With the gradual increase in algal waste, its disposal has become a key problem in the field of marine environmental protection. Anaerobic digestion (AD) of algal biomass is one potential method for its treatment in a beneficial manner. However, AD of algae is hindered because of strong resilient cell walls, and hence, pretreatment of algae biomass before AD is an essential process. In this study, green algae (Enteromorpha) were used as the research substrate to explore the damage and impact of NaOH–urea pretreatment on biomass. Scanning electron microscopy and thermogravimetric analysis were used to analyze the damage of the cell wall structure of Enteromorpha via NaOH–urea pretreatment. The response surface method (RSM) was used for the optimization of pretreatment conditions to obtain the best experimental conditions. The experimental independent variables were pretreatment time, pretreatment temperature, and NaOH–urea concentration. RSM results showed that the optimal conditions are pretreatment time of 50 min, NaOH–urea concentration of 5.89%, and pretreatment temperature of −16 °C. AD was carried out under these conditions. The results showed that cumulative gas production for the control group was 231.5 ml whereas the biogas yield for best optimal conditions was 521.5 and 413 ml, respectively. In addition, AD reaction kinetics was evaluated by two mathematical kinetic models. It was found that modified Gompertz model is more suitable for describing the AD behavior.
Skip Nav Destination
Article navigation
Research Article|
June 29 2021
NaOH–urea pretreatment for biogas enhancement from algal biomass anaerobic digestion
RuiZhe Feng;
RuiZhe Feng
1
College of Power and Energy Engineering, Harbin Engineering University
, Harbin 150001, People's Republic of China
Search for other works by this author on:
Asad A. Zaidi;
Asad A. Zaidi
1
College of Power and Energy Engineering, Harbin Engineering University
, Harbin 150001, People's Republic of China
2
Department of Engineering Sciences, PN Engineering College, National University of Sciences and Technology
, Karachi 75350, Pakistan
Search for other works by this author on:
QiaoYan Li;
QiaoYan Li
3
School of Geography and Environment, Liaocheng University
, Liaocheng 252000, People's Republic of China
Search for other works by this author on:
Kun Zhang;
Kun Zhang
1
College of Power and Energy Engineering, Harbin Engineering University
, Harbin 150001, People's Republic of China
Search for other works by this author on:
Yue Shi
Yue Shi
a)
1
College of Power and Energy Engineering, Harbin Engineering University
, Harbin 150001, People's Republic of China
a)Author to whom correspondence should be addressed: shiyue@hrbeu.edu.cn. Tel.: +86-185-4581-2660. Fax: +86-451-82519305
Search for other works by this author on:
a)Author to whom correspondence should be addressed: shiyue@hrbeu.edu.cn. Tel.: +86-185-4581-2660. Fax: +86-451-82519305
J. Renewable Sustainable Energy 13, 033102 (2021)
Article history
Received:
February 22 2021
Accepted:
May 24 2021
Citation
RuiZhe Feng, Asad A. Zaidi, QiaoYan Li, Kun Zhang, Yue Shi; NaOH–urea pretreatment for biogas enhancement from algal biomass anaerobic digestion. J. Renewable Sustainable Energy 1 May 2021; 13 (3): 033102. https://doi.org/10.1063/5.0048341
Download citation file:
Pay-Per-View Access
$40.00
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Citing articles via
Modification of wind turbine wakes by large-scale, convective atmospheric boundary layer structures
Lawrence Cheung, Gopal Yalla, et al.
Simulation and modeling of wind farms in baroclinic atmospheric boundary layers
J. H. Kasper, A. Stieren, et al.
Machine learning for modern power distribution systems: Progress and perspectives
Marija Marković, Matthew Bossart, et al.
Related Content
Study on the co-pyrolysis behaviors of sewage sludge and Enteromorpha prolifera and the adsorption mechanism of Cr(VI) in water using pyrolysis residue
J. Renewable Sustainable Energy (June 2023)
Study of pyrolytic mechanisms of seaweed based on different components (soluble polysaccharides, proteins, and ash)
J. Renewable Sustainable Energy (March 2017)
Impact of algal biodiesel and its diesel blends on performance and emission characteristics of compression ignition engine
J. Renewable Sustainable Energy (January 2022)
A two-stage culture process using Chlorella vulgaris for urban wastewater nutrient removal and enhanced algal lipid accumulation under photoautotrophic and mixotrophic conditions
J. Renewable Sustainable Energy (June 2016)
Application of recycled media and algae-based anaerobic digestate in Scenedesmus cultivation
J. Renewable Sustainable Energy (February 2016)