Self-Cleansing Sewer Design Based on Sediment Transport Principles

Butler, David; May, R.W.P.; Ackers, John

doi:10.1061/(asce)0733-9429(2003)129:4(276)

Cited by 91 publications

(50 citation statements)

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“…The smallest outflow rate (32?2 m 3 /day) is almost one sixth of the largest outflow (180?7 m 3 /day) and would therefore require significantly different wastewater infrastructure capacity -that is, the internal diameter of the pipes may need to be changed in order to avoid operational difficulties. In other words, if the capacity of the wastewater infrastructure had been designed to levels required for design DC5-d (highest outflow in absence of greywater recycling, Figure 7) and yet the development performed to levels in DC4-d (lowest outflow in absence of greywater recycling) it may not be sufficient to self-cleanse (Butler et al, 2003;Butler and Davies, 2011). The largest reduction in outflow, and thus the greatest impact achieved through adoption of a greywater system, occurs in DC4-d when all greywater is recycled.…”

Section: Greywater Recycling and Wastewater Infrastructure Requirementsmentioning

confidence: 99%

Urban futures and the code for sustainable homes

Hunt

Lombardi

Farmani

et al. 2012

Proceedings of the Institution of Civil Engineers - Engineering

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A 6?6 ha (66 000 m 2 ) regeneration site, commonly referred to as Luneside East, is to be turned from a run down, economically under-achieving area of Lancaster, UK, into a new, distinctive, vibrant, sustainable quarter of the city. As a result several aspects of water planning for 350 new homes and 8000 m 2 of workspace needed to be considered before any infrastructure investment was undertaken. This included assessment of the future capacity requirements (i.e. inflows and outflows) for water infrastructure (i.e. mains water supply, wastewater disposal, rainwater storage and stormwater disposal) much of which will be located underground. This paper looks at the implications of various water management strategies on the Luneside East site (e.g. water-efficient appliances, greywater recycling and rainwater harvesting) in line with current policy measures that focus on technology changes alone (e.g. the code for sustainable homes). Based on these findings this paper outlines some basic implications for technological resilience discussed in the context of four 'world views' -that is, the urban futures scenarios considered in this special issue.Conclusions are drawn as to how far this can take engineers, planners and developers in understanding and planning for resilient water infrastructure within a development like Luneside East.

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Section: Greywater Recycling and Wastewater Infrastructure Requirementsmentioning

confidence: 99%

Urban futures and the code for sustainable homes

Hunt

Lombardi

Farmani

et al. 2012

Proceedings of the Institution of Civil Engineers - Engineering

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“…doi: 10.2166/wst.2008.287 Allowing some deposition to occur appears to be a viable alternative, because the presence of the deposited bed can significantly increase the sediment transporting capacity of the pipe, despite the adverse effect it might have on the geometry and hydraulic roughness (Butler et al 2003).…”

Section: Introductionmentioning

confidence: 99%

Hydraulic performance of sewer pipes with deposited sediments

Banasiak

2008

Water Science and Technology

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This paper investigates in-sewer sediment deposit behaviour and its influence on the hydraulic performance of sewer pipes. This evaluation is based on experimental results regarding the mobility of non-cohesive and partly cohesive deposits in a partially full circular pipe. The focus of these tests is on the development of bed forms and friction characteristics. In particular, it is investigated to what extent the bed forms from the non-cohesive and (partly) cohesive sediments affect a sewer's discharge capacity. Based on the laboratory study results and on the existing criteria for sewer design, a generic assessment of a sewer's hydraulic performance is made. The relative discharge factor for a pipe with sediment deposit is analysed in terms of the thickness and roughness of the deposit.

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“…The self-cleansing process in the wastewater system must establish a balance between the amount of sediment and the rate of erosion during the sediment transport and, in a specific period of time, minimize the combined costs of construction, operation, and maintenance of the system (Butler et al, 2003). The most important aspect of these requirements is that if a minimum amount of sediment allows the design of the wastewater system to become more economical, there is no need for the sewer conduits to stay completely free of deposits.…”

Section: Self-cleansing Design Conceptmentioning

confidence: 99%

Design criteria for sediment transport in sewers based on self-cleansing concept

Ebtehaj

Bonakdari

Sharifi

2014

J. Zhejiang Univ. Sci. A

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This study of bed-load transport was undertaken on the basis of laboratory data in two states, i.e., limit of deposition and deposited bed, by using new design criteria, whereby, compared to earlier similar studies, fewer parameters were considered, yet with almost the same or in some cases an even greater level of accuracy. The modified criterion in the new design for transport in the limit of deposition was using only three dimensionless parameters, i.e., Froude number, volumetric concentration of sediment, and relative size of the grain. But the new design criterion applied to the deposited bed case used four dimensionless parameters, i.e., three parameters used for the preliminary case besides the relative thickness of sedimentation. Compared with other known relationships in sediment transport, the produced equations introduced here yield better results than previous studies. With the lessened number of parameters, the results are much easier to obtain.

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Self-Cleansing Sewer Design Based on Sediment Transport Principles

Cited by 91 publications

References 10 publications

Urban futures and the code for sustainable homes

Urban futures and the code for sustainable homes

Hydraulic performance of sewer pipes with deposited sediments

Design criteria for sediment transport in sewers based on self-cleansing concept

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