Abstract
The large number of wastewaters are generated because of the various production processes. Vegetable and fish processing can be considered an important industry for wastewater generation. The essential method for completing this waste is to digest the organic matter using anaerobic digestion followed by aerobic wastewater treatment processes; however, wastewater from tilapia culture pond retains considerable quantities of inorganic substances, particularly nutrients like nitrogen and phosphorus. The optimal conditions for cultivating Chlorella vulgaris from wastewater treatment effluent from tilapia culture pond were investigated in this study. The appropriate conditions were found to be 10% initial stock suspension, 20 cm depth, and 12 days of culture conditions. C. vulgaris had an optical density of 0.649, a cell density of 17.68 × 105 cells/mL, and biomass of 0.376 ± 94.21 mg/L after cultivation. Discharged wastewater from the fishpond was utilized for the improved growth of microalgae and obtained biomass was used for bioethanol production. This study verified that fishpond wastewater is the best source of nutrients for algal mass production and biofuel applications.
Highlights
Vegetable and fish processing can be considered an essential industry for wastewater generation throughout the country, wastewater significantly occurs as a pollutant from these production processes
This is an important reason for impurities and eutrophication when it contacts natural water resources (Tsai et al ; Ramaraj et al ; ); on the other hand, microalgae can be used for biofuel production and nutrient removal is a promising concept for integrated biomass generation and subsequent wastewater treatment
The microalgae were green in color, indicating that they belong to the Chlorophyta division
Summary
Vegetable and fish processing can be considered an essential industry for wastewater generation throughout the country, wastewater significantly occurs as a pollutant from these production processes. The most important alternative to complete this waste is to digest its organic matter using anaerobic digestion followed by aerobic wastewater treatment processes. Wastewater from this system still contains remaining inorganic substances at a relatively high amount, nutrients such as nitrogen and phosphorus (Bhuyar et al ). Wastewater rich in nitrogen is the best source for the cultivation of microalgae. This is an important reason for impurities and eutrophication when it contacts natural water resources (Tsai et al ; Ramaraj et al ; ); on the other hand, microalgae can be used for biofuel production and nutrient removal is a promising concept for integrated biomass generation and subsequent wastewater treatment. Academics, government agencies, and industrial companies are all interested in microalgae because of their potential to aid in removing nutrients while contributing to the production of valuable biomass (Tsai et al ; Wannapokin et al )
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