Application of Moringa Oleifera Seed Extract to Treat Coffee Fermentation Wastewater
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University of Cincinnati / OhioLINK
2016
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ndltd-OhioLink-oai-etd.ohiolink.edu-ucin14713473562021-08-03T06:38:16Z Application of Moringa Oleifera Seed Extract to Treat Coffee Fermentation Wastewater Garde, William K. Environmental Engineering coffee wastewater moringa coagulation sustainability 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. 2016-10-20 English text University of Cincinnati / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=ucin1471347356 http://rave.ohiolink.edu/etdc/view?acc_num=ucin1471347356 unrestricted This thesis or dissertation is protected by copyright: some rights reserved. It is licensed for use under a Creative Commons license. Specific terms and permissions are available from this document's record in the OhioLINK ETD Center. |
| collection |
NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
Environmental Engineering coffee wastewater moringa coagulation sustainability |
| spellingShingle |
Environmental Engineering coffee wastewater moringa coagulation sustainability Garde, William K. Application of Moringa Oleifera Seed Extract to Treat Coffee Fermentation Wastewater |
| author |
Garde, William K. |
| author_facet |
Garde, William K. |
| author_sort |
Garde, William K. |
| title |
Application of Moringa Oleifera Seed Extract to Treat Coffee Fermentation Wastewater |
| title_short |
Application of Moringa Oleifera Seed Extract to Treat Coffee Fermentation Wastewater |
| title_full |
Application of Moringa Oleifera Seed Extract to Treat Coffee Fermentation Wastewater |
| title_fullStr |
Application of Moringa Oleifera Seed Extract to Treat Coffee Fermentation Wastewater |
| title_full_unstemmed |
Application of Moringa Oleifera Seed Extract to Treat Coffee Fermentation Wastewater |
| title_sort |
application of moringa oleifera seed extract to treat coffee fermentation wastewater |
| publisher |
University of Cincinnati / OhioLINK |
| publishDate |
2016 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1471347356 |
| work_keys_str_mv |
AT gardewilliamk applicationofmoringaoleiferaseedextracttotreatcoffeefermentationwastewater |
| _version_ |
1719440728530092032 |