Renewable energy recovery from sewage sludge derived from chemically enhanced precipitation

Bezirgiannidis, Athanasios; Chatzopoulos, Paraschos; Tsakali, Aikaterini; Ntougias, Spyridon; Melidis, Paraschos

doi:10.1016/j.renene.2020.10.005

Cited by 23 publications

(14 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Iron salts can also be directly dosed into mainstream wastewater treatment systems or anaerobic digesters to improve sludge settleability and dewaterability. , Recently, an integrated approach to iron salt use was proposed, demonstrating that in-sewer-dosed iron had many positive flow-on effects on downstream wastewater treatment, including enhanced phosphorus removal, sludge settleability, and sludge dewaterability. , Among these previous iron-dosing approaches, the CEPT is most applied in full-scale wastewater treatment plants (WWTPs). The integration of CEPT with AD is an increasingly popular solution that significantly enhances carbon recovery from wastewater. , The carbon recovery further enables a shift of current energy-intensive wastewater treatment services, which consume 30–60% of energy demand in municipalities and account for up to 3% of global energy output, to energy neutral or even positive . However, this CEPT-AD technology roadmap is challenged by the removal of remaining nitrogen in low-carbon wastewater.…”

Section: Introductionmentioning

confidence: 99%

Novel Use of a Ferric Salt to Enhance Mainstream Nitrogen Removal from Anaerobically Pretreated Wastewater

et al. 2023

Environ. Sci. Technol.

View full text Add to dashboard Cite

This study aims to demonstrate a new technology roadmap to support the ongoing paradigm shift in wastewater management from pollutant removal to resource recovery. This is achieved by developing a novel use of an iron salt (i.e., FeCl 3 ) in an integrated anaerobic wastewater treatment and mainstream anammox process. FeCl 3 was chosen to be dosed in a proposed sidestream unit rather than in a primary settler or a mainstream reactor. This causes acidification of returned activated sludge and enables stable suppression of nitrite-oxidizing bacterial activity and excess sludge reduction. A laboratory-scale system, which comprised an anaerobic baffled reactor, a continuous-flow anoxic−aerobic (A/O) reactor, and a secondary settler, was designed to treat real domestic wastewater, with the performance of the system comprehensively monitored under a steady-state condition. The experimental assessments showed that the system had good effluent quality, with total nitrogen and phosphorus concentrations of 12.6 ± 1.3 mg N/L and 0.34 ± 0.05 mg P/L, respectively. It efficiently retained phosphorus in excess sludge (0.18 ± 0.03 g P/g dry sludge), suggesting its potential for further recovery. About half of influent organic carbon was recovered in the form of bioenergy (i.e., methane). This together with low energy consumption revealed that the system could produce a net energy of about 0.11 kWh/m 3 -wastewater, assessed by an energy balance analysis.

show abstract

Section: Introductionmentioning

confidence: 99%

Novel Use of a Ferric Salt to Enhance Mainstream Nitrogen Removal from Anaerobically Pretreated Wastewater

et al. 2023

Environ. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Policies for supporting the regional circular economy and… in order to reconsider energy management for supporting circular principles (Van der Velden 2021; Farooq et al 2021). In order to boost circular activities, current energy policies need to be revisited all the way from the microlevel (Kosmadakis et al 2021) to the macrolevel (D'Adamo, et al 2021), in order to improve efficiency (Yildizbasi 2021) and recovery (Bezirgiannidis et al 2020), by redesigning all stages of production (Diamantis et al 2021), from resource harvesting to disposal (Al-Mawali et al 2021;Medeiros et al 2021) and end-of-life practices (Jensen et al 2020). Furthermore, policy interventions should be considered involving the effective energy interdependence of individual industries within the industrial ecology/symbiosis concept (Al-Thani and Al-Ansari 2021; Ipsakis et al 2021).…”

Section: Circular Economy and Sustainabilitymentioning

confidence: 99%

Policies for supporting the regional circular economy and sustainability

2022

View full text Add to dashboard Cite

The Circular Economy and Sustainability are among the greatest challenges faced by policymakers, producers, and consumers. Circular Economy processes demand less from the environment since they can minimize waste generation and, hence, can be powerful tools to combat the negative effects of climate change. Additionally, following subsidiarity principles, public policies supporting the Circular Economy should be designed at the lowest levels of public administrations-this provides huge opportunities for regional governments to design, implement and monitor these policies. This editorial of the special issue explores and discusses implications for those policies before introducing the five papers published in the special issue dedicated to policies for regional economy and sustainability. While some of the papers attempt to conceptualize sustainable development through a microeconomic perspective, others have a clear macroeconomic empirical focus. In consequence, this special issue provides a rich body of work for further Circularity and Sustainability nexus studies.

show abstract

“…However, if managed properly, it can save more than 50% of the cost of a treatment. 3 Sludge management and treatment have five main stages: thickening, stabilization, conditioning, dewatering and drying. 4 Among these stages, stabilization is a chemical and physical process that leads to the destruction of pathogens, reducing or eliminating the potential for odor production and reducing substances that have the potential to attract carriers.…”

Section: Introductionmentioning

confidence: 99%

A comparative study on polyaluminum chloride (PACl) and Moringa oleifera (MO) chemically enhanced primary treatment (CEPT) in enhanced biogas production: anaerobic digestion performance and the Gompertz model

et al. 2023

View full text Add to dashboard Cite

show abstract

Renewable energy recovery from sewage sludge derived from chemically enhanced precipitation

Cited by 23 publications

References 32 publications

Novel Use of a Ferric Salt to Enhance Mainstream Nitrogen Removal from Anaerobically Pretreated Wastewater

Novel Use of a Ferric Salt to Enhance Mainstream Nitrogen Removal from Anaerobically Pretreated Wastewater

Policies for supporting the regional circular economy and sustainability

A comparative study on polyaluminum chloride (PACl) and Moringa oleifera (MO) chemically enhanced primary treatment (CEPT) in enhanced biogas production: anaerobic digestion performance and the Gompertz model

Contact Info

Product

Resources

About