Ozone Oxidation of Anaerobic Digested Piggery Wastewater MBR Treated Effluent for Decline of Organic Matters and Chromaticity to Remove Nitrogen with Microalgae Cultivation
- Ozone Oxidation of Anaerobic Digested Piggery Wastewater MBR Treated Effluent for Decline of Organic Matters and Chromaticity to Remove Nitrogen with Microalgae Cultivation
- 최욱진; 채아나; 김한수; 송경근
- Piggery wastewater treatment; ozone oxidation; microalgae; chromaticity
- Issue Date
- IWA-ASPIRE 2013
- Anaerobic digested piggery wastewater has high concentration of pollutant such as suspended
solids, organic matters, nitrogen, phosphorous and etc. In the point of view on nitrogen removal, traditional biological nitrogen removal processes are sequential nitrification followed by
denitrification. These processes have disadvantages against energy consuming in nitrification
process, furthermore keeping anoxic condition in the denitrification process.
Microalgae are autotrophic microorganisms consuming carbon, nitrogen and phosphorous in
photosynthesis and metabolisms. Microalgae directly uptake nitrogen and then synthesis protein for grow and propagation. Hence microalgae can be applied to the end of treatment system
moreover produced biomass can be utilized as biofuels, natural dyes and animal feed. Microalgae cultivation with MBR effluent of anaerobic digested piggery wastewater has economic
competitiveness by decreasing production cost, compared with commercial medium using for
The critical problem of microalgae cultivation with the MBR effluent having high levels of
chromaticity is light blocking against microalgae photosynthesis. The inactivity of photosynthesis affect to nitrogen removal efficiency as decrease microalgae cell viability, so the chromaticity
should be declined to optimal condition.
In this study, the ozone oxidation method used to remove chromaticity. The ozone gas was
generated by LAB2B ozone generator (Ozoniakorea, Korea) with pure oxygen (above 99.9%). The contact reactor (60mm inner diameter and 430mm height) made with acryl. The oxidation reaction temperature was 15ºC and reaction periods were 0, 5, 10, 15 and 20minute. Microalga strain Scenedesmus quadricauda (KCTC AG 10032) was used for the study. The strain was obtained from the Biological Resources Center (BRC) of the Korea Research Institute of Bioscience and Biotechnology (KRIBB).
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