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Practitioner's Tool / Sewers Comparison

2,713 bytes added, 19:03, 26 September 2016
Created page with "{| cellspacing="1" cellpadding="1" border="1" style="width: 100%" |- | '''Sewers'''<br/> | '''Appropriate Use'''<br/> | '''Relative Cost'''<br/> | '''Operations and Maintena..."
{| cellspacing="1" cellpadding="1" border="1" style="width: 100%"
|-
| '''Sewers'''<br/>
|
'''Appropriate Use'''<br/>

| '''Relative Cost'''<br/>
| '''Operations and Maintenance'''<br/>
| '''Effectiveness'''<br/>
|-
| style="text-align: center; vertical-align: middle" |
[[File:Sewerpic.png|thumb|right|100px|link=Design Features]]<br/>

[[Design_Features|Sewers for Buildings]]

| To transport wastewater from buildings to the treatment system<br/>
| Generally low but can increase based on length of pipes, soils, and topography.&nbsp; Cost can be minimized by placing treatment as close to buildings as possible<br/>
|
Low for gravity sewers<br/>

Moderate for pressurized systems

| High - Effective when designed and installed properly<br/>
|-
| style="text-align: center; vertical-align: middle" |
[[File:Primtreatpic.png|thumb|right|100px|link=Settled Sewers]]<br/>

[[Settled_Sewers|Settled Sewers]]

| Small to moderately-sized communities.&nbsp; Uses smaller pipes and can accommodate variable flows<br/>
|
Moderate for the sewer pipes<br/>

High when considering the cost of septic or settling tanks at each building.

|
Low for the sewers<br/>

High for the septic tanks when considering the required desludging.

| High when community programs for desludging are provided<br/>
|-
| style="text-align: center; vertical-align: middle" |
[[File:Consewer.png|thumb|right|100px|link=Technology]]<br/>

[[Technology|Condominial Sewer]]

| Small to medium-sized communities<br/>
| Low - Allows sharing of sewer laterals, which reduces cost<br/>
| Low when communities are responsible for maintaining their own laterals, as they are more careful to operate properly<br/>
| High when strong community participation and bottom-up planning is provided<br/>
|-
| style="text-align: center; vertical-align: middle" |
[[File:Combined wet.jpg|thumb|right|100px|link=Combined Sewers]]<br/>

[[Combined_Sewers|Combined Sewers]]

| Larger communities<br/>
| Moderate – groundwater, poor soils and variable slopes increase costs<br/>
| Low - Periodic declogging is generally required<br/>
| Moderate – Generally effective at moving waste away from population centers<br/>
|-
| style="text-align: center; vertical-align: middle" |
[[File:Pressure.png|thumb|right|100px|link=Technology]]<br/>

[[Technology|Pressure Sewer Pumps]]

| When variable slopes or distances will not allow gravity systems<br/>
| High - Pump tanks, pump equipment, and the cost of electricity adds to cost<br/>
| Moderate - Pump systems are generally reliable, but trash traps and screens often require continuous maintenance<br/>
| High - When installed and operated properly<br/>
|}

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