Publications by authors named "Safak Basa"
Energy-efficient wastewater treatment plants (WWTPs) utilize systems like high-rate activated sludge (A-stage) system to redirect organics from wastewater are redirected into energy-rich sludge (A-sludge). Anaerobic membrane bioreactors (AnMBRs) offer lower footprint and higher effluent quality compared to conventional digesters. In this study, the biological treatment and the filtration performances of AnMBRs for A-sludge digestion under mesophilic and thermophilic conditions were comparatively evaluated through lab-scale experiments, mass balancing and dynamic modeling.
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- The study aims to create a model for predicting the long-term performance of High-Rate Activated Sludge (HRAS) processes, focusing on removing carbon, nitrogen, and phosphorus.
- The model builds on existing Activated Sludge Models (ASM1 and ASM3) and includes important mechanisms like adsorption and substrate storage, following a detailed calibration process with data from a pilot HRAS plant.
- The model achieved over 70% prediction efficiency for several key metrics, but identified uncertainties, especially in soluble COD estimates, attributed to variations in wastewater characteristics not fully accounted for in the model.
Article Synopsis
- Coagulants from water treatment plants typically produce sludge that is often sent to landfills, but utilizing this sludge is encouraged for sustainability.
- This study explores using WTP sludge, specifically iron sludge, as a substitute for conventional coagulants in a high-rate activated sludge system, finding it enhances treatment efficiency.
- The addition of iron sludge improved particulate chemical oxygen demand removal and sludge settleability, while also reducing overall operational costs by 11%, indicating potential benefits for both water treatment facilities and environmental sustainability.
Aerobic granules contain microorganisms that are responsible for carbon, nitrogen, and phosphorus removal in aerobic granular sludge (AGS) process in which aerobic/anoxic/anaerobic layers (from surface to core) occur in a single granule. Optimizing the aerobic granular sludge (AGS) process for granulation and efficient nutrient removal can be challenging. The aim of this study was to examine the impact of settling prior to AGS process on granulation and treatment performance of the process.
View Article and Find Full Text PDFEnergy-rich sludge can be obtained from primary clarifiers preceding biological reactors. Alternatively, the incoming wastewater can be sent to a very-high-loaded activated sludge system, i.e.
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