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Acid treatment of anaerobically digested sludge: Effect on heavy metal content and dewaterability
AbstractThe present investigation is an attempt to study the effects of various common acids (hydrochloric, nitric and sulfuric), with and without the presence of hydrogen peroxide, on the heavy metal content and dewaterability of digested sludge. The results revealed the significant impact of hydrogen peroxide in various acid treatments. Further consideration concerning the treatability of the filtrate resulting after liquid-solid separation indicated the advantages of hydrochloric acid. A combination of hydrochloric acid and hydrogen peroxide appears to be useful as a potential secondary sludge treatment method to improve the quality of digested sludge, both in terms of its handleability and reutilization value. The process advantages of the proposed treatment method are discussed in comparison with conventional systems.
Acid treatment of anaerobically digested sludge: Effect on heavy metal content and dewaterability
AbstractThe present investigation is an attempt to study the effects of various common acids (hydrochloric, nitric and sulfuric), with and without the presence of hydrogen peroxide, on the heavy metal content and dewaterability of digested sludge. The results revealed the significant impact of hydrogen peroxide in various acid treatments. Further consideration concerning the treatability of the filtrate resulting after liquid-solid separation indicated the advantages of hydrochloric acid. A combination of hydrochloric acid and hydrogen peroxide appears to be useful as a potential secondary sludge treatment method to improve the quality of digested sludge, both in terms of its handleability and reutilization value. The process advantages of the proposed treatment method are discussed in comparison with conventional systems.
Acid treatment of anaerobically digested sludge: Effect on heavy metal content and dewaterability
Cheung, Y.H. (author)
Environmental International ; 14 ; 553-561
1989-01-31
9 pages
Article (Journal)
Electronic Resource
English
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