Nitrous Oxide Production at a Fully Covered Wastewater Treatment Plant: Results of a Long-Term Online Monitoring Campaign

Kosonen, Heta; Heinonen, Mari; Mikola, Anna; Haimi, Henri; Mulas, Michela; Corona, Francesco; Vahala, Riku

doi:10.1021/acs.est.5b04466

Cited by 87 publications

(68 citation statements)

References 38 publications

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“…0, electricity accounts for 35% of the total impact and the total plant greenhouse gas (GHG) emissions for 56%. According to our measurements, the N 2 O emissions comprised 80% of the total emissions, which is in line with the results reported by Kosonen et al (2016). Remaining impacts are characterized as follow: composting (4.5%), effluent release (2.3%), transport (1.5%) and production of chemicals used (1.3%).…”

Section: Global Warming Potentialsupporting

confidence: 90%

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Is SCENA a good approach for side-stream integrated treatment from an environmental and economic point of view?

Longo

Frison

Renzi³

et al. 2017

Water Research

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The environmental and economic benefits and burdens of including the first Short Cut Enhanced Nutrient Abatement (SCENA) into a real municipal wastewater treatment plant were evaluated using life cycle assessment (LCA) and life cycle cost (LCC). The implications of accomplishing nitrogen (N) removal and phosphorus (P) recovery via nitrite in the side stream were assessed taking into account the actual effluent quality improvement, the changes in the electricity and chemical consumption, NO, CO and CH emissions and the effects of land application of biosolids, among others. In addition, a case-specific estimation of the P availability when sludge is applied to land, therefore replacing conventional fertilizer, was performed. Furthermore, to account for the variability in input parameters, and to address the related uncertainties, Monte Carlo simulation was applied. The analysis revealed that SCENA in the side stream is an economic and environmentally friendly solution compared to the traditional plant layout with no side-stream treatment, thanks to the reduction of energy and chemical use for the removal of N and P, respectively. The uncertainty analysis proved the validity of the LCA results for global warming potential and impact categories related to the consumption of fossil-based electricity and chemicals, while robust conclusions could not be drawn on freshwater eutrophication and toxicity-related impact categories. Furthermore, three optimization scenarios were also evaluated proving that the performance of the WWTP can be further improved by, for instance, substituting gravitational for mechanical thickening of the sludge or changing the operational strategy to the chemically enhanced primary treatment, although this second alternative will increase the operational cost by 5%. Finally, the outcomes show that shifting P removal from chemical precipitation in the main line to biologically enhanced uptake in the side stream is key to reducing chemicals use, thus the operational cost, and increasing the environmental benefit of synthetic fertilizers replacement.

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Section: Global Warming Potentialsupporting

confidence: 90%

“…for influent N (Kosonen et al 2016). In the scSBR of the SCENA system, the N 2 O emissions were 1.42% of the N influent load of the side-stream line, which is in accordance with the range of 0.24-1.49% previously measured by Frison et al (2015).…”

Section: Inventory Analysismentioning

confidence: 99%

Is SCENA a good approach for side-stream integrated treatment from an environmental and economic point of view?

Longo

Frison

Renzi³

et al. 2017

Water Research

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“…A 12-month online monitoring of N2O production at a fully covered WWTP had showed an annual N2O emissions of 168 g/PE/year and an emission factor of 1.9% of the influent nitrogen (N) load, which was in good agreement with other full-scale WWTPs with long-term online monitoring (Kosonen et al, 2016).…”

Section: Ghg Emissions From Wwtpssupporting

confidence: 65%

Gaseous Emissions from Wastewater Facilities

Koh¹,

Shaw²

2017

Water Environment Research

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A review of the literature published in 2016 on topics relating to gaseous emissions from wastewater facilities is presented. This review is divided into the following sections: odorant emissions from wastewater treatment plants (WWTPs); greenhouse gas (GHG) emissions from WWTPs; gaseous emissions from wastewater collection systems; physiochemical odor/emissions control methods; biological odor/emissions control methods; odor characterization/monitoring; and odor impacts/ risk assessments.

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“…In the current study, N 2 O gas from wastewater treatment using the activated sludge process was monitored for one year. Kosonen et al reported annual N 2 O emissions of 168 g/PE/year and 0.019 g N 2 O-N/g N load from a fully covered underground wastewater treatment plant [5]. Daelman et al reported N 2 O emissions of 0.028 g N 2 O-N/g N load from a full-scale municipal wastewater treatment plant [3].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Nitrous Oxide Emission Reduction Potential of an Aerobic Bioreactor Packed with Carbon Fibres for Swine Wastewater Treatment

Yamashita

Shiraishi²,

Yokoyama

et al. 2019

Energies

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Nitrous oxide (N 2 O) is a potent greenhouse gas that is emitted from wastewater treatment plants. To reduce emissions of N 2 O from swine wastewater treatment plants, we constructed an experimental aerobic bioreactor packed with carbon fibres (ca. 1 m 3 bioreactor) as an alternative to conventional activated sludge treatment. The N 2 O emission factor for the aerobic bioreactor packed with carbon fibres (CF) was 0.002 g N 2 O-N/g TN-load and the value for the typical activated sludge (AS) reactor was 0.013 g N 2 O-N/g TN-load. The CF treatment method achieved more than 80% reduction of N 2 O emissions, compared with the AS treatment method. The experimental introduction of a CF carrier into an actual wastewater treatment plant also resulted in a large reduction in N 2 O generation. Specifically, the N 2 O emission factors decreased from 0.040 to 0.005 g N 2 O-N/g TN-load following application of the carrier. This shows that it is possible to reduce N 2 O generation by more than 80% by using a CF carrier during the operation of an actual wastewater treatment plant. Some bacteria from the phylum Chloroflexi, which are capable of reducing N 2 O emissions, were detected at a higher frequency in the biofilm on the CF carrier than in the biofilm formed on the AS reactor.

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Nitrous Oxide Production at a Fully Covered Wastewater Treatment Plant: Results of a Long-Term Online Monitoring Campaign

Cited by 87 publications

References 38 publications

Is SCENA a good approach for side-stream integrated treatment from an environmental and economic point of view?

Is SCENA a good approach for side-stream integrated treatment from an environmental and economic point of view?

Gaseous Emissions from Wastewater Facilities

Evaluation of the Nitrous Oxide Emission Reduction Potential of an Aerobic Bioreactor Packed with Carbon Fibres for Swine Wastewater Treatment

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