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Application of Moringa Oleifera Seed Extract to Treat Coffee Fermentation Wastewater

Garde, William K
http://orcid.org/0000-0002-4901-5313
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1471347356

Abstract Details

2016, MS, University of Cincinnati, Engineering and Applied Science: Environmental Engineering.
Wastewater generated from wet processing of coffee beans degrades stream water quality downstream of processing mills and impacts human health. The widespread popularity of coffee as an export makes this a global problem even though the immediate impact is local. Coffee is grown in 70 countries across the globe, and is worth about $100 billion annually—this is greater than the annual GDP of 2/3 of the 195 countries on the planet today. Approximately 40% of all coffee around the world is wet processed, producing wastewater rich in organic nutrients that can be hazardous to aquatic systems. Moringa Oleifera Seed Extract (MOSE) offers promise as a sustainable, local and affordable coagulation technology for aiding in the treatment of coffee wastewater. To date, its ability to reduce turbidity in coffee pulping wastewater has been established, but the reduction of total suspended solids (TSS), chemical oxygen demand (COD), nitrate, nitrite, and total nitrogen in coffee fermentation wastewater (CFW) has not been well characterized. As a result, field research was conducted at the Kauai Coffee Company in Hawaii to investigate the potential of MOSE as a viable treatment option for CFW. Coagulation tests were conducted in the field at five pH CFW levels (3, 4, 5, 6, and 7) and MOSE doses (0, 1, 2, 3, and 4 g/L) using pre-cleaned, 1-quart glass canning jars with metal lids. After settling, TSS, COD, nitrate, nitrite, total nitrogen, and pH of supernatant from each jar were measured. MOSE reduced TSS, COD, nitrate, and nitrite in CFW to varying degrees dependent on pH and dose applied. MOSE did not significantly alter the pH of CFW. TSS removal ranged from 8% to 54%. Insoluble COD removal ranged from 26% to 100% and total COD removal ranged from 1% to 25%. Although MOSE has a high organic content, only 25% is soluble and would be retained in the treated effluent. The ratio of soluble MOSE COD to potential CFW COD removal was shown to be approximately 0.04. Soluble COD is approximately 70% of the total COD in CFW and must be removed through treatment methods other than coagulation and settling. Nitrate and nitrite reduction ranged from 20% to 100%. Optimum removal efficiency for MOSE is between 2-3 g/L and maximum TSS, COD, nitrate, and nitrite removal was observed between pH levels 5-6. Total nitrogen increased with increasing MOSE dose due to dissolved organic nitrogen in MOSE solution. MOSE shows promise as sustainable, local, and affordable coagulant for treating CFW.
Margaret Kupferle, Ph.D. P.E. (Committee Chair)
Steven Buchberger, Ph.D. (Committee Member)
David Wendell, Ph.D. (Committee Member)
74 p.
Environmental Engineering
coffee; wastewater; moringa; coagulation; sustainability

Recommended Citations

Citations

  • Garde, W. K. (2016). Application of Moringa Oleifera Seed Extract to Treat Coffee Fermentation Wastewater [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1471347356

    APA Style (7th edition)

  • Garde, William. Application of Moringa Oleifera Seed Extract to Treat Coffee Fermentation Wastewater. 2016. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1471347356.

    MLA Style (8th edition)

  • Garde, William. "Application of Moringa Oleifera Seed Extract to Treat Coffee Fermentation Wastewater." Master's thesis, University of Cincinnati, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1471347356

    Chicago Manual of Style (17th edition)

ucin1471347356
1,765
© 2016, some rights reserved.Creative Commons License Application of Moringa Oleifera Seed Extract to Treat Coffee Fermentation Wastewater by William K Garde is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by University of Cincinnati and OhioLINK.