Studies on land application of sewage sludge and its limiting factors

Wang, Xin; Chen, Tao; Ge, Yinghua; Jia, Yongzhong

doi:10.1016/j.jhazmat.2008.03.046

Cited by 160 publications

(92 citation statements)

References 16 publications

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“…Sludge must therefore be recycled to soil where edible crops grown with caution, to avoid causing heavy metals contamination to agricultural products. In other words, sludge is more suitable for the amendment for forestry land, grassland and plant nurseries, where food chain contamination with heavy metal is not a concern, rather than edible crops (Wang et al, 2008).…”

Section: Influence Of Sludge Amendment On the Uptake Of Heavy Metals mentioning

confidence: 99%

Achilles heel of environmental risk from recycling of sludge to soil as amendment: A summary in recent ten years (2007–2016)

Liu

2016

Waste Management

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a b s t r a c tRecycling sludge as a soil amendment has both positive and negative effects because of its enrichment in both nutrients and contaminants. So far, the negative effect has to be extensively investigated that the severities of different types of contaminants also remain unclear. The environmental behavior and risk of organic contaminant and pharmaceuticals, heavy metal and salt as well as pathogenic microorganisms brought by sludge amendment are summarized and discussed here. Organic contaminants and pharmaceuticals are typically found at low concentrations in sludge, the risks from sludge-amended soil decrease over time owing to its biodegradability. On the other hand, application of sludge generally increases soil salinity, which may cause physiological damage to plants grown in sludge-amended soil. In some extent, this negative effect can be alleviated by means of dilution; however, greater attention should be paid to long term increasing possible risk of eutrophication. Heavy metal (particularly of mobile heavy metals, such as Cd) with high concentrations in sludge and soil receiving considerable sludge can cause its incremental abundance in soil and crop contamination, further posing risks to humans, but most cases showed that there remained not excessive in heavy metal caused by sludge amendment. It is worth noting that increasing soil organic matter content may reduce transfer of heavy metal from soil to crops, but not restrict its uptake by crops at all. Combined literature together, it is summarized that heavy metal becomes a relatively severe bottleneck in recycling of sludge as soil amendment due to its nonbiodegradability and potential damage to health by adventuring contamination from agricultural products. Particular attention should therefore be paid to long term monitoring the change of heavy metals concentration in sludge amended soil.

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Section: Influence Of Sludge Amendment On the Uptake Of Heavy Metals mentioning

confidence: 99%

Achilles heel of environmental risk from recycling of sludge to soil as amendment: A summary in recent ten years (2007–2016)

Liu

2016

Waste Management

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“…Agriculture has become an alternative destination for the sizeable quantities of sewage sludge (SS) generated, due to the presence of plant nutrients in organic waste (Melo et al, 2007;Wang et al, 2008). However, its use can also harm the soil-plant system, due principally to an imbalance in nutrients in this waste (Bertoncini et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Composting sewage sludge with green waste from tree pruning

Moretti¹,

Bertoncini²,

Abreu-Junior³

2015

Sci. agric. (Piracicaba, Braz.)

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ABSTRACT:Sewage sludge (SS) has been widely used as organic fertilizer. However, its continuous use can cause imbalances in soil fertility as well as soil-water-plant system contamination.The study aimed to evaluate possible improvements in the chemical and microbiological characteristics of domestic SS, with low heavy metal contents and pathogens, through the composting process. Two composting piles were set up, based on an initial C/N ratio of 30:1, with successive layers of tree pruning waste and SS. The aeration of piles was performed by mechanical turnover when the temperature rose above 65 ºC. The piles were irrigated when the water content was less than 50 %. Composting was conducted for 120 days. Temperature, moisture content, pH, electrical conductivity (EC), carbon and nitrogen contents, and fecal coliforms were monitored during the composting. A reduction of 58 % in the EC of the compost (SSC) compared with SS was observed and the pH reduced from 7.8 to 6.6. There was an increase in the value of cation exchange capacity/carbon content (CEC/C) and carbon content. .In SSC, helminth eggs were eliminated, making application sustainable for agriculture purposes.

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“…Land application is currently more sustainable than above methods for the final disposal of sewage sludge. Because of its organic matter content, plant-available nutrients and its low-cost, agricultural application of sewage sludge has become an economical, efficient, and increasingly popular Soil properties and microbial ecology of a paddy field after repeated applications of domestic and industrial sewage sludges method (Asagi and Ueno 2008;Singh and Agarwal 2008;Wang et al 2008;Mahapatra et al 2013). About 60% of sewage sludge produced in the US are reused by application to agricultural land (National Research Council 2002).…”

Section: Introductionmentioning

confidence: 99%

Soil properties and microbial ecology of a paddy field after repeated applications of domestic and industrial sewage sludges

Liu

Wang

et al. 2017

Environ Sci Pollut Res

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The effects of repeated application of two types of sewage sludge, domestic and industrial (petrochemical, PSS) sludges, into paddy fields over a 5-year period on the soil properties and microbial ecology were studied and compared with conventional NPK fertilizer application. Soil organic matter and total nitrogen contents were significantly higher in the two sludge treatments than that in fertilized plots after 5 years. Soil concentrations of potentially toxic metals were low after 5 years of both sludge treatments, but the polycyclic aromatic hydrocarbons (PAHs) showed differences between the two sludge types. Concentrations of high-molecularweight PAHs were significantly higher (p < 0.05) in the petrochemical sludge treatment than the domestic sludge treatment or the fertilizer control, although the total concentrations of 16 types of PAH in the petrochemical sludge treatment were only slightly higher than in the domestic sludge treatment and the control. The biological toxicity of soil dimethyl sulfoxide extracts from the petrochemical sludge treatment was also significantly higher (p < 0.05) than those from the fertilizer control and the domestic sludge treatment when evaluated using Photobacterium phosphoreum T3. Both types of sewage sludge increased soil microbial activity, but only the petrochemical sludge led to enrichment with specific PAH degraders such as Mycobacterium, Nocardioides, and Sphingomonas.

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Studies on land application of sewage sludge and its limiting factors

Cited by 160 publications

References 16 publications

Achilles heel of environmental risk from recycling of sludge to soil as amendment: A summary in recent ten years (2007–2016)

Achilles heel of environmental risk from recycling of sludge to soil as amendment: A summary in recent ten years (2007–2016)

Composting sewage sludge with green waste from tree pruning

Soil properties and microbial ecology of a paddy field after repeated applications of domestic and industrial sewage sludges

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