NDLI: Effects of Composting Process and Fly Ash Amendment on Phytotoxicity of Sewage Sludge

Content Provider	Springer Nature Link
Author	Lau, S. S. S. Fang, M. Wong, J. W. C.
Copyright Year	2001
Abstract	With the increasingly growing global production of sewage sludge, evaluation of its applicability in agriculture and land restoration is essential. This study assessed the potential effects of composting process and fly ash amendment on soil-ameliorating properties of sewage sludge. The metal availability and phytotoxicity of ash-amended sludge compost (AS, mature sewage sludge compost mixed with fresh lagoon ash) and sludge-ash co-compost (SA, co-composted mixture of sewage sludge and lagoon ash) were compared. The results of this work suggested that both composts favored the applicability of sewage sludge for land application by reducing Cd, Cu, Pb, and Zn availability. The SA co-compost stimulated seed germination at ash amendment rates of ≤10%, whereas various treatments of AS compost inhibited germination at an extract dilution of 50%. Amendment of lagoon ash before or after sludge composting increased electrical conductivity (EC) and volatilization of NH4-N, but lowered availability of PO4-P. Together with the results of phytotoxicity, an optimal ash amendment rate of 5% for AS and 10% for SA were most desirable. Alkaline amendment prior to sludge composting was recommended, because it could be more effective in reducing soluble and plant-available metal concentrations through the composting process.
Starting Page	184
Ending Page	191
Page Count	8
File Format	PDF
ISSN	00904341
Journal	Archives of Environmental Contamination and Toxicology
Volume Number	40
Issue Number	2
e-ISSN	14320703
Language	English
Publisher	Springer-Verlag
Publisher Date	2001-02-01
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Content Type	Text
Resource Type	Article
Subject	Pollution Health, Toxicology and Mutagenesis Medicine Toxicology

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Effects of Composting Process and Fly Ash Amendment on Phytotoxicity of Sewage Sludge

Leaching of Heavy Metals from Artificial Soils Composed of Sewage Sludge and Fly Ash

Solubility of Trace Elements and Heavy Metals from Stabilized Sewage Sludge by Fly Ash

Growth and Elemental Accumulation of Plants Grown in Acidic Soil Amended With Coal Fly Ash–Sewage Sludge Co-compost

Degradation of Nonylphenol Ethoxylates (NPE) in Sewage Sludge and Source Separated Municipal Solid Waste Under Bench-Scale Composting Conditions

Effects of UV-B on Photochemical Behavior of Fly Ash Particle-Associated PCDD/Fs

Effects of wastewater irrigation and sewage sludge application on soil residues of chiral fungicide benalaxyl.

Phytotoxic effects of sewage sludge extracts on the germination of three plant species

Effects on Speciation of Ni & Cd in Sewage Sludge during Composting Only and Co-composting with Fly Ash Added

Effects of Composting Process and Fly Ash Amendment on Phytotoxicity of Sewage Sludge

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