After about 15 yearsof research, Dr C Venkateshwar Laxmaiah, today said that he had developed a chemical formula which separates water and dissolved solids from industrial effluents. Dr Venkateshwar, in-charge of the Botany department of PG College, Secunderabad, said his formula also helps in recycling chemcial substances.The process, which he calls CV Laxman Precipitation technology, helps in removal of TDS and water from effluents to meet WHO standards.