Environmental impacts of sewage sludge applied to cropland

1986 ◽  
Vol 27 (3-4) ◽  
pp. 239-253 ◽  
Takeshi Goda ◽  
Toru Kuboi ◽  
Kunihiro Fujii
Richard Clapp ◽  
Laura Orlando

2014 ◽  
Vol 69 (12) ◽  
pp. 2407-2416 ◽  
Magdalena Svanström ◽  
Giorgio Bertanza ◽  
David Bolzonella ◽  
Matteo Canato ◽  
Carlo Collivignarelli ◽  

The legislative framework in force in Europe entails restrictive effluent standards for sensitive areas, and quite severe restrictions on the properties of residual sewage sludge, both for landfill disposal and for agricultural use. Several technologies and management strategies have been proposed and applied in wastewater treatment plants to minimise sludge production and contamination. However, their techno-economic and environmental performance has to be carefully evaluated. The ROUTES project, funded within the EU Seventh Framework programme, aims to find new routes for wastewater treatment and sludge management and thereby guide EU members in their future choices. Within this project, the authors have developed and applied a procedure for techno-economic-environmental assessment of new wastewater and sludge processing lines in comparison to reference plants. The reference plants are model conventional plants that experience different types of problems and the new plants are modified plants in which different innovative technologies have been added to solve these problems. The procedure involves a rating of selected technical issues, estimates of operating costs and an assessment of environmental impacts from a life cycle perspective. This paper reports on the procedure and shows examples of results.

Processes ◽  
2019 ◽  
Vol 7 (4) ◽  
pp. 231 ◽  
Renata Xavier Alberico Freitas ◽  
Lara Aguiar Borges ◽  
Handray Fernandes de Souza ◽  
Fernando Colen ◽  
Alex Sander Rodrigues Cangussu ◽  

The generation of large volumes of waste by industrial processes has become an object of study because of the necessity to characterize the composition of residues in order to suggest appropriate treatments and to minimize adverse environmental impacts. We performed analyses of total fixed and volatile solids, moisture, and chemical oxygen demand (COD). We found high organic matter content. We also measured physicochemical characteristics, including corrosivity, reactivity, and toxicity. Sewage sludge showed levels of chloride and sodium above the maximum allowed limits. These data suggest the potential for anaerobic digestion as a treatment option for sewage sludge and for its use as a biofertilizer.

2011 ◽  
pp. 109-112
Brigitta Tóth

The protection of the environment is our common task. All pollution that exposes our soils, plants or the environment – as taken in any proper or extended sense – will appear sooner or later in the food chain and in human beings who are on the top of the food-chain pyramid. The aim of our work is to give a brief overview of the effects of selected industrial wastes on the physiological parameters of corn plants. Sewage sludge and lime sludge were examined. These materials contain lots of useful element for plants (e.g. iron, phosphorus, potassium, zinc). However, their aluminum, chrome and lithium contents are also considerable. The element contents in sewage sludge and the filtrates of lime sludge, as well as the dry matter accumulation and relative chlorophyll contents, were measured. The disadvantageous and advantageous physiological effects of the examined materials were confirmed. The compensation effect of the environment is excluded; however, the neutralization of environmental impacts is not infinite under natural circumstances.

2020 ◽  
Vol 260 ◽  
pp. 109643 ◽  
Raphael Ricardo Zepon Tarpani ◽  
Carolina Alfonsín ◽  
Almudena Hospido ◽  
Adisa Azapagic

2018 ◽  
Vol 36 (1) ◽  
pp. 66-72
José Carlos Lopes ◽  
Allan R Freitas ◽  
Amarilson O Candido ◽  
Luan P Venancio ◽  
Nathália Aparecida B Fávaris

ABSTRACT Industrial and organic residues cause environmental impacts at various levels. However, these residues present potential to correct soil acidity and fertility. Considering the possibility of using these alternative sources, the objective of this study was to analyze the quality of scarlet eggplant seeds produced with the use of industrial waste. The experiment was carried out in a greenhouse. We used scarlet eggplant seeds (Solanum gilo), cv. ‘Verde-Claro’, and the soil was Typic Hapludox. The experimental design was randomized blocks, in a factorial distribution (3x4x5), being three soil variations [(pure soil (S), soil + cattle manure (SE) and, soil + sewage sludge (SL)], four corrective treatments [without correction (C1), limestone (C2), steel slag (C3) and marble powder (C4)], and five periods of seed storage (0, 100, 120, 140 and 160 days). The use of steel slag and marble powder associated with the addition of sewage sludge and cattle manure increased fresh mass of plants, at 40%, and dry mass of plants, at 48%, when compared with the pure soil. After 140 day of storage, negatives effects on the vigor of scarlet eggplant seeds could be noticed.

2019 ◽  
pp. 307-313
Frida Veibäck ◽  
Lena Johansson Westholm

Since the introduction of an EC-directive on stronger demands on covering and lining oflandfills, the Swedish Parliament has adopted new legislation on waste deposition.Within a near future, a large number of landfills in Sweden have to be closed down due tothese stronger demands. Covering of landfills has traditionally been carried out with tillas covering material. The use of till causes depletion of a natural resource and in addition,high costs for transportation might arise. Alternative materials have thus been sought for.Two potential materials are sludge and ash. Their behaviour with regard to leaching is notvery well known and the focus of this work is to further investigate this issue. A pilotscale area on a closed-down part of the Gryta landfill site in Viistenis, Sweden; was partlycovered with composted sewage sludge mixed with mineral soil, partly with ash. The aimwas to find out whether the leachate from the covered areas had to be subject for furthertreatment before being discharged into the recipient. The leachate was analysed fornitrogen and phosphorus. The results from the first three months of the experimentshowed high concentrations of both nitrogen and phosphorus in the leachate, probablydue to a washing effect. It is expected that the nutrient concentrations will decrease in thefuture when the content of nutrients in the covering materials have been washed out andwhen vegetation has been established. Further investigations of the leachate will confirmthis. Based on these findings and the fact that the materials fulfil other requirements forcovering materials, it was concluded that both sludges and ashes could be regarded assuitable materials for a sustainable landfill covering. Further investigations on the subjectare however suggested.

Designs ◽  
2020 ◽  
Vol 4 (3) ◽  
pp. 33
Hossam A. Gabbar ◽  
Davide Lisi ◽  
Mohamed Aboughaly ◽  
Vahid Damideh ◽  
Isaac Hassen

In this paper, a model for a single stage plasma gasification system for marine vessels characterized by significant waste production is proposed. The main objective of the model is to investigate the effects of different feedstock compositions on key parameters, such as electrical power produced and heat recovered. The different types of waste generated onboard are described along with their environmental impacts. Specific attention is given to solid wastes, sewage sludge and plastic wastes as potential feedstock. Their average generation, proximate and ultimate analysis are defined, as input to the process model. The process assumptions used in the simulation model are illustrated. The system model is divided into five units: the pre-treatment unit; the gasification unit; the syngas cleaning unit; the energy conversion unit; and the heat recovery unit. Four operational scenarios are investigated to consider several variations of composition of the main feedstock. From the results of the simulations, the system model shows good feedstock flexibility, and the possibility of operating in net electricity gain conditions. The cold gas efficiency of the process is also assessed and its maximum value is obtained for the highest concentrations of sewage sludge (33.3%) and plastic (16.7%). Other parameters investigated are the combustion temperature, sorbent consumption in the cleaning process, feedstock and syngas lower heating value LHV.

2021 ◽  
Vol 756 ◽  
pp. 144050
Minghao Shen ◽  
Xiangdong Zhu ◽  
Hua Shang ◽  
Fei Feng ◽  
Yong Sik Ok ◽  

2021 ◽  
Dilvin Çebi ◽  
Melih Soner Celiktas ◽  
Hasan Sarptaş

Abstract In pursuit of establishing a circular economy, waste-to-energy approach is gaining increasing attention. In this manner valorization of sewage sludge constitutes a critical importance due to generation in high quantities, difficulties in disposal and associating environmental impacts. Hydrothermal carbonization (HTC) is a relatively recent, however acclaimed method for sewage sludge management and valorization due to process compliance with sludge characteristics. In this review, research studies are evaluated under the categorization of application fields of sludge derived HTC products such as solid fuel production, gas production, soil remediation, nutrient recovery, water treatment and energy storage. Research findings are compiled and a network mapping is employed for the visualization of the current situation and correlation in respective fields. The potential of HTC for sewage sludge valorization and future projections concerning available techniques are assessed within the context of circular economy.

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