Effect of hydraulic retention time on the hydrogen production in a horizontal and vertical continuous stirred-tank reactor

2019 ◽  
Vol 44 (33) ◽  
pp. 17742-17749 ◽  
Author(s):  
Pong-Chol Ri ◽  
Jong-Su Kim ◽  
Tong-Ryul Kim ◽  
Chol-Ho Pang ◽  
Hye-Gyong Mun ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Retention Time ◽  
Hydraulic Retention Time ◽  
Stirred Tank ◽  
Continuous Stirred Tank Reactor ◽  
Stirred Tank Reactor ◽  
Tank Reactor ◽  
Continuous Stirred Tank

scholarly journals MINI DIGESTER UNTUK PENGOLAHAN LIMBAH ORGANIK MENJADI BIOGAS DAN DAMPAK TERHADAP PENGURANGAN EMISI (MINI DIGESTION TO PRODUCE BIOGAS FROM ORGANIC WASTE AND IMPACT ON REDUCING EMISSIONS)

2020 ◽  
Vol 8 (1) ◽  
pp. 022
Author(s):  
Rinjani Rakasiwi ◽  
Wivina Ivontianti ◽  
Eva Sitanggang
Keyword(s):  
Anaerobic Digestion ◽  
Retention Time ◽  
Organic Waste ◽  
Hydraulic Retention Time ◽  
Biogas Production ◽  
Stirred Tank ◽  
Continuous Stirred Tank Reactor ◽  
Stirred Tank Reactor ◽  
Tank Reactor ◽  
Continuous Stirred Tank

Abstract Organic waste is material that has no value but can be used as raw material to produce biogas. It is easier to handle by anaerobic processing. The advantages of biogas by using anaerobic digestion process are minimizes the effects of environmental pollutions, reduce emissions and increase the value of the benefits of waste. The purposes of this research are to design a digester for processing organic waste into biogas and find out the impact of biogas production on emissions reduction. Biogas production was analyzed using gas Chromatography (GC) and emission reductions were calculated using the AP-42 (Compilation of Air Pollutant Emissions Factors) equation. The digester used is a CSTR which is suitable for liquid phase and for organic chemical reactions with large conversions. Parameters that affect the performance of the reactor are the residence time on the flow of substances in the reactor, Hydraulic Retention Time (HRT). HRT can affect the growth of fermentative bacteria corelation with the production of biogas. The optimum volume of biogas of 16.52 Liters / Day with the acquisition of CH4 of 75,893.36 ppm was on the 13th day in a variation of HRT 20. Every 20 kg of organic waste that has been processed in the digester, it will be reducing 76.5 g / day of CO emissions. Keywords: anaerobic digestion, CSTR (Continuous Stirred Tank Reactor), HRT (Hydraulic Retention Time), trashAbstrakSampah organik merupakan bahan yang tidak mempunyai nilai atau tidak berharga tetapi dapat dijadikan sebagai bahan baku pembuatan biogas, karena lebih mudah untuk ditangani dan dapat dilakukan dengan proses anaerobik. Kelebihan dari biogas dengan menggunakan proses anaerobic digestion akan meminimalkan efek dari pencemaran lingkungan, mengurangi emisi dan meningkatkan nilai manfaat dari limbah. Tujuan penelitian ini adalah merancang digester untuk pengolahan sampah organik menjadi biogas dan mengetahui dampak produksi biogas yang dihasilkan terhadap pengurangan emisi. Produksi biogas dianalisa menggunakan Chromatografi gas (GC) dan pengurangan emisi dihitung menggunakna persamaan AP-42 (Compilation of Air Polutant Emissions Factors). Digester yang digunakan merupakan reaktor tipe alir tangki berpengaduk/CSTR untuk reaksi fase cair dan juga digunakan untuk reaksi kimia organik dengan konversi yang besar. Parameter yang mempengaruhi kinerja reaktor yaitu waktu tinggal pada zat alir di dalam reaktor atau disebut dengan Hydraulic Retention Time (HRT). HRT dapat mempengaruhi pertumbuhan bakteri fermentatif yang terkait dengan hasil produksi biogas. Hasil volume biogas optimum sebesar 16,52 Liter/Hari dengan perolehan CH4 sebesar 75.893,36 ppm berada di hari ke- 13 pada variasi HRT 20. Sampah organik sebanyak 20 kg diolah di digester mengurangi 76,5 g/hari emisi CO. Kata kunci: anaerobic digestion, CSTR (Continuous Stirred Tank Reactor), HRT (Hydraulic Retetion Time), sampah.

Bio-Hydrogen Production through Anaerobic Microorganism Fermentation from Molasses Wastewater in a Continuous Stirred Tank Reactor

2015 ◽  
Vol 737 ◽  
pp. 336-339
Author(s):  
Zhi Qin ◽  
Yong Yan Cui ◽  
Chao Yu Zhang ◽  
Bing Xie
Keyword(s):  
Hydrogen Production ◽  
Ph Value ◽  
Stirred Tank ◽  
Organic Loading Rate ◽  
Stable Operation ◽  
Continuous Stirred Tank Reactor ◽  
Anaerobic Microorganism ◽  
Stirred Tank Reactor ◽  
Tank Reactor ◽  
Continuous Stirred Tank

In order to treat the beet sugar factory wastewater and produce hydrogen, a low pH, ethanol-type fermentation process had happened in a continuous stirred tank reactor (CSTR) with an effective volume of 9.6 L in this experiment. The results showed that after inoculation with activated sludge and operation at organic loading rate (OLR) of 9 kgCOD/m3·d, hydraulic retention time (HRT) of 8h, influent pH value of 6.5 and temperature of 35°C for 30 days, the CSTR achieved stable ethanol-type fermentation. During this period of stable operation, the reactor showed a stable COD removal efficiency of 19.2% and hydrogen production rate of 0.1L/gMLSS·d. Effluent pH ranged from 4.0 to 4.5. The total amount of ethanol and acetic acid was 1384 mg/L, accounted for 81% of the total liquid products, which can be attributed to ethanol-type fermentation. The experimental results showed that the CSTR system had good operation stability and microbial activity, which led to high substrate conversion rate and hydrogen production ability.

Characteristics of Biohydrogen Production by Ethanoligenens Sp. R3 Isolated from Continuous Stirred Tank Reactor

2010 ◽  
Vol 152-153 ◽  
pp. 702-707
Author(s):  
An Ying Jiao ◽  
Yong Feng Li ◽  
Bing Liu ◽  
Kun Liu ◽  
Jing Li Xu
Keyword(s):  
Carbon Source ◽  
Hydrogen Production ◽  
Nitrogen Source ◽  
Ph Value ◽  
Stirred Tank ◽  
Continuous Stirred Tank Reactor ◽  
Stirred Tank Reactor ◽  
Tank Reactor ◽  
Initial Ph ◽  
Continuous Stirred Tank

Ethanoligenens sp. R3 isolated from anaerobic sludge in a continuous stirred tank reactor was investigated for its characteristics of fermentative hydrogen production in this study. Effects of initial pH value, fermentation temperature and proportion of carbon/nitrogen source on hydrogen production were investigated in batch experiments. The typical substrate for hydrogen production of glucose and peptone were used as the carbon source and nitrogen source, respectively. The results show that the maximum hydrogen production yield of 834 mlH2/L culture was obtained with initial pH value of 5.5 and fermentation temperature at 35°C. In addition, the maximum average hydrogen production rate of 10.87mmolH2/g cell dry weighth was achieved at the carbon/nitrogen source ratio of 3.3. The degradation efficiency of the glucose used as the carbon source ranged from 91.5% to 95.43% during the conversion of glucose to hydrogen by bacteria Ethanoligenens sp. R3.

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