Bioremediation of polycyclic aromatic hydrocarbons (PAHs)-contaminated sewage sludge by different composting processes.
The efficiency of four different composting processes to bioremediate polycyclic aromatic hydrocarbons (PAHs)-contaminated sewage sludge was investigated. Prior to composting, sewage sludge coming from the Datansha wastewater treatment plant, Guangzhou, China, was mixed with rice straw to obtain a C/N ratio of 13:1. After 56 days of composting, the total concentrations of 16 PAHs (Sigma(PAHs)) ranged from 1.8 to 10.2 mg kg(-1) dry weight, decreasing in order of inoculated-manual turned compost (IMTC)>manual turned compost (MTC)>continuous aerated compost (CAC)>intermittent aerated compost (IAC), exhibiting removal rates of 64%, 70%, 85% and 94%, respectively. Individual PAHs were generally removed in similar rates. IAC treatment showed a higher removal rate of high molecular weight PAHs and carcinogenic PAHs comparing to the other composting processes.
Cai
Quan-Ying
QY
College of Resources and Environment, South China Agricultural University, Guangzhou 510642, China. cai_quanying@yahoo.com
Mo
Ce-Hui
CH
Wu
Qi-Tang
QT
Zeng
Qiao-Yun
QY
Katsoyiannis
Athanasios
A
Férard
Jean-François
JF
D052918:Environmental Restoration and Remediation / Q000379:methods*; D008401:Gas Chromatography-Mass Spectrometry; D008970:Molecular Weight; D012275:Oryza; D011083:Polycyclic Compounds / Q000302:isolation & purification*; D011786:Quality Control; D012722:Sewage / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
D011083:Polycyclic Compounds; D012722:Sewage; D014874:Water Pollutants, Chemical