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.