Improving methane production and anaerobic digestion stability of food waste by extracting lipids and mixing it with sewage sludge

Algapani, Dalal E.; Wang, Jing; Qiao, Wei; Su, Min; Goglio, Andrea; Wandera, Simon M.; Jiang, Mengmeng; Pan, Xiaoyong; Adani, Fabrizio; Dong, Renjie

doi:10.1016/j.biortech.2017.08.087

Cited by 37 publications

(8 citation statements)

References 29 publications

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“…Table 2 represents the kinetic parameters of modified Gompertz model , it was found that, the maximum rate of methane production ( M P ) for co‐digestion was higher (18.60 L/Kg VS fed /day) compared to the mono digestion of DW (15.59 L/Kg VS fed /day) and WH (16.28 L/Kg VS fed /day). Similarly, Algapani et al (2017) investigated the anaerobic co‐digestion of lipid removed food waste with sewage sludge and proposed the modified Gompertz model where the lag phase duration, methane production rate was predicted with an accuracy of R 2 ‐0.99 which was almost similar to this present study. Thus, the characteristic sigmoidal curve pattern observed in this present study was similar to previous studies (Akshaya & Jacob, 2018; Lo et al, 2010; Samuel et al, 2017).…”

Section: Resultssupporting

confidence: 85%

Sequential valorization strategies for dairy wastewater and water hyacinth to produce fuel and fertilizer

Arutselvy

Rajeswari

Jacob

2020

J Food Process Engineering

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To overcome the obstacles of treatment of dairy wastewater (DW) under anaerobic mono‐digestion and sustainable disposal of harvested water hyacinth (WH) a novel sequential valorization strategy was adopted to obtain fuel and fertilizer. Initially, DW and WH were subjected for anaerobic co‐digestion to elucidate the synergistic effect of the substrates to improve the process efficiency and increased biomethane production. The results indicated that the co‐digestion mixture (DW: WH‐1:1) has resulted in biomethane yield of 504.38 L/Kg VSfed which is 1.28‐fold and 3.14‐fold higher as compared to the mono‐digestion of WH (431.71 L/Kg VSfed) and DW (160.59 L/Kg VSfed), respectively. Further, the residual digestate was subjected for slow pyrolysis (320 ± 15°C) to obtain bio‐oil and biochar. The obtained bio‐oil shown superior fuel characteristics as compared to direct WH bio‐oil resulting in density, viscosity, and calorific value of 1.21 ± 0.04 g/ml, 1.8 ± 0.05 cSt and 1766.82 ± 11.53 KJ/Kg, respectively. The biochar residue from pyrolysis was amended to the soil to determine its bio‐fertilizing property. The soil properties in terms of bulk density, porosity, organic carbon, and pH were enhanced. Tomato cultivation in biochar amended soil shown comparable vegetative growth to that of digestate and urea thereby advocating the replacement of chemical fertilizers. Practical Application With recent increase in environmental concerns and requirement to meet the prescribed limits for effluent discharge from the industries, especially from food processing for the protection of aquatic bodies, there is a requirement of adoption of cost effective technology that could provide both economic and ecological sustainability. In this study, a sequential valorization strategy was adopted for efficient management of dairy wastewater and harvested water hyacinth from the water resources. The resultant products biogas, bio‐oil and biochar could be potentially used as fuel and fertilizer. Circular bio‐economy is in need of time which could be attainable by the implementation of such strategies in large scale industries for efficient waste management and resource recovery. This will not only benefit the environment but also to the society by galvanizing the sustainable development technology.

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Section: Resultssupporting

confidence: 85%

Sequential valorization strategies for dairy wastewater and water hyacinth to produce fuel and fertilizer

Arutselvy

Rajeswari

Jacob

2020

J Food Process Engineering

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“…Indeed, in a work of 2016, Prabhu and Muturi found methane increases in biogas of 60% and 73% with the addition of SS to FW; while in 2015 Koch and colleagues found accelerated methane production rates [164,165]. Moreover, AcoD of FW with SS is beneficial to process stability, particularly in thermophilic conditions [138]. Anaerobic co-digestion of FW with SS appeared to be an advantageous way of managing sewage sludge, especially in China [166] and in South Korea [30] where such matters raise a lot of concern.…”

Section: Anaerobic Co-digestion Of Food Waste With Different Substratesmentioning

confidence: 99%

“…Algapani and colleagues in 2017 [138]. Biological co-treatment (biological solubility pre-treatment) could improve the hydrolysis performance of FW and SS, since alkalis generated by sludge can buffer VFAs and maintain optimum pH for hydrolysis [181].…”

Section: Anaerobic Co-digestion Of Food Waste With Different Substratesmentioning

confidence: 99%

Anaerobic digestion of food waste for bio-energy production in China and Southeast Asia: A review

Negri

Ricci

Zilio

et al. 2020

Renewable and Sustainable Energy Reviews

Self Cite

160

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“…Lipid, as seen, favours the long fatty acids production which can inhibit hydrogen and methane production. The extracted lipid have been introduced to a secondary anaerobic bioreactor fed by sewage sludge, where the acids production does not represent an possible inhibiting factor, as sewage sludge organic content is lower than HFWs (Algapani et al, 2017).…”

Section: Recent and Innovative Strategies For Biohythane Productionmentioning

confidence: 99%

Recent developments in biohythane production from household food wastes: A review

Bolzonella

Battısta

Cavınato

et al. 2018

Bioresource Technology

142

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Improving methane production and anaerobic digestion stability of food waste by extracting lipids and mixing it with sewage sludge

Cited by 37 publications

References 29 publications

Sequential valorization strategies for dairy wastewater and water hyacinth to produce fuel and fertilizer

Sequential valorization strategies for dairy wastewater and water hyacinth to produce fuel and fertilizer

Anaerobic digestion of food waste for bio-energy production in China and Southeast Asia: A review

Recent developments in biohythane production from household food wastes: A review

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