Deciphering carbon emissions in urban sewer networks: Bridging urban sewer networks with city-wide environmental dynamics

Water Research, Journal Year: 2024, Volume and Issue: 256, P. 121576 - 121576

Published: April 6, 2024

Language: Английский

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Reducing sulfide and methane production in gravity sewer sediments through urine separation, collection and intermittent dosing

Water Research, Journal Year: 2023, Volume and Issue: 234, P. 119820 - 119820

Published: Feb. 28, 2023

Language: Английский

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A critical review of chemical uses in urban sewer systems

Water Research, Journal Year: 2023, Volume and Issue: 240, P. 120108 - 120108

Published: May 21, 2023

Chemical dosing is the most used strategy for sulfide and methane abatement in urban sewer systems. Although conventional physicochemical methods, such as oxidation (e.g., oxygen/nitrate), precipitation iron salts), pH elevation magnesium hydroxide/sodium hydroxide) have been since last century, high chemical cost, large environmental footprint, side-effects on downstream treatment processes demand a sustainable cost-effective alternative to these approaches. In this paper, we aimed review currently chemicals significant progress made technology, including 1) use of bio-inhibitors, 2) situ production, 3) an effective strategy. To enhance cost-effectiveness applications systems, two research directions emerged: online control optimization strategies integrated wastewater The integration approaches offers considerable system-wide benefits; however, further development comprehensive studies are required.

Language: Английский

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In-sewer stability assessment of 140 pharmaceuticals, personal care products, pesticides and their metabolites: Implications for wastewater-based epidemiology biomarker screening

Environment International, Journal Year: 2024, Volume and Issue: 184, P. 108465 - 108465

Published: Jan. 30, 2024

The monitoring of pharmaceuticals, personal care products (PCPs), pesticides, and their metabolites through wastewater-based epidemiology (WBE) provides timely information on pharmaceutical consumption patterns, chronic disease treatment rates, antibiotic usage, exposure to harmful chemicals. However, before applying them for quantitative WBE back-estimation, it is necessary understand stability in the sewer system screen suitable biomarkers thereby reducing research uncertainty. This study investigated in-sewer 140 typical PCPs, across 15 subcategories, using a series laboratory sediment biofilm reactors. For first time, results 89 these compounds were reported. Among target compounds, 61 demonstrated high all reactors, while 41 significantly removed merely by processes. exhibiting notable attenuation, influence processes was generally more pronounced than biofilm, due its stronger microbial activities diffusion or adsorption Adsorption emerged as predominant factor causing biomarker removal compared biodegradation diffusion. Significantly different organic carbon-water partitioning coefficient (K

Language: Английский

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Methane mitigation via the nitrite-DAMO process induced by nitrate dosing in sewers

Water Research, Journal Year: 2024, Volume and Issue: 257, P. 121701 - 121701

Published: April 30, 2024

Language: Английский

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Sulfur-containing substances in sewers: Transformation, transportation, and remediation

Journal of Hazardous Materials, Journal Year: 2024, Volume and Issue: 467, P. 133618 - 133618

Published: Jan. 26, 2024

Language: Английский

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Stability and WBE biomarkers possibility of 17 antiviral drugs in sewage and gravity sewers

Water Research, Journal Year: 2023, Volume and Issue: 238, P. 120023 - 120023

Published: April 30, 2023

Language: Английский

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Sewer sediment adhesion reduction and hydraulic floating promotion by alkaline treatment

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 893, P. 164896 - 164896

Published: June 15, 2023

Language: Английский

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Nitrite-dependent microbial utilization for simultaneous removal of sulfide and methane in sewers

Water Research X, Journal Year: 2024, Volume and Issue: 24, P. 100231 - 100231

Published: June 30, 2024

Chemicals are commonly dosed in sewer systems to reduce the emission of hydrogen sulfide (H2S) and methane (CH4), incurring high costs environmental concerns. Nitrite dosing is a promising approach as nitrite can be produced from urine wastewater, which feasible integrated water management strategy. However, usually requires strict conditions, e.g., relatively concentration (e.g., ∼200 mg N/L) acidic environment, inhibit microorganisms. In contrast "microbial inhibition", this study proposes utilization" concept, i.e., utilizing substrate for H2S CH4 consumption sewer. laboratory-scale reactor, at low concentrations 25–48 N/L was continuously dosed. Two nitrite-dependent microbial utilization processes, anaerobic oxidation (n-DAMO) oxidation, successfully occurred conjunction with reduction. The occurrence both processes achieved 58 % reduction dissolved over 90 removal activities measured 15.6 CH4/(L·h) 29.4 S/(L·h), respectively. High copy numbers n-DAMO bacteria sulfide-oxidizing (SOB) were detected biofilms sediments. Mechanism analysis confirmed that level did not cause inhibition sulfidogenic process due downward migration activity zones Therefore, proposed concept offers new alternative simultaneous sewers.

Language: Английский

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Machine learning for high-precision simulation of dissolved organic matter in sewer: Overcoming data restrictions with generative adversarial networks

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 947, P. 174469 - 174469

Published: July 6, 2024

Language: Английский

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