slides about project of grey water treatment by root zone technology

1. Mid-West University
Graduate School of Engineering
Central Department of Hydropower Engineering
Birendranagar, Surkhet
PROJECT PROPOSAL ON
AN EXPERIMENTAL PROJECT ON GREY WATER
TREATMENT BY ROOT ZONE TECHNOLOGY
By:
Aashish Kumar Pulami
Pranish Karn
Santosh K.C
Surendra Bahadur Khatri

2. CONTENTS
1. Introduction
2. Methodology
3. Work Schedule
4. Budget Estimation
5. Expected Outcome

3. 1. Introduction
1.1 Background
• Water is expected to become absolute in many countries by the year 2025.
• Term 'Root Zone' consists of the life interactions of various bacteria, the roots
of plants, soil, sun, and water.
• Root zone technology is effective technology called Decentralized Grey water
system (DEWATS)
• RZTS makes use of biological and physical-treatment processes to remove
pollutants.
• Useful for small scale work while we can plan it for huge network also.
• RZTS is an engineered method of purifying waste as it passes through the
artificially wetland area.
• Pollutants are removed by various physical, chemical and biogeochemical
processes like sedimentation, absorption, and nitrification.

4. 1.2 Objectives
•To investigate feasibility of RZTS
for waste treatment of grey water
coming from drinking water tap of
Graduate school of Engineering, MU.
To analyze and characterize the waste
water.
To compare the treatment efficiency
of root zone system with
conventional treatment plant.

5. 1.3 Significance
Significance
Capital is
low Potential to
develop
beautiful
landscape
Potential
for bird
sanctuary
Consistent
quality of
treated
water
Simple
Construction
Utilized for
wide range
of contents
Lasts of
more than
50-60 years
No sludge
Production
Requires no
skilled
operator

6. 1.4 Limitations
Portion of either soap
or detergent and food
waste will be added to
the collected sample
to check its
purification strength.
Only collected sample
has to be analyzed
rather than treating a
continuous flowing
waste water.
Limitations

7. 2.Methodology
2.1 Conceptual Framework
Treated water gets accumulated in the outlet channel is taken out and sent to the
laboratory for the parameter test tangible to the objectives.
Filtering action of the soil bed, the action with fungi etc. helps in finally obtaining a
very clear and clean water.
Nearly 2500 types of bacteria get oxygen from the weak membranes and
aerobically oxidize the organic matter from the effluent.
Effluent percolates through the bed which has all the roots of the wetland plants
spread very thickly.
Raw effluent is passed horizontally or vertically through the bed of soil having an
impervious bottom.

8. 2.2 Model Unit

9. 2.3 Procedure
The unit is constructed by
placing separate layers of
soil, sand and aggregates
after arranging the layers the
plants is planted in the unit.
Further the growth of
plant is monitored
During the growth period of
1-month plain water will be
sprinkled.
Then grey water will be let
into the root zone system and
the samples will be collected.
Water samples will be spread
evenly on the top layer of
wetland system and samples
will be taken once from outlet
chamber of the wetland unit.
The samples will be collected
by putting a clean plastic
bottle below the outlet pipe of
constructed wetland and
analyzed.

10. 2.4 Removal Mechanism
SN Substances Processes Involved
1. Organic matter Aerobic/Anaerobic microbial
degradation
2. Suspended soil Sedimentation, Filtration
3. Pathogens Sedimentation, Filtration
4. Nitrogen Nitrification, denitrification by plant
5. Metals Microbial oxidation/reduction

11. 3. Work Schedule
Ashar Shrawan Bhadra Asoj-Poush Magh Falgun Chaitra
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Literature Review
Proposal Writing
Proposal Defense
Desk Study
Construction of Setup
Growing of Plant
Grey Water let in
Final Defense
Completed
Ongoing
Remaining
No
Progress
in
Work

12. 4. Budget Estimation
SN Items Rate Quantity Total Cost
1. Thermocol Box Rs 2400 1 nos Rs 2400
2. Plastic Jar Rs. 450 2 nos Rs. 900
3. PVC pipe- 75mm Rs. 300 6 m Rs. 1800
4. PVC getwall Rs. 550 2 nos Rs. 1100
5 Elbow- 75mm Rs. 350 4 nos Rs. 1400
6. PVC Solvobond 200 ml Rs. 450
7. Bondset Rs. 50 2 nos Rs. 100
8. Tank Nipple Rs. 450 2 nos Rs. 900
9. Plastic Net Rs. 100 2.5 ft. Rs. 250
10. Plant (Canna indica) Rs. 60 16 nos Rs. 960
14. Coal Rs. 200 10 kg Rs. 2000
12. Coarse aggregate
13. Garden Soil
14. Fine aggregate
15. Miscellaneous Rs. 2500
Total Rs. 14760(approx.)
Budget Estimation

13. 5. Expected Outcome
High level of
bacterial and viral
removal from the
effluent.
Decreased
biological oxygen
demand (BOD)
and reduction of
total suspended
solids(TSS)
Reduction of
nitrogen
concentrations
and removal of
metals.
After the completion of the project we are expecting-

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