scholarly journals PENGARUH SUBSTITUSI BY-PRODUCT INDUSTRI TAPIOKA PADA FESES SAPI PERAH SEBAGAI SUBSTRAT BIOGAS TERHADAP NILAI pH, PRODUKSI METAN DAN KECERNAAN BAHAN ORGANIK

2020 ◽  
Vol 8 (2) ◽  
pp. 53
Author(s):  
M. Istiadi ◽  
Sutaryo Sutaryo ◽  
Agung Purnomoadi
Keyword(s):  
Volatile Solid

Tujuan dari penelitian ini adalah untuk mengevaluasi co-digesti onggok dengan feses sapi perah sebagai substrat pada digeter biogas terhadap nilai pH, produksi metan dan kecernaan bahan organik. Hasil penelitian menunjukan bahwa tidak adanya perbedaan yang nyata (p>0,05) antara perlakuan penggunaan onggok dan feses sapi perah sebagai substrat biogas (T1) dengan feses sapi perah tanpa substitusi dengan onggok (T0) terhadap nilai pH, produksi methan dan kecernaan bahan organik. Nilai pH pada perlakuan T1 sebesar 6,68 dan T0 sebesar 6,86. Produksi metan pada T1 sebesar 204,84 ml/g volatile solid (VS) dan pada T0 sebesar 184,88 ml/g VS. Kecernaan bahan organik pada T1 (29,44%) dan T0 (23,06%). Kesimpulan dari penelitian ini adalah substitusi onggok sebesar 5% pada feses sapi perah sebagai substrat biogas dengan bahan baku feses sapi perah tidak memberikan perbedaan terhadap nilai pH, hasil produksi metan dan kecernaan bahan organik. Kata kunci : Biogas, Kecernaan bahan organik, Nilai pH, Onggok, Produksi metan

scholarly journals Effect of Mixing Regimes on Cow Manure Digestion in Impeller Mixed, Unmixed and Chinese Dome Digesters

Energies ◽  
2019 ◽  
Vol 12 (13) ◽  
pp. 2540
Author(s):  
Abiodun O. Jegede ◽  
Grietje Zeeman ◽  
Harry Bruning
Keyword(s):  
Urban Areas ◽  
Hydraulic Retention Time ◽  
Biogas Production ◽  
Gas Production ◽  
Cow Manure ◽  
Volatile Solid ◽  
Treatment Efficiency ◽  
Ambient Temperatures ◽  
Ch4 Production ◽  
Mixing Regime

This study examines the effect of mixing on the performance of anaerobic digestion of cow manure in Chinese dome digesters (CDDs) at ambient temperatures (27–32 °C) in comparison with impeller mixed digesters (STRs) and unmixed digesters (UMDs) at the laboratory scale. The CDD is a type of household digester used in rural and pre-urban areas of developing countries for cooking. They are mixed by hydraulic variation during gas production and gas use. Six digesters (two of each type) were operated at two different influent total solids (TS) concentration, at a hydraulic retention time (HRT) of 30 days for 319 days. The STRs were mixed at 55 rpm, 10 min/hour; the unmixed digesters were not mixed, and the Chinese dome digesters were mixed once a day releasing the stored biogas under pressure. The reactors exhibited different specific biogas production and treatment efficiencies at steady state conditions. The STR 1 exhibited the highest methane (CH4) production and treatment efficiency (volatile solid (VS) reduction), followed by STR 2. The CDDs performed better (10% more methane) than the UMDs, but less (approx. 8%) compared to STRs. The mixing regime via hydraulic variation in the CDD was limited despite a higher volumetric biogas rate and therefore requires optimization.

Zwitterionic materials with disorder and plasticity and their application as non-volatile solid or liquid electrolytes

2021 ◽  
Author(s):  
Faezeh Makhlooghiazad ◽  
Luke A. O’Dell ◽  
Luca Porcarelli ◽  
Craig Forsyth ◽  
Nurul Quazi ◽  
...  
Keyword(s):  
Volatile Solid ◽  
Liquid Electrolytes

scholarly journals The Effect of Magnesium Sulfate Addition on Volatile Solid Destruction and Chemical Oxygen Demand Reduction of Food Waste Anaerobic Digestion

2019 ◽  
Vol 10 (8) ◽  
pp. 1602
Author(s):  
Khansa Luqyana Hapsari ◽  
Firyal Tharifa ◽  
Setyo Sarwanto Moersidik ◽  
Sandyanto Adityosulindro ◽  
Cindy Rianti Priadi
Keyword(s):  
Anaerobic Digestion ◽  
Chemical Oxygen Demand ◽  
Magnesium Sulfate ◽  
Food Waste ◽  
Oxygen Demand ◽  
Volatile Solid ◽  
Demand Reduction ◽  
Chemical Oxygen Demand Reduction

scholarly journals Cow Urine for Enhancement of Biogas Production and Fertilizer Quality of Biogas Slurry

2020 ◽  
Vol 12 (1) ◽  
pp. 135-144
Author(s):  
M. R. Fardous ◽  
M. S. Nasrin ◽  
M. E. Shakil ◽  
M. S. Islam ◽  
M. A. Hoque ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Biogas Production ◽  
Cow Dung ◽  
Biogas Slurry ◽  
Volatile Solid ◽  
Maximum Conversion ◽  
Cow Urine ◽  
Experimental Trials ◽  
Gas Volume

To explore the potency of cow urine on biogas production and fertilizer quality of the biogas slurries, six experimental trials,  T0 (50% CD:50% Water) as control, T1 (10% CD:90% CU), T2 (20% CD:80% CU), T3 (30% CD:70% CU), T4 (40% CD:60% CU) and T5 (50% CD:50% CU) were constructed  by mixing cow dung (CD) and cow urine (CU). Cumulative gas volume was estimated for 30 days and the physicochemical properties of the slurries were evaluated. The cumulative gas volume of three trials (T3, T4 and T5) was higher than control (T0) and T5 showed maximum (28% over the control). Moreover, all of the trials except one (T1) showed higher gas yield than control (T0) of which maximum conversion of volatile solid (VS) to gas was obtained in T3. pH of the amended samples were above 7.0 (pH 7.00-7.42). Conductivity of the samples also increases (1.94-13.40 mS cm-1) with the increase in cow urine percentage. With respect to macronutrient (N, P, K) cow urine amended samples can be considered superior to the control one. Moreover, C/N ratio of all the amended samples were below 15 (4.7-14.0) and thus these are suitable for agronomic uses.

Molecular Ordering and Phase Segregation Induced by a Volatile Solid Additive for Highly Efficient All-Small-Molecular Organic Solar Cells

2020 ◽  
Author(s):  
Shanshan Chen ◽  
Junfeng Ye ◽  
Qianguang Yang ◽  
Jiyeon Oh ◽  
Dingqin Hu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Phase Separation ◽  
Active Layer ◽  
Organic Solar Cells ◽  
Phase Segregation ◽  
Morphology Control ◽  
Volatile Solid ◽  
Trade Off ◽  
Molecular Ordering ◽  
Solid Additive

Morphology control remains a major challenge for all-small-molecular organic solar cells (ASM OSCs), mainly reflecting in the elusive trade-off between the molecular ordering and phase separation of the active layer....

Use of Low-Volatile Solid Fuels in a 100 kW Chemical-Looping Combustor

2014 ◽  
Vol 28 (9) ◽  
pp. 5942-5952 ◽  
Author(s):  
Carl Linderholm ◽  
Matthias Schmitz ◽  
Pavleta Knutsson ◽  
Malin Källén ◽  
Anders Lyngfelt
Keyword(s):  
Solid Fuels ◽  
Chemical Looping ◽  
Volatile Solid

Study of Anaerobic Digestion of Model Kitchen Waste

2014 ◽  
Vol 955-959 ◽  
pp. 2692-2696 ◽  
Author(s):  
Li Fan Liu ◽  
Yong Wei Liao ◽  
Jie Liang ◽  
Shu Ting Lai
Keyword(s):  
Anaerobic Digestion ◽  
Carbon Concentration ◽  
Dry Matter ◽  
Biogas Production ◽  
Total Solid ◽  
Volatile Solid ◽  
Kitchen Waste ◽  
Operational Conditions ◽  
Digestion Process ◽  
Seed Sludge

The characteristics such as pH, dry matter, carbon concentration, the total solid and volatile solid of kitchen wastes produced by a canteen in Guangzhou were measured. The anaerobic digestion process performances were evaluated through the examination of operational conditions like activated sludge inoculation, temperature on SS, biogas production, COD concentration and pH in the reactor. When the proportion between kitchen wastes to seed sludge inoculation was 1:1, the biogas production reached the peak at 45 °C. The kitchen waste pH decreased at the first four days then increased adversely after 4 days digestion, but COD concentration showed the opposite variation.

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