ORIGINAL RESEARCH
Anaerobic Co-Digestion of Cattle Manure
and Raw Algae: Kinetic Study and Optimization
of Methane Potential by RSM
| 1 | Civil and Environmental Engineering Department, German Jordanian University, Amman 11180 Jordan |
| 2 | Engineer, Environmental and Renewable Energy Engineering, German Jordanian University, Amman 11180 Jordan |
| 3 | Department of Chemical Engineering, Al-Huson University College, Al-Balqa Applied University, Irbid, Jordan |
CORRESPONDING AUTHOR
Arwa Abdelhay
Civil and Environmental Engineering, German Jordanian University, Amman Madaba Street P.O. Box 35247 Amman 11180 Jo, 11180, Amman, Jordan
Civil and Environmental Engineering, German Jordanian University, Amman Madaba Street P.O. Box 35247 Amman 11180 Jo, 11180, Amman, Jordan
Submission date: 2020-05-10
Final revision date: 2020-07-14
Acceptance date: 2020-07-18
Online publication date: 2020-11-20
Publication date: 2021-01-20
Pol. J. Environ. Stud. 2021;30(2):1029–1037
KEYWORDS
TOPICS
ABSTRACT
This paper investigated anaerobic co-digestion of cattle manure and raw algae with and without
adding activated sludge as co- substrate and under different substrate ratios. The results showed that
the co-digestion of cattle manure with raw algae led to a maximum methane yield of 294 mL/g VS at
a CM:A ratio of 70%:30%. While co-digestion of cattle manure and raw algae diluted with tap water
under CM:A ratio of (70%:30%) resulted in a methane yield of 97 mL/g VS. In the co-digestion runs
conducted with the same feedstock and inoculated with activated sludge, little methane was produced.
The values of pH and (N-NH3) showed no inhibitory effect. The kinetic study revealed that the
maximum methane yield was 32.4 (mL/g VS.d), 332 (mL methane/g VS) respectively. The lag time
ranged from 0 to 3 days. The Response surface methodology showed that methane production could be
represented by a second-order polynomial.
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