Open AccessSUSTAINABLE RECYCLING OF HOTEL WASTE WATER IN GOA
Author(s) -
Dilecta D'Costa,
Mahesh Bakal,
Tushar Anvekar
Publication year - 2021
Publication title -
international journal of scientific research
Language(s) - English
DOI - 10.36106/6805353
Subject(s) - environmental science , waste management , wastewater , water quality , water treatment , sewage , laundry , total dissolved solids , water saving , raw water , sewage treatment , total suspended solids , environmental engineering , pulp and paper industry , chemical oxygen demand , engineering , ecology , water resource management , biology
Goa, a tourist destination known for its alarming scenic beauty has seen a consistently rising trend in hoteloccupancy for star category hotels. On an average a luxury hotel would consume approximately 200,000 litresof water per day. The waste water generated from this consumption is basically 30% of black water (sewage)and 70% of grey water (bath water, laundry waste water, etc). A study was carried out to harness the potentialof grey water before dumping into water bodies per se. A membrane based bio reactor (MBR) designed forchemical and biological treatment of this waste water includes mechanisms like coagulation, flocculation &separation of the water ludge. The water is then validated for its BOD & COD levels as per the governmentnorms and then membrane filtered to remove total dissolved solids (TDS). This filtered water is then subjectedto biological treatment whereas the sludge is used in landfills. EM technology uses commercially availableculture of microorganisms, comprising of Lactobacillus, photosynthetic bacteria and yeast for biological treatmentof the waste water to render it safe for human use. Monitoring and water quality analysis revealed that microbialtreatment considerably reduced the BOD. This innovative technology allows the recycling of waste water whichcan be made use of for different purposes like gardening, cleaning floors & hotel properties, washing of cars &flushing. Moreover, it requires low foot print and involves easy installation and less maintenance. Recycling of grey waterwould in turn curtail consumption, thus cutting cost for purchase of water and ensuring safety of consumers. In additionto MBR & EM Technology being economically feasible, safe and user-friendly, its usage is highly recommended tomaintain a stable water table and preserve the integrity of the hospitality industry in Goa. It is surely an initiative tominimize water crisis thus maintaining a sustainable ecosystem.