A Synergistic Approach For Domestic Effluent Treatment

Abstract

The aim of the present work was to treat domestic effluent using the newlineisolated indigenous bacteria and immobilizing them in a hydrogel matrix in the form of a synthetically developed consortium for providing a greener, efficient and newlineinexpensive method of treating the wastewater. The study started with the collection of domestic effluent from two scales of wastewater treatment plants (WWTPs) - WWTP I and WWTP II. WWTP I (located at sector 56, Noida) received wastewater from a major portion of Noida city and WWTP II (located sector 125, Noida) received wastewater from a restricted Institutional area. The water quality of WWTP I was much deteriorated as compared to WWTP II and thus required immediate treatment. Hence, we used this effluent for treatment through our work. The results showed that they detoxified the effluent naturally as well but the pollution parameters did not fall within the permissible limit given by WHO. So, we proceeded with the development of bacterial consortia, systematically, using the permutation-combination formula. Out of the 21 sets of consortia developed in the laboratory, with 5 bacteria in each set, Consortium 2 grew well in nutrient broth medium as well as on nutrient agar plate, in terms of synergism among the constituting strains and therefore, we chose Consortium 2 for our further studies. The present work demonstrated formulation of a potent consortium (Consortium 2) using the isolated indigenous bacteria in the laboratory, which was assessed for its bioremediation efficiency and then immobilized in a novel ratio of newlinePVA/GA derived hydrogel for application in domestic effluent treatment. The newlinereduction in organic toxicants of domestic wastewater by immobilized consortium newlinewas assessed through HPLC and GC-MS analyses. Thus, the current study, within limited framework merits special importance towards remediation of organic and inorganic pollutants in a wastewater treatment plant. newline newline