Abstract
The current study is on the the use of macro-algae as feedstock for biogas production. Three types of macro-algae, Cladophora glomerata (CG), Chara fragilis (CF), and Spirogyra neglecta (SN), were chosen for this research. The experimental studies on biogas production were carried out with these algae in a batch bioreactor. In the bioreactor was maintained 35 ± 1°C temperature. The results showed that the most appropriate macro-algae for biogas production are Spirogyra neglecta (SN) and Cladophora glomerata (CG). The average amount of biogas obtained from the processing of SN – 0.23 m3/m3d, CG – 0.20 m3/m3d, and CF – 0.12 m3/m3d. Considering the concentration of methane obtained during the processing of SN and CG, which after eight days and until the end of the experiment exceeded 60%, it can be claimed that biogas produced using these algae is valuable. When processing CF, the concentration of methane reached the level of 50% only by the final day of the experiment, which indicates that this alga is less suitable for biogas production.
Highlights
Algae are beneficial to the production of oxygen, but their rapid spread to minus
Three experimental 15-days studies with macro-algae were conducted at 35 ± 1°C
The amount of biogas decreased to 0.039 m3/ m3d at the end of the experiment
Summary
Algae are beneficial to the production of oxygen, but their rapid spread to minus. The spread of algae in water bodies is an important environmental problem, which results in disappearance of the water bodies. They can live alone or in colonies. Depending on the type of algae, usually a half of its nutritional value is protein, less than a third carbohydrates, and the remaining compounds are fats, vitamins and trace elements. Factors influencing more like algal production are: High water temperature (depends on solar radiation, topography, currents, water sources); Nutrients (depend on the ecosystem, sediments, and the shoreline); Water pH; Low oxygen levels; Anthropogenic pollution;
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