NRDC Technology offer-BOD BIOSENSOR

PRODUCTION FACILITY

A small bio chemical laboratory (for bacteria culture).

A small work shop for fabrication of sensor and various mechanical components

A small electronic workshop to fabricate the electronic part of the instruments

A microbial sensor has been developed for the measurement of biochemical oxygen demand (BOD) for water samples in most simple and easy way. It can measure BOD for any kind of water such as, pond water, river water, municipal water and industrial waste water such as breweries waste, paper mill effluent, pharmaceutical waste and waste from food process industry. The BOD sensor is convenient and measurement is rapid, therefore it envisages wide applications in water pollution estimation. The sensor is essentially a Clark type oxygen electrode over the membrane of which trichosporon beigilli microbe entrapped in a cellulose ester membrane and the system is protected by another cellulose ester membrane. The amount of oxygen dissolved in water is measured using the Amperometric method. The electrode system consists of a small disc of gold which acts as a negatively polarised electrode. The anode is a large cylindrical foil of silver. This electrode system is inside a cell the bottom wall consists of an oxygen permeable membrane of a copolymer of tetrafluoroethylene and hexafluoropropylene. The cell is sealed off the atmosphere at the top. When the oxygen electrode is dipped into a water sample and a potential is impressed between the two electrodes, dissolved oxygen that differs from the water sample into the cell of the oxygen electrode reaches the gold electrode and gets reduced there, whereupon a current is developed which gives a measure of the BOD of the sample.

The cost of production of the BOD sensor by the method process developed is very less as compared to the imported product. On the other hand the quality of the product is equally good as compared with imported one. Therefore the process offers a good return on investment to the manufacturer. Because of its competitive low cost of production, the product is also likely to have potential in export market. With the advent of rapid industrialisation and urbanisation, there is enormous amount of pollutant s generated and discharged to environment everyday. In order to estimate degree of pollution, it is necessary to have an easy way to measure such pollution. The measurement of biochemical oxygen demand (BOD) is such a way to estimate the extent of contaminants in water.

National Research Development Corporation, a Government of India Enterprise, is a premier technology transfer Corporation with four decades of experience. It has helped establish over one thousand projects in the small and medium scale sector. The supply of technologies and services to entrepreneurs extend both in the developing and developed countries like USA, Germany, Malaysia , Burma , Nepal, Senegal, Madagascar, Indonesia Philippines, Vietnam, Lanka, Kenya, Brazil, Bangladesh and Egypt.

Dimensions	8 Cm x 10 mm
Response time	15 minutes
Detection limits	4 mg/dl to 30 mg/dl
Accuracy	5 to 10 %
Working temperature	37 C
Stability	5 C to 50 C
Response time	15 minutes