Cement, Energy and Environment

I efficiency of the systems. The meteorological and geographical details of the study area are depicted in Table 3 Table 3 Meteorological and geographical details of the study area - Ahiwara SNr. Parameters Values 0. 2 3 Temperature (Annual range) Rain fall Ground water table METHODOLOGY: Min - 8°C Max- 44°C Avg - 33°C Min -1 013 mm Max - 1689 mm Avg -1338 mm Min - 3m Max -32m Avg -22 m The rain water harvesting unit fabricated for the studies has been installed at the factory premises and mines area. Side by side conventional rainwater harvesting was also followed at the mines site only and efficiency of the two systems has been compared. To study the ground water table before and after rain water recharging a total of 11 tube wells were identified at both upstream and downstream locations of the factory. Out of these tube wells 3 (TW 9, TW 10, TW 11) were identified for conventional recharging and remaining were by new technique of Furaat Earth Pvt. Ltd . at mines and plant area. The ground water depth was regularly monitored using piezometer and detailed physicochemical parameter namely pH, Alkalinity, Chloride, fluoride, total dissolve solids and hardness were analyzed as per the standard methods (22nd Edition, 2012). FURAAT RAINWATER HARVESTING SYSTEM The rain water is collected from the roof top of various buildings and the area near the rain water harvesting unit. The detail of the total catchment area is detailed in Table No 4. The rain water harvesting unit consists of two modular two layer precast step well and tube well for underground recharge to the aquifer. The rainwater which is collected form roof surface comes to first step well through pipes. The first step well is based on horizontal filtration and sedimentation principle. The first Half of chamber is fi lled with gravels where suspended solids are trapped between the spaces in between the gravels the filtered water then enters the other half module which act as a sedimentation chamber, where the heavy suspended solids settle at the bottom of the chamber. Filtered and supernatant water enters into the second step well. The first chamber of the second modular step well consists of sand and charcoal, which act as a dual media filter. The filtered water comes to second chamber of the second step well which consist of non clogging stainless steel screen trough which the water is directly added to the aquifer with the help of tube well. The details of the unit are shown in the Fig 1. Table No 4: Details of the rainwater harvesting location and catchment area RAIN WATER HARVESTING CEMENT PLANT STORE BUILDING AREA Total Area m 2 TO (9.3 m x 9.3 m) 86.49 Oil Shed (10.3 mx 18.2 m) 187.46 Store (19.5 m x 12.3 m) 239.85 Ale Building (27 m x 16 m) 432 Total Roof Area m 2 945.8 Total Garden area m 2 1350 Spillage from Garden @50 % 675 Total RW collection Area m 2 1620.8 TOTAL RAIN WATER HARVESTED in KL as on 31 2167.0 .· March 2013 (1337 mm) . Hazibaba Colony Total Area m 2 Roof area - Shed No. 1 687.5 (55 X 12.5 m) Shed No. 2 (55 X 11 .8 m) 649 2 Ground (102.4 x 65.5) 6706.2 TOTAL AREA m 2 8042.7 TOTAL RAIN WATER HARVESTED in KL as on 31 10753.1 March 2013 (1337 mm) GDCL colony area Total Area m 2 Roof area (32 m X 6.6 m) X 4 844.8 nos. Hospital (15m x 9.5 m) 142.5 Garden (40 m x 50 m) @50 % 1000 3 area of 2000 m 2 Total Area of Rain water 1987.3 harvesting TOTAL RAIN WATER HARVESTED in KL as on 31 2657.02 March 2013 (1 337 mm) TOTAL RAIN WATER HARVESTED 1557712 1 IN PLANT AREA · Table Contd.. 3