The impact of coagulant type and dosage on the clarity, zeta potential, floc size, structure a coal slurry suspension was investigated. results showed that critical coagulation concentrations trivalent ions are 0.81 mM 0.018 for coal–coal coal–kaolinite, respectively, which lower than those divalent ions. initial settling more affected by AlCl3 FeCl3 MgCl2 CaCl2, while supernatant turbidity sig...

The amount of animal manure used in modern agriculture is increasing due to the increase in global animal production. Pig slurry is known to contain zoonotic bacteria such as E. coli, Salmonella spp. and Campylobacter spp., and viruses such as hepatitis E virus and group A rotavirus. Coliform bacteria, present in manure, have previously been shown to leach into tile drains. This poses a potenti...

Abstract Taking the limestone gypsum wet desulfurization oxidation air duct of a 660 MW coal-fired unit in power generation enterprise as research object, new type bubble crushing and retention device with wing span baffle structure was simulated optimized using CFD numerical simulation technology. The results showed that time bubbles slurry final design scheme about 10.4 seconds, significantly...

Mining operations in China are often threatened by frequent water inrushes from confined karst aquifers, We need to evaluate the risk from water-inrush from coal floors in order to have safe production in mines. water inrush risk assessment method based on fuzzy comprehensive evaluation is introduced in this paper. A secondary fuzzy comprehensive evaluation system is constructed to evaluate the...

The granite stone is the most widely used in the construction and granite slurry is generated through cutting and polishing of the stone. Granite slurry is waste material consisting of very fine powder and creats disposal and environmental problems in worldwide today. Disposal of granite waste leads to health hazards like respiratory and allergy problems to the people around. It also causes the...

This study seeks to address the problems of major geo-environmental hazards caused by high-intensive coal mining in China’s western eco-environment frangible area including strong mining pressure, surface subsidence, soil and water loss, and land desertification. Using the high-intensive mining at the Xiao-jihan Coal Mine, this paper investigates the compaction characteristics of aeolian sand-b...