The effects of seed sludge and hydraulic retention time on the production of hydrogen from a cassava processing wastewater and glucose mixture in an anaerobic fluidized bed reactor

2014 ◽  
Vol 39 (25) ◽  
pp. 13118-13127 ◽  
Author(s):  
Paula Rúbia Ferreira Rosa ◽  
Samantha Christine Santos ◽  
Isabel Kimiko Sakamoto ◽  
Maria Bernadete Amâncio Varesche ◽  
Edson Luiz Silva
Keyword(s):  
Fluidized Bed ◽  
Retention Time ◽  
Hydraulic Retention Time ◽  
Fluidized Bed Reactor ◽  
Production Of Hydrogen ◽  
Seed Sludge ◽  
Anaerobic Fluidized Bed Reactor

Design and Startup of an Anaerobic Fluidized Bed Reactor

1999 ◽  
Vol 40 (8) ◽  
pp. 63-70 ◽  
Author(s):  
P. Marín ◽  
D. Alkalay ◽  
L. Guerrero ◽  
R. Chamy ◽  
M. C. Schiappacasse
Keyword(s):  
Fluidized Bed ◽  
Hydraulic Retention Time ◽  
Fluidized Bed Reactor ◽  
Gas Production ◽  
Beach Sand ◽  
Organic Load ◽  
Load Rate ◽  
Anaerobic Fluidized Bed Reactor ◽  
Bed Expansion

A 10 1 anaerobic fluidized bed reactor (AFBR) was designed and constructed, using beach sand as the solid support for the biomass. Considering the complexity of this type of system, previously to the startup, several experiences were performed in a series of minireactors, such as: determination of the bed expansion and the feed distribution. The startup was made increasing gradually the organic load rate (OLR), using the alkalinity ratio (α) and the removal of the organic load, as mg/l of COD, as leading parameters. The system attained a COD removal of over 85%, for an OLR of 3.4 [kg COD/m3·d]. The best removal of 92% was obtained at an OLR of 1.04 [kg COD/m3·d], with a hydraulic retention time (HRT) of 12 hours. The best gas production of 1.8 [m3 of biogas/m3·d], equivalent to a production of 0.16 [m3/kg CODremoved], was obtained at an (HRT) of 4.8 hours. The best startup results were obtained using Ethanol as the Carbon source.

scholarly journals EFFECTS OF ORGANIC LOADING RATE AND HYDRAULIC RETENTION TIME ON TREATMENT OF PHENOLIC WASTEWATER IN AN ANAEROBIC IMMOBILIZED FLUIDIZED BED REACTOR

2014 ◽  
Vol 22 (1) ◽  
pp. 40-49 ◽  
Author(s):  
Roya Pishgar ◽  
Ghasem D. Najafpour ◽  
Bahram Navayi Neya ◽  
Zeinab Bakhshi ◽  
Nafise Mousavi
Keyword(s):  
Fluidized Bed ◽  
Retention Time ◽  
Hydraulic Retention Time ◽  
Biogas Production ◽  
Fluidized Bed Reactor ◽  
Phenol Concentration ◽  
Total Alkalinity ◽  
Organic Loading ◽  
Phenolic Wastewater ◽  
Removal Efficiencies

Treatability of phenolic wastewater in an anaerobic immobilized fluidized bed reactor (AIFBR) in consequence of stepwise increment in phenolic load as well as decrease in hydraulic retention time (HRT) was investigated. The experimental data indicated that high degradation efficiencies of phenol and COD in the bioreactor at low HRTs and high organic loading rates were obtained. At constant HRT of 16 h with increase in influent phenol concentration from 98 to 630 mg/l, the average phenol and COD removals were 96 and 88%, respectively. However, further increase in phenol concentration in the feed stream to 995 mg/l resulted in decrease in phenol and COD removal efficiencies to 84 and 79%, respectively. For influent phenol concentration of 995 mg/l, the biogas production rate of 4.55 l/l.d was obtained. As HRT decreased from 3 to 0.15 day, the system showed high stability; influent phenol and COD were removed and reached to average values of 17 and 173 mg/l correspond to the removal efficiencies of about 97 and 90.5%, respectively. The bioreactor experienced a failure with further decrease in HRT to 0.1 day. Biogas production was gradually decreased from 7.04 l/l.d at HRT of 3 days to 2.23 l/l.d at HRT of 0.1 days. The value of the ratio of volatile fatty acids to total alkalinity (VFAs/TA) ranged from 0.03 to 0.24 during the entire course of operation.

scholarly journals Evaluasi Hydraulic Retention Time (Hrt) Terhadap Removal Chemical Demand (Cod) Dalam Pengolahan Air Lindi Menggunakan Aerobic Fluidized Bed Reactor (AFBR)

2018 ◽  
Vol 2 (2) ◽  
pp. 28
Author(s):  
Elli Prasetyo
Keyword(s):  
Steady State ◽  
Chemical Oxygen Demand ◽  
Fluidized Bed ◽  
Retention Time ◽  
Hydraulic Retention Time ◽  
Oxygen Demand ◽  
Fluidized Bed Reactor ◽  
Start Up

Sampah merupakan masalah utama disetiap kota besar di indonesia. Tumpukan sampah menghasilkan air lindi dengan kandungan organik yang tinggi. Beban organik yang tinggi dan meningkatnya laju alir lindi memerlukan kolam aerasi yang luas untuk mengolah lindi. Salah satu metode pengolahan air lindi yang tepat dan efisien dengan menggunakan proses anaerobik. Anaerobic Fludized Bed Reaktor (AFBR) merupakan salah satu reactor anaerobic dengan efisiensi tinggi. Zeolit digunakan sebagai media imobilisasi bakteri untuk meningkatkan efisiensi pengolahan secara anaerobic pada reactor AFBR. Penyesuaian model kinetika dilakukan pada tahap awal menggunakan data reactor fase batch untuk diaplikasikan pada AFBR fase continyu. Model kinetika untuk mengevaluasi pengaruh Hydraulic Retention Time (HRT) terhadap removal Chemical Oxygen Demand (COD) AFBR dengan zeolit sebagai media imobilisasi. Eksperimen dilakukan dalam tiga fase, yaitu fase batch, fase start-up, dan fase steady state. Fase batch bertujuan untuk menentukan konstanta model kinetika. Fase start-up bertujuan untuk memverifikasi konstanta model yang ditentukan dengan data batch pada AFBR saat masa start up. Fase steady state bertujuan untuk mengevaluasi pengaruh HRT selama reactor beroperasi. Reaktor AFBR mencapai kondisi steady state tercepat pada HRT 10 dengan removal COD 73,40%. Hal ini membuktikan bahwa mikroorganisme tidak mengalami washout bahkan pada laju beban organik yang lebih tinggi sehingga mikroorganisme dapat menstabilkan populasinya. Data menunjukkan bahwa sCOD effluen (SCODeff) lindi TPA Piyungan mencapai nilai terendah pada kisaran 2.000 – 2.500 mg/L, Produksi biogas mengikuti fluktuasi nilai sCODeff. Pada kondisi steady state, nilai ini tidak dipengaruhi oleh HRT.

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