Study on Solidification Technology and Safety Assessment for Sewage Sludge

2011 ◽  
Vol 460-461 ◽  
pp. 768-773
Author(s):  
Jia Ying Sun ◽  
Yi Dong Xu ◽  
Jian Geng ◽  
Shu Min Ye
Keyword(s):  
Heavy Metal ◽  
Sewage Sludge ◽  
Asphalt Mixture ◽  
National Standard ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Maximum Value ◽  
Metal Contents ◽  
Road Performance ◽  
Solidification Technology

In the light of heavy metal contents such as Pb and Zn in municipal sewage sludge exceeding the allowed maximum value of discharge wastes in China, new solidification technology was taken to solidify sewage sludge; its effect and safety were studied as well. The experiment results showed that the 28 days compressive strength of sewage sludge concretion were more than 40 MPa by this solidification method and a relative excellent advantage of road performance properties such as residual Marshall values and rutting resistance for asphalt mixture prepared with sewage sludge concretion. Meanwhile, its solidified heavy metal infusion met the requirements of the national standard, in other words, heavy metal ions receiving an effective bound and stable solidification.

scholarly journals Impact of Low-Dose Municipal Sewage Sludge Compost Treatments on the Nutrient and the Heavy Metal Contents in a Chernozem Topsoil Near Újkígyós, Hungary: A 5-Year Comparison

2020 ◽  
Vol 13 (1-2) ◽  
pp. 25-30 ◽  
Author(s):  
Zsuzsanna Ladányi ◽  
Katalin Csányi ◽  
Andrea Farsang ◽  
Katalin Perei ◽  
Attila Bodor ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Sewage Sludge ◽  
Soil Properties ◽  
Low Dose ◽  
Nutrient Content ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Sludge Compost ◽  
Sewage Sludge Compost ◽  
Metal Contents

AbstractAgriculture is one of the major fields, where sewage sludge can be used. Its high nutrient content can contribute to the improvement of important soil properties, such as nutrient content, water balance and soil structure. However, sewage sludge may contain hazardous components, such as pathogens and pollutants. Therefore, it is important to monitor the effects of its field application. In this paper, we assessed the impacts of two low-dose (2.5 m3/ha) municipal sewage sludge compost applications (in 2013 and in 2017) in a 5.6 ha arable land in southeast Hungary (near Újkígyós), located in the Hungarian Great Plain. The nutrient and the heavy metal contents in the upper soil layer (0-30 cm) of the studied Chernozem soils were compared between two sampling campaigns in 2013 (before the compost applications) and in 2018 (after the compost applications). Basic soil properties (pH, salinity, humus content, carbonate content, Arany yarn number) complemented with nutrient content (K2O, P2O5, NO2+ NO3) and heavy metal content (Cd, Co, Cr, Cu, Ni, Pb and Zn) analyses were performed. The results show that no significant change can be noticed in the baseline parameters over the 5-year period. The slight increase in the P2O5, NO2+ NO3 content is closely related to the beneficial effects of the sewage sludge deposition. The soil-bound heavy metal load did not increase significantly as a result of the compost treatments, only nickel showed a slight increase in the topsoil. In all cases the heavy metal concentrations did not reach the contamination thresholds set by Hungarian standards. The results provided positive evidences proving that low dose municipal sewage sludge compost disposal on agricultural land is safe, and can be considered as a sustainable soil amendment for agriculture in compliance with legal requirements.

On the contribution of background sources to the heavy metal content of municipal sewage sludge

2001 ◽  
Vol 43 (2) ◽  
pp. 67-74 ◽  
Author(s):  
M. Koch ◽  
W. Rotard
Keyword(s):  
Heavy Metal ◽  
Drinking Water ◽  
Sewage Sludge ◽  
Metal Content ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Faecal Excretion ◽  
Soil Application ◽  
Metal Load

The role of human excretion, drinking water, and deposition as a source of heavy metals to municipal sewage was investigated and compared with common levels in sludge for soil application. These sources contributed more than half of the copper (Cu), zinc (Zn), and lead (Pb) content of municipal sewage sludge for soil application, while other sources dominated the fluxes of chromium (Cr) and cadmium (Cd). Drinking water was an important source for Cu and Zn. Deposition contributed about 40% to the Pb flux. Faecal excretion commonly caused less than 10% of the heavy metal load, while urinary excretion was here a negligible heavy metal source.

scholarly journals The effect of cellulose production waste and municipal sewage sludge on biomass and heavy metal uptake by a plant mixture

2018 ◽  
Vol 25 (31) ◽  
pp. 31101-31112 ◽  
Author(s):  
Jacek Antonkiewicz ◽  
Robert Pełka ◽  
Marta Bik-Małodzińska ◽  
Grażyna Żukowska ◽  
Katarzyna Gleń-Karolczyk
Keyword(s):  
Heavy Metal ◽  
Sewage Sludge ◽  
Metal Uptake ◽  
Production Waste ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Heavy Metal Uptake ◽  
Cellulose Production ◽  
Plant Mixture

A New Brick Prepared from Municipal Sewage Sludge and Shale

2011 ◽  
Vol 374-377 ◽  
pp. 18-23 ◽  
Author(s):  
Hai Bo Wang ◽  
Zi Zeng Lin ◽  
Zhong Yi He
Keyword(s):  
Sewage Sludge ◽  
Unconfined Compressive Strength ◽  
Experimental Tests ◽  
Optimum Moisture Content ◽  
National Standard ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Test Results ◽  
Leaching Toxicity ◽  
Heat Preservation

Series of experimental tests on the forming technique, sintering technique, performance and effectiveness of a new fired brick by mixing municipal sewage sludge and shale are carried out. Test results show that adding sludge properly in the process of manufacture shale fired common brick is feasible. Along with increase of sludge content, the compacting of uniformity of unburned brick decreased and its porosity increased. When shale-sludge mixtures were calcined, the heavy metal solidified, the ignition lost and organic substance volatilized that reduced the unconfined compressive strength (UCS) of the brick and improve its thermal insulation ability. The phase composition and leaching toxicity of sewage sludge-shale baked brick can be up to national standard. Good quality brick can be produced by blending mixture with the optimum moisture content (OMC) 18.0%-20.0%, drying at 105°C and sintering at 960°C. With all being considered in manufacturing brick, the content of sewage sludge shall be controlled within 9.0% that can make UCS of the new brick reach MU10 criterion and it has a superior heat preservation effect to normal brick from clay or shale alone.

scholarly journals Hemp-Based Phytoaccumulation of Heavy Metals from Municipal Sewage Sludge and Phosphogypsum Under Field Conditions

Agronomy ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 907
Author(s):  
Dariusz Zielonka ◽  
Wiesław Szulc ◽  
Monika Skowrońska ◽  
Beata Rutkowska ◽  
Stefan Russel
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Sewage Sludge ◽  
Field Study ◽  
Bioconcentration Factor ◽  
Biomass Yield ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Dose Dependent ◽  
Generative Organs

The aim of this study was to evaluate the ability of three hemp cultivars to accumulate heavy metals under sewage sludge (SS) and phosphogypsum (PG) application. The field study was carried out from 2014 to 2016 on Luvisol (loamy sand) in Poland. The experiment scheme included five treatments—T0: the control without fertilization, T1: 170 kg N (nitrogen) ha−1 from sewage sludge, T2: 170 kg N ha−1 from sewage sludge and 100 kg ha−1 of phosphogypsum, T3: 170 kg N ha−1 from sewage sludge and 500 kg ha−1 of phosphogypsum, and T4: 170 kg N ha−1 from sewage sludge and 1000 kg ha−1 of phosphogypsum. It was found that the application of municipal sewage sludge enriched the soil with the bioavailable forms of heavy metals to the greatest extent and contributed to the highest increase in their contents in vegetative and generative organs of hemp plants. These parameters showed a phosphogypsum dose-dependent decline, which could hinder the phytoextraction process. The greatest extractions of heavy metal(loid)s (HMs) from the soil treated with SS and PG were achieved by the Tygra variety, which had the highest bioconcentration factor (BCF) and biomass yield.

Heavy Metal Speciation of Sewage Sludge and its Phytotoxic Effects on the Germination of Three Plant Species

2011 ◽  
Vol 347-353 ◽  
pp. 1022-1030 ◽  
Author(s):  
Mian Hao Hu ◽  
Ju Hong Yuan
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Seed Germination ◽  
Sewage Sludge ◽  
Metal Speciation ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Industrial Sludge ◽  
Metal Concentrations ◽  
Aqua Regia

The environmental impact of sewage sludges depends on the availability and phytotoxicity of their heavy metal. The influence of representative sludges (industrial sludge and municipal sludge) on the availability of heavy metals, and their effects on seed germination were compared. The total heavy metal concentrations were below the maximum permitted for land applied waste and the differences among them were small. The DTPA-extracted metal concentrations were significant different. The sum of all the fractions in the slugdes was close to the total metal content as determined by extraction with aqua regia. In addition, there were significant differences in the chemical forms of the heavy metals (Hg, Ni, As, Cd, Cu, Cr, Zn, Pb) by the sequential extraction system. The two different sludges also affected seed germination and root elongation in different ways. The most serious adverse effects were caused by the municipal sewage sludge extract.

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