This document discusses greywater, which is wastewater from sources like showers, sinks, and washing machines that can be reused for irrigation. It defines greywater and notes that it makes up 50-70% of household wastewater. Various sources of greywater are described. There is a need for greywater management to safely reuse it and guidelines for doing so. Primary and secondary greywater treatment systems are outlined that can further treat greywater before reuse through irrigation systems like drip irrigation. The components of a greywater system and its uses and benefits are summarized.

1. AFFILIATED TO
GUJARAT TECHNOLOGICAL
UNIVERSITY
Tolani F. G. Polytechnic
BUILDING SURVICES
(3360604)
SEMESTER VI
DEPARTMENT OF CIVIL
ENGINEERING
APREL 2017

2. Prepared and Presented by
Amit Mali - 146510306033
In-charge Faculty
Mr. RAVI R. GURNANI
BUILDING SURVICES
(3360604)

3. CONTENTS
introduction
Definition
Quantity of grey water
Composition of grey water
Grey water from bath room
Grey water from washing
Grey water from Kitchen
Need of grey water Management
Grey water treatment system
Components of grey water
Uses of grey water
Guideline for reuse of grey water

4. Now with the growing population it is very necessary to
reuse the raw water mostly for Indian country where more
than 70% people depends upon the agriculture where there
is not a fix time for rain and former is mostly depends
Upon tubell, well and canal in that way grey water is also a
medium for irrigation.
Introduction

5. definition grey water
Grey water is all wastewater that is discharged from a house, excluding black water
(toilet water).This includes water from showers, bathtubs, sinks, kitchen,
dishwashers, laundry tubs, and washing machines It commonly contains soap,
shampoo, toothpaste, food scraps, cooking oils, detergents and hair. Grey water
makes up the largest proportion of the total wastewater flow from households in
terms of volume. Typically, 50-70% of the household wastewater is grey water.
•It has low concentrations of organic matter.
•It is also called as sullage.
•It contains of small amount of bacteria.

6. 1st Qtr
2nd Qtr
3rd Qtr
4th Qtr
Percentage of grey& black water

7. Sources of grey water
shower tapbath

9. TYPE OF GREY WATER
There is mainly two type of greywater
 Low loaded greywater (raw water coming out from
shower, bathtubs & handbesins.)
 High loaded greywater (raw water coming out from
kitchen, dishwasher, washing machine.)

10. Quantity of grey water
The amount of waste water generated by house hold will very greatly according to
the dynamics of the household, and is influenced by the following factors:
•The number of occupants
•The age distribution of the occupants
•The life style characteristics of the occupants
•The cost of water
•Water use patterns
•The climate

11. Quantity of grey water
• while the water consumption in poor areas is about 20-30 liters/person/day, a
person in a richer area may be generated several hundreds of liters a day. As per
IS:1172-1993, minimum domestic water requirement for India is 135
liters/head/day . when planning for water supply and sanitation it is essential to
control water consumption. People should be provided with fresh water for basic
needs while unnecessary consumption should be prevented. An efficient use of
water is crucial wherever the water resources is scarce, to reduce the generation
of waste water.

12. Composition of grey water

13. Need of grey water Management
 To remove substance that may be harmful to human health.
 To remove substance that may be harmful to plants and soil.
 To remove substance that may be harmful to the environment.
 To remove substance that may clog the irrigation system.
 To prevent contamination of ground water and drinking water reservoirs.
 To avoid damage to building and surrounding areas from inundation, water logging
and freezing.
 To avoid the certain of bad odors, stagnant water and breeding sites for
mosquitoes.
 To prevent eutrophication of sensitive surface waters.

14. Grey water treatment system
Grey water treatment system
Primary diversion
system
Secondary treatment
system
gravity diversion
system
Pump diversion
system
Active sludge
treatment
Constructed
wetlend

15. Grey water treatment system
The choice of system depends on the following factors:
 The owners willingness to operate and maintain the facility.
 The sources of grey water to be recycled.
 The purpose of grey water reuse.

16. Grey water treatment system
1. Primary diversion system
Primary diversion methods are use coarse screen filters or sedimentation
to remove oils , grease and solids prior to discharge to the land
application areas. These system are likely to be considerate the most
economically attractive for grey water use because maintenance can
usually be carried out by the home owner, and they generally do not rely
heavily on electricity or chemicals to operate.
These include two methods
1. gravity diversion system
2. pump diversion system .

17. 1. Gravity diversion system
A gravity diversion device incorporates a tank-activated value, switch
or tap which is fitted to the outlet of the waste pipe of the plumbing
fixtures, such as the laundry tub. The plumbing diversion device can
be switched by the householder to derive grey water from the laundry
tub by gravity directly to the diversion line and the proposed land
application area. The gravity must not be stored.

21. 2. Pump diversion system

22. 2. Pump diversion system

23. 2. Secondary treatment system
Secondary treatment system further treat the grey water to remove more
of the oils/grease, solids and organic materials. This allows secondary treated
grey water to be irrigated via micro-drop or surface irrigation methods. These
system are generally more expensive due to the initial establishment costs
associated with the continuing treatment needs and ongoing maintenance
cost. however, the treatment level enables a much more conventional surface
irrigation system and presents less of s health risk in the case of human
contact. There are many types of secondary system including:
1. Slow sand filter
2. Activated sludge
3. Constructed wet lend
4. Trickling filter

24. Slow sand filter

25. Activated sludge

26. Trickling filter

27. Components of grey water
1. Plumbing system
2. Surge tank
3. Screens and filter
4. Pump
5. Irrigation system

28. 1. Plumbing system
A pipe system is always needed to collect and lead water to
where it is treated or uses. Designing and plumbing a collection
system is similar for grey waste water. As there is no need for
transporting toilet waste, thinner pipes can be used for grey water
compared to mixed wastewater. All pipe systems must be
equipped with ventilation for air and smell evacuation. Normally a
self ventilating pipe arranged as a chimney above the roof is
enough for this. Bad odours will sooner or later arise in the
collecting system. Therefore all pipe connections in the house
must be equipped with water traps.
clogging from fats is a potential risk in grey water systems
that must always the considered, especially when the pipe system
is enlarged and water cools in of ground. Pipes must be put
straight (no necks or depressions) with gradient atleast 0.5% (i e.
5 mm/m). The pipe system must always be equipped with flushing
pipes/wells if clogging could occur.

31. 1. Surge tank
In the grey water system, is surge tank used to collect
and temporarily store water, but it is not a storage
tank. Water from the surge tank is delivered to the
application area by gravity flow or by pumping. The tank
must be solid, durable, watertight when filled, and
protected from corrosion. The tank must be vented and have
a locking gasketed lid. It must be anchored on
dry, level, compacted soil or on a 100 mm thick PCC
slab. The capacity of the tank and "GRAY WATER IRRIGATION
SYSTEM DANGER UNSAFE WATER. must be

32. Surge tank

33. Surge tank

34. 3. Screens and filter

35. 3. Screens and filter

36. 4.pump

37. 4.Irrigation system
The grey water standards allow two types
of irrigation system:
1.Subsurface drip irrigation
2.mini-leach irrigation
1. Subsurface drip irrigation system

39. Mini-leach irrigation

41. Uses of grey water
 Watering Gardens
 Fire hydrants
 Field Irrigation
 Toilet flushing
 Cooling tower make-up

42. Advantages of grey water
1) Save water (30-35% reduction in consumption) and money
2) Reduce the demand on your reservoir/toilet distribution pumps
3) Increase the lifespan of your septic system
4) Less strain on public sewage treatment system
5) Reduction in energy use by the municipality
6) Increase points to reach LEED certification goals
7) Groundwater recharge
8) Reclamation of otherwise wasted nutrients

43. REFRENCES:
 https://mail-attachment.googleusercontent.com/attachment/u/0/?
 https://en.wikipedia.org/wiki/Drip_irrigation
 https://en.wikipedia.org/wiki/Drip_irrigation
 https://www.uwyo.edu/owp/_files/finalreportp11.pdf
 https://en.wikipedia.org/wiki/Screen_filter
 https://en.wikipedia.org/wiki/Surge_tank
 https://en.wikipedia.org/wiki/Trickling_filte r
 https://www.uvm.edu/~ewb/.../Grey%20Water%20in%20Developing%20Countries.pd...
 https://en.wikipedia.org/wiki/Secondary_treatment
 Building services (3360604)

44. Thank You