Characteristics of the chromophoric dissolved organic matter of urban black-odor rivers using fluorescence and UV–visible spectroscopy

Miao, Shihai; Lyu, Heng; Xu, Jie; Bi, Shun; Guo, Honglei; Mu, Meng; Lei, Shaohua; Zeng, Shuai; Liu, Huaiqing

doi:10.1016/j.envpol.2020.115763

Cited by 21 publications

(7 citation statements)

References 51 publications

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“…Region I mainly represents soluble microbial metabolites, while region II represents humic acids 24‐26 . The components present in region I include proteins, coenzymes, small‐molecule organic acids, pigments, etc 27 . Region II mainly includes humic acid, polycyclic aromatic hydrocarbons and fulvic acid in the visible region, as well as other organic substances with high molecular weight and high degree of aromatization 28,29 .…”

Section: Resultsmentioning

confidence: 99%

“…[24][25][26] The components present in region I include proteins, coenzymes, small-molecule organic acids, pigments, etc. 27 Region II mainly includes humic acid, polycyclic aromatic hydrocarbons and fulvic acid in the visible region, as well as other organic substances with high molecular weight and high degree of aromatization. 28,29 Figure 3(a) shows that the fluorescence spectra of T, RL and T-groups showed obvious intra-group similarity and inter-group difference.…”

Section: Effect Of Pretreatment On Organic Composition Of Wasmentioning

confidence: 99%

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Study on anaerobic fermentation of waste activated sludge to produce volatile fatty acids by thermal–rhamnolipid treatment

Chuanchuan

Liu

Zhao

et al. 2023

J of Chemical Tech & Biotech

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BACKGROUND The extracellular polymer and cell wall of waste activated sludge serve as chemical barriers for anaerobic fermentation, limiting the recycling and utilization of organic carbon contained in the sludge. To improve the efficiency of anaerobic fermentation, this paper proposes thermal–rhamnolipid (T‐RL) pretreatment technology and systematically discusses the effect of T‐RL treatment on the anaerobic fermentation of waste activated sludge for acid production from the perspective of organic matter dissolution characteristics, total volatile fatty acid (VFA) content, composition and microbial changes. RESULTS T‐RL treatment significantly promoted the dissolution of organic matter in sludge, with soluble chemical oxygen demand solubilizing to 6097.78–7375.56 mg L−1, soluble carbohydrates solubilizing to 207.38–274.74 mg L−1, and the dissolution of soluble proteins and DNA also at a high level. Both treatment factors significantly promoted the enrichment of acid‐producing microorganisms, especially acetic acid‐producing microorganisms. The best VFA production conditions of T‐RL treatment were 60 mg g−1 total solids and 70 °C, and the yield was 3294.96 mg L−1. Compared with thermal and RL treatments, the optimum yield of T‐RL treatment increased by 33.16% and 22.06%, respectively. The VFA components in the T‐RL group were mainly acetic acid and propionic acid. Under optimal conditions, the proportion of acetic acid and propionic acid reached 77%. CONCLUSION T‐RL treatment can promote sludge disintegration and organic matter conversion through the coupling effect of thermal and RL treatments, providing sufficient and high‐quality substrate for acid‐producing microorganisms, effectively enriching VFA producers, and thus improving the efficiency of anaerobic fermentation for VFA production. This treatment technology will provide some beneficial references for the future utilization of sludge resources. © 2023 Society of Chemical Industry (SCI).

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Section: Resultsmentioning

confidence: 99%

Section: Effect Of Pretreatment On Organic Composition Of Wasmentioning

confidence: 99%

Study on anaerobic fermentation of waste activated sludge to produce volatile fatty acids by thermal–rhamnolipid treatment

Chuanchuan

Liu

Zhao

et al. 2023

J of Chemical Tech & Biotech

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“…22 In engineering applications, current river substrate remediation methods mainly include in situ and ex situ remediation. 23 In this study, a combination of in situ and ex situ remediation was used for the fundamental removal of black odor from waterbodies.…”

Section: Interception and Source Controlmentioning

confidence: 99%

Combined biological contact oxidation pool process to treat black-odor waterbodies

Li,

Huang,

Shi

et al. 2024

Environ. Sci.: Water Res. Technol.

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“…Wuxi is located at the northeastern corner of Taihu Lake with a population density of 1671 per km 2 , which is an industrial hub that accommodates thousands of factories. Rivers in Wuxi mainly flow into Lake Taihu, thus directly affecting the water quality of the lake [33]. Changsha (111 • 53 -114 • 5 E, 27 • 51 -28 • 40 N) is located in the northeastern part of Hunan Province, and is an important central city in the middle reaches of the Yangtze River, with an urbanized area of 374.64 km 2 and a population density of 617 per km 2 .…”

Section: Study Areamentioning

confidence: 99%

Urban Water Quality Assessment Based on Remote Sensing Reflectance Optical Classification

Cai

et al. 2021

Remote Sensing

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With the acceleration of urbanization, increasing water pollution means that monitoring and evaluating urban water quality are of great importance. Although highly accurate, traditional evaluation methods are time consuming, laborious, and vastly insufficient in terms of the continuity of spatiotemporal coverage. In this study, a water quality assessment method based on remote sensing reflectance optical classification and the traditional grading principle is proposed. In this method, an optical water type (OWT) library was first constructed using the measured in situ remote sensing reflectance dataset based on fuzzy clustering technology. Then, comprehensive scoring rules were established by combining OWTs and 12 water quality parameters, and water quality was graded into different urban water quality levels (UWQLs) based on the scoring results. Using the proposed method, the relative water quality of urban waterbodies was qualitatively evaluated at the macro level based on images from the multispectral imager of Sentinel-2. In addition, there was a significant positive correlation between the UWQLs and the water quality index (WQI). These results indicate the potential of this method for quantitative assessment of urban water quality, providing a new way to evaluate water quality using remote sensing algorithms in the future.

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Characteristics of the chromophoric dissolved organic matter of urban black-odor rivers using fluorescence and UV–visible spectroscopy

Cited by 21 publications

References 51 publications

Study on anaerobic fermentation of waste activated sludge to produce volatile fatty acids by thermal–rhamnolipid treatment

Study on anaerobic fermentation of waste activated sludge to produce volatile fatty acids by thermal–rhamnolipid treatment

Combined biological contact oxidation pool process to treat black-odor waterbodies

Urban Water Quality Assessment Based on Remote Sensing Reflectance Optical Classification

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