DESIGN OF SEWAGE SYSTEM
SEWERAGE SYSTEM
The underground conduit for the collection of sewage is called sewer. A network of sewers and appurtenances for the collection and conveyance of sewage generated from each of the properties to sewage pumping station for pumping to sewage treatment and disposal is called Sewage System. There are two types of sewerage system.
1. Separate sewerage system
2. Combined sewerage system.
Separate sewerage system
In separate system of sewerage there are two collection systems or pipe network;
- one for collecting domestic sewage as sanitary sewerage system and
- another for collecting storm water as storm water drainage system.
The sanitary sewerage systems for domestic sewage are designed for peak sewage flow expected at ultimate stage at the end design period. The storm water drainage systems are designed to carry the maximum storm runoff expected during the critical duration of rainfall.
Separate Sewage Treatment System
Advantages of separate sewerage system are:
- The capacity of the water treatment plant will be smaller since only domestic sewage alone is to be treated.
- Operational problems are less.
Disadvantage of separate sewerage system are:
- Storm water may always find its way into the domestic sewerage system either through wrong house sewer connections or through manholes and overload the sewage treatment plant.
Combined sewerage system
In Combined system of sewerage both sewage discharge and the storm runoff are collected and conveyed through a common collection system. The ratio of the maximum storm runoff to sewage flow works out to be 20 to 30. Hence during non-monsoon period only 1/20th or 1/30th of the design flow, i.e, only the sewage flow is passing through the combined system with very small velocity, resulting in clogging of the systems. Combined sewers are of special types such as egg shaped etc. Combined sewers are , therefore not recommended for Indian conditions since the rainfall occurs for a period of 3 months or less and there are poor water supplies. In India, only separate sewerage system are adopted.
Combined Sewage System
Advantage of Combined sewerage system are:
- Only one system is provided and therefore there will not be any confusion in giving connection, and
- Less expensive to install the system.
Disadvantage of Combined sewerage system are:
- During non-rainy days the flow will be very meager causing, salivation requiring frequent cleaning.
20 Responses to “DESIGN OF SEWAGE SYSTEM”
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Pls send to my mail this article.
thanx for water treatment information
i want to design a sewerage system for 2600 persons over 2.6hectare area.
Pls email me the article
pl send me a design calculations of all structures of STP
Pls send me software for calculation sewers system
Pl send me the article
want to design a sewerage system for hospital 80 rooms.
Please send me the desing mannual of an urban water treatment plant?
plz send me a design calculations of all structures of STP
can you give me any idea related to drainage system actually i want to make a project for my final year B.E.
i have a project on “design of sewage system” sothat we want more detail on my mail
i take a major project on “design of sewage system” in my college sothat we want more detail on my mail
Please, please send me some water and wastewater articles
thank u go on send me other relate this topic
We are looking for the similar design like the drawing below. The system shall have EQ Tank-Sludge Holding Tank-Aeration Tank-Clarifier Tank. Please propose design drawings and quote
Consideration for Effluent spec
1. Ammonium -0.5mg/l
2. Nitrite – 0.08mg/l
3. Nitrate – 45mg/l
Requirement
1. Tank material – SS316 preferred.
2. Accessories – TBA by supplier. But the instrumentation best to be Ex-proof type. If not, we can supply ourselve.
3. How long is the treatment cycle? It shall be taking < 18 hours.
4. All related drawing of your offering like Material List, Equipment List, GA, Single Line, O&M, Design philosophy etc shall be included.
5. Spare part. Pls advise us on commission spares, critical spares. We can talk about this later.
Your response by 13 August 2014 on the above request is appreciated
lease
Very good explanation about separate and combined sewarage system. Could you pls send me some more details?.
Thank you
Please send me design calculations for waste water disposal and treatment. Thank you in advance.
Am interested in how you explain the difference between the two systems. can you please send me a design which is ecologically sound (using gravity and no energy (electricity needed?
Share new an opinion about this subject me on my mail.