sewage sludge Articles
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Insurance regarding radical uncertainty: approaches in France and in Germany for sewage sludge land spreading
Up to now, economic literature regarding the product safety has studied foreseeable risks that are known by producers. However, the literature has not analysed which liability rule and insurance schemes are efficient for radical uncertainty. This paper addresses this topic through insurance schemes in France and Germany for sewage sludge spreading. Section 1 gives an overview of economic ...
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Ammonia sanitisation of sewage sludge using urea
The aim of the study was to develop a simple, low-cost treatment for sewage sludge using urea as a sanitising agent. Sewage sludge was spiked with Enterococcus faecalis and Salmonella typhimurium, treated with 0.5, 1, 1.5 and 2% w/w urea at laboratory scale, and the viability was monitored during 4 months of storage at 4, 10 and 22 °C (only 0.5%). A linear relationship was ...
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Recovery of phosphorus and aluminium from sewage sludge ash by a new wet chemical elution process (SESAL-Phos-recovery process)
The potential of a new wet chemical process for phosphorus and aluminium recovery from sewage sludge ash by sequential elution with acidic and alkaline solutions has been investigated: SESAL-Phos (sequential elution of sewage sludge ash for aluminium and phosphorus recovery). Its most innovative aspect is an acidic pre-treatment step in which calcium is leached from the sewage sludge ash. Thus ...
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Continuous Pyrolysis Facility for Sewage Sludge Treatment
The amount of sewage sludge is catastrophically increased in the latest few decades due to functioning of the municipal sewage treatment facilities. Dry sewage sludge contains 70-90% of the organic substances and 10-30% of the inorganic substances, which are dangerous for human health in case of inappropriate utilization. The continuous pyrolysis technology presents the unique sewage sludge ...
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Brno (CZE) Municipal Plants - Case Study
Digester: 4 x 4.000 m³ sewage sludge digestion Scope of services: sewage sludge digester agitators, gas equipment, desulphurization Start-up: ...
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Overview of legislation on sewage sludge management in developed countries worldwide
The need to apply innovative technologies for maximizing the efficiency and minimizing the carbon footprint of sewage treatment plants has upgraded sewage sludge management to a highly sophisticated research and development sector. Sewage sludge cannot be regarded solely as ‘waste’; it is a renewable resource for energy and material recovery. From this perspective, legislation on sewage ...
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Schladming (AUT) Municipal Plants - Case Study
Digester: 2 x 600 m³ sewage sludge digestion Scope of services: sewage sludge digester agitator, gas storage, gas equipment, heat exchanger Start-up: ...
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Review on municipal sewage sludge management in Turkey and Europe
The main purpose of this paper is to point out the development of the sewage sludge quantity in Turkey and in Europe by reviewing different studies to detect trends, which are characterised by legal framework and different disposal routes. Additionally, it should be elaborated if an increase in the amount of sewage sludge has to be expected and which reasons are indicated. Because of the ...
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Bio-plastic (poly-hydroxy-alkanoate) production from municipal sewage sludge in the Netherlands: a technology push or a demand driven process?
Valorisation of components from municipal ‘waste’ water and sewage sludge gets more and more attention in order to come to a circular economy by developing an efficient ‘waste’ to value concept. On behalf of the transition team ‘Grondstoffenfabriek’ (‘Resource factory’) a preliminary research was performed for all the Dutch water boards to assess the technical and economical feasibility of ...
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The effect of lime-dried sewage sludge on the heat-resistance of eco-cement
The treatment and disposal of sewage sludge is a growing problem for sewage treatment plants. One method of disposal is to use sewage sludge as partial replacement for raw material in cement manufacture. Although this process has been well researched, little attention has been given to the thermal properties of cement that has had sewage sludge incorporated in the manufacturing process. This ...
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ARA Meiningen (AUT) Municipal Plants - Case Study
Digester: 1 x 4.000 m³ sewage sludge digestion Scope of services: sewage sludge digester agitator, flare, heat exchanger, gas equipment Start-up: ...
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Moisture measurement with M-Sens 2 Sensor selection with Easy-Tester - Case Study
Application During the process of cement production cement powder is burnt to clinker. This process takes place in a kiln. For the operation of this kiln different combustibles are used, amongst others sewage sludge. The heating value of sewage sludge depends on its degree of dryness. Sewage sludge normally has a high moisture content when it is delivered to cement plants, therefore it must be ...
By ENVEA
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Investigation of a direct melting dehydrated sewage sludge pilot plant
A direct melting dehydrated sewage sludge furnace was tested to obtain the basic operating parameters. Observation of particles (fly ash and deposited particulates) inside the pilot plant was performed to determine the particle properties. The results showed that dehydrated sewage sludge could be directly melted at a temperature of 1400?C with stable combustion. With regard to the fly ash, the ...
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Chemical changes in an Oxisol cultivated with maize (Zea mays, L.) after six years disposal of sewage sludge
Sewage sludge is composed of predominantly organic matter and can be used to improve soil characteristics, such as fertility. Therefore, its application in agriculture is an adequate alternative for its final disposal. However, there is a lack of information on its long–term effects on soil changes in tropical areas. Thus, the objectives of this study were to determine: (a) the effect of sewage ...
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Characteristics and potential uses of sewage sludge in the commercial capital of Bangladesh
Based on contrasting properties, sewage sludge can be co-recycled in order to take simultaneously the best profit and minimise environmental pollution. The present study was conducted to assess the physical and chemical properties of sewage sludge generated from different sources in the commercial capital of Bangladesh and on the basis of these characteristics a variety of ways had been fixed to ...
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Pyrobustor - A Proven,Small-Scale, Biosolids-to-Energy Solution
27 municipalities in southern Germany set up a special-purpose entity called KSV GmbH for the specific purpose of disposing regional sewage sludge. The goals of this project were two-fold; eliminate the expensive cost of transporting sewage sludge over long distances and avoid incalculable costs by outsourcing sludge disposal. To achieve this, KSV GmbH installed the Pyrobustor® at the ...
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Ultrasonic impact on bacterial population in sewage sample
Nine samples of sewage sludge from different paper mills of New Delhi were treated with ultrasonic waves of two different frequencies, viz., 35 kHz and 130 kHz for different time periods (5, 10, 20 and 30 min). Treated sewage sludge was then evaluated with different parameters, viz., Chemical Oxygen Demand(COD), Biochemical Oxygen Demand (BOD), Total Nitrogen, Total Phosphorus, Total Ammonia and ...
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Grosuplje (SLO) Municipal Plants - Case Study
Digester: 2 x 635 m³ sewage sludge digestion Scope of services: sewage sludge digester agitator, flare, heat exchanger, gas storage, gas equipment Start-up: ...
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The behaviour of phosphorus and heavy metals in sewage sludge ashes
The effect of the combustion atmosphere and the additives (CaO and HCl) on the behaviour of phosphorus and heavy metals during sewage sludge combustion was investigated. The results demonstrated that the reduction combustion promoted the vapourisation of phosphorus and heavy metals during sewage sludge combustion. Moreover, the concentrations of phosphorus and heavy metals in the bottom ash ...
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Pyrolysis properties of municipal sewage sludge with ZnCl2 activation under the N2 atmosphere
The municipal sewage sludge with ZnCl2 activation was pyrolysed to obtain useful porous adsorbents. The thermogravimetric analysis and FTIR methods were used to work out the properties of dried sewage sludge with ZnCl2 activation from the Changsha secondary wastewater-treatment plant. The experimental results showed that three stages of weight loss were observed under the heating rates of ...
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