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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Article
Study on Using Biological Sludge from Vinh Loc Industrial Park to Produce Composting Product
Author(s)
Ton That Lang1, Nguyen Thi Mai Thao1, Pham Vu Nhat Uyen1 and Dang Anh Tuan2
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DOI:10.17265/2162-5298/2018.05.002
Affiliation(s)
1. Environmental Department, University of Natural Resources and Environment, Ho Chi Minh City 00848, Vietnam
2. Microbiology Department, University of Technology, Ho Chi Minh City 00848, Vietnam
ABSTRACT
In order to examine the optimal design and operating parameters in
composting of waste activated sludge, a series of experiments were conducted to discuss
the optimal operating parameters for aerobic composting of waste activated
sludge obtained from Vinh Loc Industrial Park that is located in Ho Chi Minh City. The study was done
by optimizing the ratios of sludge/inactive fillers and sludge/microbial
products to improve the composting efficiency. After 50 days of composting, the
composts of all experiment
batches met the microorganism-organic fertilizer standards of 10 TCN 526:2002.
The study indicated that the highest efficiency decomposition was obtained at the
ratio of a sludge/inactive fillers of 1/0.1 and sludge/microbial products of 1/0.05: TOC (Total Organic Carbon) reduced by 20.2%, loss of Nitrogen was trivial
(0.53%), the highest temperature reached at 55.5 oC and lasting for 5 days which ensures elimination of pathogens. However,
the addition of nitrogen compounds during the composting is necessary to ensure
the compost product can meet the nitrogen standard of microorganism-organic
fertilizer.
KEYWORDS
Biological sludge, microorganism-organic fertilizer, aerobic composting, reuse of sludge, inactive fillers.
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