All the waste water of the hospital premises, before throwing into the river, are being treated in a natural manner by cultivating algae (special kind of water hyacinth) which help in purifying the waste water at this stage and also a nutritious food for fish and poultry. This project is jointly being conducted by Kumudini and its partners.

The Kumudini Complex at Mirzapur has a regular population of 4000 residing in Kumudini Hospital , Bharateswari Homes, Nursing School , Medical College students and the staff residents. Waste water generated from the complex are piped down and treated through the duckweed based treatment system. Waste water is composed of primarily domestic, hospital effluent and sewer. Total capacity of the waste water system is four hundred liters/day at present.

Under most Bangladeshi circumstances the final effluent from duckweed based waste water treatment systems are superior to the receiving stream or water body. Duckweed system runoff may, therefore, be used as input to virtually any water intensive operation irrigation, factory use and cooling systems among others. Duckweed converts the waste nutrient into high quality bio mass crop. A typical duckweed based waste water treatment plant will yield up to 800 kg of harvested duckweed (wet weight) per hectare of surface area per day. This daily harvest will produce 30 kg of fish poultry meal or 80 kg of dried high protein duckweed.

Green Gold Project

An agricultural project has been implemented in the fallow land near Kumudini Hospital and Bharateswari Homes. Vegetables are cultivated here and a number of fishponds have been dug. All these activities are following modern practices. A major part of the demand for fish from Kumudini complex is met by the fish supplied from this project. It also supplies substantial quanty of vegetables to the complex.

R. P. Shaha was always keen to undertake innovative programs so that Kumudini becomes a field of work for self-reliant workers. This has been his prime concern when he was alive and Kumudini workers, imbued by R. P. Shaha's ideal, are continuing to devote themselves to this task.

Starting from the vegetable gardens, the entire project is a large field where valuable experience and practical knowledge can be acquired. A nutrition project based here is successfully imparting practical training. A pilot poultry farm project has been implemented here so that the supply of necessary fish, meat, vegetable and fruit are available from here. Also, experiments are being conducted for cultivation of three kinds of aquatic algae (special type of water hyacinth) which grow in abundance in this country. There has already been some success in this arena. These algae multiply fast in polluted water and during the process reduce the pollution level. It is rich in protein which makes it an ideal food for silver or grass carp. Silver or grass carp feeding on these algae grow very fast with 20-30 percent higher protein content compared to other fish.

These two projects are creating job opportunity for the locals.