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New page: right An underground tank, which stores sewage, consists of blackwater (toilet waste) and greywater (kitchen, shower, sink, and laundry waste) until the tim...
[[Image:conservancy_tank.jpg|right]]
An underground tank, which stores sewage, consists of blackwater (toilet waste) and greywater (kitchen, shower, sink, and laundry waste) until the time of emptying. It must be watertight to prevent the leakage of foul water or the ingress of groundwater. They may be constructed in a variety of materials including brick or concrete, but modern ones are more commonly made from glass-reinforced plastics, polythene or steel and have a minimum capacity of 18, 000 litres.
Conservancy tanks must be emptied frequently. Leakage is more common in very old ones built of brick and concrete. The structure may have deteriorated allowing ingress of groundwater and leakage of foul effluent that will cause pollution and odor. The connection between the inlet pipe and the tank may develop a leak.
{| border="1" cellpadding="5" cellspacing="0" align="center"
|-
! width="50%" style="background:#efefef;" | Advantages
! style="background:#ffdead;" | Disadvantages
|-
| valign="top" | Advantages<br>
1. Flexible and adaptable to a wide variety of individual household waste disposal requirements.<br>
2. Essentially no maintenance needs except the periodic emptying.<br>
| valign="top" | Disadvantages<br>
1. Continuous emptying required<br>
2. Expensive to maintain<br>
3. Risk of leakage and groundwater pollution<br>
|}
== Operation and maintenance ==
Regular emptying of conservancy tank contents should be done when the wastewater
occupy 2/3 of the tank’s capacity. Emptying frequency depending on tank’s capacity
and amount of people. Normally done once every 1-2 months.
== Applying conditions ==
Satisfactory and acceptable facility for excreta disposal and other liquid wastes from individual houses, cluster of houses, apartments, and institutions (schools).
== Costs ==
<b>Cost of introduction:</b> Text
<b>Cost of maintainance:</b> Text
== External links ==
* [http://ww.website.org Title website]
* [http://ww.anotherwebsite.nl Title website2]
An underground tank, which stores sewage, consists of blackwater (toilet waste) and greywater (kitchen, shower, sink, and laundry waste) until the time of emptying. It must be watertight to prevent the leakage of foul water or the ingress of groundwater. They may be constructed in a variety of materials including brick or concrete, but modern ones are more commonly made from glass-reinforced plastics, polythene or steel and have a minimum capacity of 18, 000 litres.
Conservancy tanks must be emptied frequently. Leakage is more common in very old ones built of brick and concrete. The structure may have deteriorated allowing ingress of groundwater and leakage of foul effluent that will cause pollution and odor. The connection between the inlet pipe and the tank may develop a leak.
{| border="1" cellpadding="5" cellspacing="0" align="center"
|-
! width="50%" style="background:#efefef;" | Advantages
! style="background:#ffdead;" | Disadvantages
|-
| valign="top" | Advantages<br>
1. Flexible and adaptable to a wide variety of individual household waste disposal requirements.<br>
2. Essentially no maintenance needs except the periodic emptying.<br>
| valign="top" | Disadvantages<br>
1. Continuous emptying required<br>
2. Expensive to maintain<br>
3. Risk of leakage and groundwater pollution<br>
|}
== Operation and maintenance ==
Regular emptying of conservancy tank contents should be done when the wastewater
occupy 2/3 of the tank’s capacity. Emptying frequency depending on tank’s capacity
and amount of people. Normally done once every 1-2 months.
== Applying conditions ==
Satisfactory and acceptable facility for excreta disposal and other liquid wastes from individual houses, cluster of houses, apartments, and institutions (schools).
== Costs ==
<b>Cost of introduction:</b> Text
<b>Cost of maintainance:</b> Text
== External links ==
* [http://ww.website.org Title website]
* [http://ww.anotherwebsite.nl Title website2]
