DefinePK

Abstract

The charging flocculation agent is produced from volcanic ash by calcining it in the special firing furnace to generate high porosity, then applying a strong electric charge to some substances included in the ingredient of the ash by special processing. The agent consists of the natural inorganic substances, therefore, it is considered as an ecological water depurative. The agent has rapid rate of flocculation and sedimentation, therefore, the facility cost is cheaper, post-processing sludge is simplified, operation cost is low, and efficiency is high. Apart from effective treatment of the waters contaminated with high content of turbidity and color, the agent can remove some heavy metals such as Fe, Mn and some organic substances (COD), therefore, it have been used for water supply treatment. The results of application of the flocculation agent in Ha Tinh and Vinh Long provinces on small- and medium water supply facilities with capacity of 50 litters and 500 liters per a hour shows that the quality of the treated waters met the QCVN 02:2009/BYT. When using the flocculation agent and the disinfectant agent, the quality of treated waters can meet all 109 parameters regulated in QCVN 01:2009/BYT.