The technology of working with “Effective Microorganisms” was developed by Prof. Dr. Teruo Higa, a Japanese horticulturist, working at the University of the Ryukyus in the 1970s and 80s. While Dr. Higa was happy to have developed a mixture of microorganisms that boosted plant growth and plant health, already the earliest EM users reported additional benefits such as EM counteracting the fouling of biowaste and foul smells. Subsequently, the action of EM was explored in composting and in municipal waste management, in sewage and effluent treatment, in the hygiene management of toilets and urinals and of households in general, and in the rehabilitation of polluted soils and eutrophicated water bodies. EM has found use in all these fields and proven to be successful in many instances.
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