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Abstract

The paper presents results or laboratory tests or solid-phase anaerobic biorerncdiation or soil contaminated with chlorinated pesticides. It was shown that using methanogcnic granular sludge as inoculum and lactate as electron donor, it is possible to remove 80% or y-HCH, 94% 01· methoxychlor and 93% or DDT against control sample, with DDD accumulation much less than stoichiometric. Pesticides removal was practically completed alter 4-6 weeks of incubation at 22°C. Additional application of nonionic surfactant Tween 80 resulted in about one and a half-fold decrease or residual concentrations or some corn pounds. It also enhanced DDT conversion to some extent, decreasing DDD accumulation and intensifying production of D8P, the terminal metabolite or DDT anaerobic degradation pathway. Use of methanol as electron donor produced effects quite similar to these obtained with lactate, however with reduced results scatter.
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Authors and Affiliations

Tomasz Baczyński
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Abstract

The aim of this work was to determine the influence of native and alien keratinolytic fungi inocula on the petroleum hydrocarbon removal rate in soil covered and not covered with hair. The hair was the major nutrient for keratinolytic fungi and other soil microorganisms. The fungal inocula accelerated the petroleum hydrocarbon biodegradation process during the first month of the experiment. During the second month, TPH removal rates were similar for soil inoculated and not inoculated with fungi. The highest petroleum hydrocarbon removal rate was observed in soil inoculated with native fungal strains. The TPI-I removal rates were about 64% in soil covered with hair and 77% in soil not covered with hair. The lowest removal rate was observed in soil not inoculated with fungi (60%). The hair applied as additional nitrogen, sulfur and carbon source did not impact, or slightly inhibited, the petroleum hydrocarbon biodegradation process. The fungal inocula caused dramatic changes in soil fungal qualitative composition.
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Authors and Affiliations

Wioletta Przystaś
Krzysztof Ulfig
Korneliusz Miksch
Aleksandra Witała
Jerzy Szdzuj

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