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.

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 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 How return sludge increase biogas production from cow manure?

2020 ◽  
Vol 181 ◽  
pp. 01006
Author(s):  
Ambar Pertiwiningrum ◽  
Ratih Kusuma Wardani ◽  
Joko Wintoko ◽  
Rachmawan Budiarto ◽  
Margaretha Arnita Wuri ◽  
...  
Keyword(s):  
Retention Time ◽  
Alternative Energy ◽  
Fossil Fuels ◽  
Biogas Production ◽  
Raw Material ◽  
Cow Manure ◽  
Fuel Price ◽  
Energy Needs ◽  
Methane Level ◽  
Alternative Energies

The energy needs in Indonesia are mainly fulfilled by fossil fuels based energy. Since there is the rise of fuel price, Indonesia government considers seeking alternative energies from renewable resources. Biogas becomes one of the alternative energy that supplies energy needs and manages cow manure waste in Indonesia. To increase adoption of biogas technology, biogas production through methane enrichment is required. The experiment was conducted with return sludge system. These instruments consist of a series portable bio-digester, gas holder and return sludge unit. There were three treatments on biogas production without and with sludge addition or re-use bio-digester sludge that produced after biogas production as raw material for next biogas production. Biogas that produced was observed every two days during 40 days. The results showed that the addition of bio-digester sludge increased biogas production and methane concentration. The optimum retention time of biogas production with sludge addition was 20 days with accumulation biogas volume of 156.38 liters or increased of 38.75 from biogas production without bio-digester sludge). The optimum retention time to increase methane level was 15 days with methane enrichment from 0.8% to 29.41%.

scholarly journals Comparative effect of various organic extracts coated urea fertilizer on the release pattern of Ammonium and Nitrate in the soil at different time intervals

2021 ◽  
Author(s):  
Adeel Ahmad ◽  
Muhammad Yaseen ◽  
Hafiz Naeem Asghar ◽  
Shahzad Maqsood Ahmed Basra
Keyword(s):  
Fertilizer Application ◽  
Cow Dung ◽  
Nitrification Inhibitors ◽  
Neem Oil ◽  
Coating Materials ◽  
N Losses ◽  
Randomized Design ◽  
Coated Urea ◽  
And Control ◽  
Urea Granules

Abstract Nitrogen (N) fertilizer application is a very important commodity in agricultural systems. However, due to the losses of applied N from the soil microenvironment its efficiency is too low. Different strategies like the use of polymer coating and use of chemical nitrification inhibitors had been employed to reduce N losses. But these chemical nitrification inhibitors are very expensive. Thus, a study was conducted to investigate the effects of different concentrations of parthenium extract, neem oil and acidulated cow dung compost extract on N dynamics in the soil. Three concentrations of parthenium extract (5, 10 and 15 %) and neem oil (1, 2 and 3 %) were coated on urea granules after mixing with the polymer material. Three pH (2, 4 & 6 pH) based acidulated cow dung compost extracts were also coated on urea granules in the same pattern. These coated fertilizers and uncoated urea were applied in jars filled with soil (100g per jar) at the rate of 1g of fertilizer per jar. One treatment was kept as control (without any fertilizer). Treatments along three replications were arranged according to the completely randomized design (CRD). Results depicted that all coating materials caused the release of N consistently from applied fertilizers compared to uncoated treatment. In addition, percent nitrified N was also reduced significantly in coated treatments in comparison to the uncoated urea and control treatments. However, the level of concentration effect was not obvious as lower concentrations of these extracts and oil also performed almost equal to that of higher concentrations.

scholarly journals Emission of Carbon Dioxide Influenced by Different Water Levels from Soil Incubated Organic Residues

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
M. B. Hossain ◽  
A. B. Puteh
Keyword(s):  
Organic Carbon ◽  
Rice Straw ◽  
Poultry Litter ◽  
Water Levels ◽  
Cow Dung ◽  
Organic Residues ◽  
Organic C ◽  
Time Control ◽  
Randomized Design ◽  
And Control

We studied the influence of different organic residues and water levels on decomposition rate and carbon sequestration in soil. Organic residues (rice straw, rice root, cow dung, and poultry litter) including control were tested under moistened and flooding systems. An experiment was laid out as a complete randomized design at 25°C for 120 days. Higher CO2-C (265.45 mg) emission was observed in moistened condition than in flooding condition from 7 to 120 days. Among the organic residues, poultry litter produced the highest CO2-C emission. Poultry litter with soil mixture increased 121% cumulative CO2-C compared to control. On average, about 38% of added poultry litter C was mineralized to CO2-C. Maximum CO2-C was found in 7 days after incubation and thereafter CO2-C emission was decreased with the increase of time. Control produced the lowest CO2-C (158.23 mg). Poultry litter produced maximum cumulative CO2-C (349.91 mg). Maximum organic carbon was obtained in cow dung which followed by other organic residues. Organic residues along with flooding condition decreased cumulative CO2-C,kvalue and increased organic C in soil. Maximumkvalue was found in poultry litter and control. Incorpored rice straw increased organic carbon and decreasedkvalue (0.003 g d−1) in soil. In conclusion, rice straw and poultry litter were suitable for improving soil carbon.

scholarly journals Water Quality as Affected by Quarry Activities in Ebonyi State, Nigeria

2021 ◽  
Author(s):  
Odera Chukwumaijem Okafor ◽  
Chima Njoku
Keyword(s):  
Chemical Properties ◽  
Physical Parameters ◽  
Chemical Parameters ◽  
Southeastern Nigeria ◽  
Heavy Metal Concentrations ◽  
Treatment Processes ◽  
Randomized Design ◽  
Domestic Use ◽  
Completely Randomized Design ◽  
And Control

Abstract The study was done in 2018, 2019 and 2020, during which quarry activities effects was determined on water qualities in Ebonyi State, Southeastern Nigeria. The following locations were selected: 0 – 50 m from quarry locations at Ishiagu, Umuoghara and Ngbo were selected with Non quarry location situated 3 km away from each location as control. Collected water samples were analysed for selected physical properties, chemical properties and heavy metal concentrations. The experimental design was carried out in a Completely Randomized Design (CRD) with F-LSD at (p < 0.05). The results obtained were compared with the established standards. Physical parameters studied in the sites within 0 – 50 m from quarry sites were higher than that of control and are within the recommended standards. Similarly, chemical parameters were higher the sites within 0 – 50 m from quarry sites than that of control and are within the standard, except pH in 2018 at Ishiagu and Umuoghara and pH of control in the three years of studied. Lead, cadmium and iron recorded values in sites within 0 – 50 m which were higher than that of control and the recommended standards whereas zinc observed in Ishiagu in 2018, 2019, 2019 were above standard and control. Zinc observed in Umuoghara and Ngbo were within standard but some values are either higher or lower than control. Based on the results water bodies in quarry sites should be subjected to treatment processes before domestic use to avoid ailments associated with water polluted with quarry activities.

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.

Investigation of Biogas Production Using Organic Kitchen Wastes through Anaerobic Digestion

2015 ◽  
Vol 787 ◽  
pp. 97-101
Author(s):  
D. Thamilselvan ◽  
K. Arulkumar ◽  
M. Kannan
Keyword(s):  
Anaerobic Digestion ◽  
Fossil Fuels ◽  
Biogas Production ◽  
Renewable Resource ◽  
Biogas Plant ◽  
Cow Dung ◽  
Fermentation Time ◽  
Ph Variation ◽  
Biogas Yield ◽  
Oil Crisis

The present day’sresearch interests on bioenergy have been expanded rapidly due to oil crisis of 1980s. This bio energy should be available in locally and it’spurer than the fossil fuels. The field of bio energyis important for governments, scientists and business people in worldwide because of its available in nature and renewable resource. Todays the most important renewable energy is Biomass. The biological conversion of biomass to methane has become rapidly increasing in present days. All types of organic wastes can be converted to methane. In this study the installed plant is a sintex floating type biogas plant. The cubic capacity of plant is about 1000 liter. The pH range is maintained in the level of 6.8 to 7.5. The fermentation time of the anaerobic digestion for the efficient usage of gas as a fuel is about 30 days. Our biogas plant is used for all types of anaerobic respirating wastes such as cow dung manure, kitchen wastes etc.The input feed of kitchen waste is about 10 kg per day. The output of the biogas yield is about 0.714 m3/kg. The composition of biogas is 50% to 60% of methane and rather than remaining 30% to 40% CO2and small amount of water about 2% to 5%. The performance characteristics of biogas plant are studied in this paper. To evaluate the performance of biogas production and pH variation throughout this study.

scholarly journals Evaluating the Potential of Domestic Animal Manure for Biogas Production in Ethiopia

2020 ◽  
Vol 2020 ◽  
pp. 1-4
Author(s):  
Fikadu Kumsa Gemechu
Keyword(s):  
Fossil Fuels ◽  
Biogas Production ◽  
Animal Manure ◽  
Domestic Animal ◽  
Cow Dung ◽  
Renewable Energy Resources ◽  
Biogas Yield ◽  
Sheep Manure ◽  
World Demand ◽  
Materials Used

Energy is one of the most important needy resources that found in the form of renewable and nonrenewable sources. The world demand for energy grows rapidly, and therefore, it is a time to look alternative and renewable energy resources to replace the rapidly depleting supply of fossil fuels. This study is aimed at analyzing the effects of temperature (°C), retention time (days), and potential of animal waste on the biogas production and its %CH4 compositions as responses to the factors of the study. The materials used in this study were cow dung, sheep, and pig manures. Anaerobic batch digesters (plastic water bottle) with a total volume of 2000 ml were used as digester (bioreactor) in this experiment. The glucose drip (tube) was fitted to the lids of each digester. Average temperature of digester was increased starting from the 6th to 10th day in cow dung and sheep manure. In this experiment, optimum time for best biogas yield was recorded. Analysis of the gas component shows the significant volume of methane component recorded in cow dung (66.9%) followed by sheep manure (62.1%). Cow dung was one of the best in producing biogas, while the sheep manure was medium, and pig manures are fewer producers as compared to others.

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