Cultivation of Arthrospira platensis using discharge water from Thai shrimp farm for algal production and wastewater treatment
2018
Phengrit, K. | Iamtham S.
The productivity of Arthrospira platensis culture is valuable due to its nutritive properties. This study to increase the productivity of algae and also reduce production costs during large-scale cultivation for industrial purposes. The experiments were conducted using wastewater taken from a shrimp farm at Kamphaengsaen, Nakhon Pathom province, Thailand, from August 2015 to April 2016. Algal culture from 100% wastewater with 60% NaHCO3 produced the highest cell count (18x10⁴ cells/ml.) To produce a culture medium suitable for algal growth, non-diluted wastewater supplemented with 60% NaHCO3, NaNO3, and K₂HPO₄ under fluorescent light for 16 h/day had the highest yield (29x10 sup 4 cells/ml). In terms of wastewater quality, the Biochemical Oxygen Demand5 (BOD5) value, as well as nitrogen, phosphorus, zinc, lead, and copper content were reduced after cultivating A. platensis in wastewater from a shrimp farm for 30 days. Therefore, adding A. platensis to the shrimp farm wastewater was very useful in keeping low N and P content and in improving water quality suitable for shrimp larvae. Nutrients from wastewater in a shrimp farm can be used for growing this algal species, while simultaneously treating the wastewater before discharging directly into waterways.
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