Physico-Chemical and Energetic Process of Sewage Sludge Fermantation of Tunisian Station and Its Rehabilitation

2000 ◽  
pp. 2414-2417
Author(s):  
A. Mlaouhi ◽  
Z. Alouini ◽  
S. Labiadh ◽  
D. Depeyre
Keyword(s):  
Sewage Sludge ◽  
Physico Chemical

scholarly journals Optimal Solutions for the Use of Sewage Sludge on Agricultural Lands

Water ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 585
Author(s):  
Catalina Iticescu ◽  
Puiu-Lucian Georgescu ◽  
Maxim Arseni ◽  
Adrian Rosu ◽  
Mihaela Timofti ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Agricultural Production ◽  
Agricultural Land ◽  
Chemical Characteristics ◽  
Optimal Solutions ◽  
Physico Chemical ◽  
Agricultural Areas ◽  
The Impact ◽  
Made In

The use of sewage sludge in agriculture decreases the pressure on landfills. In Romania, massive investments have been made in wastewater treatment stations, which have resulted in the accumulation of important quantities of sewage sludge. The presence of these sewage sludges coincides with large areas of degraded agricultural land. The aim of the present article is to identify the best technological combinations meant to solve these problems simultaneously. Adapting the quality and parameters of the sludge to the specificity of the land solves the possible compatibility problems, thus reducing the impact on the environment. The physico-chemical characteristics of the fermented sludge were monitored and optimal solutions for their treatment were suggested so as to allow that the sludge could be used in agriculture according to the characteristics of the soils. The content of heavy metals in the sewage sludge was closely monitored because the use of sewage sludge as a fertilizer does not allow for any increases in the concentrations of these in soils. The article identifies those agricultural areas which are suitable for the use of sludge, as well as ways of correcting some parameters (e.g., pH), which allow the improvement of soil quality and obtained higher agricultural production.

Impact of urban sewage sludge on soil physico‐chemical properties and phytotoxicity as influenced by soil texture and reuse conditions

2020 ◽  
Vol 49 (4) ◽  
pp. 973-986
Author(s):  
Sarra Hechmi ◽  
Helmi Hamdi ◽  
Sonia Mokni‐Tlili ◽  
Manel Ghorbel ◽  
Mohamed Naceur Khelil ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Soil Texture ◽  
Chemical Properties ◽  
Urban Sewage ◽  
Physico Chemical ◽  
Urban Sewage Sludge

The effect of clay amendment on speciation of heavy metals in sewage sludge

1996 ◽  
Vol 34 (7-8) ◽  
pp. 413-420 ◽  
Author(s):  
L. Qiao ◽  
Goen Ho
Keyword(s):  
Heavy Metals ◽  
Organic Matter ◽  
Sewage Sludge ◽  
Red Mud ◽  
Heavy Metal Contamination ◽  
Metal Speciation ◽  
Metal Mobility ◽  
Potential Hazard ◽  
Application Rates ◽  
Physico Chemical

When sewage sludge is used as a soil conditioner, heavy metal contamination can limit its application rates. The potential hazard of heavy metals is, however, dependent on the physico-chemical forms of the metals in the sludge and soil. Bauxite refining residue (red mud) has been used to reduce the mobility and availability of heavy metals in municipal solid waste compost. In the present research a sequential step extraction was employed to investigate metal speciation (into exchangeable, bound to carbonate, to Mn & Fe oxides, to organic matter and in residue phase) and the effect of red mud on metal speciation in sewage sludge for Cd, Cr, Cu, Ni, Pb and Zn. The effect of red mud addition on metal distribution in sewage sludge compost was significant. Red mud addition can effectively reduce the metal mobility and the potential hazard of releasing metals from sludge due to the further breakdown of organic matter. Drying of sludge makes heavy metals more available. Red mud addition will be desirable in such a case. Plant available metals (determined by DTPA extraction) are, however, not as effectively reduced except for Pb and Zn.

scholarly journals Evolution of nitrogen mineralization dynamics and bean production with three different organic amendments in the arid soil of south Tunisia

Italus Hortus ◽  
2021 ◽  
Vol 28 (1) ◽  
pp. 74
Author(s):  
Nissaf Karbout ◽  
Houda Beser ◽  
Latifa Dhaouidi ◽  
Mohamad Wahba ◽  
Mohamed Moussa
Keyword(s):  
Sewage Sludge ◽  
Organic Amendments ◽  
Soil Salinization ◽  
Physico Chemical ◽  
Bean Plants ◽  
Carbon Nitrogen Ratio ◽  
Nitrogen Ratio ◽  
One Year ◽  
Experimental Trials ◽  
The Impact

Although the importance of organic amendments on arid soils of semi-arid and arid lands in improving long-term soil fertility, the excessive use of these amendments may induce the mineralization of the soil’s native organic components. Thus, this study focused on the examination of the impact of the use of three different amendments, sewage sludge, compost, and horse manure on nitrogen soil dynamics as well on the physico-chemical characteristics (soil texture, nitrogen cycle, and carbon concentration) and plant characteristics (morphology and production). In this context, the present work discusses one of the major issues challenging sustainable agriculture development related to increasing land degradation, soil salinization, and fertility loss. The three amendments were applied on the soil collected at the Institute of Arid Regions of Gabes. The findings of these experimental trials indicated that compost seems to be the most valuable organic amendment that may be used for an adequate supply of nitrogen and optimal benefits for plant growth. The highest mineral nitrogen content was found in the treatment with sludge. The manure-based treatment had the highest carbon/nitrogen ratio (C/N=25). The effects of the amendments were well reflected in the growth and production of bean plants after one year from the amendment. An increase in biomass was observed in the amended pots. The highest increase in pods biomass was obtained in the pots amended with sewage sludge and vegetable compost followed by household manure treatment

scholarly journals Microplastics in Sewage Sludge: A Known but Underrated Pathway in Wastewater Treatment Plants

2021 ◽  
Vol 13 (22) ◽  
pp. 12591
Author(s):  
Maria Cristina Collivignarelli ◽  
Marco Carnevale Miino ◽  
Francesca Maria Caccamo ◽  
Chiara Milanese
Keyword(s):  
Wastewater Treatment ◽  
Sewage Sludge ◽  
Wastewater Treatment Plants ◽  
Chemical Characterization ◽  
Analytical Techniques ◽  
Future Research ◽  
Qualitative And Quantitative ◽  
Physico Chemical ◽  
Sludge Properties ◽  
Collection Methods

Interest in the presence of microplastics (MPs) in wastewater has grown significantly in recent years. In fact, wastewater treatment plants (WWTPs) represent the last barrier before the discharge of MPs into an aquatic ecosystem. The research has highlighted how MPs are in part effectively removed from the waters and accumulated inside the sewage sludge (SeS) produced by the WWTP, being a cause for concern, especially in the case of agricultural reuse. This work aims to analyze the existing literature on the (i) methodical procedure for MPs analysis (thermal, spectroscopic, optical analyses), (ii) qualitative and quantitative presence of MPs in SeS, (iii) effect on sludge properties, and (iv) the possible accumulation in amended soils. Based on the results already obtained in the literature, this work aims to provide critical insights to stimulate interest in the topic and direct future research on aspects that should be deepened. In particular, it emerges that there is a clear need for standardization of the collection methods and the analytical techniques for identifying and quantifying MPs, since their physico-chemical characterization and the study on aging and on the response towards acid or basic pre-treatments are fundamental for the understanding of microplastics ecotoxicological potential.

scholarly journals Nitrogen Isotope Fractionation during Composting of Sewage and Agri-Food Sludge with Pruning Waste

Agronomy ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1954
Author(s):  
José Antonio Sáez ◽  
Pilar Flores ◽  
María Ángeles Bustamante ◽  
Juan C. Sanchez-Hernandez ◽  
Raúl Moral ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Municipal Wastewater ◽  
Nitrogen Isotope ◽  
Raw Material ◽  
Bulking Agents ◽  
Physico Chemical ◽  
Phosphorus And Potassium ◽  
Degree Of Maturity ◽  
The Stability

This work studies the changes in δ15N signature during the composting of sewage sludge (MS) and agri-food sludge (AS) with different bulking agents and the potential relationships between the changes in this parameter with both the source of the organic matter used as a raw material and the stability of the end-materials obtained. For this, eleven mixtures were prepared in commercial composting conditions using sewage sludge from municipal wastewater in a range of 60–85% (on a fresh weight basis) or agri-food sludge in a range of 65–75%, mixed with seven different pruning wastes as bulking agents. The thermal profile was monitored throughout the composting processes, and the main physico-chemical and chemical parameters were determined. The results obtained confirmed a correct development of the composting processes, observing slight differences in process evolution depending on the type of sludge used. The composts obtained showed adequate contents of nitrogen, phosphorus and potassium (NPK) and reached a good degree of maturity. Significant differences in the specific nitrogen isotopic composition were found in the initial materials. Moreover, the results suggest that the type of sludge had a main contribution in the δ15N value of the initial composting mixtures. The use of δ15N is recommended as an indicator of the composting process, especially to evaluate N dynamics, and the quality of the resultant compost.

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