The saponification wastewater from the process of propylene oxide (PO) production is contaminated with high chemical oxygen demand (COD) and chlorine contents. Although the activated sludge process could treat the PO saponification wastewater effectively, the residual sludge was difficult to be disposed properly. In this research, microbes in PO saponification wastewater residual sludge were acclimated to produce poly (3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) from volatile fatty acids. Through Miseq Illumina highthroughput sequencing, the bacterial community discrepancy between the original and the acclimated sludge samples were analyzed. The proportions of Bacillus, Acinetobacter, Brevundimonas and Pseudomonas, the potential PHBV-producers in the residual sludge, were all obviously increased. In the batch fermentation, the production of PHBV could achieve 4.262g/L at 300min, with the content increased from 0.04% to 23.67% of mixed liquor suspended solid (MLSS) in the acclimated sludge, and the COD of the PO saponification wastewater was also decreased in the fermentation. This work would provide an effective solution for the utilization of PO saponification wastewater residual sludge.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.ijbiomac.2017.01.106 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Optimization of poly(-3-hydroxybutyrate-co-3-hydroxyvalerate) synthesis using sodium acetate as a carbon source by Rhodococcus sp. lz1 via response surface methodology.
Int J Biol Macromol
January 2025
School of Biological Science and Technology, University of Jinan, Jinan, China. Electronic address:
Article Synopsis
- - This study focuses on Rhodococcus sp. lz1, a bacterium from wastewater, which can effectively convert various carbon sources into Poly(-3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) while lacking lipopolysaccharides, making it less likely to provoke immune responses.
- - Using response surface methodology, optimal conditions for PHBV production were established as a carbon source concentration of 6.8 g/L, inoculum amount of 6.9%, and seed age of 11 hours, resulting in a yield increase of 8.78% to 41.87%.
- - Analytical techniques like nuclear magnetic resonance, thermogravimetric analysis, and
Uncovering the impact of metals on the formation and physicochemical properties of fat, oil and grease deposits in the sewer system.
Chemosphere
September 2024
School of Engineering, RMIT University, Melbourne VIC 3001, Australia. Electronic address:
The deposition of fats, oil, and grease (FOG) in sewers reduces conveyance capacity and leads to sanitary sewer overflows. The major contributing factor lies in the indiscriminate disposal of used cooking oil (UCO) via kitchen sinks. While prior investigations have mostly highlighted the significance of Ca from concrete biocorrosion, the influence of common metal ions (e.
View Article and Find Full Text PDFElucidating the impact of sanitary waste on the formation of fat, oil and grease deposits in sewer systems.
Chemosphere
June 2024
School of Engineering, RMIT University, Melbourne, 3000, Australia. Electronic address:
The accumulation of fat, oil and grease (FOG) deposits in sanitary sewer systems is a significant cause of sewer overflows, mainly due to their tendency to adhere to pipe walls. The aim of this study is to (i) develop laboratory-prepared FOG deposits using a mixture of iron (Fe) and aluminium (Al) metal ions, fatty acids, saccharides and cooked oils, in addition to various sanitary waste materials such as paper towels, wipes and pads and (ii) examine the characteristics of these FOG deposits. The goals of this study were to (i) gain a deeper understanding of the impact of sanitary waste on the formation of FOG deposits and (ii) discuss the detailed physiochemical properties of these FOG deposits.
View Article and Find Full Text PDFPhysicochemical characteristics of grease-trap wastewater with different potential mechanisms of FOG solid formation, separation, and accumulation inside grease traps.
Water Res
June 2024
Research Centre for Sustainable Technologies, Faculty of Engineering, Computing and Science, Swinburne University of Technology, Jalan Simpang Tiga, 93350 Kuching, Sarawak, Malaysia.
Article Synopsis
- * Found that the grease trap had a lower pH (5-6) than typical sewer conditions (6-7) and observed significant differences in solid and dissolved materials between the inlet and outlet, indicating the baffle wall's role in separation.
- * Discovered that sludge samples had higher total solids, while scum samples contained more volatile solids and free fatty acids, identifying four potential mechanisms (crystallization, emulsification, saponification, baffling) that influence FOG properties in the grease trap.
A clean process for the recovery of rare earth and transition metals from NiMH battery based on primary amine and lauric acid.
J Environ Manage
February 2024
CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, PR China; Jiangxi Province Key Laboratory of Cleaner Production of Rare Earths, Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou, 341000, PR China; Fujian Research Center for Rare Earth Engineering Technology, Xiamen Institute of Rare Earth Materials, Haixi Institute, Chinese Academy of Sciences, Xiamen, 361021, PR China; School of Rare Earths, University of Science and Technology of China, Hefei, 230026, PR China. Electronic address:
A novel rare earth separation system composed of lauric acid (LA) and primary ammonium (RNH) was studied. Compared with individual LA and RNH, the mixed extraction system can significantly improve the extraction and separation ability of rare earth (RE). When LA and RNH are mixed in an equal molar ratio, the synergistic coefficient for extracting Nd(III) in the system reaches 136.
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!