Heat production profiles from batch aerobic thermophilic processing of high strength swine waste

Blackburn, James W.; Cheng, JJ

doi:10.1002/ep.10093

Cited by 2 publications

(1 citation statement)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…where, D COD aer is the amount of COD that is used for aerobic respiration per day The enthalpy of reaction for aerobic respiration is not trivial to calculate theoretically and was adopted from Blackburn & Cheng (2005). The enthalpies of reaction for nitrification and denitrification can be calculated by combining the half reactions for each conversion step using tabulated numbers for their respective enthalpy of formation (Kleerebezem & van Loosdrecht 2010;Fernandez-Arevalo et al 2014), see Supplementary Information for reactions and calculation of enthalpies.…”

Section: General Plant-wide Temperature Modelmentioning

confidence: 99%

Plant-wide modelling and analysis of WWTP temperature dynamics for sustainable heat recovery from wastewater

Arnell

Ahlström

Wärff

et al. 2021

Water Science and Technology

View full text Add to dashboard Cite

Wastewater heat recovery up-stream of wastewater treatment plants (WWTPs) poses a risk to treatment performance, i.e. the biological processes. In order to perform a sustainability analysis, a detailed prediction of the temperature dynamics over the WWTP is needed. A comprehensive set of heat balance equations were included in a plant-wide process model and validated for the WWTP in Linköping, Sweden, to predict temperature variations over the whole year in a temperate climate. A detailed model for the excess heat generation of biological processes was developed. The annual average temperature change from influent to effluent was 0.78 °C with clear seasonal variations. 45% of the temperature change arises from processes other than the activated sludge unit. Hence, plant-wide energy modelling was necessary to predict in-tank temperature in the biological treatment steps. The energy processes with the largest energy gains were solar radiation and biological processes, while the largest losses were from conduction, convection and atmospheric radiation. Tanks with large surface areas have significant impact on the heat balance regardless of biological processes. Simulating a 3 °C lower influent temperature, the temperature in the activated sludge unit dropped by 2.8 °C, which had a negative impact on nitrogen removal.

show abstract

Section: General Plant-wide Temperature Modelmentioning

confidence: 99%