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Biosorption of Baftkar textile effluent.
Mahnaz Mazaheri Assadi1, Maryam Mazaheri, Taher Nejad Satari
1Biotechnology Center, Iranian Research Organization for Science and Technology, No.71, Forsat St. Enghelab ave, Tehran, Iran. mxmazaheriassadi@yahoo.com
Indian Journal of Experimental Biology
|July 14, 2004
Summary
Marine Aspergillus niger effectively decolorizes textile wastewater using sucrose as an energy source. Optimal conditions include specific nutrient levels and inoculum concentration for efficient color removal.
Area of Science:
- Environmental microbiology
- Bioremediation
- Industrial biotechnology
Background:
- Textile industry wastewater poses significant environmental challenges due to persistent colorants.
- Marine fungi offer a promising avenue for developing novel bioremediation strategies.
- Aspergillus niger, a marine isolate, was investigated for its potential in decolorizing industrial effluents.
Purpose of the Study:
- To evaluate the efficacy of a marine Aspergillus niger strain in decolorizing textile plant wastewater.
- To optimize decolourization conditions, including energy sources, nitrogen source, inoculum concentration, and temperature.
- To assess the performance of treated fungal biomass in a continuous column reactor.
Main Methods:
- Isolation and identification of marine Aspergillus niger from Gorgan Bay.
- Kinetics study of decolourization by varying carbon/energy sources (sucrose) and nitrogen sources (NH4+).
- Optimization of inoculum concentration (0.04-1.0 g/L) and temperature (30°C).
- Evaluation of decolourization in a continuous column reactor using pre-treated mycelium (NaOH, 90°C).
Main Results:
- Sucrose was identified as the optimal carbon and energy source for decolourization.
- NH4+ ion proved to be the most effective nitrogen source.
- Color reduction increased from 80% to 97% with increasing inoculum concentration from 0.04 g/L to 1.0 g/L, with a minimum of 0.2 g/L required.
- Optimal growth temperature for Aspergillus niger was determined to be 30°C.
- 90-96% color reduction was achieved within 19-20 hours of contact time.
- A continuous column reactor with treated mycelium achieved 70% color reduction in 1 hour.
Conclusions:
- Marine Aspergillus niger is a highly effective agent for textile wastewater decolourization.
- Optimized conditions significantly enhance the efficiency and speed of the bioremediation process.
- The use of treated fungal biomass in a continuous system demonstrates potential for industrial application.