Effects of land utilization of sludge compost on wheat and the risk of heavy metals

2014 ◽  
Author(s):  
Keyi Huang ◽  
Huanjia Liu ◽  
Hongzhong Zhang ◽  
Jihong Zhao ◽  
Mingbao Wei ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Land Utilization ◽  
Sludge Compost

scholarly journals PHYSICAL-CHEMICAL CHARACTERIZATION OF SOILS TREATED WITH SEWAGE SLUDGE COMPOST

2010 ◽  
Vol 2 (5) ◽  
pp. 87-92
Author(s):  
Milda Radžiūtė ◽  
Audronė Matusevičiūtė
Keyword(s):  
Heavy Metals ◽  
Water Treatment ◽  
Sewage Sludge ◽  
Organic Waste ◽  
Organic Fertilizer ◽  
Chemical Characterization ◽  
Waste Dump ◽  
Sludge Compost ◽  
Sewage Sludge Compost

Sewage dump is the main organic waste component accumulating in water treatment companies, and therefore the utilization of dump remains a burning issue. Fertilization is the most popular and cheapest way of using sewage dump a part of which is intended for agriculture in most European countries for composting purposes. Sewage dump or its compost are suitable for fertilizing the upper layers of the soil in cases the concentration of heavy metals is not greater than sanitarian standards can tolerate. The examinations were carried out using different waste dump rates from Vilnius water treatment facility in willow (Salix viminalis) grown cultivated fields. The analysis of the soil was executed after one and two years following the fertilization process. The obtained results indicate that waste dump is a valuable organic fertilizer which contains small amounts of heavy metals. Separate heavy metals migrate from sewage sludge compost to plants differently. It was noted that the concentration of heavy metals in willows was greater (except for Pb and Cd) than that in the soil.

Stabilization of heavy metals in sewage sludge composting process

2001 ◽  
Vol 44 (10) ◽  
pp. 95-100 ◽  
Author(s):  
K.-Y. Chiang ◽  
S.-D. Yoi ◽  
H.N. Lin ◽  
K.-S. Wang
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Total Concentration ◽  
Physicochemical Characteristics ◽  
Limit Values ◽  
Sludge Compost ◽  
Composting Process ◽  
Agricultural Applications ◽  
Maturation Rate ◽  
Sludge Composting

This study investigated the stabilization of heavy metals in a sewage sludge composting process using kaoline addition. The results indicate that the temperature increased rapidly to the thermophilic phase (>55°C) at day 1. The additives enhanced the rate of biodegradation and microbial activity during the co-composting process. The changes in pH (ranging from 8 to 8.5) and electrical conductivity (EC) (≤3 mS/cm) were in compliance with the best conditions during the co-composting process. The C/N ratio was determined in each co-compost sample as an indicator of the co-compost maturity. From the end product of the co-compost experiment, changes in the ratios indicate that the additives promote the co-compost maturation rate. Based on the physicochemical characteristics of the co-compost, the potential use for sewage sludge resource recovery as manure is suggested. The total concentrations of Pb, Cd, Cr, Cu, and Zn in the co-compost product were far below the limit values for agricultural use. The leachability of Pb, Cu, and Cr decreased with increasing co-composting time. That is, the kaoline additive has an inhibitory capacity for leaching heavy metals. The Cd concentrations in the sludge compost were below the detection limits. Because the total concentration of Zn was high in the sludge compost and most soluble Zn was leachable, the leachability of Zn ranged from 25% to 29%. As a result of the physicochemical characteristics and heavy metal stabilization, the selected additive was shown to improve the sewage sludge compost quality and provide information for agricultural applications.

Trend of heavy metals in sewage sludge compost and quality as the fertilizer

2006 ◽  
Vol 52 (2) ◽  
pp. 254-254
Author(s):  
Shin-ichiro Mishima ◽  
Akira Kawasaki ◽  
Mitsuo Komada
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Sludge Compost ◽  
Sewage Sludge Compost

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

2012 ◽  
Vol 209-211 ◽  
pp. 1245-1252
Author(s):  
Zheng Zhong Zeng ◽  
Xiao Li Wang ◽  
Yu Pan ◽  
Zhong Ren Nan
Keyword(s):  
Heavy Metals ◽  
Fly Ash ◽  
Sewage Sludge ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Unstable State ◽  
Land Utilization ◽  
Major Barrier ◽  
Exchangeable Fraction ◽  
State Content

The land use has become the international mainstream and the favorable direction to dispose the municipal sewage sludge in recent years. The heavy metals, however, are the major barrier that limit the land utilization. Batch aerobic composting experiments were conducted to investigate the effect of composting and co-composting with fly ash on the shape of the heavy metals (Ni & Cd) in sludge by using the sawdust to regulate the C/N ratio. Results have shown that co-composting with fly ash can significantly change Ni & Cd species distribution, leading unstable state content of Ni lower than composting only. However, the result is not as good as composting only in terms of Cd. At the same time the fly ash dosage equaling 14% of the dry sludge mass was the optimized quantity to guarantee the lowest exchangeable fraction amount of the two heavy metals.

Particle Size Effects on Uptake of Heavy Metals from Sewage Sludge Compost Using Natural Zeolite Clinoptilolite

2002 ◽  
Vol 250 (1) ◽  
pp. 1-4 ◽  
Author(s):  
Antonis A. Zorpas ◽  
Inglezakis Vassilis ◽  
Maria Loizidou ◽  
Helen Grigoropoulou
Keyword(s):  
Heavy Metals ◽  
Particle Size ◽  
Sewage Sludge ◽  
Size Effects ◽  
Natural Zeolite ◽  
Sludge Compost ◽  
Particle Size Effects ◽  
Sewage Sludge Compost

Speciation Analysis of Heavy Metals in Electroplating Sludge and the Effect of Composting

2011 ◽  
Vol 396-398 ◽  
pp. 1975-1979
Author(s):  
Jin Long Yan ◽  
Gui Xiang Quan ◽  
Cheng Ding
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
High Temperature ◽  
Speciation Analysis ◽  
The Other ◽  
Forced Ventilation ◽  
Sludge Compost ◽  
Metal Contents ◽  
Electroplating Sludge ◽  
Agricultural Use

Electroplating sludge is always listed as hazardous waste due to the high content of heavy metals. The most economical and available way for disposal of sludge is soil application of sludge compost, and the major limitation in agriculture utilization is the total heavy metal contents and their bioavailability to the soil–plant system. The effect of composting on the speciation of heavy metals in an electroplating sludge was studied, and the potential environmental impacts were also assessed. The electroplating sludge was composted with rice straw and sawdust by static aerobic method at high temperature with forced ventilation. Results showed that the exchangeable species of copper and nickel were significantly decreased after the compost procedure, and the other kinds of species were increased differently. Data in this research indicated that composting can reduce the activity of heavy metals to some extent to achieve the agricultural use.

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