scholarly journals Effect of NaoH Pretreatment of Bagasse on Its Biodegradation through Anaerobic Digestion

2020 ◽  
Vol 8 (5) ◽  
pp. 1883-1887
Keyword(s):  
Anaerobic Digestion ◽  
Biogas Production ◽  
Sugar Industry ◽  
Analytical Techniques ◽  
Batch Mode ◽  
Chemical Structures ◽  
Sugarcane Crop ◽  
Naoh Pretreatment ◽  
Pretreated Bagasse ◽  
Excess Power

Bagasse the by-product of sugarcane crop, mainly utilized by the sugar industry itself in cogeneration power plant to produce power through cogeneration to full-fill their energy needs and export the excess power generated to the grid. The present study was conducted to analyze the effect of (2%, 4% and 6%) NaOH pretreatment of bagasse at room temperature for 24 hours on the biogas production through anaerobic digestion. NaOH pretreated and untreated bagasse co-digested with cow manure was assessed to optimize the NaOH concentration for enhanced biogas production in batch mode experiments. Analytical techniques such as Field Effect Scanning Electron Microscope (FESEM), Fourier Transform Infra-Red (FTIR) and X-ray diffractometer (XRD) were used to investigate the changes on physical and chemical structures of pretreated bagasse. The 4% NaOH pretreatment resulted in highest biogas production which is 55.3% higher than untreated bagasse.

scholarly journals Evaluation on the Methane Production Potential of Wood Waste Pretreated with NaOH and Co-Digested with Pig Manure

Catalysts ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 539 ◽  
Author(s):  
Renfei Li ◽  
Wenbing Tan ◽  
Xinyu Zhao ◽  
Qiuling Dang ◽  
Qidao Song ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Lignocellulosic Biomass ◽  
Methane Production ◽  
Biogas Production ◽  
Untreated Wood ◽  
Wood Waste ◽  
Methane Yield ◽  
Pig Manure ◽  
Naoh Pretreatment ◽  
Digestion Technique

Wood waste generated during the tree felling and processing is a rich, green, and renewable lignocellulosic biomass. However, an effective method to apply wood waste in anaerobic digestion is lacking. The high carbon to nitrogen (C/N) ratio and rich lignin content of wood waste are the major limiting factors for high biogas production. NaOH pre-treatment for lignocellulosic biomass is a promising approach to weaken the adverse effect of complex crystalline cellulosic structure on biogas production in anaerobic digestion, and the synergistic integration of lignocellulosic biomass with low C/N ratio biomass in anaerobic digestion is a logical option to balance the excessive C/N ratio. Here, we assessed the improvement of methane production of wood waste in anaerobic digestion by NaOH pretreatment, co-digestion technique, and their combination. The results showed that the methane yield of the single digestion of wood waste was increased by 38.5% after NaOH pretreatment compared with the untreated wood waste. The methane production of the co-digestion of wood waste and pig manure was higher than that of the single digestion of wood waste and had nonsignificant difference with the single-digestion of pig manure. The methane yield of the co-digestion of wood waste pretreated with NaOH and pig manure was increased by 75.8% than that of the untreated wood waste. The findings indicated that wood waste as a sustainable biomass source has considerable potential to achieve high biogas production in anaerobic digestion.

The Influence of NaOH Pretreatment to Biogas Production from Rice Husk Waste by Using Solid State Anaerobic Digestion (SS-AD)

2018 ◽  
Vol 24 (12) ◽  
pp. 9875-9876
Author(s):  
Winardi Dwi Nugraha ◽  
Syafrudin ◽  
Windy Surya Permana ◽  
Hashfi Hawali Abdul Matin ◽  
Budiyono
Keyword(s):  
Anaerobic Digestion ◽  
Solid State ◽  
Rice Husk ◽  
Biogas Production ◽  
Naoh Pretreatment

Experiments on Anaerobic Digestion of Rice Straw for Biogas Production under NaOH Pretreatment

2014 ◽  
Vol 953-954 ◽  
pp. 220-223
Author(s):  
Ben Lin Dai ◽  
An Feng Zhu ◽  
Fei Hu Mu ◽  
Ning Xu ◽  
Zhen Wu
Keyword(s):  
Anaerobic Digestion ◽  
Rice Straw ◽  
Biogas Production ◽  
Laboratory Scale ◽  
Biogas Slurry ◽  
Naoh Pretreatment ◽  
Pretreatment Technology ◽  
Peak Value

To discuss the effect of NaOH pretreatment technology for biogas production and methane (CH4) content enhancement during the anaerobic digestion of rice straw waste, a self-designed laboratory-scale continuous anaerobic biogas digester was used in this study. Anaerobic biogas slurry, NaOH pretreatment and anaerobic digestion were evaluated for biogas production from rice straw. The results showed that the peak value of biogas production was attained on the 16th day by using 6% NaOH pretreatment on rice straw. However, the highest CH4 content was 60.8% on the 24th day for the 4% NaOH-treated rice straw. The cumulative biogas production of 6% NaOH pretreatment was the highest, about 18 720 mL, which was followed by 8% NaOH (15 057 mL), 4% NaOH (12 103 mL), and 2% NaOH (10 754 mL).

scholarly journals Production of Biogas from an Agro-industrial Waste and its Characteristics

2014 ◽  
Vol 6 (2) ◽  
pp. 347-357 ◽  
Author(s):  
K. Iqbal ◽  
T. Aftab ◽  
J. Iqbal ◽  
S. Aslam ◽  
R. Ahmed
Keyword(s):  
Anaerobic Digestion ◽  
Industrial Waste ◽  
Biogas Production ◽  
Sugar Industry ◽  
Gas Production ◽  
Anaerobic Conditions ◽  
Water Displacement ◽  
Biogas Yield ◽  
Batch Bioreactor ◽  
Volatile Solids

Molasses is a significant by-product of sugar industry and can be used as substrate in anaerobic digestion process for biogas production. Molasses was diluted ten time; inoculated by methane producing bacteria, mixed thoroughly in 2 liter batch bioreactor, kept at 370C for 15 days under anaerobic conditions for biogas yield. pH in the process was monitored three times a day. Total solids, volatile solids and COD were measured at alternate days. The gas production was measured by water displacement method. Ten times diluted molasses under anaerobic conditions, in the presence of methane producing bacteria was converted to 6.55 dm3/kg of biogas or 3.93 dm3/kg CH4 and 0.144 kWh electricity.  Keywords: Agro industrial waste; Molasses; Methanogen; Anaerobic digestion; Biogas production. © 2014 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved. doi: http://dx.doi.org/10.3329/jsr.v6i2.17320 J. Sci. Res. 6 (2), 347-357 (2014)

scholarly journals Influence of moisture content of solid-state NaOH pretreatment and codigestion on methane production in the semi-dry anaerobic digestion of rose stalk

BioResources ◽  
2019 ◽  
Vol 14 (2) ◽  
pp. 4210-4223
Author(s):  
Yongsheng Chen ◽  
Zhijuan Ke ◽  
Yue-gan Liang
Keyword(s):  
Anaerobic Digestion ◽  
Solid State ◽  
Moisture Content ◽  
Methane Production ◽  
Biogas Production ◽  
Pig Manure ◽  
Naoh Pretreatment ◽  
Production Kinetics ◽  
Anaerobic Codigestion ◽  
Dry Anaerobic Digestion

Large quantities of burned or abandoned rose stalks are leading to serious environmental pollution. In this study, the effect of the moisture content of a solid-state NaOH pretreatment on methane production was first determined by a biochemical methane potential test. Then, the effect of codigestion with pig manure on methane production was investigated under the optimal moisture via thermophilic semi-dry anaerobic digestion by leaching bed reactor. Biogas production kinetic was assessed by the first-order kinetic model and modified Gompertz model. An increase in methane yield and biogas production kinetics was shown in the solid-state NaOH pretreated biomass. There was no significant difference in methane production for the three moisture contents studied during pretreatment (54%, 70%, and 77%). The anaerobic codigestion of rose stalk and pig manure increased 41% to 52% for methane yields and improved biogas production kinetics compared with monodigestion of rose stalk. Anaerobic codigestion did not greatly change the process stability, except for NH4+-N. The optimal process for the anaerobic digestion of rose stalk was as follows. The rose stalk was initially pretreated via solid-state NaOH pretreatment with a moisture content of 70%. Then, the pretreated rose stalk was co-digested with pig manure at a total solids ratio of 1:1.

scholarly journals Processing High-Solid and High-Ammonia Rich Manures in a Two-Stage (Liquid-Solid) Low-Temperature Anaerobic Digestion Process: Start-Up and Operating Strategies

2020 ◽  
Vol 7 (3) ◽  
pp. 80 ◽  
Author(s):  
Prativa Mahato ◽  
Bernard Goyette ◽  
Md. Saifur Rahaman ◽  
Rajinikanth Rajagopal
Keyword(s):  
Anaerobic Digestion ◽  
Energy Demand ◽  
Biogas Production ◽  
Oxygen Demand ◽  
High Energy ◽  
Poultry Production ◽  
Livestock Farming ◽  
Two Stage ◽  
Batch Mode ◽  
Digestion Process

Globally, livestock and poultry production leads to total emissions of 7.1 Gigatonnes of CO2-equiv per year, representing 14.5% of all anthropogenic greenhouse gas emissions. Anaerobic digestion (AD) is one of the sustainable approaches to generate methane (CH4) from manure, but the risk of ammonia inhibition in high-solids AD can limit the process. Our objective was to develop a two-stage (liquid–solid) AD biotechnology, treating chicken (CM) + dairy cow (DM) manure mixtures at 20 °C using adapted liquid inoculum that could make livestock farming more sustainable. The effect of organic loading rates (OLR), cycle length, and the mode of operation (particularly liquid inoculum recirculation-percolation mode) was evaluated in a two-stage closed-loop system. After the inoculum adaptation phase, aforementioned two-stage batch-mode AD operation was conducted for the co-digestion of CM + DM (Total Solids (TS): 48–51% and Total Kjeldahl Nitrogen (TKN): 13.5 g/L) at an OLR of 3.7–4.7 gVS/L.d. Two cycles of different cycle lengths (112-d and 78-d for cycles 1 and 2, respectively) were operated with a CM:DM mix ratio of 1:1 (w/w) based on a fresh weight basis. Specific methane yield (SMY) of 0.35 ± 0.11 L CH4g/VSfed was obtained with a CH4 concentration of above 60% for both the cycles and Soluble Chemical Oxygen Demand (CODs) and volatile solid (VS) reductions up to 85% and 60%, respectively. For a comparison purpose, a similar batch-mode operation was conducted for mono-digestion of CM (TS: 65–73% and TKN: 21–23 g/L), which resulted in a SMY of 0.52 ± 0.13 L CH4g/VSfed. In terms of efficiency towards methane-rich biogas production and ammonia inhibitions, CM + DM co-digestion showed comparatively better quality methane and generated lower free ammonia than CM mono-digestion. Further study is underway to optimize the operating parameters for the co-digestion process and to overcome inhibitions and high energy demand, especially for cold countries.

scholarly journals BIOGAS PRODUCTION KINETIC FROM VINASSE WASTE IN BATCH MODE ANAEROBIC DIGESTION

2013 ◽  
Vol 32 (2) ◽  
pp. 2-14 ◽  
Author(s):  
Budiyono Budiyono ◽  
Iqbal Syaichurrozi ◽  
Siswo Sumardiono
Keyword(s):  
Anaerobic Digestion ◽  
Biogas Production ◽  
Batch Mode
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