Universal Journal of Agricultural Research Vol. 10(6), pp. 731 - 748
DOI: 10.13189/ujar.2022.100613
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Evaluation of the Concentration of Phytotoxic Chemicals and Microbial Load of the Vermicompost Prepared from Coffee Processing Waste


Lalitha Soumya 1,*, Kurian Raphael Poovathingal 2, G. Prakash Williams 3, Naveen Chandra D. 4, Soonu Vadakke Kunnummal 5
1 Department of Biotechnology and Microbiology, Dr. Janaki Ammal Campus, Kannur University, Palayad, Thalassery, Kerala, India. Pin-670661
2 Head-Research & Development, TATA Coffee Limited, Pollibetta, Karnataka, India. Pin-571215
3 Botany and Biotechnology, Bishop Moore College, Mavelikara, Alapuzha, Kerala, India. Pin- 690110
4 Department of Biosciences, Mangalore University, Mangalagangotri Campus, Mangalore, Karnataka, India. Pin-574199
5 Department of Biotechnology and Microbiology, Kannur University, Dr. Janaki Ammal Campus, Palayad, Thalassery, Kerala, India. Pin-670661

ABSTRACT

Coorg, a district in the Indian state of Karnataka, is well known for producing and exporting coffee and is also known as the "Coffee Land of India". Industries that process coffee produce enormous amounts of waste, including coffee husk and pulp. The disposal of this waste is a significant problem. The simplest method of waste disposal is tossing it into landfills, resulting in serious eco-toxicological issues such as the leaching of phytotoxic chemicals such as caffeine, tannins, and polyphenols. Additionally, the microbial load of the plant growth-promoting microorganisms in the contaminated soil gets diminished due to these toxic substances. The current study aimed to determine the feasibility of reducing the phytotoxic chemicals in the soil contaminated with coffee processing waste by generating compost and vermicompost. This study analyzed three treatments of soil: first treatment comprised soil polluted with coffee processing waste; in the second treatment the soil polluted with coffee processing waste was treated with cow dung, weeds and chopped banana leaves, native soil in the ratio 6;2;1;1 and the natural compost was generated. Treatment 3 was prepared by keeping treatment 2 for 15 days for pretreatment and it was inoculated with adult earthworm Eudrilus eugiensis and vermicompost was prepared. All treatments were kept for 90 days. The concentration of phytotoxic compounds such as caffeine, chlorogenic acid, and tannins in three treatments was examined, every 15 days over the course of 90 days. Triplicates of the measurements were done and the average values were taken for conclusions. It was found that the concentration of caffeine, chlorogenic acid, and tannins dramatically decreased from 1.25, 0.66, and 0.35 mg/gm to 0.05, 0.0523, and 0.02 mg/gm respectively after vermicomposting. Also, the treatment was found to have a gradual increase in the microbial load of plant growth-promoting microorganisms, including Pseudomonas, nitrogen-fixing microorganisms, phosphate-solubilizing microorganisms, starch hydrolyzing microorganisms, pectinolytic and chitinolytic microorganisms. Thus, the research proved that composting and vermicomposting are the best options for recycling coffee processing waste.

KEYWORDS
Coffee Processing Waste, Phytotoxic Chemicals, Microbial Load, Microorganisms, Compost, Vermicompost, Cow Dung, Eudrilus eugiensis

Cite This Paper in IEEE or APA Citation Styles
(a). IEEE Format:
[1] Lalitha Soumya , Kurian Raphael Poovathingal , G. Prakash Williams , Naveen Chandra D. , Soonu Vadakke Kunnummal , "Evaluation of the Concentration of Phytotoxic Chemicals and Microbial Load of the Vermicompost Prepared from Coffee Processing Waste," Universal Journal of Agricultural Research, Vol. 10, No. 6, pp. 731 - 748, 2022. DOI: 10.13189/ujar.2022.100613.

(b). APA Format:
Lalitha Soumya , Kurian Raphael Poovathingal , G. Prakash Williams , Naveen Chandra D. , Soonu Vadakke Kunnummal (2022). Evaluation of the Concentration of Phytotoxic Chemicals and Microbial Load of the Vermicompost Prepared from Coffee Processing Waste. Universal Journal of Agricultural Research, 10(6), 731 - 748. DOI: 10.13189/ujar.2022.100613.