Research progress and prospect of low-carbon biological technology for nitrate removal in wastewater treatment

Frontiers of Environmental Science & Engineering, Год журнала: 2024, Номер 18(7)

Опубликована: Март 25, 2024

Abstract Wastewater treatment plants are the major energy consumers and significant sources of greenhouse gas emissions, among which biological nitrogen removal wastewater is an important contributor to carbon emissions. However, traditional heterotrophic denitrification still has problems excessive residual sludge requirement external sources. Consequently, development innovative low-carbon nitrate technologies necessary. This review outlines key roles sulfur autotrophic hydrogen in treatment. The discovered nitrate/nitrite dependent anaerobic methane oxidation enables sustainable emission reduction by utilizing available situ . Photosynthetic microorganisms exhibited a promising potential achieve carbon-negative removal. Specifically, algal-bacterial symbiosis system photogranules offer effective prospective options for Then, emerging technology photoelectrotrophic underlying photoelectron transfer mechanisms discussed. Finally, we summarize prospect these technologies, highlighting that solar-driven area future guiding significance design systems.

Язык: Английский

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

Water Research X, Год журнала: 2024, Номер 24, С. 100231 - 100231

Опубликована: Июнь 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.

Язык: Английский

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Autotrophic-Heterotrophic Synergies in Electrically Stimulated Denitrification Anaerobic Methane Oxidation Systems for Enhanced Nitrogen and Methane Removal

Journal of environmental chemical engineering, Год журнала: 2025, Номер unknown, С. 116234 - 116234

Опубликована: Март 1, 2025

Язык: Английский

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Optimizing airflow rate and carbon source dosage strategies for wastewater treatment plant: Toward carbon emission reduction and enhanced nitrogen removal

Journal of Water Process Engineering, Год журнала: 2025, Номер 72, С. 107513 - 107513

Опубликована: Март 19, 2025

Язык: Английский

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Fate of organic nitrogen in amino acids during alternating denitrification and nitrification

International Biodeterioration & Biodegradation, Год журнала: 2024, Номер 193, С. 105850 - 105850

Опубликована: Июнь 30, 2024

Язык: Английский

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Evaluation of the Environmental Impact and Energy Utilization Efficiency of Wastewater Treatment Plants in Tumen River Basin Based on a Life Cycle Assessment + Data Envelopment Analysis Model

Sustainability, Год журнала: 2024, Номер 16(4), С. 1690 - 1690

Опубликована: Фев. 19, 2024

The environmental impacts from energy consumption account for a high percentage of the wastewater treatment plants (WWTPs) throughout their life cycle; therefore, controlling use in WWTPs could bring substantial benefits to environment. In this study, according different percentages electricity generation renewable compared fossil energy, global warming, acidification, eutrophication, human toxicity, and photochemical smog, WWTP operation were considered. Furthermore, explore more sustainable way operating under “dual-carbon” strategic decision, utilization efficiency power allocation scenarios at present next 40 years based on LCA+DEA integrated model. study revealed that 1–5, as proportion gradually increased, all LCA results showed gradual decrease, which GWP decreased by 83.32% toxicity 93.34%. However, 2–5, contribution ratio (proportion) gas POCP reaching 77.11% 59.44%, respectively, scenario 5. biomass AP EP increased well, 65.22% 68.75%, Meanwhile, combined technical five decreasing trend; only 1 was fully efficient, 1. values 2, 3, 4, 5 0.7386, 0.4771, 0.2967, 0.1673, respectively. This discusses whether place elicits an impact WWTPs. We feasibility achieving savings emission reductions within Tumen River Basin, provide theoretical basis development.

Язык: Английский

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Food wastewater treatment using a hybrid biofilm reactor: nutrient removal performance and functional microorganisms on filler biofilm and suspended sludge

RSC Advances, Год журнала: 2024, Номер 14(31), С. 22470 - 22479

Опубликована: Янв. 1, 2024

In this study, a laboratory-scale hybrid biofilm reactor (HBR) was constructed to treat food wastewater (FWW) before it is discharged into the sewer.

Язык: Английский

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Novel sulfide-driven denitrification methane oxidation (SDMO) system based on SBR-MBfR and EGSB-MBfR

Chemical Engineering Journal, Год журнала: 2024, Номер unknown, С. 155948 - 155948

Опубликована: Сен. 1, 2024

Язык: Английский

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Fate of Organic Nitrogen in Amino Acids During Alternating Denitrification and Nitrification

Опубликована: Янв. 1, 2024

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Язык: Английский

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Novel Sulfide-Driven Denitrification Methane Oxidation (Sdmo) System Based on Sbr-Mbfr and Egsb-Mbfr

Опубликована: Янв. 1, 2024

Язык: Английский

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