Sludge granulation and efficiency of phase separator in UASB reactor treating combined industrial effluent

2007 ◽  
Vol 19 (5) ◽  
pp. 553-558 ◽  
Author(s):  
Abdullah Yasar ◽  
Nasir Ahmad ◽  
Muhammad Nawaz Chaudhry ◽  
Aamir Amanat Ali Khan
Keyword(s):  
Industrial Effluent ◽  
Uasb Reactor ◽  
Phase Separator ◽  
Sludge Granulation

Study on Mechanism of Anaerobic Sludge Granulation in UASB Reactors

1993 ◽  
Vol 28 (7) ◽  
pp. 171-178 ◽  
Author(s):  
Chen Jian ◽  
Lun Shi-yi
Keyword(s):  
Kinetic Data ◽  
Fermentation Broth ◽  
Wide Spectrum ◽  
Decisive Role ◽  
Uasb Reactor ◽  
Second Step ◽  
Anaerobic Sludge ◽  
Nucleus Formation ◽  
Uasb Reactors ◽  
Sludge Granulation

Sludge granulation in a 15 m3 UASB reactor, with alcoholic stillage from ethanol fermentation broth as influent, has been studied. Based on kinetic data as well as both scanning and transmitting scope observation and identification, a hypothesis for the mechanism of anaerobic sludge granulation is suggested. The first step of granulation is the formation of nuclei. The bacteria involved in the nucleus formation are mainly M. sarcina and M. thrix. The acetic acid concentration and the “selection pressure” play a decisive role for determining the nucleus formation. A wide spectrum of other bacteria, which the methanogens must syntrophically grow with, also play a very important role during the second step, that is the process of a nucleus growing into a granule.

Sludge Characteristics in Uasb-Reactor Treating Thermomechanical Pulping Effluents

1985 ◽  
Vol 17 (1) ◽  
pp. 313-316 ◽  
Author(s):  
P J Vuoriranta ◽  
J A Rintala ◽  
H Kirjavainen
Keyword(s):  
Biogas Production ◽  
Operating Conditions ◽  
Uasb Reactor ◽  
Sludge Characteristics ◽  
Microbiological Methods ◽  
Thermomechanical Pulping ◽  
The Relationship ◽  
Uasb Reactors ◽  
Sludge Granulation ◽  
Sludge Activity

Sludge from laboratory scale UASB-reactors under various operating conditions and sulfur concentrations was characterized by using electron microscopy and microbiological methods. The objective of this research was to evaluate factors effecting sludge granulation and the relationship between sludge morphology and sludge activity, measured as a function of biogas production.

APLIKASI PROSES DIGESTASI ANAEROBIK LUMPUR BIOLOGI INSTALASI PENGOLAHAN AIR LIMBAH INDUSTRI KERTAS

2014 ◽  
Vol 4 (02) ◽  
Author(s):  
Rina S. Soetopo ◽  
Sri Purwati ◽  
Henggar Hardiani ◽  
Mukharomah Nur Aini ◽  
Krisna Adhitya Wardhana
Keyword(s):  
Oxygen Demand ◽  
Total Solid ◽  
Pilot Scale ◽  
Organic Content ◽  
Solid Content ◽  
Uasb Reactor ◽  
Anaerobic Sludge ◽  
Organic Loading ◽  
Total Solid Content ◽  
Average Value

A continuous pilot scale study has been conducted to investigate the effectiveness of anaerobic digestion of biological sludge. The sludge has a total solid content of 0.53% - 1.1%, pH of 7.20 to 7.32. Its organic content is about 97 %, The research were conducted in two stages, which are acidification (performed in 3 m3 the Continously Stirred Tank Reactor/CSTR at pH of 5.5 to 6.0) and methanation (performed in 5 m3 the Up Flow Anaerobic Sludge Blanket/UASB reactor at pH 6.5 to 7.0). The retention time (RT) was gradually shortened from 6 days to 1 day for acidification and from 8 days to 2 days for methanation. The results showed that operating the CSTR at the RT of 1 day and the organic loading of 8.23 g Volatile Solid (VS)/m3.day could produce Volatile Fatty Acid (VFA) at an average value of 17.3 g/kg VS.day. Operating the UASB reactor at the RT of 2 days and the organic loading (Chemical Oxygen Demand/COD) of 2.4 kg COD/m3.day could produce biogas at an average value of 66.3 L/day, with an average methane content of 69.9%, methane rate of 0.17 L CH4/g COD reduction or 19.06 L CH4/kg VS. Furthermore, methanation could reduce COD at an average value of 51.2 %, resulting in the effluent average value of COD filtrate and COD total of 210.1 mg/L and 375.2 mg /L, respectively.Keywords: acidification, methanation, CSTR, UASB, biogas ABSTRAKPercobaan digestasi anaerobik lumpur IPAL biologi industri kertas secara kontinyu skala pilot telah dilakukan di industri kertas dengan tujuan mengkaji efektivitas proses digestasi anaerobik dalam mengolah lumpur tersebut. Lumpur yang digunakan memiliki total solids sekitar 0,53% – 1,1%, pH netral (7,20 – 7,32) dengan komponen utama senyawa organik sekitar 97%. Percobaan dilakukan dalam dua tahap yaitu asidifikasi dalam reaktor CSTR berkapasitas 3 m3 pada pH 5,5 – 6,0 dan metanasi dalam reaktor UASB berkapasitas 5 m3 pada pH 6,5 – 7,0. Percobaan dilakukan dengan waktu retensi yang dipersingkat secara bertahap dari 6 hari ke 1 hari untuk proses asidifikasi dan dari 8 hari ke 2 hari untuk proses metanasi. Hasil percobaan menunjukkan bahwa pengoperasian reaktor CSTR dengan waktu retensi 1 hari dan beban organik 8,3 g VS/m3.hari dapat menghasilkan VFA rata-rata 17,3 g/kg VS.hari dengan kisaran 8,36 – 30,59 g/kg VS.hari, sedangkan pengoperasian reaktor UASB pada waktu retensi 2 hari dan beban organik 2,4 kg COD/m3.hari dapat menghasilkan biogas rata-rata 66,3 L/hari dengan kadar metana rata-rata 69,9% atau 0,17 L CH4/g COD reduksi atau 19,06 L CH4/kg VS. Selain itu proses metanasi dapat menurunkan COD terlarut rata-rata 51,2%, dengan konsentrasi efluen COD terlarut  rata-rata 210,1 mg/L dan COD total rata-rata 375,2 mg/L.Kata kunci: asidifikasi, metanasi, CSTR, UASB, biogas

KINETIC CONSTANTS DETERMINATION OF PETROLEUM REFINERY EFFLUENT TREATMENT IN A UASB REACTOR USING RSM

2017 ◽  
Vol 16 (1) ◽  
pp. 121-130 ◽  
Author(s):  
Seyyed Mohammad Mousavi ◽  
Seyed Omid Rastegar ◽  
Seyed Abbas Shojaosadati ◽  
Soheila Sheibani
Keyword(s):  
Petroleum Refinery ◽  
Kinetic Constants ◽  
Effluent Treatment ◽  
Uasb Reactor ◽  
Refinery Effluent ◽  
Petroleum Refinery Effluent
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