Reducing the Heavy Metal Content of Sewage Sludge by Advanced Sludge Treatment Methods

2006 ◽  
Vol 23 (6) ◽  
pp. 994-999 ◽  
Author(s):  
Raf Dewil ◽  
Jan Baeyens ◽  
Elisabeth Neyens
Keyword(s):  
Heavy Metal ◽  
Sewage Sludge ◽  
Metal Content ◽  
Heavy Metal Content ◽  
Sludge Treatment ◽  
Treatment Methods

EFFECTS OF SEWAGE SLUDGE APPLICATION ON THE HEAVY METAL CONTENT OF WHEAT AND FORAGE CROPS

1979 ◽  
Vol 59 (3) ◽  
pp. 231-239 ◽  
Author(s):  
M. A. ZWARICH ◽  
J. G. MILLS
Keyword(s):  
Heavy Metal ◽  
Sewage Sludge ◽  
Metal Content ◽  
Considerable Increase ◽  
Heavy Metal Content ◽  
Forage Crops ◽  
Sludge Treatment ◽  
Forage Crop ◽  
Wheat Kernels ◽  
Sludge Application

A growth chamber experiment was employed to investigate the effect of digested sewage sludge application on the heavy metal content of wheat and brome-alfalfa forage crops. Samples of wheat were also obtained from farm fields which had received heavy applications of sludge. No adverse effects on yields or appearance of crops were noted. The tissue levels of Hg, Cr and Pb were unaffected by sludge treatment. Cu levels in wheat kernels and straw were only slightly increased, but Cu levels in the forage crop were elevated by the sludge treatment. There was a considerable increase in the Zn content of all crops, but levels were not excessive. Sludge treatment produced up to a sixfold increase in the Cd content of wheat kernels and a considerable increase in the Cd content of the forage crop. The increased cadium levels are undesirable, but can be controlled by restricting the sludge application rate. There was little or no effect of sludge treatment on Cd levels in wheat straw.

Sign in / Sign up

Export Citation Format

Share Document