Different solvents for the regeneration of the exhausted activated carbon used in the treatment of coking wastewater

Simulation and optimization of a coking wastewater biological treatment process by activated sludge models (ASM)

“…Despite that a higher S s of the coking wastewater was observed, the relatively higher S I suggested that the wastewater was more difficult to be treated by biological processes. Different from the other wastewater, the S I in the coking wastewater was mainly composed of many hardly biodegradable substances such as poly aromatic hydrocarbons (PAHs), pyridines, indoles and quinolines (Guo et al, 2011;Chu et al, 2012). In addition, the X S in the case of CWTP was concluded as a much lower value of 0.12.…”

“…It generally contains not only concentrated biodegradable components but also refractory organic pollutants such as phenols, polycyclic aromatic hydrocarbons (PAHs), pyridines, indoles, and quinolines (Guo et al, 2011;Chu et al, 2012). The particular characteristics of the wastewater should make the CWTP possess of very complicated biological processes to obtain good treatment efficiency.…”

Biodegradation characterization and immobilized strains’ potential for quinoline degradation by Brevundimonas sp. K4 isolated from activated sludge of coking wastewater

“…During the process of coke production, coking wastewater is generated from the high-temperature carbonization of coal, gas purification, and by-product recovery and refining, [3][4][5] and its discharge volume is about 2.85 × 10 8 m 3 per year. [6][7][8] As a typical industrial wastewater, the composition of coking wastewater is very complex, with the characteristics of high toxicity and difficult biodegradation, 4) in which the organic pollutants mainly include N-heterocyclic compounds (NHCs) and polycyclic aromatic hydrocarbons. 3,5,8) Biological treatment technologies, such as anoxicoxic (A-O), anaerobic-anoxic-oxic (A 1 -A 2 -O), anaerobic-oxic-oxic (A 1 -O 1 -O 2 ), 9) and sequencing batch reactor (SBR), are usually used for coking wastewater treatment.…”

Decolorization of turbid sugar juice from sugar factory using waste powdered carbon

“…), and this is our noble target for decreasing the color as much as possible. There are physical and chemical treatments for dealing with PAC, but the thermal and chemical activation methods are the most predominant techniques for regeneration of exhausted PAC Lu et al 2011;Guo et al 2011;Lim and Okada 2005;Simaratanamongkol and Thiravetyan 2010). Thus, the temperature was raised up to 600 °C in the thermal activation process (Martin and Ng 1984).…”