Binary and ternary trace elements to enhance anaerobic digestion of cattle manure: Focusing on kinetic models for biogas production and digestate utilization

2021 ◽  
Vol 323 ◽  
pp. 124571
Author(s):  
Kaijun Wang ◽  
Sining Yun ◽  
Tian Xing ◽  
Bingjie Li ◽  
Yasir Abbas ◽  
...  
Keyword(s):  
Trace Elements ◽  
Anaerobic Digestion ◽  
Kinetic Models ◽  
Biogas Production ◽  
Cattle Manure

Study on the biogas potential of anaerobic digestion of coffee husks wastes in Ethiopia

2020 ◽  
pp. 0734242X2093961 ◽  
Author(s):  
Ning Du ◽  
Meng Li ◽  
Qian Zhang ◽  
Mihret Dananto Ulsido ◽  
Ruyi Xu ◽  
...  
Keyword(s):  
Trace Elements ◽  
Organic Matter ◽  
Anaerobic Digestion ◽  
Volatile Fatty Acids ◽  
Biogas Production ◽  
Dual Purpose ◽  
Effective Utilization ◽  
Leading Role ◽  
Initial Ph ◽  
Waste Reclamation

The poorly controlled discharge of coffee husks in Ethiopia causes severe environmental pollution and is a waste of resources. The volatile solid and carbon content in coffee husks waste indicates that it is rich in organic matter and has huge potential to produce biogas. This study investigated the feasibility of coffee husks to produce biomass through anaerobic digestion, based on temperature, initial pH, inoculum/substrate (I/S) ratio and carbon/nitrogen (C/N) ratio. The study demonstrated that the maximum production of biogas and methane reached 3359.6 ml and 2127.30 ml, respectively, under the conditions of mesophilic temperature (35±1°C), an initial pH of 7, an I/S ratio of 0.75 and a C/N ratio of 30. Based on this result, the effects of trace elements (Fe2+, Ni2+, Co2+) on biogas production and methane content were also explored. Compared with the group with no addition of trace elements, the experiment adding trace elements had significant enhancement effects on the production of biogas and methane, in which Fe2+ played a leading role ( p<0.05). Fe2+ promoted the hydrolysis and acidification of coffee husks, resulting in the production of a series of intermediates such as volatile fatty acids and the other kinds of dissolved organic matter. Furthermore, the cooperation of Ni2+, Co2+ and Fe2+ enhanced the activity of the enzyme system in methanogens, promoting methane production. The results in this paper show that coffee husks have clear biogas potential through anaerobic digestion, and its effective utilization could fulfill the dual purpose of solid waste reclamation and local environmental protection in Ethiopia.

The valuation of malnutrition in the mono-digestion of maize silage by anaerobic batch tests

2008 ◽  
Vol 58 (7) ◽  
pp. 1453-1459 ◽  
Author(s):  
L. Hinken ◽  
I. Urban ◽  
E. Haun ◽  
I. Urban ◽  
D. Weichgrebe ◽  
...  
Keyword(s):  
Trace Elements ◽  
Anaerobic Digestion ◽  
Trace Element ◽  
Biogas Production ◽  
Renewable Energy Sources ◽  
Anaerobic Bacteria ◽  
Trace Element Content ◽  
Energy Crops ◽  
Maize Silage ◽  
Batch Tests

Anaerobic digestion is a technology which is used to produce methane from organic solids and energy crops. Especially in recent years, the fermentation of energy crops has become more and more important because of increasing costs for energy and special benefits for renewable energy sources in Germany. Anaerobic bacteria require macro and micro nutrients to grow. Absence of these elements can inhibit the anaerobic process significantly. In particular mono-substrates like maize or certain industrial wastewater often cannot provide all required nutrients. For this reason this research investigates the influence of substrate and trace elements on anaerobic digestion in detail. Different agricultural anaerobic biomasses are analysed with special regard to their trace element content. Based on these results, the influence of three trace elements (iron, cobalt, and nickel) on anaerobic digestion was studied in anaerobic batch tests at different sludge loading rates and for different substrates (maize and acetate). Biogas production was found to be 35% for maize silage and up to 70% higher for acetate with trace element dosage than in the reference reactor.

Statistical modelling of the impact of some polyphenols on the efficiency of anaerobic digestion and the co-digestion of the wine distillery wastewater with dairy cattle manure and cheese whey

2010 ◽  
Vol 62 (3) ◽  
pp. 475-483 ◽  
Author(s):  
M. Akassou ◽  
A. Kaanane ◽  
A. Crolla ◽  
C. Kinsley
Keyword(s):  
Anaerobic Digestion ◽  
Dairy Cattle ◽  
Biogas Production ◽  
Degradation Kinetics ◽  
Inhibitory Effect ◽  
Cattle Manure ◽  
Coumaric Acid ◽  
Biogas Yield ◽  
Distillery Wastewater ◽  
The Impact

The objective of this study was to determine the effectiveness of anaerobic digestion in the treatment of polyphenols (PP) present in olive mill wastewater (OMW) and wine distillery wastewater (WDW). Anaerobic Toxicity Assay (ATA) was conducted to assess the impact of the most representative phenolic compounds present in OMW and WDW: catechol, tannins and p-Coumaric acid, on biogas production. The results from this study show that tannins do not present any inhibitory effect on methanogenesis at a concentration level of 1,664 ppm, whereas catechol has an inhibitory effect at 1,664 ppm. In addition, p-Coumaric acid was strongly inhibitory at 50 ppm. The co-digestion of OMW and WDW with other effluents was proposed as a solution for reducing the load of PP in the anaerobic medium. Biochemical methane potential (BMP) tests were carried out for dairy cattle manure and mixtures of five PP. A central composite design was implemented on the BMP tests to model the biogas production response and the degradation kinetics of PP. The co-digestion of WDW with cattle manure and/or whey was also investigated in BMP tests. The results show that the digestion was optimal at a ratio of 16: 64: 20 (WDW: manure: inoculum) with a maximum biogas yield of 172 mL/g of VS and 66% COD removal.

Performance, Microbial Community Analysis and Fertilizer Value of Anaerobic Co-digestion of Cattle Manure with Waste Kitchen Oil

2019 ◽  
Vol 35 (2) ◽  
pp. 239-248 ◽  
Author(s):  
Ricardo Galbiatti Sandoval Nogueira ◽  
Teng Teeh Lim ◽  
Haoqi Wang ◽  
Paulo Henrique Mazza Rodrigues
Keyword(s):  
Anaerobic Digestion ◽  
Hydraulic Retention Time ◽  
Biogas Production ◽  
Preliminary Test ◽  
Community Analysis ◽  
Cattle Manure ◽  
Microbial Community Analysis ◽  
Fertilizer Value ◽  
Replication Control ◽  
Mesophilic Conditions

Abstract. Co-digestion trials of beef cattle manure and waste kitchen oil (WKO) were conducted to evaluate potential increase of biogas production for a local beef farm anaerobic digester. The trials were conducted using laboratory-scale, semi-continuously loaded digesters under mesophilic conditions, with 21-day hydraulic retention time (HRT). In a preliminary test, WKO was added at 0%, 0.5%, 1.0%, 1.5%, and 2.0% by volume, each with replicate digesters (n=2), except for the 0% level, which had one digester (n=1). Methane (CH4) yield per week increased linearly with WKO levels. Populations of bacteriodetes decreased, while clostridiales and synergistales increased with the WKO levels. A second test was conducted using treatments with more replication: control (n=3), and 1.0% (n=3) and 2% (n=3) WKO levels. Methane yields of the 1.0% and 2.0% WKO levels were 79.1% and 203% higher than the control, respectively. Addition of WKO have resulted in changes of the metagenomics of the digesters. Populations of clostridiales increased, while bacteroidales and euryarchaeota methanomicrobia YC-E6 decreased with the WKO levels. The findings confirm adding low amounts (1% and 2%) of WKO as co-digestion feedstock can be an effective way to increase CH4 yield for beef operation anaerobic digestion, especially when there are available feedstock nearby. Keywords: Anaerobic digestion, Biogas, Methane, Semi-continuous digesters.

Influence of palm oil mill effluent as inoculum on anaerobic digestion of cattle manure for biogas production

2013 ◽  
Vol 141 ◽  
pp. 174-176 ◽  
Author(s):  
Mohammed Saidu ◽  
Ali Yuzir ◽  
Mohd Razman Salim ◽  
Salmiati ◽  
Shamila Azman ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Palm Oil ◽  
Biogas Production ◽  
Cattle Manure ◽  
Palm Oil Mill Effluent ◽  
Palm Oil Mill

Biological pre-treated oil palm mesocarp fibre with cattle manure for biogas production by anaerobic digestion during acclimatization phase

2014 ◽  
Vol 95 ◽  
pp. 189-194 ◽  
Author(s):  
Mohammed Saidu ◽  
Ali Yuzir ◽  
Mohd Razman Salim ◽  
Salmiati ◽  
Shamila Azman ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Oil Palm ◽  
Biogas Production ◽  
Cattle Manure

scholarly journals Substrate-induced pH changes and process stability of anaerobic digestion of shea waste

2021 ◽  
Vol 24 (12) ◽  
pp. 2035-2042
Author(s):  
Martin Ampadu Ofosu ◽  
Melvin-Guy Adonadaga ◽  
Isaac Sackey ◽  
Boateng Ampadu
Keyword(s):  
Anaerobic Digestion ◽  
Volatile Fatty Acids ◽  
Environmental Concern ◽  
Biogas Production ◽  
Cattle Manure ◽  
Shea Butter ◽  
Cattle Dung ◽  
Process Stability ◽  
Alternative Source ◽  
Ph Changes

Shea butter extraction involves the generation of waste of environmental concern. To help find a solution to the management of this waste, and to search for an alternative source of energy, this study was carried out to investigate the potential of shea waste in generating methane gas through anaerobic digestion. At high concentrations, volatile fatty acids produce a low pH, which may inhibit hydrolysis, thereby affecting the stability of the anaerobic digestion process. The influence of pH changes on process stability (or otherwise) was also investigated. The study involved two fermentation processes: mono-fermentation and co-fermentation involving a mix of shea waste and cattle dung. The mono-fermentation investigations comprised six treatments - three organic dry matter concentrations of 7%, 5% and 3%, combined with two hydraulic retention times of 30 and 60 days. The co-fermentation investigations comprised three treatments of shea waste and cattle manure mix in proportions (by volume) of 50:50, 75:25 and 90:10. The results showed that changes in pH were a good parameter for indicating process instability. The results also showed that monofermentation of shea waste was not a viable option in anaerobic digestion for biogas production, whilst only the substrate with 50% cattle manure in the co-fermentation trials showed process stability, producing biogas with adequate methane content.

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