In order to achieve the purpose of sludge and straw resourceutilization

a new type of low cost adsorbent was prepared by high temperaturesintering with sludge and straw as raw materials

and it could adsorb dye wastewater. The bestpreparation conditions were screened by thermogravimetric analysis

mechanicalstrength measurement and electron microscopy analysis. Then

the adsorptionperformance of methylene blue dye was studied.Experimental results show thatwhen using the activator KOH

carbonized at 850℃

carbonization time was 1h

straw sludge feed ratio of 1∶4to optimal conditions.When the concentration of methylene blue solution is 20mg/L and the adsorptiontime is about 5 hours

the decolorization rate of methylene blue dye is thehighest

and the highest decolorization rate is more than 80%.Desorption experiments showed that the desorption rate of the granule adsorbentin the 0.05mol/LHCl solution was as high as 78.6%.