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Phosphorus Removal of Tofu Processing Wastewater in Recirculated Raceway Pond Bioreactor by Chlorella vulgaris


Affiliations
1 Department of Agricultural Engineering, Brawijaya University, Jalan Veteran 1, Malang, East Java 65145, Indonesia
2 Department of Agricultural Engineering, Brawijaya University, Jalan Veteran 1, Malang, East Java 65145, India
3 Department of Aquaculture, Brawijaya University, Jalan Veteran 1, Malang, East Java 65145, Indonesia
 

The objective of this research is to observe the phosphorus elimination from tofu industrial wastewater. Chlorella vulgaris as autotrophic microalgae was applied in raceway pond type bioreactor. The reactor volume was 120L, 17m of path length with 10 days of hydraulic retention time. The light source is mainly from the sun during the day without specifically any light added at night. The observed parameters in this study were BOD, phosphorus and ammonium removal, and microalgae growth with its initial density set to be 5,00,000 cells per mL of wastewater. A higher growth rate of microalgae was shown during the batch treatment than the continuous one. The average achievement for the phosphorus, ammonium and BOD removal were 58.6%, 84% and 83 % respectively.

Keywords

Tofu Wastewater, Bioreactor, Phosphorus Removal, Chlorella vulgaris.
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  • Phosphorus Removal of Tofu Processing Wastewater in Recirculated Raceway Pond Bioreactor by Chlorella vulgaris

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Authors

Wahyunto A. Nugroho
Department of Agricultural Engineering, Brawijaya University, Jalan Veteran 1, Malang, East Java 65145, Indonesia
M. Bagus Hermanto
Department of Agricultural Engineering, Brawijaya University, Jalan Veteran 1, Malang, East Java 65145, Indonesia
Mustofa Lutfi
Department of Agricultural Engineering, Brawijaya University, Jalan Veteran 1, Malang, East Java 65145, India
Muhammad Fakhri
Department of Aquaculture, Brawijaya University, Jalan Veteran 1, Malang, East Java 65145, Indonesia

Abstract


The objective of this research is to observe the phosphorus elimination from tofu industrial wastewater. Chlorella vulgaris as autotrophic microalgae was applied in raceway pond type bioreactor. The reactor volume was 120L, 17m of path length with 10 days of hydraulic retention time. The light source is mainly from the sun during the day without specifically any light added at night. The observed parameters in this study were BOD, phosphorus and ammonium removal, and microalgae growth with its initial density set to be 5,00,000 cells per mL of wastewater. A higher growth rate of microalgae was shown during the batch treatment than the continuous one. The average achievement for the phosphorus, ammonium and BOD removal were 58.6%, 84% and 83 % respectively.

Keywords


Tofu Wastewater, Bioreactor, Phosphorus Removal, Chlorella vulgaris.