Method for regulating stable pH value of sludge alkali

Abstract

The invention belongs to the field of treating and utilizing sludge, in particular relates to a method of regulating the stable pH value of sludge alkali. The method comprises the steps of feeding complex reagent into sludge dewatered primarily, stirring, mixing and reacting, wherein through taking the quantity of the treated sludge as a base number, the complex reagent comprises the following ingredients in percentage by weight: 5-8% of CaO, 0.5-2% of MgSO4, 0.5-2% of CaCl2, 0.5-1% of NaCl, and 0.1-0.5% of sulfamic acid. With the method, the sterilization capability is strong, the ash rate in the sludge is high, and the purification effect of heavy metal ions is good.

Description

technical field

[0001] The invention belongs to the field of sludge treatment and utilization, and in particular relates to an alkali-stabilized pH value adjustment method of sludge. Background technique

[0002] In recent years, with the rapid development of my country's economy and the enhancement of environmental protection awareness, a large number of new urban sewage treatment plants have been put into operation, but sludge treatment has become a new pollution problem. Therefore, while paying full attention to sewage treatment technology, whether the sludge problem can be solved well is also one of the decisive factors for the success of sewage purification. Therefore, it is necessary to strengthen the research on sludge treatment and utilization.

[0003] Sludge from sewage treatment plants is generally composed of loose materials with a high water content (95% to 99%), bulky, unstable properties, and extremely perishable, which is not conducive to transportation and d...