Improvement of the quality of sewage sludge compost by adding natural clinoptilolite

M. A. Stylianou; V. J. Inglezakis; K. G. Moustakas; M. D. Loizidou

doi:10.1016/j.desal.2007.06.009

Improvement of the quality of sewage sludge compost by adding natural clinoptilolite

M. A. Stylianou, V. J. Inglezakis, K. G. Moustakas, M. D. Loizidou

Department of Chemical and Materials Engineering

Research output: Contribution to journal › Article › peer-review

34 Citations (Scopus)

Abstract

Zeolites are naturally occurring minerals characterized by high cation exchange and adsorption capacity and, thus, are used for metal uptake from sewage sludge subjected to composting process. In the present paper, changes in the physicochemical characteristics of sewage sludge samples after composting were recorded and analysed. The composting process was carried out for 120 days in pilot bioreactors, which were filled with 20% w/w clinoptilolite and sludge. The experimental results indicated differences in the metal content of the initial sludge and essential changes in pH, %C_org, % organic matter (OM), %N values and heavy metals content. Furthermore, the phytotoxicity tests that were performed showed that sludge samples affected seed germination and root elongation, but no phytotoxic effects were observed. According to the experimental results, it is concluded that the use of natural clinoptilolite leads to the improvement of the quality of the composted sewage sludge.

Original language	English
Pages (from-to)	240-249
Number of pages	10
Journal	Desalination
Volume	224
Issue number	1-3
DOIs	https://doi.org/10.1016/j.desal.2007.06.009
Publication status	Published - Apr 15 2008

Keywords

Clinoptilolite
Composting
Heavy metals
Sludge

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)
Materials Science(all)
Water Science and Technology
Mechanical Engineering

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title = "Improvement of the quality of sewage sludge compost by adding natural clinoptilolite",

abstract = "Zeolites are naturally occurring minerals characterized by high cation exchange and adsorption capacity and, thus, are used for metal uptake from sewage sludge subjected to composting process. In the present paper, changes in the physicochemical characteristics of sewage sludge samples after composting were recorded and analysed. The composting process was carried out for 120 days in pilot bioreactors, which were filled with 20% w/w clinoptilolite and sludge. The experimental results indicated differences in the metal content of the initial sludge and essential changes in pH, %Corg, % organic matter (OM), %N values and heavy metals content. Furthermore, the phytotoxicity tests that were performed showed that sludge samples affected seed germination and root elongation, but no phytotoxic effects were observed. According to the experimental results, it is concluded that the use of natural clinoptilolite leads to the improvement of the quality of the composted sewage sludge.",

keywords = "Clinoptilolite, Composting, Heavy metals, Sludge",

author = "Stylianou, {M. A.} and Inglezakis, {V. J.} and Moustakas, {K. G.} and Loizidou, {M. D.}",

note = "Funding Information: This paper has been prepared in the frame-work of the E.P.E.A.E.K. II Pythagoras project entitled Investigation and optimization of systems using natural zeolites and other mineral materials in environmental applications. The authors would like to express their gratitude to the Ministry of National Education and Religious Affairs of Greece which is financing all E.P.E.A.E.K II projects. The Project is co-funded by the European Social Fund (75%) and National Resources (25%). Copyright: Copyright 2008 Elsevier B.V., All rights reserved.",

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AU - Stylianou, M. A.

AU - Inglezakis, V. J.

AU - Moustakas, K. G.

AU - Loizidou, M. D.

N1 - Funding Information: This paper has been prepared in the frame-work of the E.P.E.A.E.K. II Pythagoras project entitled Investigation and optimization of systems using natural zeolites and other mineral materials in environmental applications. The authors would like to express their gratitude to the Ministry of National Education and Religious Affairs of Greece which is financing all E.P.E.A.E.K II projects. The Project is co-funded by the European Social Fund (75%) and National Resources (25%). Copyright: Copyright 2008 Elsevier B.V., All rights reserved.

PY - 2008/4/15

Y1 - 2008/4/15

N2 - Zeolites are naturally occurring minerals characterized by high cation exchange and adsorption capacity and, thus, are used for metal uptake from sewage sludge subjected to composting process. In the present paper, changes in the physicochemical characteristics of sewage sludge samples after composting were recorded and analysed. The composting process was carried out for 120 days in pilot bioreactors, which were filled with 20% w/w clinoptilolite and sludge. The experimental results indicated differences in the metal content of the initial sludge and essential changes in pH, %Corg, % organic matter (OM), %N values and heavy metals content. Furthermore, the phytotoxicity tests that were performed showed that sludge samples affected seed germination and root elongation, but no phytotoxic effects were observed. According to the experimental results, it is concluded that the use of natural clinoptilolite leads to the improvement of the quality of the composted sewage sludge.

AB - Zeolites are naturally occurring minerals characterized by high cation exchange and adsorption capacity and, thus, are used for metal uptake from sewage sludge subjected to composting process. In the present paper, changes in the physicochemical characteristics of sewage sludge samples after composting were recorded and analysed. The composting process was carried out for 120 days in pilot bioreactors, which were filled with 20% w/w clinoptilolite and sludge. The experimental results indicated differences in the metal content of the initial sludge and essential changes in pH, %Corg, % organic matter (OM), %N values and heavy metals content. Furthermore, the phytotoxicity tests that were performed showed that sludge samples affected seed germination and root elongation, but no phytotoxic effects were observed. According to the experimental results, it is concluded that the use of natural clinoptilolite leads to the improvement of the quality of the composted sewage sludge.

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Improvement of the quality of sewage sludge compost by adding natural clinoptilolite

Abstract

Keywords

ASJC Scopus subject areas

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