Characterization of Biotic and Abiotic Profiles of Greenhouse Evaporative Cooling System Fouling
Purpose: To characterize the microorganisms influencing greenhouse evaporative cooling system fouling as a prelude to designing a sustainable remediation scheme that would assist in reducing the heavy financial loss incurred by stakeholders due to deterioration of cooling pads. Methods: Samples of biofilms on evaporative cooling system pads were collected from various locations in Saudi Arabia and fixed with 5% formaldehyde. Light microscopy, scanning electron microscopy (SEM) and QWIN software were employed for the identification of different morphometric parameters of the constituent microbes. pH and conductivity were assessed using Pasport PS-2102 and PS-2116 sensors, respectively. Results: Different genera of cyanobacteria and diatom including Phormidium, Oscillatoria, Lyngbya, Navicula, Melosira and Gomphonema were identified and characterized, in addition to various types of bacteria and white crust fungus, Phanerochaete crysosporium. Total dissolved solids (TDS) values of 2641 ppm (conductivity, 5282 µS/cm) for Al-Rasheed, 2327.5 ppm (conductivity, 4655 µS/cm) for Sara, 3352 ppm (conductivity, 6704 µS/cm) for Dammam Municipality Greenhouse (DMG) and 61.5 ppm (conductivity, 123 µS/cm; pH 6.88) for KFUPM were obtained at 25◦C. Conclusion: Various organisms, including cyanobacteria and diatoms, which have been implicated in the biofilms of evaporative cooling systems at different locations in Saudi Arabia, were characterized with the aid of morphometric parameters. Identifying the constituent microorganisms would aid in designing a sustainable remediation scheme that is expected to reduce the heavy financial cost incurred by stakeholders due to frequent replacement of evaporative cooling pads during routine maintenance.
Keywords: Cyanobacteria, Diatoms, Biofilms, Morphometric, Evaporative cooling
Tropical Journal of Pharmaceutical Research Vol. 7 (3) 2008: pp. 1043-1049
Submission of a manuscript to this journal is a representation that the manuscript has not been published previously and is not under consideration for publication elsewhere.
All authors named in each manuscript would be required to sign a form (to be supplied by the Editor) so that they may retain their copyright in the article but to assign to us (the Publishers) and its licensees in perpetuity, in all forms, formats and media (whether known or created in the future) to (i) publish, reproduce, distribute, display and store the contribution, (ii) translate the contribution into other languages, create adaptations, reprints, include within collections and create summaries, extracts and/or abstracts of the contribution, (iii) create any other derivative works(s) based on the contribution, (iv) to exploit all subsidiary rights in the contribution, (v) the inclusion of electronic links from the contribution to third party material where-ever it may be located, and (vi) license any thrid party to do any or all of the above.