Improvement of methane production at alkaline and neutral pH from anaerobic co-digestion of microalgal biomass and cheese whey

2021 ◽  
pp. 107972
Author(s):  
Jack Rincón-Pérez ◽  
Lourdes B. Celis ◽  
Marcia Morales ◽  
Felipe Alatriste-Mondragón ◽  
Aida Tapia-Rodríguez ◽  
...  
Keyword(s):  
Methane Production ◽  
Cheese Whey ◽  
Microalgal Biomass ◽  
Neutral Ph

scholarly journals A Study on the Feasibility of Anaerobic Co-Digestion of Raw Cheese Whey with Coffee Pulp Residues

Energies ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3611
Author(s):  
Sandra Gonzalez-Piedra ◽  
Héctor Hernández-García ◽  
Juan M. Perez-Morales ◽  
Laura Acosta-Domínguez ◽  
Juan-Rodrigo Bastidas-Oyanedel ◽  
...  
Keyword(s):  
Methane Production ◽  
Kinetic Models ◽  
Cheese Whey ◽  
Maximum Yield ◽  
Gompertz Model ◽  
Coffee Pulp ◽  
The One ◽  
The Cost ◽  
Best Fit ◽  
Cheese Production

In this paper, a study on the feasibility of the treatment of raw cheese whey by anaerobic co-digestion using coffee pulp residues as a co-substrate is presented. It considers raw whey generated in artisanal cheese markers, which is generally not treated, thus causing environmental pollution problems. An experimental design was carried out evaluating the effect of pH and the substrate ratio on methane production at 35 °C (i.e., mesophilic conditions). The interaction of the parameters on the co-substrate degradation and the methane production was analyzed using a response surface analysis. Furthermore, two kinetic models were proposed (first order and modified Gompertz models) to determine the dynamic profiles of methane yield. The results show that co-digestion of the raw whey is favored at pH = 6, reaching a maximum yield of 71.54 mLCH4 gVSrem−1 (31.5% VS removed) for raw cheese whey and coffee pulp ratio of 1 gVSwhey gVSCoffe−1. The proposed kinetic models successfully fit the experimental methane production data, the Gompertz model being the one that showed the best fit. Then, the results show that anaerobic co-digestion can be used to reduce the environmental impact of raw whey. Likewise, the methane obtained can be integrated into the cheese production process, which could contribute to reducing the cost per energy consumption.

Continuous hydrogen and methane production in a two-stage cheese whey fermentation system

2011 ◽  
Vol 64 (2) ◽  
pp. 367-374 ◽  
Author(s):  
C. B. Cota-Navarro ◽  
J. Carrillo-Reyes ◽  
G. Davila-Vazquez ◽  
F. Alatriste-Mondragón ◽  
E. Razo-Flores
Keyword(s):  
Methane Production ◽  
Cheese Whey ◽  
Continuous Production ◽  
Uasb Reactor ◽  
Organic Loading Rate ◽  
Stable Operation ◽  
Operational Parameters ◽  
Two Stage ◽  
Production Of Hydrogen ◽  
Stage Process

The feasibility of integrating biological hydrogen and methane production in a two-stage process using mixed cultures and cheese whey powder (CWP) as substrate was studied. The effect of operational parameters such as hydraulic retention time (HRT) and organic loading rate (OLR) on the volumetric hydrogen (VHPR) and methane (VMPR) production rates was assessed. The highest VHPR was 28 L H2/L/d, obtained during stable operation in a CSTR at HRT and OLR of 6 h and 142 g lactose/L/d, respectively. Moreover, hydrogen (13 L/L/d) was produced even at HRT as low as 3.5 h and OLR of 163 g lactose/L/d, nonetheless, the reactor operation was not stable. Regarding methane production in an UASB reactor, the acidified effluent from the hydrogen-producing bioreactor was efficiently treated obtaining COD removals above 90% at OLR and HRT of 20 g COD/L/d and 6 h, respectively. The two-stage process for continuous production of hydrogen and methane recovered over 70% of the energy present in the substrate. This study demonstrated that hydrogen production can be efficiently coupled to methane production in a two-stage system and that CWP is an adequate substrate for energy production.

scholarly journals Hydrogen and Methane Production Under Conditions of Anaerobic Digestion of Key-Lime and Cabbage Wastes

2019 ◽  
Vol 39 (3) ◽  
pp. 243 ◽  
Author(s):  
Gaweł Sołowski ◽  
Izabela Konkol ◽  
Bartosz Hrycak ◽  
Dariusz Czylkowski
Keyword(s):  
Anaerobic Digestion ◽  
Hydrogen Production ◽  
Methane Production ◽  
Substrate Concentration ◽  
Suspended Solids ◽  
Batch Process ◽  
Citrus Aurantifolia ◽  
Total Solids ◽  
Neutral Ph ◽  
Key Lime

In this article, the results of key lime fruit (Citrus aurantifolia) wastes and cabbage (Brassica L.) wastes anaerobic digestion are presented. Anaerobic digestion of the wastes was performed in batch process, neutral pH (key-lime 7.47 and cabbage 7.67) and substrate concentration of Volatile Suspended Solids (VSS) 10 gVSS/L. One of the aims of this research was to check the availability of these substrates to be the source of methane and hydrogen. Key lime wastes produced 32 times more methane than raw cabbage. However, hydrogen production from cabbage was 149 times higher than key lime. The percentage of methane production in cabbage was up to 81% and in key lime was up to 75%. This research showed from the substrates comparison that efficient hydrogen production is less dependent on low pKa, pH than on total solids of the substrates.

Hydrogen and methane production from lipid-extracted microalgal biomass residues

2011 ◽  
Vol 36 (5) ◽  
pp. 3465-3470 ◽  
Author(s):  
Zhiman Yang ◽  
Rongbo Guo ◽  
Xiaohui Xu ◽  
Xiaolei Fan ◽  
Shengjun Luo
Keyword(s):  
Methane Production ◽  
Microalgal Biomass ◽  
Biomass Residues

Evaluation of thermal, ultrasonic and alkali pretreatments on mixed-microalgal biomass to enhance anaerobic methane production

2013 ◽  
Vol 143 ◽  
pp. 330-336 ◽  
Author(s):  
Sunja Cho ◽  
Seonghwan Park ◽  
Jiyun Seon ◽  
Jaechul Yu ◽  
Taeho Lee
Keyword(s):  
Methane Production ◽  
Microalgal Biomass

Methane production through anaerobic digestion of residual microalgal biomass after the extraction of valuable compounds

2020 ◽  
Author(s):  
Giorgos Markou ◽  
Bohdan Ilkiv ◽  
Mathieu Brulé ◽  
Dimitris Antonopoulos ◽  
Lambis Chakalis ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Methane Production ◽  
Microalgal Biomass ◽  
Valuable Compounds

scholarly journals Biogas from mono- and co-digestion of microalgal biomass grown on piggery wastewater

2018 ◽  
Vol 78 (1) ◽  
pp. 103-113 ◽  
Author(s):  
P. Carminati ◽  
D. Gusmini ◽  
A. Pizzera ◽  
A. Catenacci ◽  
K. Parati ◽  
...  
Keyword(s):  
Cheese Whey ◽  
Biogas Production ◽  
Degradation Kinetics ◽  
Synergistic Effects ◽  
Oxygen Demand ◽  
Carbonaceous Material ◽  
Methane Yield ◽  
Organic Loading Rate ◽  
Piggery Wastewater ◽  
Microalgal Biomass

Abstract Biogas production has been suggested as a valid valorization solution for microalgal/bacteria biomass (MAB) grown on wastewater. This research is aimed at assessing the feasibility to use MAB grown in an outdoor raceway fed on piggery wastewater for biogas production. Batch and continuous anaerobic tests were conducted on the sole MAB and on a blend of MAB and carbonaceous substrates (deproteinated cheese whey and cellulose) to improve the carbon/nitrogen ratio. Results of batch biochemical methane potential tests confirmed that the sole microalgal/bacteria biomass was poorly degradable (119 NmLCH4·gCOD−1), while blending it with deproteinated cheese whey or cellulose (80% of carbonaceous material and 20% of MAB, as chemical oxygen demand (COD)) had no synergistic effects on the methane yield, although slight improvements in the degradation kinetics were observed. Continuous anaerobic degradation tests (at an organic loading rate of 1.5 gCOD·L−1·d−1, 35 °C and 30 days of hydraulic retention time) increased the overall methane yield from 81 NmLCH4·gCOD−1 (sole MAB) to 216 NmLCH4·gCOD−1 (MAB and deproteinated cheese whey) and 122 NmLCH4·gCOD−1 (MAB and cheese whey). However, data confirm that no evident synergistic effects were obtained.

Effect of organic loading rate on anaerobic digestion of raw cheese whey: experimental evaluation and mathematical modeling

2020 ◽  
Vol 18 (7) ◽  
Author(s):  
Jazael G. Moguel-Castañeda ◽  
Michelle González-Salomón ◽  
Hector Hernández-García ◽  
Epifanio Morales-Zarate ◽  
Hector Puebla ◽  
...  
Keyword(s):  
Experimental Data ◽  
Mathematical Model ◽  
Anaerobic Digestion ◽  
Methane Production ◽  
Cheese Whey ◽  
Loading Rate ◽  
Waste Product ◽  
System Stability ◽  
Organic Loading Rate ◽  
Organic Loading

AbstractWhey is a high strength waste product of cheese manufacture. Anaerobic digestion of cheese allows pollution potential reduction and simultaneously energy production. Organic loading rate (OLR) is an important operating variable for anaerobic digestion (AD) process related to system stability, waste treatment capacity and biogas production. The actual OLR depends on the types of wastes (i.e., content of chemical oxygen demand [COD]) fed into a digester. In this paper, the effect of OLR on the AD process of the raw cheese whey in a semi-continuous up-flow system is studied experimentally and with numerical simulations using a simple dynamical model calibrated with experimental data. The digester operation was performed for 90 days, doubling the OLR every 30 days, from OLR of 2.5–10 gCOD L−1 d−1. Experimental results show that the increase in OLR favors the production of biogas. However, the proportion of methane may decrease. The highest methane yield and the most considerable substrate degradation were obtained at OLR of 5 gCOD L−1 d−1 and 10 gCOD L−1 d−1, respectively. The proposed mathematical model is used to describe the dynamic behavior of key variables as COD, volatile fatty acids (VFA) and methane production. A good fit between the variables estimated by the mathematical model and experimental data was obtained, reaching determination coefficients (R2) greater than 0.8. Therefore, this model might be beneficial in predicting the maximum methane production rate and the maximum OLR that could be used without risking the AD process stability.

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