The effect of postcellulose waste and municipal sewage sludge on plants and on physicochemical properties of soil

Robert Pełka

Abstract

Environmental management of postcellulose waste (sludge from paper production) and municipal sewage sludge appears to be substantiated due to the physicochemical properties of these wastes. The aim of the conducted research was to determine the effect of postcellulose waste and sewage sludge on yielding and chemical composition of a plant mixture and on the basic physicochemical properties of soil. The research was conducted under laboratory conditions and under conditions of a field experiment, determining the fertilizing value of these wastes in the environmental aspect. It was established that, as compared with the postcellulose waste, the municipal sewage sludge applied in the experiments had a higher content of macroelements and microelements. The content of heavy metals in the studied waste did not exceed the limits that condition their use in agriculture and reclamation. Based on a bioassay, it was established that the postcellulose waste was toxic, whereas the mixture of postcellulose waste and sewage sludge was regarded as low toxic to the test plants. The mixtures of postcellulose waste and municipal sewage sludge increased the plant mixture yield. Applying only the sewage sludge also increased the yield of the plants. Applying only the postcellulose waste did not significantly decrease the yield of the plants. The waste applied to soil increased the content of Cr, Cd, Pb, Cu and Zn in the plant mixture. The level of heavy metal content in the plant mixture did not exclude this biomass from being used for fodder or reclamation purposes. The postcellulose waste and municipal sewage sludge increased the heavy metal uptake by the plant mixture. The plant biomass extracted more heavy metals from the sewage sludge than from the postcellulose waste. It was established that, from the analyzed heavy metals, Ni was extracted in the highest amount (30%), followed by Cd (20%), Cr (15%), Pb (10%), Cu (9%) and Zn – in the smallest amount (8%). The addition of the wastes and their mixtures improved soil chemical properties. The mixtures increased the content of base cations, and the content of organic carbon, total nitrogen and available P, K, and Mg in soil. Application of the postcellulose waste and sewage sludge to soil also increased the content of heavy metals in soil. After applying the wastes to soil, soil quality standards were maintained. Heterogeneity in the chemical composition of the wastes confirms that each batch intended to be used in environmental management should be bioassayed and undergo chemical tests.
Diploma typeDoctor of Philosophy
Author Robert Pełka
Robert Pełka,,
-
Title in EnglishThe effect of postcellulose waste and municipal sewage sludge on plants and on physicochemical properties of soil
Languagepl polski
Certifying University/Institution (when outside UAK)Uniwersytet Przyrodniczy w Lublinie, MNiSW [80]
Disciplineagricultural sciences / (agriculture)
Scientific discipline (2.0)4.2 agriculture and horticulture
Start date28-06-2017
Defense Date13-02-2018
End date21-02-2018
Supervisor Jacek Antonkiewicz (FoAaE / DoAaECh)
Jacek Antonkiewicz,,
- Department of Agricultural and Environmental Chemistry

Pages144
Keywords in Englishpostcellulose waste (sludge from paper production), municipal sewage sludge, heavy metals, yielding, content, uptake, balance
Abstract in EnglishEnvironmental management of postcellulose waste (sludge from paper production) and municipal sewage sludge appears to be substantiated due to the physicochemical properties of these wastes. The aim of the conducted research was to determine the effect of postcellulose waste and sewage sludge on yielding and chemical composition of a plant mixture and on the basic physicochemical properties of soil. The research was conducted under laboratory conditions and under conditions of a field experiment, determining the fertilizing value of these wastes in the environmental aspect. It was established that, as compared with the postcellulose waste, the municipal sewage sludge applied in the experiments had a higher content of macroelements and microelements. The content of heavy metals in the studied waste did not exceed the limits that condition their use in agriculture and reclamation. Based on a bioassay, it was established that the postcellulose waste was toxic, whereas the mixture of postcellulose waste and sewage sludge was regarded as low toxic to the test plants. The mixtures of postcellulose waste and municipal sewage sludge increased the plant mixture yield. Applying only the sewage sludge also increased the yield of the plants. Applying only the postcellulose waste did not significantly decrease the yield of the plants. The waste applied to soil increased the content of Cr, Cd, Pb, Cu and Zn in the plant mixture. The level of heavy metal content in the plant mixture did not exclude this biomass from being used for fodder or reclamation purposes. The postcellulose waste and municipal sewage sludge increased the heavy metal uptake by the plant mixture. The plant biomass extracted more heavy metals from the sewage sludge than from the postcellulose waste. It was established that, from the analyzed heavy metals, Ni was extracted in the highest amount (30%), followed by Cd (20%), Cr (15%), Pb (10%), Cu (9%) and Zn – in the smallest amount (8%). The addition of the wastes and their mixtures improved soil chemical properties. The mixtures increased the content of base cations, and the content of organic carbon, total nitrogen and available P, K, and Mg in soil. Application of the postcellulose waste and sewage sludge to soil also increased the content of heavy metals in soil. After applying the wastes to soil, soil quality standards were maintained. Heterogeneity in the chemical composition of the wastes confirms that each batch intended to be used in environmental management should be bioassayed and undergo chemical tests.

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