EFFECT OF PHYSICOCHEMICAL PROPERTIES AND ATTACHMENT SURFACES ON BIOFILMS IN CASSAVA MILL EFFLUENT POLLUTED OLOSHI RIVER, NIGERIA

Autores

  • Victor Oluoha Nwaugo 1 Dept of Microbiology, Abia State University, Uturu - Nigeria,
  • Reginald Azuonye Onyeagba
  • Solomon Nnanna Umeham
  • Nelson Azu

DOI:

https://doi.org/10.7213/reb.v29i66.22211

Palavras-chave:

Biofilm, Attachment surfaces, Mill effluent

Resumo

The effects of physicochemical properties and attachment surface characteristics on biofilm formed in a cassava mill effluent of the polluted Oloshi River (Nigeria) was investigated. Concerning to physicochemical properties, the Total Dissolved Solids (TDS), Total Suspended Solids (TSS), and Dissolved Oxygen (DO) were significantly affected with higher values in the discharge point (DP) than in the downstream points (DS). Values for these properties in samples from upstream (US) sites were lower than in the DP, except for DO that was higher. Klebsiella spp., Corynebacterium spp., Moraxella spp., Acinetobacter spp., and Saccharomyces spp. were absent in the US, but were found from the DP though the DS. Regarding to the bioloads, DS I has presented the highest bacterial counts, followed by the DS II, while the lower counts were obtained in US. Again, in a general form, higher biofilm contents have been observed in DS I, followed by DS II, and lower in US. In all sampling sites, wood surfaces had the highest biofilm bacterial counts followed by the plastic surfaces before the glass and metallic surfaces. In that order, higher biofilm bacterial counts then water column counts were observed. The obtained results let us to infer that the availability of nutrients and the nature of attachment surfaces directly influence in the biofilm formation in such analyzed ecosystems.

Downloads

Não há dados estatísticos.

Downloads

Publicado

2007-11-24

Como Citar

Nwaugo, V. O., Onyeagba, R. A., Umeham, S. N., & Azu, N. (2007). EFFECT OF PHYSICOCHEMICAL PROPERTIES AND ATTACHMENT SURFACES ON BIOFILMS IN CASSAVA MILL EFFLUENT POLLUTED OLOSHI RIVER, NIGERIA. Estudos De Biologia, 29(66). https://doi.org/10.7213/reb.v29i66.22211

Edição

Seção

Fluxo Contínuo