Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 160934 - 160934
Опубликована: Фев. 1, 2025
Язык: Английский
Renewable and Sustainable Energy Reviews, Год журнала: 2023, Номер 185, С. 113638 - 113638
Опубликована: Авг. 17, 2023
The wastewater sector accounts for up to 7 and 10% of anthropogenic CH4 N2O emissions, respectively. Nowadays treatment plants are going through a paradigm shift approach net-zero carbon condition. Numerous ongoing measures have taken place identify the sources greenhouse gases minimize footprint. This paper systematically reviews all known practices leading towards treatment. gas emissions from identified footprint quantification tools, such as reliable models emission factors compared. direct process can contribute over 60% in plants, while around 30% is due energy-related indirect emissions. Therefore, mitigation via optimization energy usage comprehensively described. implantation novel nitrogen removal processes reduce both consumption. Other techniques source separation systems potentially allow by avoiding energy-intensive fertilizer production. Nutrient recovery methods another which offer negative value net Recovering production promising method lead reductions. Ultimately, achieve full decarbonization any remaining need be offset, including chemicals transportation.
Язык: Английский
Процитировано
50
Journal of Molecular Liquids, Год журнала: 2024, Номер 400, С. 124532 - 124532
Опубликована: Март 22, 2024
Язык: Английский
Процитировано
16
Chemical Engineering Journal, Год журнала: 2025, Номер 505, С. 159612 - 159612
Опубликована: Янв. 15, 2025
Язык: Английский
Процитировано
6
Water Research X, Год журнала: 2025, Номер 27, С. 100306 - 100306
Опубликована: Янв. 22, 2025
Solid carbon-driven biofilm system can provide sufficient carbon source for denitrification, while its counter-diffusional structure could inevitably induce the delayed carbon-nitrogen contact and electron transport, further affecting footprints mainly contributed by nitrous oxide (N2O) at wastewater treatment plants (WWTPs). However, detailed understanding of N2O dynamics during solid-phase denitrification (SPD) has not been disclosed. In this work, a fixed bed bioreactor driven polycaprolactone (PCL) was constructed operated over 180 days, achieving 97 %-99 % total nitrogen (TN) removal efficiency. Biochemical results indicated that under condition each (NO x ) concentration maintained 30 mg-N/L, competition between upstream downstream pools still observed PCL-driven even providing source. For example, coexistent nitrate (NO3 -)+ nitrite (NO2 -)+N2O condition, few electrons (i.e., 12.6 %) distributed to reductase (Nos), significantly decreasing reduction rate 1.42 mg/g VSS/h). Under TN in scheme containing NO3 -+NO2 -+N2O be 1.75-2.3 times higher than with sole NO mg-N/L. This suggested when treating multiple , only relatively improve efficiency, but also alleviate emissions. The abundance Bacteroidota Comamonadaceae ensured stable release conversion states.
Язык: Английский
Процитировано
3
Journal of Hazardous Materials, Год журнала: 2023, Номер 465, С. 133059 - 133059
Опубликована: Ноя. 22, 2023
Язык: Английский
Процитировано
26
Environmental Science and Ecotechnology, Год журнала: 2023, Номер 20, С. 100341 - 100341
Опубликована: Ноя. 13, 2023
Municipal wastewater treatment plays an indispensable role in enhancing water quality by eliminating contaminants. While the process is vital, its environmental footprint, especially terms of greenhouse gas (GHG) emissions, remains underexplored. Here we offer a comprehensive assessment GHG emissions from plants (WWTPs) across China. Our analyses reveal estimated 1.54 (0.92–2.65) × 104 Gg release GHGs (CO2-eq) 2020, with dominant contribution N2O and electricity consumption. We can foresee 60–65 % reduction potential promising advancements treatment, such as cutting-edge biological techniques, intelligent strategies, shift towards renewable energy sources.
Язык: Английский
Процитировано
25
Environmental Science & Technology, Год журнала: 2024, Номер 58(4), С. 1954 - 1965
Опубликована: Янв. 19, 2024
Partial nitritation (PN) is an important partner with anammox in the sidestream line treating high-strength wastewater and primarily contributes to nitrous oxide (N2O) emissions such a hybrid system, which also suffers from ubiquitous microplastics because of growing usage disposal levels plastics. In this study, influences polyvinyl chloride (PVC-MPs) on N2O-contributing pathways were experimentally revealed fill knowledge gap N2O emission PN system under stress. The long-term results showed that overall performance was hardly affected by low-dose PVC-MPs (0.5 mg/L) while obviously deteriorated high dose (5 mg/L). According batch tests, reduced biomass-specific ammonia oxidation rates (AORs) 5.78–21.94% stimulated aerobic production 9.22–88.36%. Further, upon increasing dissolved oxygen concentrations 0.3 0.9 mg O2/L, degree AOR inhibition increased but stimulation lightened. Site preference analysis combination metabolic inhibitors demonstrated contributions hydroxylamine heterotrophic denitrification at O2/L enhanced 18.84 10.34%, respectively, accompanied corresponding decreased contribution nitrifier denitrification. Finally, underlying mechanisms proposed for negative bisphenol A leaching reactive species production, led more cell death, altered sludge properties, reshaped microbial communities, further resulting emission. Overall, work implied are hidden danger cannot be ignored system.
Язык: Английский
Процитировано
13
Nature Water, Год журнала: 2024, Номер 2(10), С. 927 - 935
Опубликована: Окт. 10, 2024
Язык: Английский
Процитировано
12
Environmental Science & Technology Letters, Год журнала: 2024, Номер unknown
Опубликована: Июнь 10, 2024
Despite the increasing concern about impacts of microplastics on wastewater treatment, underlying mechanism by which affect nitrous oxide (N2O) accumulation during denitrification is still underexplored. In particular, effects biodegradable (BMPs) sewage sludge systems are largely overlooked. Previous studies often used one type polymer as model microplastics, far from a real-world scenario various occurring simultaneously. This work assesses toxic influences chronically adding four typical BMPs versus conventional nonbiodegradable (NBMPs) to denitrifying sludge. Our results showed that both and NBMPs suppressed performance, intensified electron competition, regulated distribution, consequently promoted N2O at chemical oxygen demand:nitrate ratio <4:1. Importantly, more severe were observed in reactor with BMPs. A subsequent mechanistic study revealed significantly decreased relative abundances denitrifiers key genes involved transport consumption system (ETCS), might be related varied extracellular polymeric substance components. contrast, damaged bacterial membranes directly caused dead cells overproducing reactive species, hence disrupting ETCS. Overall, this suggested wastewater, especially BMPs, could disrupt potentially increase greenhouse gas emission.
Язык: Английский
Процитировано
8
Current Opinion in Green and Sustainable Chemistry, Год журнала: 2025, Номер unknown, С. 101000 - 101000
Опубликована: Янв. 1, 2025
Язык: Английский
Процитировано
1