Normalization of Wastewater Quality to Estimate Infiltration/Inflow and Mass Flows of Metals

Mattsson, Jonathan; Mattsson, Ann E.; Davidsson, Fredrik; Hedström, Annelie; Österlund, Heléne; Viklander, Maria

doi:10.1061/(asce)ee.1943-7870.0001120

Cited by 11 publications

(9 citation statements)

References 22 publications

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“…Three quantity factors are related with the amount of contaminants: P is population; Q = V /P is amount of wastewater per capita, reflecting combined effect by habit of people, wastewater collection and treatment rate, ratio of mixed industrial wastewater, and inflow / infiltration / exfiltration condition of sewerage systems [4,49]. It determines the amount of wastewater to treat together with population; C = M /V is the average reduced concentration of COD, representing the condition of removing contaminant in wastewater;…”

Section: Lmdimentioning

confidence: 99%

Increasing and Diverging Greenhouse Gas Emissions of Urban Wastewater Treatment in China

Huang¹,

Liu²,

Meng³

et al. 2022

Preprint

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Upgrading effluent standards of wastewater treatment plants (WWTPs) and repairing sewerage systems leads to contradictions and synergies between water pollution control and climate change mitigation. This affects historical trajectories and characteristics of greenhouse gas (GHG) emissions from China's WWTPs, which stay inadequately studied. Here we establish emissions inventories of China's WWTPs using plant-level WWTP operational data. We find that removed amount of chemical oxygen demand and ammonia nitrogen increased 0.8 and 1.3 times during 2009-2019, while WWTP GHG emissions increased 1.8 times, being 6 times national GHG emissions growth rate. Increasing sludge yield and electricity intensity became primary driving factors in 2015 because of stricter effluent standards and lower influent contaminant concentration. We defined Functional Unit-Gini coefficient to quantify divergence of WWTP GHG emissions, which grew from 0.20 in 2009 to 0.29 in 2019. Diversified sludge disposal methods and energy structure increased the inequality, while upgrading effluent standards decreased it.

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Section: Lmdimentioning

confidence: 99%

Increasing and Diverging Greenhouse Gas Emissions of Urban Wastewater Treatment in China

Huang¹,

Liu²,

Meng³

et al. 2022

Preprint

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“…For estimating I/I volumes, the most suitable methods are those based on analysis of reference flows, or wastewater quality parameters, such as nutrients, electrical conductivity, etc. (De Bénédittis & Bertrand-Krajewski 2005;Mattsson et al 2016;Cahoon & Hanke 2017;Zhang et al 2018b). On the other hand, closed-circuit television (CCTV), visual and smoke inspections provide better information regarding the locations of I/I entry into sewers (Schweiger & Hassell 2004;Mattsson et al 2016).…”

Section: Introductionmentioning

confidence: 99%

“…(De Bénédittis & Bertrand-Krajewski 2005;Mattsson et al 2016;Cahoon & Hanke 2017;Zhang et al 2018b). On the other hand, closed-circuit television (CCTV), visual and smoke inspections provide better information regarding the locations of I/I entry into sewers (Schweiger & Hassell 2004;Mattsson et al 2016). Additionally, distributed temperature sensing (DTS) has the potential to both detect and locate I/I (Schilperoort et al 2013;Panasiuk et al 2015;Beheshti & Saegrov 2019).…”

Section: Introductionmentioning

confidence: 99%

Identifying sources of infiltration and inflow in sanitary sewers in a northern community: comparative assessment of selected methods

Panasiuk

Hedström

Langeveld

et al. 2022

Water Science and Technology

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Infiltration and inflow (I/I) into sanitary sewers causes numerous negative effects on the whole wastewater management system and ultimately, on the receiving waters. Consequently, a number of methods have been developed to analyse the performance of sewer systems with respect to I/I, including: distributed temperature sensing (DTS), closed-circuit television (CCTV) inspections, flow and conductivity measurements, automatic or grab sampling of ammonium, smoke testing, and visual inspection of manholes. Such methods were compared in an application to sanitary sewers in a small community and assessed with respect to their accuracy and ability to identify locations of sources of I/I, as well as temporal and spatial resolutions of the obtained results. Furthermore, different approaches to ammonium sampling during I/I monitoring campaigns were discussed. It was concluded that among the methods tested in this study, DTS had the highest temporal and spatial resolutions, while ammonium grab sampling showed promise for initial screening of large catchments.

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“…Mattsson et al [6] reported levels of dilution of wastewater by I/I from catchments with both mainly separate and mainly combined sewer systems as well as at the inflow to WWTP (approximately 700,000 PE (person equivalent), south Sweden) of around 1.6-2.2 times for the dry period, and from 1.6 up to 8.2 times during the wet weather period. The average I/I share of total influent wastewater to ten big WWTPs in Sweden was around 46% in 2015 with the average share of separate sewers around 80-85%, and 41% in Finland with a 95% share of separate sewer systems [7].…”

Section: Introductionmentioning

confidence: 99%

“…or based on commonly used wastewater quality parameters (e.g., nutrients, conductivity, etc.) [6,[11][12][13][14]. The main drawback of these methods is their low capability to identify I/I locations, which is a prerequisite for being able to remove them.…”

Section: Introductionmentioning

confidence: 99%

Using Distributed Temperature Sensing (DTS) for Locating and Characterising Infiltration and Inflow into Foul Sewers before, during and after Snowmelt Period

Panasiuk

Hedström

Langeveld

et al. 2019

Water

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Infiltration and inflow (I/I) into sewers cause negative effects on the sewer system, wastewater treatment plant and environment. Identifying the causes and locating the inflows is necessary in order to address the I/I problem. This paper focuses on using distributed temperature sensing (DTS) for identifying, locating and characterising I/I into a sewer system during the end of winter–beginning of summer transition period under dry and wet weather conditions. During snowmelt, several locations with I/I were identified, while these locations did not show I/I during storm events after the snowmelt. In addition, during a very heavy storm after the snowmelt period, I/I was found at other locations. Therefore, DTS was demonstrated to be effective in identifying the type of I/I and in locating I/I. Finally, I/I monitoring campaigns in cold climates should take into account the variety of pathways of I/I during snowmelt and during rainfall.

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Normalization of Wastewater Quality to Estimate Infiltration/Inflow and Mass Flows of Metals

Cited by 11 publications

References 22 publications

Increasing and Diverging Greenhouse Gas Emissions of Urban Wastewater Treatment in China

Increasing and Diverging Greenhouse Gas Emissions of Urban Wastewater Treatment in China

Identifying sources of infiltration and inflow in sanitary sewers in a northern community: comparative assessment of selected methods

Using Distributed Temperature Sensing (DTS) for Locating and Characterising Infiltration and Inflow into Foul Sewers before, during and after Snowmelt Period

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