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The utilization of wastewater from fermented rice noodle factories in Prong Madua Community, Amphoe Mueang, Nakhon Pathom for Spirulina sp.
This experimental research aimed to investigate an appropriate utilization of rice noodle processing wastewater for Spirulina sp. cultivation and encourage the utilization of wastewater from rice noodle factories in Prong Madua Community. The research methods were 1) study the contexts of community and in the wisdom group of rice noodle innovative production in Prong Madua Community, Amphoe Mueang, Nakhon Pathom; 2) analyze wastewater quality and study wastewater quality suitable for Spirulina sp. cultivation in a laboratory; and 3) cultivate Spirulina sp. outdoor in wastewater from rice noodle factories in Prong Madua Community. The research period was from October 2013 to August 2014. According to the research result, it was found that 1) Khun Boonruen’s rice noodle factory was the biggest factory in Prong Madua Community and in the wisdom group of rice noodle innovative production. In this factory, there were about 20 employees in the factory; they were labors from the community. This factory produced fermented and non-fermented rice noodle for wholesaling at Klong Toei market. The production rate was approximately 3-4 tons per day with 800- 1,000 liters of wastewater in average. 2) As for the analysis of wastewater quality, processing wastewater quality was at the standard level with COD between 17,000 - 17,600 mg/L. When cultivating Spirulina sp. in wastewater medium diluted with distillated water at the dilution rate of 1:20 (volume by volume), Spirulina sp. could grow best at 1.8x107 cell/ml. 3) Regarding the outdoor cultivation of Spirulina sp., the level of COD was decreased at 87% from 638 to 81.33 mg/L. The results can be concluded that rice noodle processing wastewater has potential for cultivating Spirulina sp. and it would be the guideline for utilizing community waste for developing the potentiality and economy of the community.
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