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International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
ISSN: 1735-1472
EISSN: 1735-2630
Vol. 3, No. 2, 2006, pp. 159-166
Bioline Code: st06020
Full paper language: English
Document type: Research Article
Document available free of charge

International Journal of Environment Science and Technology, Vol. 3, No. 2, 2006, pp. 159-166

 en Microbiologically influenced corrosion in dairy effluent
B. Ramesh Babu, S. Maruthamuthu, A. Rajasekar, N. Muthukumar and N. Palaniswamy

Abstract

In the dairy industry mild steel is used as the construction material for the effluent treatment plants, pipelines, reinforcement in concrete structures etc. The steel exposed to the dairy effluent faces corrosion due to the microbes. In the present study the role of microbes in dairy effluent on the corrosion of mild steel has been investigated. Pseudomonas check for this species in other resources sp., Streptococcus check for this species in other resources sp., Micrococcus check for this species in other resources sp., Bacillus check for this species in other resources sp., Neisseria check for this species in other resources sp. and Lactobacillus check for this species in other resources sp. were identified in dairy effluent. Corrosion rate has been estimated by weight loss measurements and polarization technique. The Fourier transform infrared spectroscopy (FTIR) and X-ray diffractometer (XRD) studies were found helpful in investigating the chemical pathway leading to the formation of corrosion products on the mild steel during fermentation. Initiation of pitting corrosion was noticed on steel specimens by scanning electron microscope (SEM). A mechanism has been proposed for microbiologically influenced corrosion in dairy effluent.

Keywords
Dairy effluent, Lactobacilli spp., Pseudomonas sp, fermentation, iron sulphide, microbiological corrosion

 
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