Optimization of biogas production from water hyacinth (Eichhornia crassipes)

Rozy, Rozy; Dar, Rouf Ahmad; Phutela, Urmila Gupta

doi:10.31018/jans.v9i4.1489

Cited by 13 publications

(11 citation statements)

References 12 publications

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“…Methane is produced by anaerobic methanogens, which are very sensitive to changes in environmental conditions such as pH and temperature. Optimal activity of methanogens in previous studies has been recorded at pH 6.5–7.5 and this supports the results of this study where the pH of most of the treatments (digestate) was in an optimal range that supported the growth of methanogens suggesting stability of the AD process (Rozy et al 2017 ; Cerón-Vivas et al 2019 ). Increased pH relates to accumulated ammonium, however, the presence of accumulated ammonia in the digesters though toxic to methanogens, further supports the utilization of the resultant digestate as a soil ameliorant (Zhang et al 2017 ; Adeleke et al 2019 ).…”

Section: Discussionsupporting

confidence: 91%

Bioaugmentation potential of inoculum derived from anaerobic digestion feedstock for enhanced methane production using water hyacinth

Linda

Roopnarain

Tekere

et al. 2023

World J Microbiol Biotechnol

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The utilisation of water hyacinth for production of biogas is considered to be a solution to both its control and the global renewable energy challenge. In this instance, an investigation was conducted to evaluate the potential of water hyacinth inoculum to enhance methane production during anaerobic digestion (AD). Chopped whole water hyacinth (10% (w/v)) was digested to prepare an inoculum consisting mainly of water hyacinth indigenous microbes. The inoculum was incorporated in the AD of freshly chopped whole water hyacinth to set up different ratios of water hyacinth inoculum and water hyacinth mixture with appropriate controls. The results of batch tests with water hyacinth inoculum showed a maximal cumulative volume of 211.67 ml of methane after 29 days of AD as opposed to 88.6 ml of methane generated from the control treatment without inoculum. In addition to improving methane production, inclusion of water hyacinth inoculum reduced the electrical conductivity (EC) values of the resultant digestate, and, amplification of nifH and phoD genes in the digestate accentuates it as a potential soil ameliorant. This study provides an insight into the potential of water hyacinth inoculum to enhance methane production and contribute to the feasibility of the digestate as a soil fertility enhancer.

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Section: Discussionsupporting

confidence: 91%

Bioaugmentation potential of inoculum derived from anaerobic digestion feedstock for enhanced methane production using water hyacinth

Linda

Roopnarain

Tekere

et al. 2023

World J Microbiol Biotechnol

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“…Patil et al (2011) performed the anaerobic digestion of natural water hyacinth with different amounts of water, observing a maximum biogas yield of 0.245 l/g VS when using water hyacinth slurry in a ratio of 1:4, in the mesophilic temperature range of 30 °C-37 °C for 60 days. Rozy et al (2017) reported a biogas production of 0.045 l/g water hyacinth, 0.3601 l/g TS, and 0.398 l/g VS in optimal conditions within 40 days. O' Sullivan et al (2010) obtained a biogas production potential of 0.2-0.4 l/g VS with water hyacinth.…”

Section: Daily Biogas Productionmentioning

confidence: 98%

The Utilization of Water Hyacinth for Biogas Production in a Plug Flow Anaerobic Digester

Soeprijanto

Warmadewanthi

Muntini

et al. 2020

Int. J. Renew. Energy Dev.

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Water hyacinth (Eichhornia crassipes) causes ecological and economic problems because it grows very fast and quickly consumes nutrients and oxygen in water bodies, affecting both the flora and fauna; besides, it can form blockages in the waterways, hindering fishing and boat use. However, this plant contains bioactive compounds that can be used to produce biofuels. This study investigated the effect of various substrates as feedstock for biogas production. A 125-l plug-flow anaerobic digester was utilized and the hydraulic retention time was 14 days; cow dung was inoculated into water hyacinth at a 2:1 mass ratio over 7 days. The maximum biogas yield, achieved using a mixture of natural water hyacinth and water (NWH-W), was 0.398 l/g volatile solids (VS). The cow dung/water (CD-W), hydrothermally pretreated water hyacinth/digestate, and hydrothermally pretreated water hyacinth/water (TWH-W) mixtures reached biogas yields of 0.239, 0.2198, and 0.115 l/g VS, respectively. The NWH-W composition was 70.57% CH4, 12.26% CO2, 1.32% H2S, and 0.65% NH3. The modified Gompertz kinetic model provided data satisfactorily compatible with the experimental one to determine the biogas production from various substrates. TWH-W and NWH-W achieved, respectively, the shortest and (6.561 days) and the longest (7.281 days) lag phase, the lowest (0.133 (l/g VS)/day) and the highest (0.446 (l/g VS)/day) biogas production rate, and the maximum and (15.719 l/g VS) and minimum (4.454 l/g VS) biogas yield potential.

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“…Lag phases were attributed to methane precursors’ consumption by methanogens for growth or the accumulation of volatile fatty acids that led to short‐term inhibition of the digestion process, while the peaks were attributed to the varying levels of digestibility of the substrates. [ 21 ]…”

Section: Resultsmentioning

confidence: 99%

“…[ 10 ] The dried WH (leaves, stems, and roots) was then cut into smaller pieces of about 1–5 cm to increase the surface area of the WH for easy biodegradability. According to Rozy et al., [ 21 ] optimization of different WH particle sizes (1–3 cm) may help to increase active sites for methanogens to grow resulting in higher biogas yield.…”

Section: Methodsmentioning

confidence: 99%

“…Lag phases were attributed to methane precursors' consumption by methanogens for growth or the accumulation of volatile fatty acids that led to short-term inhibition of the digestion process, while the peaks were attributed to the varying levels of digestibility of the substrates. [21] Figure 2b shows the cumulative biogas production from all mixing ratios. Statistical analysis through non-parametric tests using Friedman repeated measure test proved that there were significant differences between the ratios and between the digestion days (p < 0.05).…”

Section: Effect Of Co-digestion and Mixing Ratios On Biogas Productionmentioning

confidence: 99%

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Co‐Digestion of Water Hyacinth and Duck Manure for Potential Low‐Cost Biogas Production by Rural Communities

Jamaluddin

Zulkeflee

2023

CLEAN Soil Air Water

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Leftover harvested water hyacinth biomass and duck manure can create waste management issues. As they are readily abundant and available, potential co-digestion of both waste sources for biogas production is explored as a waste-to-energy approach for a rural fishermen community. Seven 19-L do-it-yourself bioreactors are constructed with four different feedstock mixing ratios. The mixing ratios of water hyacinth to duck manure are varied at 70:30, 50:50, and 30:70, and are conducted in duplicate. One reactor utilizing 100% water hyacinth as feedstock acts as the control. Biogas production is measured daily for 50 days through the water displacement method. Variations in pH and chemical oxygen demand levels are monitored weekly. The results show that the highest biogas production is from the mixture of water hyacinth to duck manure at a 70:30 ratio (p < 0.05), with a volume of cumulative gas produced at 4.27 L that can be well simulated through the logistic function kinetic model (R 2 = 0.965). The biogas produced consists of methane, carbon monoxide, and hydrogen sulfide. The findings prove the potential of water hyacinth and duck manure as feedstocks for biogas production as one of the waste management solutions that can be practiced by the community.

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Optimization of biogas production from water hyacinth (Eichhornia crassipes)

Cited by 13 publications

References 12 publications

Bioaugmentation potential of inoculum derived from anaerobic digestion feedstock for enhanced methane production using water hyacinth

Bioaugmentation potential of inoculum derived from anaerobic digestion feedstock for enhanced methane production using water hyacinth

The Utilization of Water Hyacinth for Biogas Production in a Plug Flow Anaerobic Digester

Co‐Digestion of Water Hyacinth and Duck Manure for Potential Low‐Cost Biogas Production by Rural Communities

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