Purification of Waste Water with Effective Microorganisms and its Utilization in Agriculture

A. Okuda and T. Higa

University of the Ryukyus, Okinawa, Japan

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The potential of using Effective Microorganisms (EM) to purify waste water, including that of a sewage system, for recycling purposes was evaluated. The studies were extended to examine the potential of using treated sewage sludge as a fertilizer in crop production.
Long term application of EM reduced the adverse characteristics of waste water. The quality of the treated water was high, which indicated its potential use for reuse without health hazards. It also enhanced crop growth as measured by its effects on cucumber. Application of EM products to tap water also eliminated the ill effects generally found in chlorinated water. The treated city water was more effective in promoting plant growth.
Application of EM to sewage sludge enhanced its value as a fertilizer. Plant growth was enhanced in contrast to application of untreated sludge, which had toxic effects. The value of EM in sanitation programs and the potential of recycling wastes after treatment for nature farming at a low cost is presented on the basis of these studies.