... quality in line with GB15892-2009Appearance: white, golden yellow, tawny, reddish brown granule/FlakePAC use precautions, and dosage1, according to ... purification.C, urban wastewater treatment.D, useful substances in industrial waste water and solid waste recycling, promoting the ... be kept in indoor drying, ventilation, shade, and do not damp. How to use1, use should be made according to the quality ...