Chemical free Grey Water Treatment

Global warming has resulted in scanty rainfall.Insufficient rains have resulted in water scarcity. As Necessity is the Mother of Inventions we have to find ways and means to solve this persisting problem.
A large volume of water is wasted from our kitchens and Bathrooms. The Domestic waste water is called Grey Water. It should be recycled and reused to meet the shortfall.
The Recycling of Grey water should be of individual’s responsibility. The Grey water recycling plant should be kept in every home, be it buildings or individual residences or offices. It should be ecofriendly where no chemical should be used for recycling. Recycling of grey water should not involve the use of chemicals because it will risk the lives of all those who are using it.
Biological water treatment involves the use of naturally occurring micro-organisms such as Algae, fungi, bacteria and plankton in the surface water to improve water quality. Under optimum conditions, including relatively low turbidity and high oxygen content, the organisms break down material in the water and thus improve water quality.
The first step of the process is an anaerobic settling tank. This closed anaerobic tank serves as a pre-treatment to allow solids to fall out of suspension and precipitate to the bottom of the reactor to reduce the turbidity of the water. A variety of anaerobic bacteria are present in this tank; they generate acids and ferment methane.
Next, the sewage flows through a biofilter of bark and materials of humus. This gives the sewage its first filtration and reduces the odors prevalent in anaerobic conditions. The mixture then moves into a series of aerobic tanks. The first tank is a dark, closed-top aerobic reactor that serves as a transitional step. The next tank is an open-top, aerobic reactor that contains photosynthetic algae which supplies oxygen into the turbid water.
Bacteria immobilize the pollutants. Nitrosomonas and Nitrobacter nitrify Ammonia into Nitrates. Pseudomonas Bacteria convert Nitrates into gaseous Nitrogen. Water Hyacinth which has filamentous aquatic roots provide stable habitat for Bacteria.
Plankton is a primary producer. They eat up excess bacteria in the tank and they are food for fishes and Mollusks. Now the Bio- diversity of the tank has increased. Snails and fishes will clean the tank. Anodonta fresh water clam will filter 40 to 50 liters of water per day by absorbing colloidal materials and other suspended solids. Out of the waste water. The breaking up of the colloids is the compost for agricultural fields.
The fresh water clam is facing endangerment as fishes are nearer to extinction. So let us not disturb the food web of Nature as it is going to benefit us.