Separation of Oxidized Pyrrhotite from Fine Fraction Serpentine

Separation of Ultra - Fine Sulphur Particles from Nta Dispersion by Aphron Flotation

Oxidative scrubbing is used to remove H2S from gas streams. A key problem in regeneration of the absorbent is the removal of fine particles of sulphur from the suspension of the scrubbing liquid. Dispersions of ultra-fine bubbles have been called "colloidal gas aphrons" or aphrons for short. These dispersions have interesting properties and it was found that they have particular advantages in t...

Characterization of fine fraction mined from two Finnish landfills.

A fine fraction (FF) was mined from two Finnish municipal solid waste (MSW) landfills in Kuopio (1- to 10-year-old, referred as new landfill) and Lohja (24- to 40-year-old, referred as old landfill) in order to characterize FF. In Kuopio the FF (<20mm) was on average 45±7% of the content of landfill and in Lohja 58±11%. Sieving showed that 86.5±5.7% of the FF was smaller than 11.2mm and the fra...

Characterization and biological stabilization of fine fraction from landfill mining

Landfilling has been the major method to dispose waste for the decades, thus there are thousands of landfills around the world. Landfills contain large amount of resources, which could be used as material or energy. There is an increasing interest for landfill mining which means excavation and processing of waste materials mined from landfills. While previous landfill composition studies have f...

Band Dispersion in Serpentine Channels of Microfluidic Electrokinetic Separation Systems

Fine Separation of Average Time Complexity Classes

We extend Levin’s definition of average polynomial time to arbitrary time-bounds in accordance with the following general principles: (1) It essentially agrees with Levin’s notion when applied to polynomial time-bounds. (2) If a language L belongs to DTIME(T(n)), for some time-bound T(n), then every distributional problem (L;μ) is T on the μ-average. (3) If L does not belong to DTIME(T(n)) almo...