Heavy metals removal from sewage sludge with mixed chelators of N, N-bis(carboxymethyl) glutamic acid and citric acid

2020 ◽  
pp. 1-9
Author(s):  
Xiaofang Guo ◽  
Yulong Chen ◽  
Wei Han ◽  
Lu Wang ◽  
Libing Gao ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Citric Acid ◽  
Sewage Sludge ◽  
Glutamic Acid ◽  
Heavy Metals Removal ◽  
Metals Removal ◽  
Mixed Chelators

Bioproduction of Ferric Sulfate Used during Heavy Metals Removal from Sewage Sludge

2005 ◽  
Vol 34 (3) ◽  
pp. 816-824 ◽  
Author(s):  
Patrick Drogui ◽  
Guy Mercier ◽  
Jean-François Blais
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Ferric Sulfate ◽  
Heavy Metals Removal ◽  
Metals Removal

Enhanced heavy metals removal without phosphorus loss from anaerobically digested sewage sludge

2008 ◽  
Vol 58 (1) ◽  
pp. 201-206 ◽  
Author(s):  
A. Ito ◽  
K. Takahashi ◽  
J. Aizawa ◽  
T. Umita
Keyword(s):  
Heavy Metals ◽  
Hydrogen Peroxide ◽  
Sewage Sludge ◽  
Ferric Hydroxide ◽  
Ferric Sulphate ◽  
Combined Process ◽  
Phosphorus Loss ◽  
Heavy Metals Removal ◽  
Metals Removal ◽  
Digested Sewage Sludge

Heavy metals removal without phosphorus loss from anaerobically digested sewage sludge was investigated by conducting batch experiments using hydrogen peroxide and/or iron sulphate under acidified conditions at pH 3. The addition of hydrogen peroxide to the sludge improved the elution efficiencies of As, Cd, Cu and Zn with phosphorus loss from the sludge. The optimum initial concentrations of hydrogen peroxide were. Respectively. 0.1% for As, Cd, Mn and Zn and 0.5% for Cu and Ni. The combined process of 0.1% hydrogen peroxide and 1 g Fe/L ferric sulphate enhanced the initial elution rate of Cu and Cr compared to the addition of either ferric sulphate or hydrogen peroxide, indicating that oxidants stronger than hydrogen peroxide were produced in the sludge. Furthermore, the combined process immobilised phosphorus in the sludge due to co-precipitation with ferric hydroxide or precipitation as ferric phosphate. It was concluded that there is a possibility that the combined process could remove heavy metals effectively without phosphorus loss from anaerobically digested sewage sludge.

scholarly journals Heavy Metals Removal from Sewage Sludge and Municipal Solid Waste (MSW) by Co-Composting Process

2017 ◽  
Vol 6 (3) ◽  
pp. 276-280
Author(s):  
Vahid Babaee Darzi ◽  
Mohammad Javad Mohammadi ◽  
Abdolkazem Neisi ◽  
Ahmad Reza Yari ◽  
Afshin Takdastan ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Heavy Metals Removal ◽  
Composting Process ◽  
Metals Removal

Metals Related to Radionuclides and Heavy Metals Removal Using Photosynthetic Bacteria Immobilized Recovery Type Porous Ceramic

2010 ◽  
Vol 46 (3) ◽  
pp. 119-127 ◽  
Author(s):  
KEN SASAKI ◽  
CHIHIRO HARA ◽  
KENJI TAKENO ◽  
HIROSHI OKUHATA ◽  
HITOSHI MIYASAKA
Keyword(s):  
Heavy Metals ◽  
Photosynthetic Bacteria ◽  
Porous Ceramic ◽  
Heavy Metals Removal ◽  
Metals Removal
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