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Full Length Research Paper
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Economic importance and
application options of some industrial sludge conditioned by
different treatment methods
Asia, Imohimi O.1*, Ekpo, K. E.2
and Chukwuedo, M. E.1
1Department
of Chemistry, Ambrose Alli University, P. M. B.14, Ekpoma,
Nigeria.
2Department
of Biochemistry, Ambrose Alli University, P. M. B.14, Ekpoma,
Nigeria.
*Corresponding author. E-mail:
imoasia2000@yahoo.com.
Accepted
16 May, 2008 |
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Abstract |
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Industrial sludge was obtained from four industries:
aluminium extrusion, brewery, pharmaceutical and textile
processing factory and treated by aerobic, anaerobic,
physicochemical, combined aerobic/physicochemical and
combined anaerobic/ physicochemical methods. The results
showed that the final destination of the sludge would
determine the type and degree of treatment required for the
sludge. Physicochemical method generally increases the
quantity of sludge solids, thus making the sludge suitable
for land reclamation; also, the firmer and denser floc
characteristics of the physicochemically treated sludge
makes the methods a better alternative if conditioned sludge
are to be used to reinforce cement for brick making.
Biological treatment methods (aerobic and anaerobic) can be
used to reduce the quantity of sludge before disposal.
Solids destruction is closely related to biogas production.
If using sludge as a source of fuel is the focus, the
anaerobic biological system may be the best option. Aerobic
biological method and the combined aerobic/physicochemical
methods are good options for ammonia reduction. Anaerobic
biological method is best for improving the nitrogen content
and hence the protein content of sludge so as to use the
waste sludge as feeds for poultry birds and livestock.
Economic values, application and disposal options of the
various sludge are discussed.
Key
words:
Industrial sludge, treatment, economic importance, reuse,
application, disposal. |
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