A step-feed anoxic/oxic/anoxic/oxic (SF-A/O/A/O) was developed and successfully applied to full-scale coking wastewater treatment. The performance and microbial community were evaluated and systematically compared with the anoxic/oxic/oxic (A/O/O) process. SF-A/OA/O process exhibited efficient removal of COD, NH-N, TN, phenols, and cyanide with corresponding average effluent concentrations of 317.9, 1.8, 46.2, 1.1, and 0.2 mg·L, respectively. In particular, the TN removal efficiency of A/O/O process was only 7.8%, with an effluent concentration of 300.6 mg·L. Furthermore, polycyclic aromatic hydrocarbons with high molecular weight were the dominant compounds in raw coking wastewater, which were degraded to a greater extent in SF-A/OA/O. The abundance in Thiobacillus, SM1A02, and Thauera could be the main reason why SF-A/O/A/O was superior to A/O/O in treating TN. The microbial community structure of SF-A/O/A/O was similar among stages in system (P ≥ 0.05, Welch's t-test) and was less affected by environmental factors, which may have been one of the important factors in the system's strong stability.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.scitotenv.2021.148263 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
[Effects of seed carrier-immobilized microorganisms on the growth of rapeseed and the remediation of petroleum hydrocarbon contaminated soil].
Ying Yong Sheng Tai Xue Bao
October 2024
School of Ecological Technology and Engineering, Shanghai Institute of Technology, Shanghai 201418, China.
Petroleum hydrocarbon pollutants in soil are challenging to biodegrade, negatively impacting plant growth as well as the metabolic activity and community structure of soil microorganisms. Microorganisms immobilized by seed carriers can synergistically contribute to the remediation of petroleum hydrocarbon-contaminated soil. We prepared a rape seed carrier with immobilized microorganism by seed coating (with a mixture of diatomaceous earth and bentonite as fillers) and microbial immobilization.
View Article and Find Full Text PDF[Changes of soil microbial phospholipid fatty acid in soil profile under different land use types].
Ying Yong Sheng Tai Xue Bao
October 2024
College of Forestry, Agricultural University of Hebei, Baoding 071000, Hebei, China.
We elucidated the changes of soil microbial biomass and community structure in soil profiles under four typical land use types (farmland, grassland, secondary forest and plantation)and across five soil layers (0-10, 10-20, 20-30, 30-40, 40-50 cm) in the northern mountainous region of Hebei Province. We measured soil microbial biomass by phospholipid fatty acid (PLFA) method, and investigated the effects of land use and soil depth on soil microbial biomass and community structure by variance analysis, correlation analysis and redundancy analysis. The results showed that soil water content, bulk density, and organic carbon content of farmland differed significantly from other land use types.
View Article and Find Full Text PDFBreastfeeding and infant gut microbiota: influence of bioactive components.
Gut Microbes
December 2025
Department of Biochemistry and Molecular Biology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA.
Establishment of the gut microbiota during infancy is critical for host health with long-lasting implications. In this orchestrated process, microbial assembly is influenced by an increasing number of genetic and environmental factors, among which breastfeeding is considered as one of the most significant drivers for infant gut microbiota development. As the optimal diet for the infants, maternal milk provides numerous nutritional, microbial, and bioactive components to ensure the most adequate microbial growth and development of a 'healthy' gut microbiota during early life.
View Article and Find Full Text PDFFecal microbiota transplantation for glaucoma; a potential emerging treatment strategy.
Curr Res Microb Sci
November 2024
HIV/STI Surveillance Research Center, and WHO Collaborating Center for HIV Surveillance, Institute for Futures Studies in Health, Kerman University of Medical Sciences, Kerman, Iran.
Glaucoma is the primary cause of irreversible blindness globally. Different glaucoma subtypes are identified by their underlying mechanisms, and treatment options differ by its pathogenesis. Current management includes topical medications to lower intraocular pressure and surgical procedures like trabeculoplasty and glaucoma drainage implants.
View Article and Find Full Text PDFGut microbiota and bile acids: Metabolic interactions and impacts on diabetic kidney disease.
Curr Res Microb Sci
November 2024
Division of Nephrology, Minhang Hospital, Fudan University, Shanghai, China.
The intestinal microbiota comprises approximately 10-10 species of bacteria and plays a crucial role in host metabolism by facilitating various chemical reactions. Secondary bile acids (BAs) are key metabolites produced by gut microbiota.Initially synthesized by the liver, BA undergoes structural modifications through the activity of various intestinal microbiota enzymes, including eukaryotic, bacterial, and archaeal enzymes.
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!