Bioremediasi untuk Menurunkan Kadar Insektisida Klordan di Lahan Sawah

Abstract

Bioremediation is one of the effective ways to remediate pesticide-contaminated land, in order to reduce environmental pollution problems. Bacillus substillis, Heliothrix oregonensis, Catenococcus thiocycli,and Achoromobacter sp are soil microbes which are capable of lowering the levels of chlordanein the fields. These microbes derived from preliminary research results indigenous soil insulation in the Laboratory of Microbiology LIPI Cibinong. This research is aimed to determine the decrease levels of chlordane in paddy fields cultivated with rice Ciherang variety using bioremediation treatment. The soil used for the planting medium is taken from Cilamaya village, District CilamayaWetan, Karawang. This research is conducted at Jakenan Research Station from January to December 2013. This research uses activated carbon coated urea and biochar enriched by indigenous microbes with a dose 250 kg/ha. This research is designed by using complete randomized block design which is repeated three times with for 40 ml microbial concorcia populations 109 in 1 kg of urea coated by biochar or activated carbon. The microplot size 1 x 1 m with spacing of 20 x 20 cm. Insecticide residue analyzes carried out in Balingtan Laboratory in Bogor by gas chromatography, using the SNI 06-6991.1-2004method. The result shows biochar coconutshell-coated urea enriched with microbes in rice farming can reduce pesticide residues chlordane amountedto 27.10