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microbialcommunities, etc ; Anaeromyxobacter; Dechloromonas; Geobacter; Geothrix; Ideonella; Zoogloea; arsenic; bioavailability; bioremediation; dominant species; genes; China; Show all 13 Subjects
Abstract:
... Scorodite (FeAsO₄·H₂O) is a common arsenic-bearing (As-bearing) iron mineral in near-surface environments that could immobilize or store As in a bound state. In flooded soils, microbe induced Fe(III) or As(V) reduction can increase the mobility and bioavailability of As. Additionally, humic substances can act as electron shuttles to promote this process. The dynamics of As release and diversity of ...
microbialcommunities, etc ; biofilm; denitrification; hydrogen sulfide; models; nitrates; pollution; sewage; sewer systems; sulfur; toxicity; China; Show all 12 Subjects
Abstract:
... Biogenic hydrogen sulfide is an odorous, toxic and corrosive gas released from sewage in sewers. To control sulfide generation and emission, nitrate is extensively applied in sewer systems for decades. However, the unexpected sulfide rebound after nitrate addition is being questioned in recent studies. Possible reasons for the sulfide rebounds have been studied, but the mechanism is still unclear, ...
microbialcommunities, etc ; ambient temperature; atmospheric pressure; community structure; disulfides; genes; hydrogen sulfide; leachates; oxidoreductases; sulfates; China; Show all 11 Subjects
Abstract:
... Attention should be paid to the sulfate reduction behavior in a pressure-bearing leachate saturated zone. In this study, within the relative pressure range of 0–0.6 MPa, the ambient temperature with the highest sulfate reduction rate of 50°C was selected to explore the difference in sulfate reduction behavior in a pressure-bearing leachate saturated zone. The results showed that the sulfate reduct ...
... The impact of antibiotics on the environmental protection and sludge treatment fields has been widely studied. The recovery of hydrogen from waste activated sludge (WAS) has become an issue of great interest. Nevertheless, few studies have focused on the impact of antibiotics present in WAS on hydrogen production during dark anaerobic fermentation. To explore the mechanisms, sulfamethoxazole (SMX) ...
microbialcommunities, etc ; Thauera; anaerobic ammonium oxidation; biodegradability; carbon; denitrification; long term experiments; models; nitrogen; nitrous oxide production; particulate organic matter; China; Show all 12 Subjects
Abstract:
... In this study, the effects of soluble readily biodegradable COD (sCOD) and particulate slowly biodegradable COD (pCOD) on anammox process were investigated. The results of the long-term experiment indicated that a low sCOD/N ratio of 0.5 could accelerate the anammox and denitrification activity, to reach as high as 84.9%±2.8% TN removal efficiency. Partial denitrification-anammox (PDN/anammox) and ...
microbialcommunities, etc ; Fourier transform infrared spectroscopy; Methanobacterium; Methanosarcina; anaerobic digestion; community structure; methane; methane production; methanogens; microalgae; sewage sludge; thermogravimetry; China; Show all 13 Subjects
Abstract:
... To improve methane production from sewage sludge (SS), co-digestion of SS and microalgae (MA) was studied and the application of thermo-alkaline pretreatment to MA was evaluated. The results showed that thermo-alkaline pretreatment at 90°C for 120 min on MA was the optimum pretreatment condition. Furthermore, when the volatile solids (VS) ratio of SS and MA was 1:2, the methane yield reached maxim ...
microbialcommunities, etc ; Desulfomicrobium; Geobacter; Rhodoplanes; activated carbon; antibiotic resistance; bioretention areas; databases; durability; nitrogen; phosphorus; prediction; sulfamethoxazole; total nitrogen; wastewater; China; Show all 16 Subjects
Abstract:
... To understand the long-term performance of bioretention systems under sulfamethoxazole (SMX) stress, an unplanted bioretention system (BRS) and two modified BRSs with coconut-shell activated carbon (CAC) and CAC/zero-valent-iron (Fe⁰) granules (CAC-BRS and Fe/CAC-BRS) were established. Both CAC-BRS and Fe/CAC-BRS significantly outperformed BRS in removing total nitrogen (TN) (CAC-BRS: 82.48%; Fe/C ...
... With the rapid expansion of livestock production, the amount of livestock wastewater accumulated rapidly. Lack of biodegradable organic matter makes denitrification of livestock wastewater after anaerobic digestion more difficult. In this study, Myriophyllum aquaticum constructed wetlands (CWs) with efficient nitrogen removal performance were established under different carbon/nitrogen (C/N) ratio ...
... The ultimate purpose of phytoextraction is not only to remove heavy metals from soil but also to improve soil quality. Here, we evaluated how the joint effect of Streptomyces pactum (strain Act12) and inorganic (Hoagland's solution) and organic (humic acid and peat) nutrients affected the phytoextraction practice of cadmium (Cd) and zinc (Zn) by potherb mustard, and the microbial community composi ...
microbialcommunities, etc ; Achromobacter; Mycobacterium; Stenotrophomonas; ammonia; antibiotic resistance; antibiotic resistance genes; antibiotics; autumn; biofilm; community structure; hardness; metagenomics; plasmids; plate count; seasonal variation; spring; suburban areas; summer; temperature; total organic carbon; water distribution; water treatment; winter; China; Show all 25 Subjects
Abstract:
... Antibiotic resistance genes (ARGs) are an emerging issue for drinking water safety. However, the seasonal variation of ARGs in drinking water distribution systems (DWDS) is still unclear. This work revealed the tempo-spatial changes of microbial community, ARGs, mobile genetic elements (MGEs) co-occurring with ARGs, ARG hosts in DWDS bulk water by means of metagenome assembly. The microbial commun ...
microbialcommunities, etc ; bacteria; environment; microbiome; Show all 4 Subjects
Abstract:
... The complexity of microbial communities suggests prevalent interactions involving more than just pairs of species. These so-called higher-order interactions may reveal new molecules that enable bacteria to deal with complex environments. This forum article discusses how higher-order interactions can be detected and why molecular biologists might care. ...
microbialcommunities, etc ; community structure; toxicity; Show all 3 Subjects
Abstract:
... Antibiotic–metal complexes (AMCs) formed by antibiotics and metal ions have attracted considerable attentions in recent years. Although different removal methods for AMCs have been reported in the literature, very few investigations have focused on the mechanisms and toxic effects of antibiotic–metal coordination. This review briefly describes the structural characteristics of various commonly use ...
microbialcommunities, etc ; Cyanobacteria; freshwater; pollution; sediments; Show all 5 Subjects
Abstract:
... Cyanobacterial blooms are important environmental problems in aquatic ecosystems. Researchers have found that cyanobacterial blooms cannot be completely prevented by controlling and/or eliminating pollutants (nutrients). Thus, more in-depth basic research on the mechanism of cyanobacterial blooms is urgently needed. Cyanobacteria, being primordial microorganisms, provide habitats and have various ...
microbialcommunities, etc ; biomass; environmental science; growth models; Show all 4 Subjects
Abstract:
... The conventional method for determining growth kinetics of microbial consortia relies on the total biomass concentration. This may be inaccurate for substrates that are uncommon in nature and can only be degraded by a small portion of the microbial community. 1,4-dioxane, an emerging contaminant, is an example of such substrates. In this work, we evaluated an improved method for determining the gr ...
microbialcommunities, etc ; interspecific competition; nestedness; nutrition; soil; Show all 5 Subjects
Abstract:
... PURPOSE: Given the vast microorganisms and infertile resources in the soil, nutritional resources would be a focal point of bacterial competition. Microbes could quickly capture the nutrition to outcompete their competitors or efficiently cross-feed to cooperate with other bacterial species. However, how interspecies trophic patterns shape the bacterial interactions in the co-occurrence network re ...
microbialcommunities, etc ; denitrification; polymers; sludge; wastewater treatment; Show all 5 Subjects
Abstract:
... Aerobic granular sludge (AGS) has excellent performance in wastewater treatment. However, the formation and mechanism of AGS by effluent reflux are not fully understood in sequential batch reactors (SBRs). In this study, two reactors were constructed, among which R1 was the control group, and the R2 reactor refluxed one-fourth of the supernatant of the effluent to the influent water. In the reacto ...
microbialcommunities, etc ; biotechnology; evolution; microbiome; models; physiology; symbionts; Show all 7 Subjects
Abstract:
... The aggregation of prokaryotic and eukaryotic cells has resulted in evolution of organisms with remarkable abilities to synthetize natural bioactive compounds of biotechnological relevance. Marine sponges such as Petrosia ficiformis are examples of this evolutionary strategy. The P. ficiformis microbiome, which produces a diversity of chemical compounds, plays a fundamental role in this sponge’s e ...
microbialcommunities, etc ; anaerobic digestion; antibiotics; greenhouse gas emissions; Show all 4 Subjects
Abstract:
... This study aimed to investigate the antibiotic of sulfachloropyridazine (SCP) reduction and its effects on volatile fatty acids (VFAs) accumulation and microbial community structures during the process of anaerobic digestion (AD) producing VFA. Results showed that initial SCP concentrations have a positive correlation with reduction of SCP and accumulation of VFAs. The removal rates of SCP were 22 ...
microbialcommunities, etc ; Bacteroidales; butyrates; digestive system; intestinal microorganisms; Show all 5 Subjects
Abstract:
... The factors and mechanisms that shape the composition and function of closely related members in a complex microbial community are largely unknown. The study by Park and colleagues reveals that the fitness of various Bacteroidales species and strains in the gut microbiome is regulated by butyrate in a glycan-dependent manner. ...
microbialcommunities, etc ; batch fermentation; food waste; lactic acid; Show all 4 Subjects
Abstract:
... The effectiveness of producing n-caproate from food waste without external electron donors (EDs) was investigated through batch and semi-continuous fermentation. The maximum concentration of n-caproate reached 10,226.28 mg COD/L during semi-continuous fermentation. The specificity for n-caproate was the highest at 40.19 ± 3.95%, and the soluble COD conversion rate of n-caproate reached up to 22.50 ...