GERMANE CODE OF PRACTICE DESTINED FOR SITE-SPECIFIC REGULATORY AND RESTORATION ADVISORY STRENGTHENING INTEGRITY AND SURVIVAL OF THE LAKE ECOSYSTEMShekhar Salunke and Balbhim Chavan
A diagnostic study was conducted at the lake under investigation. After identifying the problem of deterioration of the ecological health evident by the impaired quality of water, a site-specific prototype for the coherent treatability likelihood and restoration, was designed and assessed for its effectiveness towards polluted lake water treatment. The aim was to meet the IS 10500 water quality standards after a combined treatment and preordain a methodology for primary and secondary and if needed tertiary treatment for potable purpose. For the diagnostic study a detailed representative data collection was carried out with the help of 20 L representative sample, for characterization and treatability study of the polluted lake water under investigation. The treatability study was carried out for a specified short period. The samples of water were subjected for different treatability studies. The higher values were considered for feasibility report infrequent streams of water with a higher load value. The treatability study was merely to identify and approve a germane code of practice for the treatment methodology. The composite sample was prepared and analyzed following methods depicted in the Standard methods of water analysis, APHA nineteenth Edition. The studies conclude with a recommendation of primary treatment consisting of settling tank required for storage of 1-hour retention, Alum/PAC dosing recommended for fast removal of settable solids, aerobic treatment by biofilter/cascading recommended for COD and BOD removal, the rapid or slow sand filterat this stage is recommended for the removal of residual suspended matter and turbidity. Nevertheless, color and odor removal can be achieved by the use of carbon filter treatment and disinfection by chlorination with 0.2 mg/L dose required for the lake water treatment.