Nowadays, sewage sludge management represents one of the most important issues in wastewater treatment. Within the European project "ROUTES," wet oxidation (WO) was proposed for sludge minimization. Four different types of sludge were treated in an industrial WO plant: (1) municipal primary sludge (chemical oxygen demand COD: 73.0 g/L; volatile suspended solid VSS: 44.1 g/L); (2) secondary sludge from an industrial wastewater treatment plant (WWTP) without primary sedimentation (COD: 71.8 g/L; VSS: 34.2 g/L); (3) secondary sludge from a mixed municipal and industrial WWTP without primary sedimentation (COD: 61.9 g/L; VSS: 38.7 g/L); and (4) mixed primary (70%) and secondary (30%) municipal sludge (COD: 81.2 g/L; VSS: 40.6 g/L). The effect of process parameters (temperature, reaction time, oxygen dosage) on WO performance was investigated. Depending on operating conditions, VSS and COD removal efficiency varied in the range 80-97% and 43-71%, respectively. A correlation between process efficiency and the initial VSS/TSS (total suspended solids) ratio was highlighted. Furthermore, a mathematical model of WO process for simulating VSS and COD profiles was developed.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1007/s11356-014-3144-9 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Unlocking new electron transport routes: Insights into enhanced long-chain fatty acid conversion in valorization of lipid-rich waste.
Bioresour Technol
December 2024
School of Water Conservancy and Transportation, Zhengzhou University, Zhengzhou 450001, China. Electronic address:
Article Synopsis
- The study investigated how alkaline fermentation of lipid-rich waste can increase the production of volatile fatty acids (VFAs) by using sulfate to enhance the metabolic pathways for long-chain fatty acids (LCFAs).
- The results showed a significant increase in VFA yield (671.1 mg COD/g VSS), particularly under high lipid conditions, with effective conversion of LCFAs like oleic and linolenic acids through the β-oxidation pathway.
- The research also identified key genes and microbial groups involved in this process, suggesting new strategies for improving recycling of lipid waste and VFA production in anaerobic systems.
From waste to wealth: Exploring the effect of particle size on biopolymer harvesting from aerobic granular sludge.
Bioresour Technol
December 2024
Centre for Water Research, Advanced Institute of National Sciences, Beijing Normal University at Zhuhai, 519087, China. Electronic address:
This study aimed to examine the impact of aerobic granular sludge (AGS) sizes on its properties and alginate-like exopolymers (ALE) recovery potential. The AGS was cultivated in a lab-scale bioreactor and categorized into six size classes with 200 μm intervals. There appeared a critical size (400-800 μm) for developing stable AGS structure and excellent ALE recovery.
View Article and Find Full Text PDFMolecular Mechanisms Underlying Amyloid Beta Peptide Mediated Upregulation of Vascular Cell Adhesion Molecule-1 in Alzheimer Disease.
J Pharmacol Exp Ther
November 2024
Department of Pharmaceutics and Brain Barriers Research Center, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota (V.S.S., K.K.K.); Department of Radiology, Mayo Clinic College of Medicine, Rochester, Minnesota (G.L.C., V.J.L.); Department of Quantitative Health Sciences, Mayo Clinic, Rochester, Minnesota (X.T., K.J.T., K.R.K.); and Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota (L.L.)
Amyloid (A) deposition and neurofibrillary tangles are widely considered the primary pathological hallmarks of familial and sporadic forms of Alzheimer disease (AD). However, cerebrovascular inflammation, which is prevalent in 70% of AD patients, is emerging as another core feature of AD pathology. In our current work, we investigated the hypothesis that A42 exposure drives an increase in vascular cell adhesion molecule-1 (VCAM-1) expression, a cerebrovascular inflammatory marker expressed on the blood-brain barrier (BBB) endothelium in humans and murine models.
View Article and Find Full Text PDFEvaluating efficacy and safety of ocrelizumab biosimilar (Xacrel) compared to the originator (Ocrevus) in relapsing multiple sclerosis: a phase III, randomized, equivalency, clinical trial.
Sci Rep
October 2024
Medical Department, Orchid Pharmed Company, Tehran, Iran.
Article Synopsis
- - Multiple sclerosis is a serious condition, and the study compared the efficacy and safety of a biosimilar drug called Xacrel to the original drug, Ocrevus, in patients with Relapsing Multiple Sclerosis (RMS) over 96 weeks.
- - The main goal was to see if both drugs had similar effects on reducing annual relapse rates (ARR) at 48 weeks, while also assessing other factors like disability progression, MRI results, and safety.
- - Results showed that Xacrel was equivalent to Ocrevus in reducing ARR, with no significant differences in efficacy or safety observed during the trial, confirming Xacrel as a viable alternative to Ocrevus.
The effect of salinity on trimethoprim adsorption by activated sludge extracellular polymeric substances at trace concentration.
J Environ Manage
September 2024
Jiangsu Engineering Lab of Water and Soil Eco-remediation, School of Environment, Nanjing Normal University, Nanjing, 210023, China. Electronic address:
The saline wastewater produced in industrial activities and seawater use would flow into wastewater treatment plants and affect the characteristic of extracellular polymeric substance (EPS) of activated sludge, which could potentially impact the removal of antibiotics via adsorption. Nonetheless, the effect of salinity on trimethoprim adsorption by activated sludge extracellular polymeric substances at trace concentration and the underlying mechanism remain largely unknown. In this study, the effect of salinity on the adsorption removal of a typical antibiotic, i.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!