Agricultural use of sewage sludge and its regulation

1996 ◽  
Vol 43 (1-3) ◽  
pp. 173-177 ◽  
Author(s):  
P. Soler-Rovira ◽  
J. Soler-Soler ◽  
J. Soler-Rovira ◽  
A. Polo
Keyword(s):  
Sewage Sludge ◽  
Agricultural Use

Potential of activated sludge disintegration

2006 ◽  
Vol 53 (12) ◽  
pp. 207-216 ◽  
Author(s):  
M. Boehler ◽  
H. Siegrist
Keyword(s):  
Sewage Sludge ◽  
Cost Evaluation ◽  
Anoxic Zone ◽  
Excess Sludge ◽  
Solid Retention Time ◽  
Biological Sludge ◽  
Operating Stability ◽  
Agricultural Use ◽  
Sludge Ash ◽  
Sludge Production

The disposal of sewage sludge and the agricultural use of stabilised sludge are decreasing due to more stringent regulations in Europe. An increasing fraction of sewage sludge must therefore be dewatered, dried, incinerated and the ashes disposed of in landfills. These processes are cost-intensive and also lead to the loss of valuable phosphate resources incorporated in the sludge ash. The implementation of processes that could reduce excess sludge production and recycle phosphate is therefore recommended. Disintegration of biological sludge by mechanical, thermal and physical methods could significantly reduce excess sludge production, improve the settling properties of the sludge and reduce bulking and scumming. The solubilised COD could also improve denitrification if the treated sludge is recycled to the anoxic zone. However, disintegration partly inhibits and kills nitrifiers and could therefore shorten their effective solid retention time, thus reducing the safety of the nitrification. This paper discusses the potential of disintegration on sludge reduction, the operating stability of nitrification, the improvement of denitrification and also presents an energy and cost evaluation.

Agricultural use and pH correction of anaerobic sewage sludge with acid pH

2020 ◽  
Vol 275 ◽  
pp. 111203
Author(s):  
Ivan dos Santos Pereira ◽  
Adilson Luís Bamberg ◽  
Rogério Oliveira de Sousa ◽  
Alex Becker Monteiro ◽  
Rosane Martinazzo ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Acid Ph ◽  
Agricultural Use

A Field Study of the Agricultural Use of Sewage Sludge: II. Effect on Soil N and P

1977 ◽  
Vol 6 (4) ◽  
pp. 345-352 ◽  
Author(s):  
K. A. Kelling ◽  
L. M. Walsh ◽  
D. R. Keeney ◽  
J. A. Ryan ◽  
A. E. Peterson
Keyword(s):  
Sewage Sludge ◽  
Field Study ◽  
Soil N ◽  
Agricultural Use

South African Practice in Land Disposal of Sludge, Including Legislation and Health Aspects – An Overview

1983 ◽  
Vol 15 (1) ◽  
pp. 151-155 ◽  
Author(s):  
G Oberholster
Keyword(s):  
Sewage Sludge ◽  
South African ◽  
Short Overview ◽  
Agricultural Use ◽  
Land Disposal

A Short overview of South African practice in the land disposal of sewage sludge is given, the applicable legislation is cited and guidelines for the agricultural use of sewage sludge are introduced.

scholarly journals EFFECT OF THE APPLICATION OF SEWAGE SLUDGE COMPOST ON THE CONTENT AND LEACHING OF ZINC AND COPPER FROM SOILS UNDER AGRICULTURAL USE

2015 ◽  
Vol 16 ◽  
pp. 1-7 ◽  
Author(s):  
Teresa Bowszys ◽  
Jadwiga Wierzbowska ◽  
Paweł Sternik ◽  
Marta Busse
Keyword(s):  
Sewage Sludge ◽  
Sludge Compost ◽  
Sewage Sludge Compost ◽  
Agricultural Use

Potential of activated sludge ozonation

2007 ◽  
Vol 55 (12) ◽  
pp. 181-187 ◽  
Author(s):  
M. Boehler ◽  
H. Siegrist
Keyword(s):  
Sewage Sludge ◽  
Activated Sludge ◽  
Cost Evaluation ◽  
Anoxic Zone ◽  
Excess Sludge ◽  
Solid Retention Time ◽  
Operating Stability ◽  
Agricultural Use ◽  
Sludge Ash ◽  
Sludge Production

The disposal of sewage sludge and the agricultural use of stabilised sludge are decreasing due to more stringent regulations in Europe. An increasing fraction of sewage sludge must therefore be dewatered, dried, incinerated and the ashes disposed of in landfills. These processes are cost-intensive and also lead to the loss of the valuable phosphate resources incorporated in the sludge ash. The implementation of processes that could reduce excess sludge production and recycle phosphate is therefore recommended. Partial ozonation of the return sludge of an activated sludge system significantly reduces excess sludge production, improves the settling properties of the sludge and reduces bulking and scumming. The solubilised COD will also improve denitrification if the treated sludge is recycled to the anoxic zone. However, ozonation partly kills nitrifiers and could therefore lead to a decrease of the effective solid retention time of the nitrifier, thus reducing the safety of the nitrification. This paper discusses the effect of ozonation on sludge reduction, the operating stability of nitrification, the improvement of denitrification and also presents an energy and cost evaluation.

scholarly journals Hydraulic conductivity and soil-sewage sludge interactions

2011 ◽  
Vol 35 (5) ◽  
pp. 1569-1577 ◽  
Author(s):  
Silvio Romero de Melo Ferreira ◽  
Joaquim Teodoro Romão de Oliveira ◽  
Arminda Saconi Messias ◽  
Hannelore Alves e Silva ◽  
Aline Elesbão do Nascimento ◽  
...  
Keyword(s):  
Hydraulic Conductivity ◽  
Sewage Sludge ◽  
Soil Acidity ◽  
Sewage Treatment ◽  
Dry Weight ◽  
Specific Weight ◽  
Statistical Data Analysis ◽  
Agricultural Use ◽  
The City ◽  
Quartz Grains

One of the main problems faced by humanity is pollution caused by residues resulting from the production and use of goods, e.g, sewage sludge. Among the various alternatives for its disposal, the agricultural use seems promising. The purpose of this study was to evaluate the hydraulic conductivity and interaction of soil with sandy-silty texture, classified as Spodosols, from the Experimental Station Itapirema - IPA, in Goiana, state of Pernambuco, in mixtures with sewage sludge from the Mangueira Sewage Treatment Station, in the city of Recife, Pernambuco at rates of 25, 50 and 75 Mg ha-1. Tests were conducted to let water percolate the natural saturated soil and soil-sludge mixtures to characterize their physical, chemical, and microstructural properties as well as hydraulic conductivity. Statistical data analysis showed that the presence of sewage sludge in soils leads to an increase of the < 0.005 mm fraction, reduction in real specific weight and variation in optimum moisture content from 11.60 to 12.90 % and apparent specific dry weight from 17.10 and 17.50 kN m-3. In the sludge-soil mixture, the quartz grains were covered by sludge and filling of the empty soil macropores between grains. There were changes in the chemical characteristics of soil and effluent due to sewage sludge addition and a small decrease in hydraulic conductivity. The results indicate the possibility that soil acidity influenced the concentrations of the elements found in the leachate, showing higher levels at higher sludge doses. It can be concluded that the leaching degree of potentially toxic elements from the sewage sludge treatments does not harm the environment.

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