scholarly journals Application of the anaerobic co-digestion method to sewage sludge treatment toward recover green energy and utilize nutrients for agriculture

2021 ◽  
Vol 926 (1) ◽  
pp. 012097
Author(s):  
T Tran ◽  
L T A Hong ◽  
L V Tan
Keyword(s):  
Wastewater Treatment ◽  
Sewage Sludge ◽  
Wastewater Treatment Plants ◽  
Calorific Value ◽  
Green Energy ◽  
Organic Fertilizers ◽  
Treatment Needs ◽  
Digestion Method ◽  
Sludge Treatment ◽  
Urban Wastewater Treatment

Abstract Sewage sludge after urban wastewater treatment needs to be treated intelligently to get maximum benefits. This study proposes a method of anaerobic co-degradation of agricultural sludge and residues to both solve environmental problems and recover a large amount of biogas and organic fertilizers. The results show the potential for energy recovery from biogas and impact assessment of the application directly on the rice fields. It is estimated that biogas recovery from sludge treatment from wastewater treatment plants gives a calorific value of about 76 × 106 MJ/year. Results from the trial crop showed that fertilizer shows good supportability to the plant. The results show that the fertilizer from sewage sludge can be reduced and replaced by 50% to 100% of the number of chemical fertilizers but still give the same yield. The data show that the anaerobic co-digestion method is a suitable method for sludge treatment. The dual objective is to provide valuable benefits from recovered biogas and anaerobic digestion products.

Production of fuels on the basis of sewage sludge through conditioning using high calorific value fractions

2008 ◽  
Vol 3 (1) ◽  
Author(s):  
Karl-Georg Schmelz ◽  
Anja Reipa ◽  
Hartmut Meyer
Keyword(s):  
Sewage Sludge ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Calorific Value ◽  
Fluidised Bed ◽  
Sludge Treatment ◽  
Heating Value ◽  
Fine Coal ◽  
Used Cars ◽  
Plastic Components

Emschergenossenschaft and Lippeverband operate 59 wastewater treatment plants which produce approx. 100,000 Mg TS of sewage sludge each year. Using sludge pressure pipelines, about 60 % of this sludge are transported to the central sludge treatment plant in Bottrop. The digested sludges are conditioned using fine coal and polymers and are dewatered using membrane filters. By adding coal, the heating value of the sludge is raised which enables autothermal combustion of the dewatered sludges in fluidised bed furnaces at the central sludge treatment plant. In order to replace coal, a fossil fuel, as conditioning agent, experiments were conducted using alternative materials with high heating values. The addition of shredder fluff agglomerates proved to be particularly successful. Shredder fluff agglomerates are a residue from the recycling of used cars and are generated in a multistage process (e.g. Volkswagen-SiCon Process) by separating the light shredder fraction (plastic components etc.) from the total shredder fluff. The fibrous material is outstandingly suitable for improving the dewaterability and for sufficiently raising the heating value of the dewatered sludge in order to enable autothermal combustion. Since first experiments showed very positive results, a full-scale long-term test-run will take place in 2007.

Occurrence of pharmaceutical active compounds in sewage sludge from two urban wastewater treatment plants and their potential behaviour in agricultural soils

2021 ◽  
Author(s):  
Sofia Silva ◽  
João Rodrigues ◽  
Rosário Coelho ◽  
António Martins ◽  
Eugénia Cardoso ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Sewage Sludge ◽  
Crop Yields ◽  
Agricultural Soils ◽  
Wastewater Treatment Plants ◽  
Urban Wastewater ◽  
Active Compounds ◽  
Intensive Farming ◽  
Urban Wastewater Treatment

Sewage sludge/biosolids are widely used in intensive farming to maintain fertility and enhance crop yields. Therefore, characterization of these matrices is necessary to ensure their safe use, especially regarding the...

scholarly journals Coupling Hydrothermal Carbonization with Anaerobic Digestion for Sewage Sludge Treatment: Influence of HTC Liquor and Hydrochar on Biomethane Production

Energies ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 6262 ◽  
Author(s):  
Roberta Ferrentino ◽  
Fabio Merzari ◽  
Luca Fiori ◽  
Gianni Andreottola
Keyword(s):  
Wastewater Treatment ◽  
Anaerobic Digestion ◽  
Sewage Sludge ◽  
Wastewater Treatment Plants ◽  
Hydrothermal Carbonization ◽  
Digested Sludge ◽  
Sludge Treatment ◽  
Secondary Sludge ◽  
Sewage Sludge Treatment ◽  
Biomethane Production

The present study addresses the coupling of hydrothermal carbonization (HTC) with anaerobic digestion (AD) in wastewater treatment plants. The improvement in biomethane production due to the recycling back to the anaerobic digester of HTC liquor and hydrochar generated from digested sludge is investigated and proved. Mixtures of different compositions of HTC liquor and hydrochar, as well as individual substrates, were tested. The biomethane yield reached 102 ± 3 mL CH4 g−1 COD when the HTC liquor was cycled back to the AD and treated together with primary and secondary sludge. Thus, the biomethane production was almost doubled compared to that of the AD of primary and secondary sludge (55 ± 20 mL CH4 g−1 COD). The benefit is even more significant when both the HTC liquor and the hydrochar were fed to the AD of primary and secondary sludge. The biomethane yield increased up to 187 ± 18 mL CH4 g−1 COD when 45% of hydrochar, with respect to the total feedstock, was added. These results highlight the improvement that the HTC process can bring to AD, enhancing biomethane production and promoting a sustainable solution for the treatment of the HTC liquor and possibly the hydrochar itself.

scholarly journals A GIS-Based Model to Assess the Potential of Wastewater Treatment Plants for Enhancing Bioenergy Production Within the Context of the Water–Energy Nexus

Energies ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2838
Author(s):  
Francesca Valenti ◽  
Attilio Toscano
Keyword(s):  
Wastewater Treatment ◽  
Sewage Sludge ◽  
Wastewater Treatment Plants ◽  
Current Knowledge ◽  
Renewable Energy Sources ◽  
Treatment Plant ◽  
Green Energy ◽  
Green Economy ◽  
Bioenergy Production ◽  
Emilia Romagna Region

The necessity of developing renewable energy sources has contributed to increasing interest in developing the anaerobic digestion for producing biomethane since it both provides green energy and reduces disposal treatment. In this regard, to assure efficient water utilization by finding alternative water sources, sewage sludge collected from the wastewater treatment plant (WWTP) was recently investigated because it could represent a suitable resource for producing biomethane within the context of a circular economy. Therefore, this study aims at improving the current knowledge on the feasibility of biomethane production from sewage sludge by optimizing the logistic-supplying phase. In this regard, a GIS-based model was developed and applied to the Emilia-Romagna region to consider the existing networks of WWTPs and biogas systems to valorize sewage sludge for bioenergy production and minimizing environmental impact. The results of the GIS analyses allowed to localize the highest productive territorial areas and highlighted where sewage sludges are abundantly located and could be better exploited within agricultural biogas plants. Finally, the achieved results could help plan suitable policy interventions that are centered on biomass supply and outputs diversification, governance, and social participation, since the regulatory framework could play a crucial role in planning the reuse of these wastes for developing a more sustainable biomethane sector in line with the green economy goals.

Value-added innovation in infrastructure systems, lessons learned from wastewater treatment plants

2019 ◽  
Vol 31 (6) ◽  
pp. 1049-1063 ◽  
Author(s):  
Shervin Jamshidi
Keyword(s):  
Wastewater Treatment ◽  
Quality Management ◽  
Wastewater Treatment Plants ◽  
Value Added ◽  
Green Energy ◽  
Shared Values ◽  
Service Industries ◽  
Organic Fertilizers ◽  
Content Type ◽  
Managerial System

PurposeWastewater treatment plants (WWTPs) are evolving toward sustainability. The purpose of this paper is to discuss how innovation can develop these mission-based service industries to value-added manufacturing enterprises. Here, innovation is embedded in altering the understanding of stakeholders toward the objectives and managerial systems of these infrastructures.Design/methodology/approachThis study uses multidisciplinary principles in management, economics and engineering to assess the integration of innovation and quality management with different perspectives. It initially compares the conventional and innovative approach for operating WWTPs. Subsequently, it emphasizes the contribution of the tailor-made managerial system of wastewater treatment enterprises through prospective markets, customers’ preferences, probable competitions and shared values.FindingsThe tailor-made managerial system for wastewater treatment can add economic values by manufacturing multiple demand products for local markets. Water, green energy, organic fertilizers and raw materials are the main products that can be simultaneously recovered according to the customers’ demand. The Kano model also verifies that the new managerial system has this potential to turn the conventional must-be treatment systems into delightful enterprises. It can provide different stakeholders with shared social and environmental values. Accordingly, locals and customers can be engaged in monitoring the quality of products to consider their feedback for decision making and upgrading. This indirectly defines shared values among operators and society to reinforce localization and ecosystem protection. Additionally, this research reveals that the market of the aforementioned strategic products is promising as a blue ocean for set sail due to the lack of competitors.Originality/valueThis study introduces wastewater treatment as a promising enterprise for integrating innovation and quality management.

scholarly journals The Assessment of Using the Sewage Sludge in Agriculture in Romania

2018 ◽  
Vol 55 (4) ◽  
pp. 700-703
Author(s):  
Carmelia Mariana Dragomir Balanica ◽  
Aurel Gabriel Simionescu ◽  
Iulian Gabriel Birsan ◽  
Cezar Ionut Bichescu ◽  
Cristian Muntenita
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Wastewater Treatment ◽  
Sewage Sludge ◽  
Urban Area ◽  
Metal Toxicity ◽  
Wastewater Treatment Plants ◽  
Urban Wastewater ◽  
Usage Analysis ◽  
Urban Wastewater Treatment

Sewage sludge resulted from urban wastewater treatment plants is generally accepted as a valuable source of nutrient and soil conditioner for agricultural usage. Analysis of amount of heavy metals in sewage sludge is essential previous to utilization of the sludge to agriculture considering the inevitable risk of heavy metal toxicity to soil, vegetation and humans. The present paper aims to analyse the characteristics of the sewage sludge resulted in an urban area for 5 years. Sewage sludge generated from five wastewater treatment plants in the South and South Est part of Romania were analysed.

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