The document proposes a portable greywater treatment system to reduce COD levels and enable reuse. It consists of (1) collecting greywater and removing particulates through mechanical filtering, (2) flowing the water through multiple layers of crates containing a water bed to further reduce COD levels, and (3) collecting the treated water in a tank for distribution via pumping to the roof tank and then for uses like flushing, irrigation, or gardening. The proposed system aims to overcome limitations of existing large, difficult to install systems by being more portable, easy to maintain, and naturally driven while achieving significant COD reduction to allow for water reuse.

1. Content
• Introduction
• Goals & Objectives
• Literature Survey
• Existing System & it’s limitations
• Proposed System
• Working
• Components Used
• System Architecture
• Advantages of proposed system
• Future Scope
• Conclusion
• References

2. Introduction
• Greywater or sullage is
wastewater generated from basins,
showers and baths.
• It differs from the discharge of toilets
which is
designated sewage or Blackwater to
indicate it contains human waste.
• Recycled on-site for use
in toilet flushing,
landscape irrigation
and constructed
wetlands.

3. Introduction
• For irrigation purpose, According to standards of Central
Pollution Control Board, permissible value of
BOD (Biochemical oxygen demand) is 30 mg/l
COD (Chemical oxygen demand) is 250 mg/l in India
• Currently, we are dealing we COD of upto 1000mg/l and reducing it
to approx. 200 mg/l
Fig.
Data from different areas
show amount of COD in
different activities

4. Goals & Objectives
• To reduce COD (Chemical oxygen demand) of the
grey water, so that is it reuseable for flushing
purpose
• Portability of system is increased, so that its
assembly and disassembly is simple, resulting in
easy trouble shooting.
• Easy maintenance

5. Literature Survey
Sr.
No.
Paper Name Year Author Description
1 Treatment and
potential reuse of
greywater from
schools : a pilot
study
2017 Abdalrahma
n D, Alsulaili,
Mohamad,
Hamoda.
Rawa Al-
Jarallah
Easy maintainence and low
cost system for on-site
treatment and reuse of water
collected from water sinks
and fountains, as major
sources of greywater(GW) at
schools.
2 Greywater reuse in
residential schoold
in madhay pradesh
– A case study of
cost – benefit
analysis
2009 Sam
Godfrey,
Pawan
Labhasetwar
, Satish
Wate
Cost- benefit analysis was
undertaken for greywater
reuse by considering internal
and external costs and
benefits.
3 Greywater reuse: A
stategy for water
demand
management in
harare.
2007 Emaculate
Madungwe,
Saniso
Grey water reuse in African
countries to sustain the
demand of agriculture
purpose.

6. Existing System & Limitations
• The system used for
grey water treatment
which results in foul
smell, which is further
is large in size yet
uneasy in installation
and not portable.
Limitations :
• Not portable
• Huge size
• Not easy to install
• Generates foul smell
• High maintainence

7. Proposed System
• More Natural Solution unquestionably
• The current system solves the issue of
PORTABILITY, which gives user only the job of
assembling the system.
• The system has easy maintenance.
• Easy Trouble-Shooting
• Less Foul smell

8. How will the system function?
• Collecting the grey water from the source
• Grey water then flows through mechanical filter for removal of any
particulate matter that would clog the system
• Then through pipe into the crates where water bed is formed (x 6) resulting
in reduction in COD
• Two layers of crates (3x + 3x) are attached through siphon so that
water flows from layer to another
• Water is collected into a tank from crates which is reduced in COD
and ready to be reused
• The collected water is pumped into the tank on the roof where
constant bubbling is done inside the tank and from there it is distributed
for flushing , irrigation or gardening purpose.

9. Components
1000l
48W
175l
2 inch
0.5HP

10. System architecture

11. • The system is transportable, movable, mobile
• COD is minimized heavily
• Rigid Structure
• Reduces Waste
Advantages of Proposed System
• Less Maintainence required
• System is more naturally driven
• Reduces Cost giving more
storage of water
• Flexibility in upgrade

12. Future Scope
• More portable designs to satisfy storage need
• Increase flexibility of the system
• Improve portability
• Trouble shoot existing problems

13. Conclusion
• Our proposal of grey water system considering the current
problems has been succesful to an extent.
• There is always room for improvement with
1. Portability issues
2. Space constraint
3. Level difference
4. Flexibility in Cost

14. References
• http://vadic.vigyanashram.blog/2019/12/20/compact-grey-
water-system-for-a-household/
• http://vadic.vigyanashram.blog/2020/02/23/grey-water-
recycling-system300-500-liter/
• https://iwaponline.com/wst/article/72/11/1973/19284/Quan
tification-and-characterization-of-greywater
• https://thewaterproject.org/water-crisis/water-in-crisis-
india
• https://www.researchgate.net/publication/235442595_Cha
racteristics_and_treatment_of_greywater-A_review

15. THANK YOU