PLUMBING DESIGN 4
SEWAGE DISPOSAL SYSTEM
THE SEWAGE AND ITS DISPOSAL
The collection and safe disposal of human wastes are
among the most critical problems of environmental
health. Recent statistical reports revealed that most of
the water borne diseases such as dysentery, typhoid,
diarrhea and other intestinal disorders are prevalent in
areas where there is NO proper and scientific Sewage
Disposal System. The daily average volume of human
waste or excreta per capita is about 80 grams of feces
and 950 grams of urine. It is therefore important not
only to know the different types of sewage disposal
systems, but also to understand the scientific value of
the system.
TYPE OF SEWAGE DISPOSAL SYSTEM
1. CESSPOOL
2. PRIVY
3. SEPTIC TANK
4. PUBLIC SEWER LINE
1. CESSPOOL
- is a hole in the ground curbed with stones, bricks,
concrete hollow blocks, or other materials laid in
such a manner as to allow raw contaminated sewage
to leach into the soil. The organic wastes accumulate
and finally disposed of by disintegration process .
2. PRIVY
-is a concrete sealed vault with a wooden shelter
constructed for the collection of raw sewage. The
disintegration of excrement is accomplished in the
same manner as in a cesspool. It is objectionable
because of the danger of contaminating the source of
water supply.
3. SEPTIC TANK
- is a device or receptacle used to expedite the
decomposition of the elements contained in a raw
sewage waste. Raw sewage consists of water, and
settleable solid called organic materials that can be
precipitated in a septic tank in a very short time.
4. PUBLIC SEWER LINE
- is a public sewage system, operated and
maintained by the government consisting
of a sewage treatment plant that conveys
the raw sewage from buildings and houses
to a disposal system. Of these four types
of sewage disposal, the cesspool and the
privy are already obsolete. The prevailing
types recommended by the sanitary
authorities are the Public Sewer line and
the Septic Tank.
