Back to Search
Start Over
Thermal energy recovery from a sequencing batch biofilter granular reactor (SBBGR) on a pilot scale: Evaluation of the effects of energy extraction on the depuration process, process effectiveness, and results scalability
- Source :
- Energy conversion and management (2020). doi:10.1016/j.enconman.2020.113582, info:cnr-pdr/source/autori:Barca Emanuele; De Sanctis Marco; Altieri Valerio Guido; Di Iaconi Claudio./titolo:Thermal energy recovery from a sequencing batch biofilter granular reactor (SBBGR) on a pilot scale: Evaluation of the effects of energy extraction on the depuration process, process effectiveness, and results scalability/doi:10.1016%2Fj.enconman.2020.113582/rivista:Energy conversion and management/anno:2020/pagina_da:/pagina_a:/intervallo_pagine:/volume
- Publication Year :
- 2020
- Publisher :
- Pergamon., New York, Regno Unito, 2020.
-
Abstract
- Urban wastewater is a valuable source of clean energy available for both building conditioning and hot sanitary water production, thus reducing primary energy demand and greenhouse gas emissions. In the present study, the integration of a highly efficient solar-assisted fully off-the-grid water-source heat pump (SHP) with a sequencing batch biofilter granular reactor (SBBGR) is tested on a pilot scale for recovering and reusing thermal energy generated during the depuration process. The prototype was designed to simulate wastewater production (240 L/d), domestic hot water (DHW) (152 L/d at 40 °C), and space heating (20–25 °C) energy demand for a one-person equivalent. Three set temperatures for heat extraction from the SBBGR were tested: 20, 14, and 10 °C. Heat extraction had limited effects on the average SBBGR performances. The SBBGR ensured a removal efficiency close to 90% for total suspended solids (TSS), chemical oxygen demand (COD), and ammonia, whereas a decrease in total nitrogen (TN) removal efficiency, namely from 75% to 71%, was observed with the operating temperature decrease. Energy recovery data suggested that the energy extracted from the SBBGR might cover the energy demand for DHW production or space heating from April to October. Thus, the collected energy data was modeled with the following purposes: highlighting the key parameters for optimizing energy recovery, quantifying the share of recoverable energy derived the microbial metabolism, and supporting or rejecting the scalability of the results. The model outcomes confirmed that the temperature difference between the sewage and heat extraction set point temperatures was the key parameter for energy recovery and succeeded in estimating the contribution of microbial metabolisms (i.e. about 3.2 kWh/m3•d). However, the estimation of the full-scale recoverable energy was partially biased by the impact of the environmental conditions on the pilot.
- Subjects :
- Primary energy
020209 energy
Linear model
Energy Engineering and Power Technology
02 engineering and technology
law.invention
020401 chemical engineering
law
0202 electrical engineering, electronic engineering, information engineering
0204 chemical engineering
Total suspended solids
Energy recovery
Waste management
Renewable Energy, Sustainability and the Environment
business.industry
Chemical oxygen demand
Thermal energy recovery
Sewage treatment
Fuel Technology
Nuclear Energy and Engineering
Wastewater
Biofilter
Tie series
Environmental science
business
Solar powered water source heat pump
Thermal energy
Heat pump
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Energy conversion and management (2020). doi:10.1016/j.enconman.2020.113582, info:cnr-pdr/source/autori:Barca Emanuele; De Sanctis Marco; Altieri Valerio Guido; Di Iaconi Claudio./titolo:Thermal energy recovery from a sequencing batch biofilter granular reactor (SBBGR) on a pilot scale: Evaluation of the effects of energy extraction on the depuration process, process effectiveness, and results scalability/doi:10.1016%2Fj.enconman.2020.113582/rivista:Energy conversion and management/anno:2020/pagina_da:/pagina_a:/intervallo_pagine:/volume
- Accession number :
- edsair.doi.dedup.....3711da8401ba46e269448f910d49871b