for the digestion of sludge. the efficiency of this process depends upon ph, temperature, waste loading, absence of oxygen and toxic materials. some of the commonly used biological treatment processes are described below: aerated lagoons: these are large holding tanks or ponds having a depth of - m...
relations with vietnam, laying the groundwork for a strong bilateral and economic relationship between the countries. vietnam and russia set up a strategic partnership back in and elevated this relationship to a comprehensive strategic partnership in paving the way for increasing economic ties. the...
relations with vietnam, laying the groundwork for a strong bilateral and economic relationship between the countries. vietnam and russia set up a strategic partnership back in and elevated this relationship to a comprehensive strategic partnership in paving the way for increasing economic ties. the...
processes for both chemical and mechanical pulping. our portfolio is built on strong r&d to guarantee high end-product quality. for improved process efficiency and increased business profitability, turn to valmet. we offer intelligent automation solutions and services for the pulping industry, with solid...
responsible for the color were removed in subsequent purification steps. the resulting residue was dissolved in hno (aq) ( ml, conc), evaporated to a soft dryness, and dissolved again in hno (aq) ( ml, conc). this evaporation/dissolution step was repeated a total of three times. the evaporation of these...
highly durable and non-biodegradable, they can consume valued space in landfills. [ ] in , it was estimated that over billion scrap tires were in stockpiles in the united states. as of , only million tires remain in stockpiles. [ ] from to , the european union increased the amount of tires recycled...
42.8 mt in 1q17, representing 67% of all iron ore fines sales volumes in 1q17 and in line with the share of cfr sales in 4q16 (69%). net operating revenue by product us$ million 1q17 4q16 1q16 iron ore fines 4,826 5,576 2,917 rom 15 28 4 pellets 1,459 1,216 753 manganese & ferroalloys 86 117 47 others...