In recent years, the increase of sewage sludge generated in the sewage treatment process has become a problem. For the purposes of waste reduction and recycling, following incineration, sewage sludge is being re-used as cement material, civil engineering material, and fertilizer, etc. However, the reuse of sewage sludge, from the standpoints of environmental protection and potential health hazards, requires that its toxic heavy metal content is carefully examined. And, to ensure that treated sewage water meets effluent standards, sewage sludge ash must be analyzed with high sensitivity to accurately quantify such elements as Pb and Cd, which may be present at trace levels up to high concentrations.
Here, using the Shimadzu ICPE-9820 multi-type ICP atomic emission spectrometer, we conducted analysis of processed water from a sewage treatment plant, in addition to sewage sludge ash.