenic activity, which is usually required to be acclimated and cultivated at first under anaerobic condition.…”

Section: Introductionmentioning

confidence: 99%

“…As pointed out by Bhunia and Ghangrekar [13], the upward shear force is crucial for sludge granulation in UASB, which is mainly determined by the liquid and biogas up-flow velocity, and the concentration of inoculum in the reactor. A successful start-up and stable operation of UASB can be achieved at hydraulic retention time (HRT) < 6 h. In the stable AD system of sewage sludge, the feedstock, i.e., sewage sludge (instead of wastewater) input velocity can't provide a sufficient upward shear force due to its long HRT of > 10 days [15].…”

Section: Introductionmentioning

confidence: 99%

Application of biogas recirculation in anaerobic granular sludge system for multifunctional sewage sludge management with high efficacy energy recovery

et al. 2021

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This study investigated the possibility of biogas recirculation-driven anaerobic granular sludge system for sewage sludge treatment, aiming to develop an energy sufficient and multifunctional anaerobic digestion (AD) system for sewage sludge with biogas upgrading, sludge stabilization and self-aggregation. Results show that biogas recirculation could enhance the CH4 production rate by 31-44% and shorten the lag-phase duration to 0.08-0.2 day with simultaneous increment of CH4 content (> 83% in this study). The reason is mainly associated with the stronger interspecies electron transfer under the biogas recirculation condition. In addition, 37-40% better dewaterability of the digested sludge was achieved, implying the occurrence of self-aggregation of microbial cells induced by biogas recirculation. Energy balance analysis reflects that this sewage sludge treatment system could enhance the net energy recovery by 78-85%. Moreover, almost no obvious influence was noticed on the seed granules' composition and properties. These findings suggest that the biogas recirculation-driven anaerobic granular sludge system could be a promising alternative for sewage sludge treatment, which can improve biogas quality and sludge dewaterability simultaneously towards sludge self-aggregation with no addition of other chemicals.

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“…The satisfactory performance of UASB reactors is mainly due to the formation of compact granular sludge, which ensures high specific methanogenic activity and high settleability [8,[10][11][12], which occurs naturally and spontaneously when the environmental conditions are suitable for self-immobilization of bacteria [13][14][15]. These factors allow the reactor functioning with reduced hydraulic retention times, which implies smaller dimension equipment and lower cost [16,17].…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamics of Uasb Reactor Treating Domestic Wastewater: A Three-Dimensional Numerical Study

Brito

Nunes²,

Magalhães

et al. 2020

Water

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This work performed a three-dimensional numerical study to describe the hydrodynamics of upflow anaerobic sludge blanket reactor treating domestic wastewater. The simulations were made in the commercial software Ansys CFX®. Different inclinations of the gas deflector were considered, to assess its influence on the velocity field inside the reactor. In order to validate the numerical study, we used experimental data regarding the inflow, the inlet and outlet concentrations of the organic matter, the concentration of solids at the liquid-gas interface and at the reactor outlet, and the pressure field inside it. The comparison between the numerical and experimental results demonstrated small differences. The mathematical model used to describe the hydrodynamics flow in the UASB reactor was quite satisfactory since it adequately has reproduced the physical behavior inside the reactor.

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Influence of biogas-induced mixing on granulation in UASB reactors

Cited by 13 publications

References 30 publications

Pengolahan Limbah Industri Pengolahan Ikan Dengan Teknologi Gabungan Upflow Anaerobic Sludge Blanket (UASB)-Wetland

Pengolahan Limbah Industri Pengolahan Ikan Dengan Teknologi Gabungan Upflow Anaerobic Sludge Blanket (UASB)-Wetland

Application of biogas recirculation in anaerobic granular sludge system for multifunctional sewage sludge management with high efficacy energy recovery

Hydrodynamics of Uasb Reactor Treating Domestic Wastewater: A Three-Dimensional Numerical Study

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