Anaerobic co-digestion of food waste, human feces, and toilet paper: Methane potential and synergistic effect

The improper management of goat manure from concentrated goat feeding operations and food waste leads to the emission of greenhouse gasses and water pollution in the US. The wastes were collected from the International Goat Research Center and a dining facility at Prairie View A&M University. The biochemical methane potential of these two substrates in mono and co-digestion at varied proportions was determined in triplicates and processes were evaluated using two nonlinear regression models. The experiments were conducted at 36 ± 1 °C with an inoculum to substrate ratio of 2.0. The biomethane was measured by water displacement method (pH 10:30), absorbing carbon dioxide. The cumulative yields in goat manure and food waste mono-digestions were 169.7 and 206.0 mL/gVS, respectively. Among co-digestion, 60% goat manure achieved the highest biomethane yields of 380.5 mL/gVS. The biodegradabilities of 33.5 and 65.7% were observed in goat manure and food waste mono-digestions, while 97.4% were observed in the co-digestion having 60% goat manure. The modified Gompertz model is an excellent fit in simulating the anaerobic digestion of food waste and goat manure substrates. These findings provide useful insights into the co-digestion of these substrates.

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Methane potential of food waste from Engineering Faculty Cafeteria in Universitas Indonesia

2015 International Conference on Sustainable Energy Engineering and Application (ICSEEA) ◽

10.1109/icseea.2015.7380741 ◽

2015 ◽

Cited By ~ 1

Author(s):

Budiasti Wulansari ◽

Gabriel Andari Kristanto

Keyword(s):

Food Waste ◽

Engineering Faculty ◽

Methane Potential

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Biochemical Methane Potential of Spent Coffee Grounds Via Co-digestion with Food Waste

BioEnergy Research ◽

10.1007/s12155-021-10351-8 ◽

2021 ◽

Author(s):

Roberta Arlêu Teixeira ◽

Bárbara Almeida Bueno ◽

Raquel Machado Borges ◽

Jacqueline Rogéria Bringhenti

Keyword(s):

Food Waste ◽

Spent Coffee Grounds ◽

Biochemical Methane Potential ◽

Coffee Grounds ◽

Methane Potential

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Synergistic effect of anaerobic co-digestion of South African food waste with cow manure: Role of low density-polyethylene in process modulation

Materials Today Proceedings ◽

10.1016/j.matpr.2020.04.584 ◽

2020 ◽

Cited By ~ 1

Author(s):

Ayotunde Awosusi ◽

Vuiswa Sethunya ◽

Tonderayi Matambo

Keyword(s):

Synergistic Effect ◽

South African ◽

Food Waste ◽

Low Density Polyethylene ◽

Low Density ◽

Cow Manure

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Biochemical methane potential of livestock and agri-food waste streams in the Castilla y León Region (Spain)

Food Research International ◽

10.1016/j.foodres.2014.12.044 ◽

2015 ◽

Vol 73 ◽

pp. 226-233 ◽

Cited By ~ 15

Author(s):

Dolores Hidalgo ◽

Jesús M. Martín-Marroquín

Keyword(s):

Food Waste ◽

Waste Streams ◽

Biochemical Methane Potential ◽

Castilla Y Leon ◽

Methane Potential

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Solubilization of waste activated sludge by alkaline pretreatment and biochemical methane potential (BMP) tests for anaerobic co-digestion of municipal organic waste

Water Science & Technology ◽

10.2166/wst.2003.0471 ◽

2003 ◽

Vol 48 (8) ◽

pp. 211-219 ◽

Cited By ~ 56

Author(s):

N.-H. Heo ◽

S.-C. Park ◽

J.-S. Lee ◽

H. Kang

Keyword(s):

Activated Sludge ◽

Food Waste ◽

Organic Waste ◽

Waste Activated Sludge ◽

Feed Mixture ◽

Biochemical Methane Potential ◽

Methane Recovery ◽

Attractive Option ◽

Methane Potential ◽

Anaerobic Digestibility

Biochemical methane potential (BMP) tests have been carried out to determine the anaerobic digestibility of the waste activated sludge (WAS) and the sludge pretreated by NaOH (PWAS). The optimal NaOH dosage was determined to be 45 meq NaOH/L. The maximum SCOD solubilization was 27.7, 31.4 and 38.3% at the temperatures of 25, 35 and 55°C respectively after 4 hours reaction. The final methane yield of simulated food waste (SFW) was 430 ml CH4/g VSadded, and those of PWAS (25°C), PWAS (35°C) and PWAS (55°C) was 274, 286 and 310 ml CH4/g VSadded respectively after 20 days. The figures were 66%, 73% and 88% higher than that of WAS. The methane production in anaerobic co-digestion is considerably affected by the fraction of SFW and PWAS in the feed. The anaerobic digestibility of the feed mixture (SFW with PWAS) is higher than that of the feed mixture (SFW with WAS). Anaerobic co-digestion of food waste with the PWAS is found to be an attractive option to reduce the solid waste volume with improved methane recovery.

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