This flocculant is prepared by incorporating at least one of Molokheiya its dried product or its extract so as to use acidic polysaccharides showing viscosity which are the main component of Molokheiya. The flocculant is prepared by for example processing flowers stems leaves roots or a part of them into a paste or pulverizing flowers stems leaves roots or a part of them in a dried state into a powder. The flocculant thus prepared is mixed with or used together with a flocculation assistant inorg. flocculant or polymer flocculant. The polymer flocculant is selected from ionic anionic cationic or amphoteric polymer flocculants.
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