Bioremediation of Sediments from Intensive Aquaculture Shrimp Farms by Using Calcium Peroxide As Slow Oxygen Release Agent

A viable treatment procedure was developed in this research with calcium peroxide (CaO 2 ) as a slow oxygen (O 2 ) release agent for bioremediation of polluted sediments from intensive shrimp farms containing high organic carbon, nitrogen and phosphorus. Experiments with sediment treatment by CaO 2...

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Bibliographic Details
Published in:Environmental technology 2005-05, Vol.26 (5), p.581-590
Main Authors: Hanh, D. N., Rajbhandari, B.K., Annachhatre, A.P.
Format: Article
Language:English
Subjects:
Animals
Applied sciences
Aquaculture
Biodegradation, Environmental
BIOREMEDIATION
Calcium - chemistry
Calcium - isolation & purification
CALCIUM PEROXIDE
Decontamination. Miscellaneous
Exact sciences and technology
Freshwater
Geologic Sediments - chemistry
INTENSIVE SHRIMP FARMING
Nitrogen - chemistry
Nitrogen - isolation & purification
Oxygen - chemistry
Penaeidae
Peroxides - chemistry
Phosphorus - chemistry
Phosphorus - isolation & purification
POLLUTED SEDIMENT
Pollution
SLOW OXYGEN RELEASE AGENT
Soil and sediments pollution
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Summary:A viable treatment procedure was developed in this research with calcium peroxide (CaO 2 ) as a slow oxygen (O 2 ) release agent for bioremediation of polluted sediments from intensive shrimp farms containing high organic carbon, nitrogen and phosphorus. Experiments with sediment treatment by CaO 2 were carried out with, as well as without, biomass seeding at pH ranging from 6.5 to 8.5. The sediment treatment applying CaO 2 without seeding yielded a BOD 5 , organic-C and organicN removal up to 95%, 17.6% and 75%, respectively compared to the removal of 66%, 8.6% and 57%, respectively in the controlled treatment without CaO 2 addition. The investigations were also carried out with CaO 2 dosage with biomass seeding at different food-to-microorganisms (F/M) ratio between 0.1 and 0.25. The BOD 5 , organic-C and organic-N removal up to 92%, 17.6% and 73%, were achieved for a F/M ratio 0.1. The experimental results indicated complete organic-P removal within 5-7 days of treatment without seeding and within the initial 2 days of treatment with seeding. The present research revealed that, the application of CaO 2 could enhance the degradation of organic-C, organic-N and organic-P during the treatment of polluted sediment.
ISSN:0959-3330
1479-487X
DOI:10.1080/09593332608618543