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Using cassava waste of the cassava starch processing as food for raising African Nightcrawler (Eudrilus eugeniae) to obtain vermicomposting and earthworm biomass

Ha, Thi Quyen and Le, Thi Minh Thanh (2020) Using cassava waste of the cassava starch processing as food for raising African Nightcrawler (Eudrilus eugeniae) to obtain vermicomposting and earthworm biomass. Journal of Vietnammese Environment, 12 (2). pp. 169-176. ISSN 2193-6471

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Abstract

The raising earthworms by cassava waste is a useful solution to reduce environmental pollution caused by cassava starch processing. In this study, cassava waste (including cassava peel, cassava pieces and soil) was used as a food source for raising African Nightcrawler (Eudrilus eugeniae) with experiments as follows: Experiment 1: earthworms were raised in crushed cassava waste right after being discharged; Experiment 2: earthworms raised in crushed cassava waste that had been incubated with organic matter decomposing microbiological preparation for the previous two weeks; Experiment 3: earthworms were raised in crushed cassava waste that had self-decomposed naturally for the previous two weeks. The cassava waste was decomposed naturally for 4 weeks for the control. Besides, the crushed cassava waste was also incubated by organic matter decomposing microbiological preparation for 4 weeks for getting more data for comparison between experiments (Experiments 4). The experiments were followed for 4 weeks. The results showed that the content of organic matter, humic acid and total nitrogen in organic cassava humus obtaining from experiments increased comparing to the control: total organic matter content reached from 10.4%-15.7%, higher than the control (8.2%) from 1.27-1.92 times, humic acid content reached 0.6 - 0.8% and total nitrogen reached 0.3%. In which, the experiment 3 had the highest quality of humus (organic matter content 15.7%, total nitrogen 0.3%, humic acid 0.7% and fulvic acid 0.5%). The experiment 3 also had the highest earthworm biomass (3.6kg), increasing 30.5% comparing to experiment 1 and 19.4% comparing to experiment 2. Therefore, experiment 3 was proposed for application in treatment of cassava waste in larger scale. The organic humus obtaining from raising earthworms by cassava waste can be used as raw materials for producing vermicompost. The earthworm biomass can be used as protein rich food for domestic animals (such as chicken, tortoise, eel, fish...) or used as nutritious fertilizer.

Item Type: Article
Subjects: Engineering Physics
Divisions: Faculty of Agriculture Technology (FAT)
Depositing User: Hà Th� Quyến
Date Deposited: 04 Dec 2020 08:30
Last Modified: 04 Dec 2020 08:30
URI: http://eprints.uet.vnu.edu.vn/eprints/id/eprint/4127

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