Full-scale anaerobic single-phase digesters can be confronted with process instabilities, which often result in the accumulation of propionic acid (HPr). As a solution, an enhanced propionic acid degradation (EPAD) system has been conceptually designed and experimentally tested at lab-scale. The system consisted of two components: a liquid/solid separator containing a microfiltration membrane and an up-flow anaerobic sludge bed (UASB) reactor specialized in HPr degradation. Two lab-scale continuous stirred tank reactors (CSTR) were used, i.e. the CSTR(control) and the CSTR(treatment). Firstly, the CSTRs were stressed by organic overloading to obtain high HPr levels. During the recovery period, besides stop feeding, no actions were taken to decrease the residual HPr concentration in the CSTR(control), while the CSTR(treatment) was connected to EPAD system in order to accelerate its recovery. By the end of the experiment, the CSTR(treatment) completely recovered from HPr accumulation, while no significant decrease of the HPr level in the CSTR(control) was observed. Based on the experimental results, the up-scaling of EPAD system was evaluated and it would only account for about 2% of the volume of the full-scale digester, thus suggesting that the implementation of a mobile EPAD system in full-scale practice should be feasible.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.watres.2009.04.046 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Depressive Symptoms and Amyloid Pathology.
JAMA Psychiatry
January 2025
Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, Sahlgrenska Academy at the University of Gothenburg, Mölndal, Sweden.
Importance: Depressive symptoms are associated with cognitive decline in older individuals. Uncertainty about underlying mechanisms hampers diagnostic and therapeutic efforts. This large-scale study aimed to elucidate the association between depressive symptoms and amyloid pathology.
View Article and Find Full Text PDFUltrasensitive lab-on-paper electrochemical device via heterostructure copper/cuprous sulfide@N-doped C@Au hollow nanoboxes as signal amplifier for alpha-fetoprotein detection.
Biosens Bioelectron
January 2025
College of Sciences, Shanghai University, Shanghai, 200444, PR China; Shanghai Engineering Research Center for Integrated Circuits and Advanced Display Materials, Shanghai University, Shanghai, 200444, PR China. Electronic address:
Article Synopsis
- Early detection of cancer is vital, and this study introduces an innovative portable device called ePAD for detecting tumor markers like alpha-fetoprotein (AFP) at very low levels.
- The ePAD uses advanced hollow nanoboxes made of copper/cuprous sulfide and gold nanoparticles to enhance the detection process and incorporates sliding microfluidic paper chips to ensure flexibility and sensitivity.
- Test results showed the device can accurately detect AFP levels in human serum, matching results from standard methods, thus proving its potential for quick, reliable on-site cancer diagnosis.
The state of health in the European Union (EU-27) in 2019: a systematic analysis for the Global Burden of Disease study 2019.
BMC Public Health
May 2024
Department of Epidemiology and Public Health, Sciensano, Brussels, Belgium.
Background: The European Union (EU) faces many health-related challenges. Burden of diseases information and the resulting trends over time are essential for health planning. This paper reports estimates of disease burden in the EU and individual 27 EU countries in 2019, and compares them with those in 2010.
View Article and Find Full Text PDFAptasensor Integrated with Two-Dimensional Nanomaterial for Selective and Sensitive Electrochemical Detection of Ketamine Drug.
Micromachines (Basel)
February 2024
Department of Biotechnology, School of Chemical and Life Science, Jamia Hamdard, New Delhi 110062, India.
Ketamine is one of the most commonly abused drugs globally, posing a severe risk to social stability and human health, not only it is being used for recreational purposes, but this tasteless, odourless, and colourless drug also facilitates sexual assaults when it is mixed with drinks. Ketamine abuse is a threat for safety, and this misuse is one of the main uses of the drug. The crucial role of ketamine detection is evident in its contributions to forensic investigations, law enforcement, drug control, workplace integrity, and public health.
View Article and Find Full Text PDFElectrochemical Paper-Based Nanobiosensor for Rapid and Sensitive Detection of Monkeypox Virus.
ACS Appl Mater Interfaces
December 2023
Portable Chemical Sensors Lab, Department of Analytical Chemistry, Institute of Chemistry, State University of Campinas - UNICAMP, P.O. Box 6154, 13083-970 Campinas, SP, Brazil.
Monkeypox virus (MPXV) infection was classified as a public health emergency of international concern by the World Health Organization (WHO) in 2022, being transmitted between humans by large respiratory droplets, in contact with skin lesions, fomites, and sexually. Currently, there are no available accessible and simple-to-use diagnostic tests that accurately detect MPXV antigens for decentralized and frequent testing. Here, we report an electrochemical biosensor to detect MPXV antigens in saliva and plasma samples within 15 min using accessible materials.
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!