Enhancement of biogas production from individually or co-digested green algae Cheatomorpha linum using ultrasound and ozonation treated biochar

Ahmed El Nemr; Mohamed Aly Hassaan; Marwa Ramadan Elkatory; Safaa Ragab; Mohamed Ahmed El-Nemr; Luigi Tedone; Guisepe De Mastro; Antonio Pantaleo

doi:10.1016/j.ultsonch.2022.106197

Enhancement of biogas production from individually or co-digested green algae Cheatomorpha linum using ultrasound and ozonation treated biochar

Ultrason Sonochem. 2022 Nov:90:106197. doi: 10.1016/j.ultsonch.2022.106197. Epub 2022 Oct 11.

Authors

Ahmed El Nemr¹, Mohamed Aly Hassaan², Marwa Ramadan Elkatory³, Safaa Ragab⁴, Mohamed Ahmed El-Nemr⁵, Luigi Tedone⁶, Guisepe De Mastro⁷, Antonio Pantaleo⁸

Affiliations

¹ National Institute of Oceanography and Fisheries (NIOF), Marine Pollution Department, Environment Division, Alexandria 21556, Egypt. Electronic address: ahmedmoustafaelnemr@yahoo.com.
² National Institute of Oceanography and Fisheries (NIOF), Marine Pollution Department, Environment Division, Alexandria 21556, Egypt. Electronic address: mhss95@mail.com.
³ Advanced Technology and New Materials Research Institute, City for Scientific Research and Technological Applications, Alexandria 21934, Egypt.
⁴ National Institute of Oceanography and Fisheries (NIOF), Marine Pollution Department, Environment Division, Alexandria 21556, Egypt.
⁵ Department of Chemical Engineering, Faculty of Engineering, Minia University, Minia 61519, Egypt.
⁶ Bari University, Department of Agriculture and Environmental Sciences, Bari 70121, Italy. Electronic address: luigi.tedone@uniba.it.
⁷ Bari University, Department of Agriculture and Environmental Sciences, Bari 70121, Italy. Electronic address: giuseppe.demastro@uniba.it.
⁸ Bari University, Department of Agriculture and Environmental Sciences, Bari 70121, Italy. Electronic address: antonio.pantaleo@uniba.it.

Abstract

This paper proposes the use of modified biochar, derived from Sawdust (SD) biomass using sonication (SSDB) and Ozonation (OSDB) processes, as an additive for biogas production from green algae Cheatomorpha linum (C. linum) either individually or co-digested with natural diet for rotifer culture (S. parkel). Brunauer-Emmett-Teller (BET), Fourier-Transform Infrared (FTIR), thermal-gravimetric (TGA), and X-ray diffraction (XRD) analyses were used to characterize the generated biochar. Ultrasound (US) specific energy, dose, intensity and dissolved ozone (O₃) concentration were also calculated. FTIR analyses proved the capability of US and ozonation treatment of biochar to enhance the biogas production process. The kinetic model proposed fits successfully with the data of the experimental work and the modified Gompertz models that had the maximum R² value of 0.993 for 150 mg/L of OSDB. The results of this work confirmed the significant impact of US and ozonation processes on the use of biochar as an additive in biogas production. The highest biogas outputs 1059 mL/g VS and 1054 mL/g VS) were achieved when 50 mg of SSDB and 150 mg of OSDB were added to C. linum co-digested with S. parkle.

Keywords: Anaerobic digestion; Biogas; Macroalgae; Ozonation; Sawdust Biochar; Sonication.

MeSH terms

Anaerobiosis
Biofuels
Charcoal
Chlorophyta*
Flax*
Ozone*

Substances

biochar
Biofuels
Charcoal
Ozone