Web1. aug 2005 · These were sulfidization of the pulp prior toflotation and using nitrogen to replace air in flotation. Sulfidization requires pulp potential control to keep this parameter …

Basic effects of pulp refining on fiber properties--a review

WebHydrogen sulfide is a flammable, colorless gas that smells like rotten eggs. People usually can smell hydrogen sulfide at low concentrations in air ranging from 0.0005 to 0.3 parts per million (ppm). Hydrogen sulfide occurs naturally in crude petroleum, natural gas, volcanic gases, and hot springs. It can also result from bacterial WebThe aim of this study is to bioleach spent petroleum refinery catalyst at variant pulp densities (PD) (5, 10 and 15%) using microorganisms in acidic pH (1.5–1.6) and mesophilic temperature (30–35 °C). ... The oxidation–reduction cycle goes on until all the metal sulfide in the pulp is oxidized. ... The effect of varying pulp density (5 ... symmes valley vs. south gallia

Effects of Grinding Media on Grinding Products and Flotation ...

Webfound in black liquor partly turn into hydrogen sulfide during gasification and exit the gasifier in the syngas. Their efficient recovery in their sulfidic form to the pulping process is of utmost importance. Current studies focus on black liquor gasifier syngas desulfurization only. … WebYou can have respiratory and neurological effects if you are exposed to higher concentrations of hydrogen sulfide, at least 100 times higher than typical environmental levels. The effects can include: Eye irritation Nose irritation Throat irritation Difficulty breathing in people with asthma Headaches Poor memory Tiredness Balance problems WebThe microbial community analysis showed Desulfovibrio as the most abundant genus in a dynamic and diverse bioreactor consortium. During periods of biogenic hydrogen sulfide production, the average dissolved sulfide concentration was 507 mg L−1 and the average volumetric sulfate reduction rate was 278 mg L−1 d−1. symmes valley school