scholarly journals Insights into Anaerobic Co-Digestion of Lignocellulosic Biomass (Sugar Beet By-Products) and Animal Manure in Long-Term Semi-Continuous Assays

2020 ◽  
Vol 10 (15) ◽  
pp. 5126 ◽  
Author(s):  
Kaoutar Aboudi ◽  
Xiomara Gómez-Quiroga ◽  
Carlos José Álvarez-Gallego ◽  
Luis Isidoro Romero-García
Keyword(s):  
Anaerobic Digestion ◽  
Sugar Beet ◽  
Volatile Fatty Acids ◽  
Animal Manure ◽  
Pig Manure ◽  
Cow Manure ◽  
Organic Loading ◽  
Loading Rates ◽  
Classical Parameters ◽  
By Products

Biogas production through anaerobic digestion has proven to be one of the most important pillars of the transition into the circular economy concept, a sustainable approach for biorefinery. This work aims to extend and improve knowledge in the anaerobic co-digestion of complementary substrates, given insights into wastes biodegradability and the influence of manure composition on the anaerobic process stability. Anaerobic co-digestion of sugar beet by-products with two kinds of animal manure (pig and cow) was investigated in semi-continuous assays, analyzing both common and non-classical parameters. Co-digestion with manure clearly mitigated the inhibitory effect of volatile fatty acids at high organic loading rates, leading to increases in methane production by 70% and 31% in comparison with individual digestion of sugar beet by-products, for co-digestion with pig and cow manure, respectively. Non-classical parameters could give more insight into the coupling/uncoupling of the anaerobic digestion phases and the involved microorganisms. Indirect parameters indicated that the process failure at the critical organic loading rates was mainly due to methanogenesis inhibition in the co-digestion with pig manure, while in co-digestion with cow manure or in individual digestion of sugar beet by-products, both hydrolysis–acidogenesis and methanogenesis phases were affected. Biomethanation degree refers to the maximum methane potential of organic wastes. Sugar beet by-products required a long digestion-time to reach high biodegradability. However, short digestion-times for co-digestion assays led to a high biomethanation degree.

Anaerobic digestion of food waste to volatile fatty acids and hydrogen at high organic loading rates in immersed membrane bioreactors

2020 ◽  
Vol 152 ◽  
pp. 1140-1148 ◽  
Author(s):  
Steven Wainaina ◽  
Mukesh Kumar Awasthi ◽  
Ilona Sárvári Horváth ◽  
Mohammad J. Taherzadeh
Keyword(s):  
Fatty Acids ◽  
Anaerobic Digestion ◽  
Food Waste ◽  
Volatile Fatty Acids ◽  
Membrane Bioreactors ◽  
Organic Loading ◽  
Loading Rates

Short term effects of copper, sulfadiazine and difloxacin on the anaerobic digestion of pig manure at low organic loading rates

2012 ◽  
Vol 32 (1) ◽  
pp. 131-136 ◽  
Author(s):  
Jianbin Guo ◽  
Anne Ostermann ◽  
Jan Siemens ◽  
Renjie Dong ◽  
Joachim Clemens
Keyword(s):  
Anaerobic Digestion ◽  
Pig Manure ◽  
Organic Loading ◽  
Short Term ◽  
Loading Rates ◽  
Short Term Effects

Effect of Fe0 addition on volatile fatty acids evolution on anaerobic digestion at high organic loading rates

2018 ◽  
Vol 71 ◽  
pp. 719-727 ◽  
Author(s):  
Xin Kong ◽  
Shuyao Yu ◽  
Shuang Xu ◽  
Wen Fang ◽  
Jianguo Liu ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Anaerobic Digestion ◽  
Volatile Fatty Acids ◽  
Organic Loading ◽  
Loading Rates

scholarly journals Thermophilic Anaerobic Co-Digestion of Exhausted Sugar Beet Pulp with Cow Manure to Boost the Performance of the Process: The Effect of Manure Proportion

Water ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 67
Author(s):  
Xiomara Gómez-Quiroga ◽  
Kaoutar Aboudi ◽  
Luis Alberto Fernández-Güelfo ◽  
Carlos José Álvarez-Gallego ◽  
Luis Isidoro Romero-García
Keyword(s):  
Sugar Beet ◽  
Rural Areas ◽  
Volatile Fatty Acids ◽  
Gompertz Model ◽  
Sugar Beet Pulp ◽  
Cow Manure ◽  
Methane Generation ◽  
Beet Pulp ◽  
By Products ◽  
Modified Gompertz Model

Sugar beet by-products are a lignocellulosic waste generated from sugar beet industry during the sugar production process and stand out for their high carbon content. Moreover, cow manure (CM) is hugely produced in rural areas and livestock industry, which requires proper disposal. Anaerobic digestion of such organic wastes has shown to be a suitable technology for these wastes valorization and bioenergy production. In this context, the biomethane production from the anaerobic co-digestion of exhausted sugar beet pulp (ESBP) and CM was investigated in this study. Four mixtures (0:100, 50:50, 75:25, and 90:10) of cow manure and sugar beet by-products were evaluated for methane generation by thermophilic batch anaerobic co-digestion assays. The results showed the highest methane production was observed in mixtures with 75% of CM (159.5 mL CH4/g VolatileSolids added). Nevertheless, the hydrolysis was inhibited by volatile fatty acids accumulation in the 0:100 mixture, which refers to the assay without CM addition. The modified Gompertz model was used to fit the experimental results of methane productions and the results of the modeling show a good fit between the estimated and the observed data.

Wastewater fermentation and nutrient removal in sequencing batch reactors

1998 ◽  
Vol 38 (1) ◽  
pp. 255-264 ◽  
Author(s):  
Germán Cuevas-Rodríguez ◽  
Óscar González-Barceló ◽  
Simón González-Martínez
Keyword(s):  
Activated Sludge ◽  
Volatile Fatty Acids ◽  
Organic Load ◽  
Batch Reactors ◽  
Sequencing Batch Reactors ◽  
Organic Loading ◽  
Nitrogen And Phosphorus ◽  
Loading Rates ◽  
Average Value ◽  
Experimental Runs

This research project was conducted to analyze the performance of a SBR reactor when being fed with anaerobically fermented wastewater. Important was to determine the capacity of the system to remove nitrogen and phosphorus. Two SBR reactors, each one with a volume of 980 liters, were used: one used as fermenter and the other as activated sludge SBR. Using 8-hour cycles, the reactors were operated and studied during 269 days. The fermenter produced an effluent with an average value of 223±24 mg/l of volatile fatty acids. The activated sludge SBR was tested under 3 organic loading rates of 0.13, 0.25, and 0.35 kgCODtotal/kgTSS·d. For the three tested organic loading rates, PO4-P concentrations under 1.1 mg/l and COD between 37 and 38 mg/l were consistently achieved. Exceptionally high NH4-N influent values were measured during the time of the experimentation with the organic load of 0.25 kgCODtotal/kgTSS·d, not reaching in this case full nitrification. Denitrification was observed during the fill phase in every cycle. SVI values between 40 and 70 were determined during the experimental runs.

Determining Optimal Temperature Combination for Effective Pretreatment and Anaerobic Digestion of Corn Stalk

2021 ◽  
Author(s):  
Juan Li ◽  
Xiujin Li ◽  
Akiber Chufo Wachemo ◽  
Xiaoyu Zuo
Keyword(s):  
Anaerobic Digestion ◽  
Corn Stalk ◽  
Chemical Pretreatment ◽  
Organic Loading ◽  
Factors Affecting ◽  
Stirred Tank Reactors ◽  
Loading Rates ◽  
Hand Temperature ◽  
Thermophilic Anaerobic Digestion ◽  
Pretreatment Temperature

Abstract Temperature is one of the important factors affecting both chemical pretreatment and anaerobic digestion (AD) process of corn stalk (CS). In this work, the combined ways between pretreatment temperature (40℃ and 60℃) and AD temperature (35℃ and 55℃) were selected to investigate the AD performance for sodium hydroxide (NaOH) pretreated CS. Three organic loading rates (OLRs) of 1.6, 1.8 and 2.0 g·L-1·d-1 were studied within 255 days using continuously stirred tank reactors (CSTR). The results revealed that temperature of 40°C was considered as an appropriate for pretreatment whether in mesophilic or thermophilic anaerobic digestion systems. On the other hand, temperature of 35°C and 55°C were chosen as the optimal AD temperatures for lower and higher OLRs, respectively. This study provides a significant insight for exploring the effects of temperatures on the pretreatment and AD of CS.

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