Abstract:
:Decreasing per capita water consumption in several OECD countries has led to a notable flow reduction into sewer systems. However, sewers still transport similar quantities of solids and pollutants, leading to increased wastewater concentration and, potentially, excess solids deposition. The shift towards decentralised water schemes in cities and widely reported changes in rainfall patterns cast additional uncertainty on future wastewater quality and flows into sewers. Excess solids deposition in sewers can cause increased environmental pollution risks at Combined Sewer Overflows from solids resuspension and reduced sewer hydraulic capacities. This review analyses the magnitude of excess solids deposition due to changing wastewater composition and evaluates current approaches to modelling sewer solids. Gaps in commonly used modelling approaches for deposited bed processes, specifically in bed consolidation and bed particle cohesion processes, and gross solids transport were identified and addressed to enable better solids risk prediction and management.
journal_name
J Environ Managejournal_title
Journal of environmental managementauthors
Murali MK,Hipsey MR,Ghadouani A,Yuan Zdoi
10.1016/j.jenvman.2019.03.120subject
Has Abstractpub_date
2019-06-15 00:00:00pages
219-230eissn
0301-4797issn
1095-8630pii
S0301-4797(19)30433-5journal_volume
240pub_type
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