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nature : yellow or yellow powder. Crude protein content is over 85%, chromium residue 0.006%, moisture <5%. Feed additives used for high quality protein feed. Quality also can be used as fertilizer. Tannery to the chromium-contaminated leather scraps and water to wash away the salt and other insoluble impurities, high temperature hydrolysis, pressure filtration to remove chromium hydroxide residue, vacuum evaporation, vacuum drying, after smashing in.
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