To provide a water purifying and activating method for purifying and improving the water quality caused by phenomenon that the abnormality of pH occurs in a closed water area with an excess of unstable nitrogen component, increase in the amount of phosphorus, non-transparency of water by eutrophication, and the growth of a malodor sludge, and to provide a construction method therefor.

A water activating material is constituted so that the pH adjustment, deodorization or sterilization of water is performed by wood vinegar, flocculation and sedimentation is performed using diatomaceous soil, the aeration, ion exchange and membrane treatment of sludge is performed by zeolite and water or soil is purified only using a natural material. The water activating material is composed of wood vinegar, zeolite, vegetable broken pieces and microorganisms. The water activating material is scattered over the closed water area to perform pH adjustment, flocculation and sedimentation, aeration, ion exchange, chlorine removal, oxidative catalytic reaction, the decomposition of a malodorous substance by oxidative reaction, the decomposition of putrefaction odor of protein, excrement of an animal, etc., adsorptive decomposition of nitrogen, phosphoric acid, etc. the adsorption of a harmful substance such as outflow oil or the like, the adsorption and decomposition of residual agricultural chemicals or heavy metals and the development of microbial action due to the repairing of a living environment of effective microorganisms due to antibacterial action and pH adjustment.

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