Powdered activated carbon for treatment of musty odor in a Southern China water treatment plant [应对南方某水厂土霉嗅味的活性炭技术]

作者：Lyu Q.; Wei Q.^*; Huang X.; Yang K.; Wu Y.; Tang L.; Jia Z.; Yu J.; Shi B.

来源：Chinese Journal of Environmental Engineering, 2018, 12(11): 3034-3042.

DOI：10.12030/j.cjee.201807101

• Activated carbon
• Adsorption
• Drinking water
• Taste and odor

Powdered activated carbon (PAC) adsorption is the main technique for the treatment of seasonal odor problems, the selection of type and dosage of PAC is significant for a water treatment plant (WTP). To deal with seasonal taste and odor problems in a Southern China WTP, in this study the adsorption ability and treatment cost of 9 kinds of common PACs (including 3 kinds of coal activated carbon, 3 kinds of wooden activated carbon and 3 kinds of coconut shellactivated carbon) for 2-methylisoborneol (2-MIB) and geosmin (GSM)removal were compared. Additionally, the influence of pre-oxidation process (sodium hypochlorite and potassium permanganate) on PAC adsorption was taken also into consideration. Results show that the coconut shell activated carbon with an iodine value of 1 030 mg?g -1 presented the highest adsorption capacity among these 9 types of common PACs, and its adsorption capacity for 2-MIB (150 ng?L -1 ) is 6.2 ng?mg -1 . However, the pre-oxidation process significantly reduced the PAC adsorption capacity for 2-MIB and GSM by 29.5% and 31.6%, respectively. Through comprehensive consideration of the treatment efficiency and cost, coal activated carbon with an iodine value of 800 mg?g -1 is the most cost-effective PAC, it could remove 2-MIB with an initial content of 150 ng?L -1 down to below the olfactory threshold, and the treating cost is only 0.3 yuan?t -1 .

• 单位
  中国科学院大学; 东华大学