造粒流化床浓缩技术处理给水厂排泥水的中试研究

以南方某给水厂排泥水为处理对象,利用造粒流化床污泥浓缩工艺进行了处理规模为 1-2．5 m3／h的中试研究。研究结果表明,对于排泥水有机物、藻类含量高的南方水厂而言,采用一 体化造粒流化床浓缩工艺进行处理是切实可行的,且具有处理效率高、出泥含水率低、脱水性能好、 出水浊度低等特点;中试条件下,流化床水流上升速度可达38-50 cm／min,最佳搅拌转速为 5 r／min,PAM药耗比普通重力浓缩-调质工艺节省25％-40％,污泥含水率可从99％降至95％- 97％。并通过试验确定了相关工艺参数。

Pilotplant research on application of fluidized bed pelleting thickening for waterworks sludge treatment at south China

Fluidized bed pelleting thickening (FBPT) facility with capacity of 1 to 2. 5 m /h was applied to concentrate the waterworks waste sludge in south China. The experimental result indicated that FBPT is a feasible and practical integral unity for treatment of waterworks sludge, which was characterized by high organic matter and algae content. It was proved that FBPT process has superiority of high treatment efficiency, the concentrated sludge is low moisture and easy to dewatering, and the supernatant is low turbidity. The working parameters of pilot-experiment are: water flow rate in FBPT reactor 38 to 50 cm/min, optimal rotating rate 5 r/min, and the ployacrylamide (PAM) consumption was saved 25% to 40% compared with the conventional gravitational thickening process, and the moisture content of the sludge was reduced from about 99 % to 95 % - 97 % . The optimal parameters of FBPT process were also investigated at the pilot-experiment.