Sodium Hypochlorite ( Hypo) solution is one of the most widely used disinfectant. This is used with wider range of concentration varying from 1% in water for disinfection applications to very least concentration of 2 to 8ppm for drinking water sterilization. This chemical is produced in two methods. One is passing chlorine gas in sodium hydroxide which is practiced mostly in chloro-alkali industries where sodium hydroxide is the prime product and chlorine gas is the by product. They adopt this process and concentrate the solution and get even the crystalline powder of HYPO. For disinfection purpose, this salt is again diluted to 0.5 to 1.0 percent solution. The second method of simply eletrolysing the common salt (sodium chloride) dissolved in lower concentrations like 4 to 5 percentage solution in a electrolyser by passing DC current in controlled conditions. In this process people use AC to DC rectifiers and draw the grid current. So the grid current is the major requirement apart from common salt.
In the present system, instead of grid current, the innovative method of using solar current is adopted by using appropriate size of solar panels. In this process the remaining parameters are same as in the case of AC to DC electrolysis. This is not only the mere replacement of AC to DC rectifiers but the real beauty is using the naturally available solar power which saves the burning of coal or burning of oil or any other fossil fuel. For generating every liter of 1% HYPO solution, about 60 watts of DC current is drawn from the sunlight which is equalent to burning of 50 grams of coal which intern emits 1500 liters of CO2 gas to the atmosphere. So in the scale of 25 liters of per day system the CO2 emission would be about 37500 liters and this emission is saved here. For the larger unit of 210 liters per day system the saving of CO2 emission is 37500x8= 300000 liters of CO2 per day. This is really the great contribution of green to the future generations. More over the system operates at maximum 12 volt DC, so the chances of getting electric shock are nil.
Applications:
- a) For strong black liquid wastes 5 times to 10 times dilution.
- b) Normal drains, toilet basins and toilet floors - 15 to 20 times dilution.
- c) For living rooms and verandahs - 20 to 30 times dilution.
- d) For washing sick people cloth and clothes with germs and bacteria ,20 to 30 times dilution
- e) For cleaning the washed eating vessels 50 times dilution
- f) For cleaning by wiping the sofas and tables 50 to 60 times dilution
- g) For disinfecting the drinking water just addition of 2 drops for every 6 liters. For fhis purpose the liquid could be filtered using small cartridges and then filled in 200 ml plastic bottle. This could be supplied to the families.
- h) For washing dirty platforms, this could be added with the soap solutions.
Mode of operations:
Example – Apartment campuses:
One 25 lit system can cater 80 to 100 families. For cleaning the environment by spraying the surrounding including the drains and for distributing ½ liter of 2000 ppm solution to every family and the other supporting staffs.
Example – Apartment campuses:
One 25 liter system can cater 200 families. One or two units per village could meet the entire village requirement.
Example: For larger Hospitals and Institutions
One 100 lit or 200 lit system will meet the requirements. In cities for every 1000 families one 100 liters production
unit and more families one or two 200 liters units will cater the needs. Following are the investment required for100
liters and 200 liters plant respectively:
1. 100 liters/day - Rs. 2,20,000/-
2. 200 liters/day - Rs. 4,00,000/-
