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eISSN: 2083-5906
ISSN: 1230-1485
ISSN: 1230-1485
ORIGINAL RESEARCH
Feasibility of Sewage Sludge Leached
by Aspergillus Niger in Land Utilization
Ying Xu1,2, Yue-Yang Feng2
1Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes of Ministry of Education,
Hohai University, Nanjing, 210098, China
2College of Environment, Hohai University, Nanjing, China
Hohai University, Nanjing, 210098, China
2College of Environment, Hohai University, Nanjing, China
Submission date: 2014-09-23
Final revision date: 2015-11-28
Acceptance date: 2015-12-02
Publication date: 2016-01-25
Pol. J. Environ. Stud. 2016;25(1):405-412
KEYWORDS
TOPICS
ABSTRACT
Aspergillus niger is adopted in bioleaching to dispose of sludge from an urban wastewater treatment
plant to determine the bioleaching influence of sludge on heavy metal fraction and nutritive material loss.
The enrichment effect on wheat seedlings of Cu, Zn, Pb, and Cd in sludge is researched by a soil-cultivated
experiment. Results indicate that the removal rates of Cu, Zn, Pb, and Cd are 74.1%, 87.6%, 82.1%, and
97.8% in the sludge after bioleaching, respectively. The remaining heavy metal in the sludge is mainly residual
fraction followed by oxidizable fraction. The bioefficiency of the heavy metal decreases significantly.
The loss rates of N, P, and K in the sludge are 29.8%, 13.3%, and 28.8%, respectively, with good fertility
after bioleaching. The enrichment capacity order of heavy metals is Zn>Pb>Cu>Cd in wheat root and stem
leaf, which is consistent with the order of unstable fraction content in the sludge after bioleaching.
CONFLICT OF INTEREST
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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Water Research
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| eISSN: | 2083-5906 |
| ISSN: | 1230-1485 |
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