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用高梯度磁分离技术处理给水，通常在投加Ｆｅ３Ｏ４铁粉及混凝剂时可以去除水中的细菌。细菌总数和大肠杆菌的去除率均可达到９９％．通过试验证明，未经处理的松花江水和深井水直接通过高梯度磁滤器，不投加Ｆｅ３Ｏ４铁粉和混凝剂，可以去除水中的细菌和大肠杆菌，去除率在９０％以上．
Feedwater is treated with a high-gradient magnetic separation technique, which usually removes bacteria from the water when Fe3O4 iron powder and coagulant are added. The total number of bacteria and E. coli removal rate can reach 99%. Through experiments, the untreated Songhua River water and deep well water directly pass through the high-gradient magnetic filter without adding Fe3O4 iron powder and coagulant, which can remove bacteria and E. coli in the water, and the removal rate is above 90%.