Related Experiment Videos
Microbiological degradation of a spent offset-printing developer
Tomas Vengris1, Rima Binkiene, Rita Butkiene
1Institute of Chemistry, Gostauto 9, 01108 Vilnius, Lithuania. tvengris@takas.lt
Journal of Hazardous Materials
|September 15, 2004
Summary
Microorganisms, including Geomyces pannorum and Bacteria spp., were used to decontaminate offset-printing developer. Septic Gobbler (SG) bacteria significantly reduced chemical oxygen demand and organic compounds, diminishing toxicity.
Area of Science:
- Environmental microbiology
- Bioremediation
- Chemical engineering
Background:
- Spent offset-printing developer poses environmental challenges due to its toxicity.
- Effective decontamination methods are crucial for managing industrial waste.
Purpose of the Study:
- To evaluate the efficacy of isolated microorganisms and commercial bacteria for decontaminating offset-printing developer.
- To assess the impact of biodegradation on the toxicity of the waste.
Main Methods:
- Isolation and identification of microorganisms (Geomyces pannorum, Bacteria spp.) from contaminated soil.
- Application of microbial cultures and commercial Septic Gobbler (SG) bacteria for waste treatment.
- Measurement of chemical oxygen demand (COD) and total identified organic compounds.
- Electrophysiological toxicity testing using Nitellopsis obtusa algae.
Main Results:
- G. pannorum and Bacteria spp. achieved 30% reduction in COD and organic compounds after 40 days.
- SG bacteria achieved approximately 80% COD reduction and 90% organic compound reduction in the same period.
- Toxicity remained high after treatment with G. pannorum and Bacteria spp., but was substantially reduced by SG bacteria.
Conclusions:
- Septic Gobbler (SG) bacteria demonstrate superior efficacy in decontaminating offset-printing developer compared to isolated native microorganisms.
- Bioremediation with effective microbial strains can significantly reduce the environmental toxicity of industrial waste.