Abstract
Effects of the untreated olive mill wastewater (UOMW) and the bioaugmented olive mill wastewater (BOMW) with the fungus Phanerochaete chrysosporium (P. chrysosporium ) for the amendment of soil were investigated. Results showed that UOMW inhibited the soil respirometric activity, while BOMW exhibited significantly higher respiration levels compared to the unamended and the UOMW amended soils. The ratio of C-CO 2/C tot decreased from 6.7 in the unamended soil to 6.34, to 2.74 and to 1.6 in soils amended consecutively with 50, 100 and 200 m 3 ha -1 of UOMW. Based on the first results, the UOMW dose of 50 m 3 ha -1 showed the elevated C-CO 2/C tot ratio in comparison with the two other doses (100 and 200 m 3 ha -1 ) so that it was chosen to test the effects of its bioaugmentation with P. chrysosporium on the soil biodegradation activities. The fungus P. chrysosporium was added at three different forms; spores suspension (10 6 spores g -1 ), mycelium form (cultivated in liquid medium) and colony form (mycelium fragments from solid medium).The soil amended with 50 m 3 ha -1 of BOMW showed higher CCO 2/C tot ratio in comparison with control soil (unamended) and with soil amended with 50 m 3 ha -1 of
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