The remediation of urban freshwater sediment by humic-reducing activated sludge

Li, Meng; Sun, Jinsheng; Liu, Chang; Tang, Yinqi; Huang, Jianjun

doi:10.1016/j.envpol.2020.115038

Cited by 10 publications

(5 citation statements)

References 45 publications

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“…Microecological agents commonly used to regulate the activity of microbial communities in water bodies can be broadly classified into three categories—chemicals that supplement the electron acceptors required for microbial respiration, such as nitrate, phosphate and peroxide; agents that supplement the metabolic properties of environmental remediation, such as denitrifying bacteria, photosynthetic bacteria and EM bacteria; or a combination of the above. For example, Li et al (2020) used humus‐reducing activated sludge to facilitate the remediation of urban freshwater sediments, using potassium nitrate and biostimulants to activate humus‐reducing activated sludge, and found that the technique significantly increased the efficiency of total organic matter removal from water column, with an increase in Anaerolineales and Desulfuromonadales bacteria associated with carbon metabolism and electron transfer capacity, and a moderate decrease in bacteria associated with the sulphur/sulphate cycle. Ni et al (2018) found that microbial communities in pond water bodies have important potential in nitrogen metabolism by investigating the pond water body microbiota in South China and concluded that by increasing the microbial metabolic activity could help to remove excess nitrogen from pond water bodies by increasing the denitrification capacity of the water body microbial communities to remove excessive nitrogen in the cultured water column.…”

Section: Discussionmentioning

confidence: 99%

Impact of microecological agents on water environment restoration and microbial community structures of trench system in a Baiyangdian wetland ecosystem

Liu

Xie

et al. 2022

Journal of Applied Microbiology

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Aims To evaluate the effects of periodic application of effective microorganism (EM) bacteria and calcium peroxide on water environment restoration of a trench wetland ecosystem and its impact on microbiota in water and sediment. Methods and Results The EM bacteria and calcium peroxide were alternately sprayed into the trench water, and changes in the physicochemical indices of water and sediment, and in microbiota structure were subsequently investigated. Alternately spraying of calcium peroxide and EM bacteria improved the water quality, especially in terms of the dissolved oxygen and transparency of water body, and could further reduce the levels of total nitrogen, total phosphorus and ammonia nitrogen. At the same time, the microbiota structure of the water body was significantly changed by spraying with calcium peroxide and EM bacteria, and the relative abundances of Pseudanabaena, Legionellaceae, Planktothrix, Planctomyces, Phenylobacterium, Rhodobacter, Rhodoferax and Aquirestis were significantly increased. However, there was no significant effect on the physicochemical indexes and microbiota composition of the sediment. Conclusions The water quality of the Baiyangdian trench could be significantly restored by regular sprinkling of calcium peroxide and EM bacteria. Significance and Impact of Study The results provide an effective technical method for the restoration of trench wetland water.

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Section: Discussionmentioning

confidence: 99%

Impact of microecological agents on water environment restoration and microbial community structures of trench system in a Baiyangdian wetland ecosystem

Liu

Xie

et al. 2022

Journal of Applied Microbiology

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“…However, the degradation of the HFOM could not be achieved without the participation of electroactive bacteria, suggesting that the TailN + CFM + LDO group may have promoted the degradation of the HFOM by inducing electroactive bacteria. The main reason for this was that the extracellular electron transfer of electroactive bacteria enhanced HFOM degradation due to factors such as spatial site resistance or mass transfer [22,23]. Under aeration and denitrification, the DO and ORP in the water column were effectively enhanced, which increased the Fe(III) concentration in the water bodies and induced electroactive bacteria such as Pseudomonas and Thiobacillus.…”

Section: Changes In the Morphology Of Tom In The Sedimentmentioning

confidence: 99%

In-Situ Improvement of the Sediment Microenvironment by Nitrate in Tailwater of Wastewater Treatment Plants Combined with Aerobic Denitrifying Bacteria under Low-DO Regulation

Chen,

Zhang,

Liu

et al. 2024

Water

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Preventing the rebound of black and odorous water bodies is critical for improving the ecological environment of water bodies. This study examined the effect and underlying mechanism of in-situ improvement of the sediment microenvironment by nitrate in the tailwater of wastewater treatment plants combined with aerobic denitrifying bacteria under low-DO regulation (TailN + CFM + LDO). On the 60th day of remediation, the levels of dissolved oxygen and oxidation–reduction potential in the overlying water rose to 5.6 mg/L and 300 mV, respectively, the concentration of acid volatile sulfide within the sediment significantly decreased by 70.4%, and the organic matter content in the sediment was reduced by 62.7%, in which the heavy fraction organic matter was degraded from 105 g/kg to 56 g/kg, and the potential risk of water reverting to black and odorous conditions significantly decreased. Amplicon sequencing analysis revealed that the relative abundance of the electroactive bacteria Thiobacillus and Pseudomonas with denitrification capacity was found to be significantly higher in the TailN + CFM + LDO group than in the other remediation groups. Functional prediction of the 16S sequencing results indicated that both the quantity and activity of critical microbial enzymes involved in nitrification and denitrification processes could be enhanced in the TailN + CFM + LDO group. These results improved our understanding of the improvement of the sediment microenvironment and could thus facilitate its application.

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“…(GGACTACHVGGGTWTCTAAT), targeting the V3-V4 region of the bacterial 16S rDNA genes. Highthroughput sequencing was sequenced using the Illumina Miseq PE300 platform (Illumina, Inc., CA, USA) by Beijing Auwigene Tech Ltd. (Beijing, China) (Li et al 2020).…”

Section: High-throughput Sequencingmentioning

confidence: 99%

“…The heatmap analysis was performed using the gplots package of R. The redundancy analysis (RDA) was carried out using the vegan package of R. The downstream analysis used a non-metric multidimensional scaling (NMDS) method to compare the similarity of these 9 types of sediments with different levels of contamination. The NMDS data were created using the R software project using OTUs from various genera, with the analysis of similarities (Anosim) technique used to see whether the differences between groups were signi cant (Li et al 2020).…”

Section: High-throughput Sequencingmentioning

confidence: 99%

“…Human activities have altered and will continue to alter nitrogen and sulfur cycling by increasing the amount of reactive nitrogen and sulfur in urban river sediments (Nelson et al 2016a). Nitrogen and sulfur cycling in sediment can lead to the formation of odorous thioether and black-colored particles, which are accountable for forming black-odorous rivers (He et al 2022;Li et al 2020). Environmental changes are altering the distribution of biodiversity, which in turn is a crucial driver of biogeochemical cycles ; Yang et al 2022).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Fluorescein diacetate hydrolytic activity as a sensitive tool to quantify nitrogen/sulfur gene content in urban river sediments in China

Zhang

Sun

et al. 2023

Environ Sci Pollut Res

Self Cite

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The relative abundance of functional genes used to quantify the abundance of functional genes in communities is controversial. Quantitative PCR (qPCR) technology offers a powerful tool for quantifying functional gene abundance. However, humic substances can inhibit qPCR in sediment/soil samples. Therefore, nding a convenient and effective quantitative analysis method for sediment/soil samples is necessary. The functional genes and physicochemical properties in sediments with different-level pollutions were analyzed in this study. Correlations between physicochemical properties and the relative abundance of functional genes were used to test whether relative abundance in gene prediction quanti es the abundance of functional genes. The abundance of functional genes could be corrected by multiplying the uorescein diacetate (FDA) hydrolytic rates by the relative abundance of functional genes since the FDA assay has been widely used as a rapid and sensitive method for quantifying microbial activity in sediments. Redundancy analysis showed signi cant interrelations between the functional genes and the physicochemical properties of sediments. The relative abundance of functional genes is unreliable for quantifying the abundance of functional genes because of the weak correlation (R < 0.5, P < 0.05) between different pollutants and the relative abundance of functional genes. However, a signi cant positive correlation between concentrations of different pollutants and the activities of associated enzymes was obtained (R > 0.933, P < 0.05), which revealed that the abundance of functional genes could be reliably quanti ed by the relative abundance and FDA hydrolytic rate. This study proposed an alternative method besides qPCR to quantify the absolute abundance of functional genes, which overcomes the problem of humic interference in the quantitative analysis of sediment/soil samples.

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The remediation of urban freshwater sediment by humic-reducing activated sludge

Cited by 10 publications

References 45 publications

Impact of microecological agents on water environment restoration and microbial community structures of trench system in a Baiyangdian wetland ecosystem

Impact of microecological agents on water environment restoration and microbial community structures of trench system in a Baiyangdian wetland ecosystem

In-Situ Improvement of the Sediment Microenvironment by Nitrate in Tailwater of Wastewater Treatment Plants Combined with Aerobic Denitrifying Bacteria under Low-DO Regulation

Fluorescein diacetate hydrolytic activity as a sensitive tool to quantify nitrogen/sulfur gene content in urban river sediments in China

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