Energy Balance in Wastewater Systems with Energy Recovery: A Portuguese Case Study

Jorge, Catarina; Almeida, M. C.; Covas, Dídia

doi:10.3390/infrastructures6100141

Cited by 5 publications

(3 citation statements)

References 24 publications

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“…Different research projects have focused their investigation on energy recovery in pressurized water systems. One of the energy recoveries is through the application of PATs [14][15][16][17]. Williams et al [17] proposed substituting Pressure Reduction Valves (PRV) to recover the energy dissipated in the valves, generating significant electric savings.…”

Section: Pumps As Turbinesmentioning

confidence: 99%

Street Lighting and Charging Stations with PATs Location Applying Artificial Intelligence

Pineda-Sandoval

Arciniega-Nevárez

Delgado-Galván

et al. 2023

Water

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This research proposes a methodology with multi-objective optimization for the placement of Pumps operating As Turbines (PATs), energizing street lighting, devices for monitoring the water network, and charging stations for small electric vehicles such as bikes and scooters. This methodology helps to find the most profitable project for benefiting life quality and energy recovery through pumps operating as turbines, replacing virtual pressure reduction valves to locate the best point for decreasing pressure. PATs are selected by maximizing power recovery and minimizing pressure in the system as well as maximizing recoverable energy. Benefits analyzed include the reduction of carbon dioxide emissions and fuel use, as well as the saving of electricity consumption and benefiting socio-economic impact with street lighting, monitoring, and charging station. It was considered that each PAT proposed by the methodology will supply a street light pole, a station for monitoring the water network, and a charging station; under these established conditions, the return on investment is up to 1.07 at 12 years, with a power generation of 60 kWh per day.

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Section: Pumps As Turbinesmentioning

confidence: 99%

Street Lighting and Charging Stations with PATs Location Applying Artificial Intelligence

Pineda-Sandoval

Arciniega-Nevárez

Delgado-Galván

et al. 2023

Water

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“…This energy is the total energy needed to pump the entire volume generated in the region if there were no limitations in the network transport capacity upstream of the PS. It corresponds to an estimate of the energy consumed if no discharges and floods occur and the entire volume generated is pumped [20,21,32].…”

Section: Assessment At Subsystem Levelmentioning

confidence: 99%

“…Causes of these UI into wastewater systems are associated with groundwater infiltration, rain-derived inflows, among others [20,21]. Average values of undue inflows into wastewater systems reported for Norway, Denmark, Finland, and Sweden are between 30% and 80% [22], values estimated considering average dry weather flows and these authors discuss the uncertainty related to the methods used, also resulting from calculations using time-aggregated volumes, yearly.…”

Section: Introductionmentioning

confidence: 99%

Water, Energy, and Emissions Nexus: Effect of Inflows in Urban Drainage Systems

Jorge

Almeida

Brito

et al. 2022

Water

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The urban water sector significantly contributes to energy consumption and greenhouse gas (GHG) emissions. Detailed assessment of the wastewater system input provides opportunities for improving the water, energy, and emissions nexus. The inflow of water not requiring treatment into wastewater systems is acknowledged worldwide. These undue inflows can increase the footprint of these systems. Together with flooding and discharges, monitoring of undue inflows is not a common practice in water utilities. Three levels of analysis are proposed to assess the magnitude of the impact of undue inflows in the water–energy–greenhouse gas (W-E-G) emissions nexus: at a national level, calculation of performance indicators using yearly data; at the utility level, performance indicators calculations using yearly, monthly, and sub-daily data; at the subsystem level, calculations using mathematical modeling. Results show the implications of undue inflows on energy and GHG emissions, including the effect of flooding and discharges. The importance of undue inflows in the W-E-G nexus is sustained by the results of three case studies in Portugal. Each level of analysis is tailored to the information available, allowing a step-by-step understanding of the relationship between water, energy consumption, and emissions of the urban drainage inflows.

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Further experimental analysis of undershot water wheels towards the development of a prototype model

Macara,

Capelo,

Ferreira

et al. 2024

Urban Water Journal

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Energy Balance in Wastewater Systems with Energy Recovery: A Portuguese Case Study

Cited by 5 publications

References 24 publications

Street Lighting and Charging Stations with PATs Location Applying Artificial Intelligence

Street Lighting and Charging Stations with PATs Location Applying Artificial Intelligence

Water, Energy, and Emissions Nexus: Effect of Inflows in Urban Drainage Systems

Further experimental analysis of undershot water wheels towards the development of a prototype model

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