Biogas potential from spent tea waste: A laboratory scale investigation of co-digestion with cow manure

Khayum, Naseem; Anbarasu, S.; Murugan, S.

doi:10.1016/j.energy.2018.09.163

Cited by 89 publications

(46 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A modification of earlier methods [12,15,40] was used in this design, the value employed for the various variables were: (i) Exposure time (55,65,75, 85 and 95 min) (ii) shaker temperature (20, 25, 30, 35 and 40 C), (iii) Agitation (115, 125, 135, 145 and 155 rpm), (iv) Dry mass (3, 4.5, 6, 7.5 and 9 g) and (v) H 2 O 2 concentration (2,4,6,8 and 10% (v.v À1 )). In order to reduce the incidence of foaming due to the presence of hydrogen peroxide, 0.5 mL of antifoam agent (Biocane FC 500, Brazil) was added to the setup.…”

Section: Alkaline Pretreatmentmentioning

confidence: 99%

See 1 more Smart Citation

Liquefaction of pineapple peel: Pretreatment and process optimization

Dahunsi

2019

Energy

View full text Add to dashboard Cite

a b s t r a c tThis study explored the optimization of pretreatment of pineapple peel for biogas generation. Pretreatments were carried out sulfuric acid and alkaline hydrogen peroxide prior to anaerobic digestion while the response surface methodology (RSM) was used for optimization of the pretreatment procedures. The physical, chemical, proximate and structural compositions of the peels were determined prior to and at the end of the pretreatment procedures. The dynamics of microorganisms in the reactors were also evaluated by rapid molecular methods while the Fourier Transform Infra-red (FTIR) spectroscopy was employed in the identification of the chemical changes as a result of pretreatments. The use of H 2 O 2 pretreatment caused enormous lignin solubilization in the pineapple peel. In comparison, biogas production was 67% more in the alkaline pretreated pineapple peel than the biomass treated with acid and also 51% over the untreated samples. The total biogas volume produced from the acidic pretreated, alkaline pretreated, not sifted untreated and sifted untreated samples are 194.2 ± 3.0, 587.5 ± 5.2, 287.8 ± 2.1 and 245.4 ± 3.1 respectively. Thus, the alkaline pretreated experiment used lower retention time to achieve maximum gas production in this study. The use of alkaline H 2 O 2 on lignocelluloses has remained unpopular prior to this study. However, its usage in this study yielded better result than all the conventional treatments in terms of lignin solubilization and improvement in methane yield. Economically, the use of H 2 O 2 for pretreatment is adjudged feasible because the 1504 kWh t À1 TS thermal energy gain obtained from the biogas produced by the alkaline treated peel exceeded the 921 kWh t À1 TS used in the pretreatment. This gives a net thermal energy of 583 kWh t À1 TS. Whereas, the investment into acidic pretreatment of pineapple peel may not be economically justified because the total thermal energy gain of À200 kWh t À1 TS was far lower than the 1236 kWh t À1 TS thermal energy that was consumed during the pretreatment giving a net thermal energy of À1436 kWh t À1 TS. Therefore, the use of mild alkaline pretreatment is advocated in biogas generation from pineapple peel and also for biofertilizer production mostly in localities of mass production.

show abstract

Section: Alkaline Pretreatmentmentioning

confidence: 99%

“…Fossil fuels constitute well over 80% of global energy resources. However, these fuels are not renewable and cause the bulk of environmental degradation via the enormous production of CO 2 and other greenhouse gases [4]. This phenomenon has therefore given rise to alternative and renewable energy generation from wastes and biomass [5e7].…”

Section: Introductionmentioning

confidence: 99%

Liquefaction of pineapple peel: Pretreatment and process optimization

Dahunsi

2019

Energy

View full text Add to dashboard Cite

show abstract

“…The precursors of these occurrences are combustion of fossil fuels leading to pollution menace and the indiscriminate dumping of organic wastes leading to release of anthropogenic gases (Bacenetti et al, 2013). Across the globe, several measures are being taken by many countries and government at various levels to address the issue of global warming and these include: use of combustion devices capable of reducing emissions, adoption of renewable alternative energy and effective management of wastes (Khayum et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Co-digestion of Theobroma cacao (Cocoa) pod husk and poultry manure for energy generation: Effects of pretreatment methods

Dahunsi

Osueke

Olayanju

et al. 2019

Bioresource Technology

View full text Add to dashboard Cite

In this study, biogas was produced from the anaerobic co-digestion of Cocoa pod husk (CPH) and poultry manure. Pretreatment of the CPH was carried out using sulfuric acid and hydrogen peroxide. The physicochemical, elemental and structural analyses were carried out on the CPH before and after pretreatment. The microbial composition of the fermenting materials were also determined using standard method while the Fourier Transform Infra-red (FTIR) spectroscopy was used to identify the structural changes that took place after pretreatments. Use of alkaline hydrogen peroxide caused high solubilization of the lignin component of the CPH and reduced up to 81% of lignin i.e. initial value of 21.7% m.m −1 to final value of 4.2% m.m −1. Similarly, the alkali reduced the hemicellulose content of the CPH from 27.0% m.m −1 to 8.5% m.m −1. Overall, there was 68% increase in biogas volume from the alkaline pretreated CPH.

show abstract

“…The TS reduction was lower than VS reduction in all samples. Khayum et al [32] reported two-fold decrease in TS and VS, resulting in a 3-5-fold increase in biogas production. As the anaerobic bacteria became activated, the amount of sludge decreased, and biogas production increased.…”

Section: Sludge Reduction In Anaerobic Co-digestionmentioning

confidence: 99%

Influence of acidogenic fermented fish by-products with rice bran for sludge reduction and biogas recovery in anaerobic co-digestion

Choi

2020

Environmental Engineering Research

View full text Add to dashboard Cite

The purpose of this study was to investigate the effects of acidogenic fermentation broth with rice bran (RFFB), tap water (TFFB), or raw fishery by-products (FBs) on sludge reduction and biogas production in an anaerobic co-digestion process. Acidogenic fermentation of FBs with rice bran was faster and produced more volatile fatty acids than that with tap water. Reduction efficiencies for chemical oxygen demand, volatile solids, and total solids were highest in RFFB. In the kinetic analysis, λ (d), which represents the duration of the lag phase, was shortest with RFFB (1.09 d) and highest in sewage sludge (8.86 d). As the loading amount of volatile solids and chemical oxygen demand increased, the amount of cumulative biogas also increased. Amount of produced methane and energy recovery were highest with RFFB (5.71 kWh). Anaerobic co-digestion of FFB and sewage sludge allowed reduced sludge and recovered energy using the discarded waste as an organic carbon source.

show abstract

Biogas potential from spent tea waste: A laboratory scale investigation of co-digestion with cow manure

Cited by 89 publications

References 42 publications

Liquefaction of pineapple peel: Pretreatment and process optimization

Liquefaction of pineapple peel: Pretreatment and process optimization

Co-digestion of Theobroma cacao (Cocoa) pod husk and poultry manure for energy generation: Effects of pretreatment methods

Influence of acidogenic fermented fish by-products with rice bran for sludge reduction and biogas recovery in anaerobic co-digestion

Contact Info

Product

Resources

About