This study evaluated the influence of the applied volumetric organic load on biohydrogen production in an anaerobic sequencing batch biofilm reactor (AnSBBR) with 3.5 L of liquid medium and treating 1.5 L of glycerin-based wastewater per cycle at 30 °C. Six applied volumetric organic loads (AVOLCT) were generated from the combination of cycle periods (3 and 4 h) and influent concentrations (3000, 4000, and 5000 mg chemical oxygen demand (COD) L(-1)), with values ranging from 7565 to 16,216 mg COD L(-1) day(-1). No clear relationship was found between the applied volumetric organic load and the hydrogen production. However, the highest hydrogen molar production (MPr 67.5 mol H2 m(-3) day(-1)) was reached when the reactor was operated with a cycle period of 4 h and an influent concentration of 5000 mg COD L(-1) (AVOLCT 12,911 mg COD L(-1) day(-1)). This condition also reached the highest molar yield per applied load based on the organic matter (MYALC,m 21.1 mol H2 kg COD(-1)). In addition, the pretreatment of the sludge/inoculum was found to not influence the productivity/yield of the process, and the use of crude glycerol as a sole source of carbon exhibited a clear disadvantage for hydrogen production compared to pure glycerol. The AnSBBR used for the hydrogen production experiments operated with pure glycerol as a sole carbon source exhibited important practical potential.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1007/s12010-014-1421-1 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Human-in-the-loop machine learning-based quantitative assessment of hemifacial spasm based on volumetric interpolated breath-hold examination MR.
Br J Radiol
January 2025
Shenzhen University Medical School, Shenzhen University, Shenzhen, Guangdong, 518055, China.
Objective: The purpose of this study was to assess the severity of hemifacial spasm (HFS) through quantitative measures that associated it with neurovascular contact (NVC).
Methods: We enrolled 108 HFS patients (63 severe and 45 mild cases) and implemented a human-in-the-loop approach to develop a quantitative NVC feature package. This process involved using interactive segmentation on three-dimensional volumetric interpolated breath-hold examination (VIBE) MR images to delineate vascular and nerve structures.
Extracellular volume expansion drives vertebrate axis elongation.
Curr Biol
January 2025
Department of Genetics, Harvard Medical School, Boston, MA 02115, USA; Department of Pathology, Brigham and Women's Hospital, Boston, MA 02115, USA. Electronic address:
The vertebrate bauplan is primarily established via the formation of embryonic tissues in a head-to-tail progression. The mechanics of this elongation, which requires the presomitic mesoderm (PSM), remain poorly understood. Here, we find that avian PSM explants can elongate autonomously when physically confined in vitro, producing a pushing force promoting posterior elongation of the embryo.
View Article and Find Full Text PDFOptical neural implants allow neuroscientists to access deep brain regions, enabling to decipher complex patterns of neural activity. In this field, the use of optical fibers is rapidly increasing, and the ability to generate high-quality metal patterns on their non-planar surface would further extend their application. Here, we propose to use alternating metal shielding and dielectric confinement to engineer the mode-division properties of tapered optical fiber neural implants.
View Article and Find Full Text PDFRecycling of Agricultural Film Wastes for Use as a Binder in Building Composites.
Materials (Basel)
January 2025
Research Team of Quantitative Methods and Spatial Management, Institute of Agriculture and Horticulture, Faculty of Agricultural Sciences, University of Siedlce, B. Prusa 14, 08-110 Siedlce, Poland.
Plastic film, also known as low-density polyethylene (LDPE), poses serious environmental challenges due to mass production, short life cycle, and poor waste management. The main aim of this paper was to examine the suitability of using agricultural waste film as a binder in construction composites instead of the traditional cement slurry. Molten at temperatures of around 120-150 °C wastes was mixed with fine sand and gravel aggregate as filler.
View Article and Find Full Text PDFRecombinant Production of Bovine α-Casein in Genome-Reduced Strain IIG-Bs-20-5-1.
Microorganisms
January 2025
Institute of Food Science and Biotechnology, Department of Bioprocess Engineering, University of Hohenheim, Fruwirthstraße 12, 70599 Stuttgart, Germany.
Background: Cow's milk represents an important protein source. Here, especially casein proteins are important components, which might be a promising source of alternative protein production by microbial expression systems. Nevertheless, caseins are difficult-to-produce proteins, making heterologous production challenging.
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!