Development of an automatic cleaning mechanism for roof water harvesting
By: Lakshminarayana S V.
Contributor(s): Sathian K K (Guide).
Material type:
BookPublisher: Tavanur Department of Land and Water Resources and Conservation Engineering, Kelappaji College of Agricultural Engineering and Technology 2016Description: 76 pages.Subject(s): Department of Land and Water Resources and Conservation EngineeringDDC classification: 631.3 Online resources: Click here to access online Dissertation note: M.Tech Abstract: One of the easiest and efficient way of water conservation to solve drinking
water scarcity is rooftop water harvesting. However, the technology has some
limitations with regard to its purification system. The commonly used sand and
gravel filter is very prone to clogging and its cleaning is not an easy job. At the
same time, the alternative upward flow mesh filter needs further improvement in
cleaning efficiency and some hassle free drain cum back washing mechanism.
Hence, a study has been taken up on the upward flow filter system to improve its
filtration efficiency and incorporate an automated drain cum back washing
mechanism. The study also included the performance evaluation of a first flush
system when attached to the inlet side of the micro mesh filter.
To evaluate the performance of the filter and first flush, inflow and outflow
of the rooftop water samples were analysed for pH, EC, TDS, SAL and TSS
parameters. In general, the PH, electrical conductivity, and TDS of the roof water
samples were within the drinking water standards and the filter system was found
to reduce TDS values. In the case of TSS, mostly the impurities were organic in
nature and concentration varied between 220 to 280 mg/l, a level much higher than
WHO and BIS standards. The 3 micron mesh filter is removing 100% of the organic
TSS impurities. The filtration rate of this filter is about 0.37 lps at a hydraulic head
of 1.5 m and hence suites to rooftop rain water harvesting. First flush system
showed better cleaning efficiency when attached to the inlet side of the coarser
micro mesh filters. Automatic flush developed for the removal of stagnant water
with impurities were performing well by removing all the stagnant water and about
92 % of the impurities. It can be concluded that 3 micron mesh filter with automatic
flush can function as a near fool proof mechanism for filtering rooftop rain water.
| Item type | Current location | Collection | Call number | Status | Date due | Barcode |
|---|---|---|---|---|---|---|
Theses
|
KAU Central Library, Thrissur Theses | Reference Book | 631.3 LAK/DE (Browse shelf) | Not For Loan | 173826 |
M.Tech
One of the easiest and efficient way of water conservation to solve drinking
water scarcity is rooftop water harvesting. However, the technology has some
limitations with regard to its purification system. The commonly used sand and
gravel filter is very prone to clogging and its cleaning is not an easy job. At the
same time, the alternative upward flow mesh filter needs further improvement in
cleaning efficiency and some hassle free drain cum back washing mechanism.
Hence, a study has been taken up on the upward flow filter system to improve its
filtration efficiency and incorporate an automated drain cum back washing
mechanism. The study also included the performance evaluation of a first flush
system when attached to the inlet side of the micro mesh filter.
To evaluate the performance of the filter and first flush, inflow and outflow
of the rooftop water samples were analysed for pH, EC, TDS, SAL and TSS
parameters. In general, the PH, electrical conductivity, and TDS of the roof water
samples were within the drinking water standards and the filter system was found
to reduce TDS values. In the case of TSS, mostly the impurities were organic in
nature and concentration varied between 220 to 280 mg/l, a level much higher than
WHO and BIS standards. The 3 micron mesh filter is removing 100% of the organic
TSS impurities. The filtration rate of this filter is about 0.37 lps at a hydraulic head
of 1.5 m and hence suites to rooftop rain water harvesting. First flush system
showed better cleaning efficiency when attached to the inlet side of the coarser
micro mesh filters. Automatic flush developed for the removal of stagnant water
with impurities were performing well by removing all the stagnant water and about
92 % of the impurities. It can be concluded that 3 micron mesh filter with automatic
flush can function as a near fool proof mechanism for filtering rooftop rain water.
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