Isolation and screening of potential actinobacteria for rapid composting of rice straw

Rice straw is produced as a by-product from rice cultivation, which is composed largely of lignocellulosic materials amenable to general biodegradation. Lignocellulolytic actinobacteria can be used as a potential agent for rapid composting of bulky rice straw. Twenty-five actinobacteria isolates wer...

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Bibliographic Details
Published in:Biodegradation (Dordrecht) 2011-04, Vol.22 (2), p.367-375
Main Authors: Kausar, H., Sariah, M., Mohd Saud, H., Zahangir Alam, M., Razi Ismail, M.
Format: Article
Language:English
Subjects:
Actinobacteria
Actinobacteria - metabolism
Adaptability
Aquatic Pollution
Bacteria
Biodegradation
Biodegradation of pollutants
Biodegradation, Environmental
Biological and medical sciences
Biomedical and Life Sciences
Biotechnology
Cellulases - metabolism
Cellulose
Composting
Cultivars
Cultivation
Environment and pollution
Enzymes
Fundamental and applied biological sciences. Psychology
Geochemistry
Grain cultivation
Industrial applications and implications. Economical aspects
Life Sciences
Lignin
Microbiology
Micromonospora - metabolism
Original Paper
Oryza - chemistry
Plant Stems - chemistry
Rice
Rice straw
Soil
Soil Science & Conservation
Terrestrial Pollution
Waste Management/Waste Technology
Waste Water Technology
Water Management
Water Pollution Control
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Summary:Rice straw is produced as a by-product from rice cultivation, which is composed largely of lignocellulosic materials amenable to general biodegradation. Lignocellulolytic actinobacteria can be used as a potential agent for rapid composting of bulky rice straw. Twenty-five actinobacteria isolates were isolated from various in situ and in vitro rice straw compost sources. Isolates A2, A4, A7, A9 and A24 were selected through enzymatic degradation of starch, cellulose and lignin followed by the screening for their adaptability on rice straw powder amended media. The best adapted isolate (A7) was identified as Micromonospora carbonacea. It was able to degrade cellulose, hemicelluloses and carbon significantly ( P  ≤ 0.05) over the control. C/N ratio was reduced to 18.1 from an initial value of 29.3 in 6 weeks of composting thus having the potential to be used in large scale composting of rice straw.
ISSN:0923-9820
1572-9729
DOI:10.1007/s10532-010-9407-3