Solid state anaerobic digestion of water poor feedstock for methane yield: an overview of process characteristics and challenges

2021 ◽  
Author(s):  
Kunwar Paritosh ◽  
Vinod Kumar ◽  
Nidhi Pareek ◽  
Dinabandhu Sahoo ◽  
Yadira Bajon Fernandez ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Solid State ◽  
Methane Yield ◽  
Process Characteristics

scholarly journals Biofuel Produced from Solid-State Anaerobic Digestion of Dairy Cattle Manure in Coordination with Black Soldier Fly Larvae Decomposition

Energies ◽  
2019 ◽  
Vol 12 (5) ◽  
pp. 911 ◽  
Author(s):  
Choon Wee ◽  
Jung-Jeng Su
Keyword(s):  
Anaerobic Digestion ◽  
Solid State ◽  
Dairy Cattle ◽  
Cattle Manure ◽  
Methane Yield ◽  
Black Soldier Fly ◽  
Combination Process ◽  
Black Soldier Fly Larvae ◽  
Fly Larvae ◽  
Biological Treatment Process

This study was conducted to evaluate the feasibility of applying a two-step biological treatment process, solid-state anaerobic digestion (SSAD) and black soldier fly larvae (BSFL) composting, for the treatment of dairy cattle manure. Biogas from the SSAD of dairy cattle manure, and the digestate of SSAD was fed to BSFL. In turn, BSFL can be fed to animals as a protein supplement. Adjustment of the pH and 30% inoculation ratio (IR30) during SSAD produced the highest theoretical methane yield, 626.1 ± 28.7 L CH4/kg VSdes, with an ultimate methane yield of 96.81 ± 2.0 L CH4/kg VSload. For BSFL composting, the groups with a feeding rate of 75 and 100 mg/day/larvae had the highest body weight change, which was 969.6 ± 28.4% and 984.1 ± 177.6%, respectively. The combination process of SSAD and BSFL composting increases the incentive for dairy cattle manure treatment instead of conventional composting and produced more valuable products.

Study on Solid-State Anaerobic Co-Digestion with Distiller’s Grains and Food Waste for Methane Production

2012 ◽  
Vol 485 ◽  
pp. 306-309
Author(s):  
Li Hong Wang ◽  
Qun Hui Wang ◽  
Wei Wei Cai
Keyword(s):  
Anaerobic Digestion ◽  
Solid State ◽  
Synergistic Effect ◽  
Food Waste ◽  
Methane Production ◽  
Waste Treatment ◽  
Biogas Production ◽  
Methane Yield ◽  
Kitchen Waste ◽  
Distiller's Grains

Solid-state anaerobic digestion (SSAD) of distiller’s grains (DG) and kitchen waste (KW) for biogas was investigated. Six DG to KW ratios of 10/1, 8/1, 6/1, 4/1, 1/0, and 0/1 was used. The results showed that in 48 digestion days the co-digestion with DG to KW ratio of 8:1 obtained the highest methane yield of 159.74mL/gTS, TS and VS reductions of 58.7% and 71.8%, hemicellulase, cellulose and lignin reductions of 46.7%, 45.4% and 4.0%. Compared to mono-digestions of DG or KW, co-digestion of DG and FW had a good synergistic effect. It indicated that SSAD of cellulosic-based waste and food waste could be one of the options for efficient biogas production and waste treatment

Enhancing Hydrolysis and Syntropy Simultaneously in Solid State Anaerobic Digestion: A GRA – Taguchi Based Study and Techno-Economic Assessment for Austainable Bioeconomy

2020 ◽  
Author(s):  
Kunwar Paritosh ◽  
Sanjay Mathur ◽  
Nidhi Pareek ◽  
Vivekanand Vivekanand
Keyword(s):  
Anaerobic Digestion ◽  
Solid State ◽  
Pearl Millet ◽  
Economic Assessment ◽  
Methane Yield ◽  
Rate Of Return ◽  
Hydrolysis Rate ◽  
Internal Rate Of Return ◽  
Internal Rate ◽  
Payback Time

Abstract Background: Solid-state anaerobic digestion of agricultural stubble is attractive technology for energy and bioeconomy as well as it may lead to transitioning towards greenhouse gas neutrality; yet hydrolysis and syntropy affects the process and makes it economically nonviable. In this regard, present study investigates the effect of alkali and biochar addition for simultaneous increment of hydrolysis and syntropy for higher methane yield from pearl millet straw. Further, taguchi based design of experiment was coupled with grey relation analysis for multiple output evaluation and detailed techno-economic assessment was performed. Results: Study showed that 0.5 g/100g pearl millet straw of alkali and 10 g/L of biochar was the optimised dosing along with 20% total solid concentration and 4 as feedstock/inoculum ratio. Statistically, contribution of biochar and alkali was 48 and 21% respectively on the multiple output. The confirmation test revealed that hydrolysis rate constant, k for reactor having optimised conditions was 0.0521 d-1 while for control, it was 0.0595 d-1. Cumulative methane yield was also increased by 1.8-fold for optimised condition. Techno-economic assessment showed that capital cost and electrical efficiency of combined heat and power unit have dominant effect on the investment. Solid state anaerobic digestion of pearl millet straw with alkali and biochar showed US$ 25652 of net present value and showed to have payback time of 8.2 years with 11% of internal rate of return.Conclusion: The simultaneous increment of hydrolysis rate and syntrophic activity in optimized condition helped to achieve higher methane yield. Techno-economic assessment showed that shorter payback time and higher internal rate of return, making large scale project profitable and viable which may endorse sustainable bioeconomy with lower greenhouse gases.

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