scholarly journals Pemanfaatan Sludge Limbah Biodigester untuk Meningkatkan Kecepatan Produksi Biogas dan Konsentrasi Gas Metan dalam Biogas

2018 ◽  
Vol 2 (2) ◽  
pp. 43
Author(s):  
Heni Dwi Kurniasari
Keyword(s):  
Air Pollution ◽  
Incubation Time ◽  
Biogas Production ◽  
Ash Content ◽  
Cow Dung ◽  
Cow Manure ◽  
Gas Composition ◽  
Volatile Solid ◽  
E Coli ◽  
C 30

<p><em>Sludge</em> hasil samping pengolahan kotoran sapi menjadi biogas masih mengandung bahan pencemar seperti E. coli, oleh karena itu apabila sludge dibuang langsung ke lingkungan akan menyebabkan pencemaran air, tanah, dan udara. Selama ini sludge hanya dimanfaatkan sebagai pupuk, padahal dalam sludge dimungkinkan masih mengandung mikroorganisme yang dapat mempercepat proses pembentukan biogas. Penelitian ini bertujuan untuk mengetahui pengaruh penambahan <em>sludge</em> biodigester dalam pembentukan biogas dan mengetahui perbandingan optimal komposisi limbah kotoran sapi dengan <em>sludge</em> biodigester sebagai rekomendasi dalam percepatan proses pembentukan biogas. <em>Sludge </em>biodigester merupakan limbah biogas setelah mengalami pengeraman selama 14 hari. Dalam penelitian ini digunakan 3 macam digester dengan variasi komposisi yaitu digester-1 tanpa penambahan sludge biodigester, digester-2 dengan penambahan sludge biodigester sebesar 25%, digester-3 dengan penambahan<em> sludge</em> biodigester sebesar 50%. Volume digester sebesar 30 liter dan waktu pengeraman 14 hari. Parameter pendukung yang diuji meliputi: Volatile Solid (VS), dry content, kadar abu, temperatur, pH isian, komposisi gas. Hasil penelitian menunjukkan bahwa jumlah biogas yang cenderung lebih baik dihasilkan oleh digester-2 dengan bahan campuran 75 % kotoran sapi dan 25 % sludge biodigester. Digester-2 memiliki kadar VS rata-rata 4,62 %, kadar abu 1,82 %, dry content 93,56 %, dengan volume total biogas sebesar 33,4 liter dan kandungan metana rata-rata sebesar 12,19 %. Secara keseluruhan biogas terbentuk pada umur isian 3 hari, dengan rentang suhu 26 °C–30 °C dan pH 6,82–7,44. Penelitian ini memperlihatkan bahwa dengan adanya penambahan sludge biodigester (return sludge) mampu memberikan pengaruh yang lebih baik terhadap produksi biogas jika dibandingkan tanpa adanya penambahan sludge biodigester.</p><p><em>Sludge byproduct of processing cow dung into biogas still contains pollutants such as E. coli, therefore if sludge is discharged directly into the environment it will cause water, soil and air pollution. So far, sludge is only used as fertilizer, whereas in sludge it is possible to still contain microorganisms that can accelerate the process of biogas formation. This study aims to determine the effect of the addition of biodigester sludge in the formation of biogas and determine the optimal comparison of the composition of cow manure with biodigester sludge as a recommendation in accelerating the process of biogas formation. </em><em>Sludge biodigester is a biogas waste after experiencing incubation for 14 days. In this study used 3 kinds of digesters with variations in composition, namely digester-1 without the addition of biodigester sludge, digester-2 with the addition of biodigester sludge by 25 %, digester-3 with the addition of biodigester sludge by 50 %. The digester volume is 30 liters and the incubation time is 14 days. Supporting parameters tested include: Volatile Solid (VS), dry content, ash content, temperature, pH filled, gas composition. </em><em>The results showed that the amount of biogas that tends to be better produced by digester-2 with a mixture of 75 % cow dung and 25 % sludge biodigester. Digester-2 has an average VS content of 4.62 %, ash content of 1.82 %, dry content of 93.56 %, with a total biogas volume of 33.4 liters and an average methane content of 12.19 %. Overall biogas is formed at the age of 3 days, with a temperature range of 26 °C-30 °C and a pH of 6.82-7.44. This research shows that the addition of biodigester sludge (return sludge) can provide a better effect on biogas production when compared without the addition of biodigester sludge.</em></p>

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.

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.

Solid-State Anaerobic Digestion for Methane Production from Corn Stalks with Stack-Pretreated

2011 ◽  
Vol 697-698 ◽  
pp. 326-330 ◽  
Author(s):  
S.X. Zhou ◽  
Y.P. Dong ◽  
Y.L. Zhang
Keyword(s):  
Anaerobic Digestion ◽  
Solid State ◽  
Methane Production ◽  
Biogas Production ◽  
Cow Dung ◽  
Cow Manure ◽  
Pretreatment Method ◽  
Biogas Yield ◽  
Microbial Pretreatment ◽  
Microbial Strains

Microbial pretreatment was applied to enhance biogas production from corn stover through solid-state anaerobic digestion, but the price of microbial strains is high. The objective of this study was to find the effects on biogas production by the naturally microbial pretreatment method. The highest cumulative biogas yield for 60-day solid-state anaerobic digestion was obtained in B group (the pretreated corn straws with cow dung), which was 19.6% higher than that of the untreated samples. The D group（the pretreated corn straws with the sludge）cumulative biogas yield for 60-day solid-state anaerobic digestion was obtained, which was 18.87% higher than that of the untreted samples. The biogas of D group increased to the range of 55%～60% methane content, while B group with the range of 75%～80%.The results indicated that the pretreated corn straws mixing cow manure can improve both the biogas production yield and the content of methane in CH4。

scholarly journals Quantitative and qualitative variations of effective parameters on biogas produced from mixed wastes in anaerobic digester: Bench scale

2021 ◽  
Author(s):  
Abdoliman Amouei ◽  
Ali Darvish Sasi ◽  
Aliakbar Amooey
Keyword(s):  
Biogas Production ◽  
Maximum Yield ◽  
Total Solid ◽  
Cow Dung ◽  
Cow Manure ◽  
Mixing Ratio ◽  
Effective Parameters ◽  
Operational Parameters ◽  
Weight Percentage ◽  
Bench Scale

Abstract Today, biogas production from municipal solid waste as one of the most important sources of energy supply in the world is increasing. In this study, the potential of biogas production from a mixture of cow dung and catering waste was investigated using a continuous flow anaerobic bioreactor with 60 litres at the Bench scale. Operational parameters such as pH, Carbon to Nitrogen ratio (C/N), mixing ratio of restaurant and cow waste in weight percentage (0:100, 50:50, 70:30, and 100:0), total solids (TS) (%5, %10 and %20), temperatures (35, 45 and 55°C) and oxidation-reduction potential (ORP) were evaluated. The results showed that the maximum yield and percent of the biogas produced from cow manure digestion separately was 1003 ml/day and %52.82. Digestion of the catering waste and cow manure as a mixture showed the best mixing ratio, total solid and temperature is 70:30 (w/w), %20 and 55°C respectively and biogas production yield and percent in this conditions was obtained 5430 ml/day and %74.4 respectively. The ORP obtained in this study is -327 millivolt (mv), which indicates the appropriate conditions of the anaerobic process in biogas production and confirmation of methanogenesis.

scholarly journals ABUNDANCE OF CORAL FISH SPECIES AND THE CONDITION OF CORAL REEFS IN THE WATERS OF THE TIKUS ISLAND, BENGKULU CITY

2020 ◽  
Vol 3 (1) ◽  
pp. 38-48
Author(s):  
Rugun ◽  
Irwan Effendi ◽  
Mubarak Mubarak ◽  
Hanies Ambarsari
Keyword(s):  
Fossil Fuels ◽  
Biogas Production ◽  
Physical Parameters ◽  
Cow Dung ◽  
Cow Manure ◽  
Environmental Technology ◽  
Randomized Design ◽  
Volume Measurements ◽  
Coral Fish ◽  
And Control

This research was conducted in April - June 2019, located at the Center for Environmental Technology Laboratory (PTL) - Agency for the Assessment and Application of Technology (BPPT), Building 820 Geostech, Puspitek Serpong, South Tangerang. The purpose of this study was to determine the biogas production from S. platensis microalgae grown in polluted domestic waste media from Muara Angke waters with different concentrations. The method used in this study is an experimental method with a Completely Randomized Design (CRD) with 3 different treatments of S. platensis concentrations consisting of 5% v/v, 15% v/v and 25% v/v performed three repetitions with the addition cow manure substrate and control without the addition of cow manure substrate. The parameters observed were physical parameters, chemical parameters, biomass calculations and biogas volume measurements. Data were analyzed and tested statistically using Analysis Of Variance (ANOVA) and further tested using the LSD test to compare between treatments with a 95% confidence level. Biogas is energy that can be used as an alternative fuel to replace fossil fuels such as petroleum and natural gas. The results showed that S. platensis with the addition of cow dung could produce more biogas volume (4453.6 cm) than S. platensis without the addition of cow dung (697.19 cm). Biogas volume is measured using the gas holder method.

scholarly journals Co-digestion of Shumblan with Different Wastes as a Source for the Biogas Production

2018 ◽  
Vol 14 (4) ◽  
pp. 83-91
Author(s):  
Duaa A. Farhan ◽  
Farkad A. Lattieff ◽  
Mohammed A. Atiya
Keyword(s):  
Volatile Fatty Acid ◽  
Biogas Production ◽  
Food Wastes ◽  
Cow Manure ◽  
Volatile Solid ◽  
Biogas Yield ◽  
Economic Operation ◽  
Irrigation Channels ◽  
Promising Source ◽  
Ph Variations

Shumblan (SH) is one of the most undesirable aquatic plants widespread in the irrigation channels and water bodies. This work focuses on boosting the biogas potential of shumblan by co-digesting it with other types of wastes without employing any chemical or thermal pretreatments as done in previous studies. A maximum biogas recovery of 378 ml/g VS was reached using shumblan with cow manure as inoculum in a ratio of 1:1. The methane content of the biogas was 55%. Based on volatile solid (VS) and C/N ratios, biogas productions of 518, 434, and 580 ml/g VS were obtained when the shumblan was co-digested with food wastes (SH:F), paper wastes (SH:P), and green wastes (SH:G) respectively. No significant changes of methane contents were observed during the anaerobic co-digestion of shumblan with the selected wastes. This noticeable increments of biogas yields proved that this sort of biomass can be utilized as a promising source for bioenergy production of industrial scale because of its economic operation. Slight pH variations indicated that the co-digestion performance has a good stability operation and no excessive amounts of volatile fatty acid were accumulated. The results also proved that by using co-digestion technology, the biodegradation of shumblan plants could be significantly accelerated supplying greater amounts of biogas yields. Moreover, the appropriate co-digestion with other wastes gave the shumblan high digestibility and, hence, there will be no need to prior pretreatment in order to boost the biogas yield.

scholarly journals Anaerobic co-digestion cow dung and corn stalk - effect of corn stalk pre-treated timing

2018 ◽  
Vol 10 (1) ◽  
pp. 41-48
Author(s):  
Le Phuong Nguyen ◽  
Thanh Ai Lam ◽  
Thi Diem Trang Nguyen ◽  
Huu Chiem Nguyen ◽  
Vo Chau Ngan Nguyen
Keyword(s):  
Energy Use ◽  
Biogas Production ◽  
Cow Dung ◽  
Corn Stalk ◽  
Mixing Ratio ◽  
Volatile Solid ◽  
Biogas Yield ◽  
Pre Treatment ◽  
Set Up ◽  
In The Beginning

The study was aimed to investigate the effect of corn stalk pre-treatment duration on biogas production when cow dung and corn stalk was co-digested in an anaerobic digestion. Corn stalks were pre-treated in different durations: 2-days, 5-days, and 8-days before being added to cow dung into anaerobic co-digesters. The experiments were set up randomly by using triplicate batch anaerobic apparatus in 21 L containers that run in 60-days. The mixing ratio between a corn stalk and cow dung was 50%: 50% (based on the volatile solid value of each material), but corn stalk was cut into small pieces with around 10 cm length, while the cow dung was air dried. The results of the study indicated that all operation parameters such as temperature, pH, and alkalinity in the anaerobic batch were suitable for biogas production. The results showed that there was a significant improvement in total gas produced in the pre-treated 5-days treatment (206.4±8.4 L) compared to 2-days (153.4±9.6 L), and 8-days ones (174±11.1 L). The biogas yield of the pre-treated 2-days, 5-days, and 8-days treatments were 392.7±9.8 L/kg VSfermented, 469.8±10.1 L/kg VSfermented and 497.1±13.3 L/kg VSfermented, respectively, that was not significantly different (5%). In all treatments, low concentration of methane in the beginning phase had been observed but increased and reached the optimum value for energy use after 10 days. The result of the study showed that it is preferable to have 5-days pre-treatment of corn stalk before the corn stalk is loaded to an anaerobic digester in combination with cow dung. Nghiên cứu này nhằm đánh giá ảnh hưởng của thời gian xử lý thân cây bắp lên năng suất sinh khí khi ủ phối trộn phân bò và thân cây bắp trong điều kiện yếm khí. Ba mức thời gian xử lý thân cây bắp được chọn là 2 ngày, 5 ngày, và 8 ngày. Các thí nghiệm được bố trí ngẫu nhiên trong các bình ủ yếm khí theo mẻ 21 L, vận hành trong 60 ngày liên tiếp và có 3 lần lặp lại. Nguyên liệu ủ được phối trộn theo tỷ lệ 50% phân bò và 50% thân bắp, trong đó thân bắp được cắt nhỏ cỡ 10 cm. Kết quả thí nghiệm cho thấy tất cả các thông số pH, nhiệt độ, độ kiềm của mẻ ủ đều phù hợp để vận hành. Lượng khí sinh ra của các nghiệm thức xử lý ở 2 ngày, 5 ngày, 8 ngày được ghi nhận là 153,4±9,6 L, 206,4±8,4 L và 174±11,1 L; năng suất sinh khí của các nghiệm thức không khác biệt và đạt giá trị 392,7±9,8 L/kg VSphânhủy, 469,8±10,1 L/kg VSphânhủy và 497,1±13,3 L/kg VSphânhủy. Tất cả các nghiệm thức đều sản sinh lượng CH4 thấp ở giai đoạn đầu nhưng tăng dần theo thời gian ủ và đạt hiệu quả sử dụng sau 10 ngày ủ. Kết quả cho thấy có thể chọn mốc thời gian 5 ngày để xử lý thân cây bắp trước khi đưa vào hầm ủ biogas.

Enhancing biogas production of cow dung during anaerobic digestion using nanoferrites

2021 ◽  
Author(s):  
Mahmoud A. Sliem ◽  
Sara El-Ansary ◽  
Wafaaa Soliman ◽  
Yehia Badr
Keyword(s):  
Anaerobic Digestion ◽  
Biogas Production ◽  
Cow Dung

Electroporation of harvest residues for enhanced biogas production in anaerobic co-digestion with dairy cow manure

2019 ◽  
Vol 274 ◽  
pp. 215-224 ◽  
Author(s):  
Đurđica Kovačić ◽  
Davor Kralik ◽  
Slavko Rupčić ◽  
Daria Jovičić ◽  
Robert Spajić ◽  
...  
Keyword(s):  
Dairy Cow ◽  
Biogas Production ◽  
Cow Manure ◽  
Harvest Residues ◽  
Dairy Cow Manure
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