NOVELTY - The method and system comprises: constructing a multi level wastewater treatment pond for holding wastewater introduced at one end and released at another end of the pond; growing a hydrophytic weed plant in the pond to treat waste effluent discharge; transferring the effluent from the first pond to a second pond through a pipe after 24 hours; interconnecting the ponds with pipe to transfer the treated effluent; and harvesting the plants from the first pond to be send for biogas production or to paper and pulp industry. The system uses multichannel artificial ponds for effluent treatment.    USE - The method and system is useful for treating waste water effluent such as industry effluent from tanneries, sugar refineries, paper mills (all claimed), and textile and plastic industries.    ADVANTAGE - The method and system is capable of simply and economically treating the waste water effluent without using any harmful chemicals.    DETAILED DESCRIPTION - The method and system comprises: constructing a multi level wastewater treatment pond for holding wastewater introduced at one end and released at another end of the pond; growing a hydrophytic weed plant in the pond to treat waste effluent discharge; transferring the effluent from the first pond to a second pond through a pipe after 24 hours; interconnecting the ponds with pipe to transfer the treated effluent; and harvesting the plants from the first pond to be send for biogas production or to paper and pulp industry. The system uses multichannel artificial ponds for effluent treatment. The first pond is an effluent storage pond that is 8 m long, 5 m wide and 3 m deep for storage of effluent discharge from factory and storing 120000 l of effluent. The second pond is a twin pond interconnected between the first and second ponds. The ponds are connected with each other by a pipe (0.25 m diameter) with a direction flow attached at 0.25 m above the depth of the first pond. The second pond of the twin pond is connected with an outlet pipe (0.5 m diameter) to discharge treated water to fresh water bodies. The 200 healthy plants are maintained in pond fresh water pond for raising new plants, and 1000 healthy plants are maintained in each tank of twin-tank.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of a twin pond system of effluent treatment by Eichhornia sp.