Anaerobic co-digestion of food wastes, algae, pond sludge and cow dung for biogas yield enhancementas a potent approach to reduce carbon footprints

2021 ◽  
pp. 1-20
Author(s):  
Sonam Sandhu ◽  
Rajneesh Kaushal
Keyword(s):  
Cow Dung ◽  
Food Wastes ◽  
Carbon Footprints ◽  
Biogas Yield

scholarly journals Effect of Hydraulic Retention Time on Biogas Production from Cow Dung in A Semi Continuous Anaerobic Digester

2018 ◽  
Vol 7 (2) ◽  
pp. 93-100 ◽  
Author(s):  
Agus Haryanto ◽  
Sugeng Triyono ◽  
Nugroho Hargo Wicaksono
Keyword(s):  
Retention Time ◽  
Hydraulic Retention Time ◽  
Loading Rate ◽  
Biogas Production ◽  
Stable Condition ◽  
Anaerobic Digester ◽  
Organic Loading Rate ◽  
Cow Dung ◽  
Biogas Yield ◽  
Average Analysis

The efficiency of biogas production in semi-continuous anaerobic digester is influenced by several factors, among other is loading rate. This research aimed at determining the effect of hydraulic retention time (HRT) on the biogas yield. Experiment was conducted using lab scale self-designed anaerobic digester of 36-L capacity with substrate of a mixture of fresh cow dung and water at a ratio of 1:1. Experiment was run with substrate initial amount of 25 L and five treatment variations of HRT, namely 1.31 gVS/L/d (P1), 2.47 gVS/L/d (P2), 3.82 gVS/L/d (P3), 5.35 gVS/L/d (P4) and 6.67 gVS/L/d (P5). Digester performance including pH, temperature, and biogas yield was measured every day. After stable condition was achieved, biogas composition was analyzed using a gas chromatograph. A 10-day moving average analysis of biogas production was performed to compare biogas yield of each treatment. Results showed that digesters run quite well with average pH of 6.8-7.0 and average daily temperature 28.7-29.1. The best biogas productivity (77.32 L/kg VSremoval) was found in P1 treatment (organic loading rate of 1.31 g/L/d) with biogas yield of 7.23 L/d. With methane content of 57.23% treatment P1 also produce the highest methane yield. Biogas production showed a stable rate after the day of 44. Modified Gompertz kinetic equation is suitable to model daily biogas yield as a function of digestion time.Article History: Received March 24th 2018; Received in revised form June 2nd 2018; Accepted June 16th 2018; Available onlineHow to Cite This Article: Haryanto, A., Triyono, S., and Wicaksono, N.H. (2018) Effect of Loading Rate on Biogas Production from Cow Dung in A Semi Continuous Anaerobic Digester. Int. Journal of Renewable Energy Development, 7(2), 93-100.https://doi.org/10.14710/ijred.7.2.93-100

Optimization of Biogas Yield From Anaerobic Co-Digestion of Corn-Chaff and Cow Dung Digestate: RSM and Python Approach

2021 ◽  
Author(s):  
Chukwuka Sunday Iweka ◽  
Owuama Kennedy Chinedu ◽  
Jeremiah Lekwuwa Chukwuneke ◽  
Olayomi Abiodun Falowo
Keyword(s):  
Cow Dung ◽  
Biogas Yield

Evaluation of biogas yield and kinetics from the anaerobic co-digestion of cow dung and horse dung: a strategy for sustainable management of livestock manure

2020 ◽  
Author(s):  
Meshach Ileanwa Alfa ◽  
Hilary Ijeoma Owamah ◽  
Anthony Ogochukwu Onokwai ◽  
Sudalaimuthu Gopikumar ◽  
Solomon Olakunle Oyebisi ◽  
...  
Keyword(s):  
Sustainable Management ◽  
Cow Dung ◽  
Livestock Manure ◽  
Biogas Yield

Effect of Organic Loading Rate (OLR) on Biogas Yield Using a Single and Three-Stages Continuous Anaerobic Digestion Reactors

2018 ◽  
Vol 39 ◽  
pp. 147-155 ◽  
Author(s):  
Ejiroghene Kelly Orhorhoro ◽  
Patrick Okechukwu Ebunilo ◽  
Godwin Ejuvwedia Sadjere
Keyword(s):  
Waste Water ◽  
Loading Rate ◽  
Single Stage ◽  
Organic Loading Rate ◽  
Cow Dung ◽  
Organic Loading ◽  
Continuous Increase ◽  
Biogas Yield ◽  
Load Rate ◽  
Three Stages

The rate at which feedstock is added to the anaerobic digester (AD) reactor has to be adjusted for the growth rate of methanogens bacteria. Increase in biogas yield is as a result of improved mathanogens forming bacteria. Under loading and over loading of feedstock in the AD reactor has effect on methanogens forming bacteria. If more feedstock is added than the bacteria are able to degrade, the process will become acidic. Feedstock has to been fed to the reactor at a uniform rate and volume. If feeding pattern has to change, this must be done gradually so that bacteria can adapt to the new conditions. For optimum biogas yield, required amount of feedstock must be added to the AD reactor. The aim of this research work is to determine the effect of organic loading rate (OLR) on biogas yield from food waste, water hyacinth, cow dung, waste water from abattoir, poultry dropping and pig dung. The experimental set up comprises of single stage and three-stage continuous AD reactors. The same quantity and composition of feedstock were used and this was subjected to a variation of OLR 0.5 kg/m3(1.5 kg/m3, 2 kg/m3, 2.5 kg/m3, and 3 kg/m3). The experiment was conducted within a mesophilic temperature range of 36°C-37°C, percentage total solid (%TS) of 9.98% and percentage volatile solid (%VS) of 78%. pH meter was used to monitored the daily pH reading of the slurry. It was observed that the quantity of biogas yield from the feedstock increases with increasing organic load rate to the optimum value of 1.5 kg/m3and started decreasing above the optimum value for a single stage AD reactor but this was not the case for the three-stages continuous AD reactors that experienced continuous increase in biogas yield with a successive increase in OLR from 1-5 kg/m3-3.0 kg/m3.

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。

Effect of Pretreatment of Traditional Chinese Medicine Residue on the Biogas Productivity

2011 ◽  
Vol 335-336 ◽  
pp. 1499-1502
Author(s):  
Yu Ying Li ◽  
Wan Li Gao ◽  
Min Hua Du ◽  
Jie Li ◽  
Zong Jun Cui ◽  
...  
Keyword(s):  
Chinese Medicine ◽  
Traditional Chinese Medicine ◽  
Production Cost ◽  
Cow Dung ◽  
Medium Temperature ◽  
Biogas Yield ◽  
Energy Material ◽  
Exploitation And Utilization ◽  
New Energy ◽  
Biogas Productivity

The object of this study is to open the new ways of exploitation and utilization of traditional Chinese medicine residue (TCMR) as new energy material to produce biogas through indoor simulation tests. The experiment is carried out to study the effect of physical pretreatment by crusher on the biogas productivity of TCMR under medium temperature condition (35°C). TCMR is used as signal fermentation material without foreign elements which is 5% and cow dung is 10% for inoculum. The batch anaerobic digestion technology and the drainage collection biogas method are used. The results show that there is similar total biogas yield between the smashed TCMR and the unsmashed TCMR, of which the former is 9.35 L and the later is 9.28 L during 51 days fermentation. The biogas yield of smashed TCMR is higher than that of TCMR during fermentation starting period, and lower at the later stage. The results suggest that TCMR could be regarded as biogas fermentation material, and should not be smashed in order to economize the production cost.

scholarly journals Anaerobic digestion of mixed dried fallen leaves by mixing with cow dung

2015 ◽  
Vol 50 (3) ◽  
pp. 163-168 ◽  
Author(s):  
MA Rouf ◽  
MS Islam ◽  
T Rabeya ◽  
Ak Mondal
Keyword(s):  
Anaerobic Digestion ◽  
Raw Materials ◽  
Maximum Yield ◽  
Total Solid ◽  
Cow Dung ◽  
Glass Bottle ◽  
Biogas Yield ◽  
Biogas Reactors ◽  
Biogas Reactor ◽  
Fallen Leaves

An investigation was carried out for the production of biogas from dry fallen leaves. The sample was collected from BCSIR campus of Dhaka in winter. The substrate was mixed leaves mainly mahogany (75%), eucalyptus (10 %) and rain tree (15 %) leaves. The study was carried out by whole leaves and crushed leaves directly followed by aerobic pretreatment at 8% total solid (TS) concentration. The raw materials were fed into two liter capacity glass bottle bio digester on batch basis for 60 days at ambient temperature. Different proportion of substrate and cow dung were mixed to get the optimum mix for maximum yield of biogas. The biogas reactor containing 6% crushed and pretreated leaves mixed with 2% cow dung (on 8% TS basis) gave maximum (0.199 l/g) biogas yield. The biogas yield from leaves without pretreatment was found to be too low (0.0106 l/g) for 8%. The COD reduction, VS reduction and methane composition of two biogas reactors have been determined where biogas yield were relatively higher. The maximum methane content of the biogas was found to be about 69.3%.Bangladesh J. Sci. Ind. Res. 50(3), 163-168, 2015

scholarly journals Potential of anaerobic co-digestion in improving the environmental quality of agro-textile wastewater sludge

2020 ◽  
Author(s):  
Jean G. Tapsoba ◽  
Hans C. Komakech ◽  
Johnson Odera Ouma
Keyword(s):  
Heavy Metal ◽  
Sewage Sludge ◽  
Environmental Quality ◽  
Oxygen Demand ◽  
Wastewater Sludge ◽  
Effluent Treatment ◽  
Cow Dung ◽  
Biogas Yield ◽  
Textile Sludge

Abstract Sludge from textile effluent treatment plants (ETP) remains a challenge for many industries due to inefficient and limited waste management strategies. This study explores the potential of using anaerobic digestion (AD) to improve the environmental quality of textile ETP sludge. The AD of ETP sludge is affected by the low C/N ratio (3.7), heavy metal content, and toxicity. To improve the process, co-digestion of ETP sludge with different substrates (sewage sludge, cow dung, and sawdust) under mesophilic conditions (37 °C), followed by a thermochemical pretreatment was assessed. The results showed that anaerobic co-digestion of the textile sludge with the co-substrates is effective in reducing pollution load. It was found that organic matters degraded during the 30-day AD process. The chemical oxygen demand and biological oxygen demand reduction was in the range of 33.1–88.5% and 48.1–67.1%, respectively. Also, heavy metal (cadmium, lead, iron, and, mercury) concentration was slightly reduced after digestion. Maximal biogas yield was achieved from co-digestion of textile sludge and sewage sludge at a mixing ratio of 3:1, 1:1, and 1:3, and methane content was respectively 87.9%, 68.9%, and 69.5% of the gas composition. The results from this study show that co-digestion will not only reduce the environmental pollution and health risks from the textile industry but also recover useful energy.

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