Coke furnace wastewater

Sakoda, A., Nomura T. and Suzuki M. (1996), Application of Activated Carbon Membrane to Water Treatments Decolorization of Coke Furnace Wastewater, Adsorption, 3(1), 93-98. 

Sakoda, A., Nomura, T., and Suzuki, M. (1996). Activated carbon membrane for water treatments application to decolorization of coke furnace wastewater. Adsorption 3 93-98. Miller, J. R., and Koros, W. J. (1990). The formation of chemically modified y-Alumina microporous membranes. Sep. Sci. Technol. 23 1237-1280. 

Polyvinylidene chloride (PVDC) and polyvinyl alcohol (PVA) microspheres were carbonized on ceramic membrane to fabricate activated carbon membrane for coke furnace wastewater treatment [15]. A ceramic tube was dipped into a polymer latex containing 70 wt% PVDC and PVA microspheres of 0.10-0.15 pm to form aggregates of polymeric microspheres on and within (within pores of) the ceramic pipe. The precinsor was heated at 300°C and further to 750°C for carbonization. Major decomposition of the polymeric precursor seems to occur at 300°C. By nitrogen adsorption applying Horvath and Kowazoe method the membrane was found to have micropores of 0.7-0.8 run in diameter and meso-pores of 2-20 nm. Hence, the membrane has bimodal pore size distribution. The molecular weight cutoff of the membrane was ca. 10,000 Dalton. 

Coke furnace wastewater containing dissolved organic carbon (DOC) of 69 ppm and two peaks at the molecular weight of 400 and 10,000 Da was subjected to the filtration by the activated carbon membrane. Figure 9.20 displays (permeate concentration in chemical oxygen demand (COD)/feed concentration in COD=C/Co) versus effluent volume. Each curve indicates the typical breakthrough cirrve but interestingly the curve never exceeds (C/Co) ratio of 0.68, which means 32% of the COD is removed by the sieve mechanism. Hence, the COD removal by the... 

Iron making. Molten iron is produced for steel making in blast furnaces using coke, iron ore, and limestone. Blast furnace operations use water for noncontact cooling of the furnace, stoves, and ancillary facilities and to clean and cool the furnace top gases. Other water, such as floor drains and drip legs, contribute a lesser portion of the process wastewaters. 

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