Selective Flocculation for Coal De Mineralization

Sludge (de)flocculation Dynamics in Secondary Clarifiers

During the biological treatment of wastewater the waste is biodegraded by micro-organisms. This is one of the principal goals. A probably even more crucial unit process is the clarification. Indeed, clarifying the “purified” water is necessary to remove the particulate fraction in which the micro-organisms reside. According to Wanner (1994) the washout of sludge contributes to 50 to 80% of the ...

Ultrasonic Coal-Wash for De-Ashing and De-Sulfurization - ReadingSample

Selective Flocculation of Banded Hematite Quartzite (BHQ) Ores

The recovery of fine hematite particles from banded hematite quartzite (BHQ) ore with potato starch has been investigated using selective flocculation. Microscopic features, coupled with x-ray diffraction (XRD), and Fourier transforms infrared (FTIR) spectroscopic data provide evidences for adsorption of starch molecules on hematite surface. The starch molecules show good selectivity for hemati...

Online Flocculation Analyzer for Coagulant Control

Treatment plants are faced with the challenge of stricter regulations and higher standards for finished water quality. New developments in control strategies and instrument design have overcome some of the previous limitations of monitoring and controlling the coagulation process. An online floc analyzer provides valuable information on the dynamics of particle aggregation subsequent to coagula...

Fluid shear influences on flocculation Fluid shear influences on flocculation

The tube flocculator is used to study how fluid shear levels affect the settling properties of a flocculated alum-kaolin suspension. FReTA is employed to quantitatively compare the effects of varying fluid shear and hydraulic residence time on the sedimentation velocity distributions and the post-sedimentation residual turbidities of flocculated suspensions formed in the tube flocculator. Resul...

Rationally designed mineralization for selective recovery of the rare earth elements

The increasing demand for rare earth (RE) elements in advanced materials for permanent magnets, rechargeable batteries, catalysts and lamp phosphors necessitates environmentally friendly approaches for their recovery and separation. Here, we propose a mineralization concept for direct extraction of RE ions with Lamp (lanthanide ion mineralization peptide). In aqueous solution containing various...