Specifications for Conventional Water Treatment Plant
Ref : Schedule of Rates, MJP Pune region 2012-2013
Designing (aesthetically), providing, constructing and commissioning Conventional Water Treatment Plant consisting of all Civil, Mechanical and Electrical works including cost of providing and applying epoxy paint to inside surface of water retaining structures in contact with chlorine and providing anti-termite treatment to entire structure below groundlevel, mechanical and electrical components of various sub-works as given below,including necessary hydraulic testing,structural testing, equipment testing and trial run for a period of 3 months,etc. complete as directed by Engineer-in-charge (turn-key job).
1) Aeration Fountain - Plan area not lessthan 0.625 square metre per MLD
2) Ventury Flume - With necessary devices, consisting of simple mechanical indicator (Pedestal type gauge)
3) Flash Mixer - Rapid mixing device, detention time 60 seconds to give velocity gradient 300 to 400 sec-1, vane mixer type conforming to I.S. 7090 of1985.
4) Flocculator - Conforming to I.S.7208- 1974 (Type-C) with detention period of 30 minutes.
5) Clarifier - Horizontal flow circular tank, detention period 2-5 hours, overflow rate 30 cubic metre per square metre per day (to be specified), Weir loading not more than 300 cubic metre per metre per day, with mechanical sludge scraper conforming to I.S. No. 10313-1982.
6) Rapid Sand Filters and Filter House -Filter designed for filteration rate of 5,000 litres per square metre per hour,minimum 2 beds for plant upto 10 MLD,for larger plants as specified, filters to be located in filter house with roof
slab,pipe gallery and platform minimum 5.5 metre in width.
a) Filter Sand - Effective size 0.45 to 0.70 mm, uniformity coefficient not more than 1.7, nor less than 1.3, depth of water
over sand 0.75 M, free board 50 cm, gravel 0.45 M in depth, sand and gravel conforming to I.S. 8491(i)-77, backwash
by air wash, standard appurtenances (to be specified), rate of flow controller, filter gauge, sand expansion gauge, etc.
b) Wash Water Tank - Capacity to be specified and suitable to supply water to wash 2 filter units at a time where the
units are 4 or more.
c) Wash Water Pumps - Capacity to fill water tank in 1 hour with 100% standby.
d) Air Blowers - Capable of delivering 600 LMP per square metre of free air, of filter area at underdrains (100% standby).
7) Chemical House in Two Storeys
a) Ground floor to accommodate 7 days'alum requirement and sundry storage.
b) First floor to accommodate alum and lime tanks. etc.
c) Solution tanks - Minimum 3 tanks (one for preparation, second for dosing and third as standby), each tank capable of
giving 8 hours maximum dose without interruption, minimum free board 0.30 M, trays for dissolving, level indicator,
mechanical agitation devices, solution feed and drain lines, solution feed device (constant head device, strength
of solution upto 10% only) conforming to I.S. 9222 Part-I 1979.
8) Pure Water Sump and Sump House.
a) Capacity of sump - One hour of designed flow.
b) Pump House - Pump house of required size over the sump or by the side.
9) Store House - Suitable for alum storage of three months' requirement in monsoon with 10% extra capacity for other sundry articles.
10) Vacuum feed type Chlorinators - Make to be approved by MJP.
11) By pass arrangements - C.I.or M.S. pipes.
12) Drainage arrangements - RCC pipes upto plot boundary.
13) Electrical installation - Both internal and external including entire plant area.
14) Laboratory equipment - As per requirement (to be specified during tendering).
15) Sanitary blocks - Carpet area - 15 square metre minimum upto 25 Mld and 25 square metre above 25 Mld.
16) Administrative block and internal road -To accommodate office room, chlorine room, laboratory room, panel board room, blower room etc. and WBM road to connect all units from main gate of plot.
