International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 09 Issue: 05 | May 2022
p-ISSN: 2395-0072
www.irjet.net
Effect of Earthworm on Physicochemical Parameter of Domestic Greywater: A Review Prof.A.M.Kharwade1, Prerna K. Shinde2, Kirti A. Rathod3, Shilpa A. Selokar4, Pramod P. Thakare5, Rajat V. Bhoyar 6 Assistant professor, Environmental Engineering, Nagpur Institute of Technology, Nagpur 2,3,4,5,6Final Year Student, Nagpur Institute of Technology, Nagpur ---------------------------------------------------------------------***--------------------------------------------------------------------1
Abstract - The fundamentals Due to rising water demands, water scarcity has become one of the world's most pressing
challenges. According to reports, around 80% of the water supply consumed by society returns to the sewer system as household wastewater. Earthworms play a critical role in the purification of wastewater and solid stabilization in the Vermifiltration principle. Earthworms are extremely sensitive to changes in atmospheric conditions as well as soil, water, and wastewater qualities. Eisenia Fetida will be the finest species to treat diverse wastewaters among various categories. Heavy metal ions, on the other hand, do not interact. The Vermifiltration technique has applications in both urban and domestic water treatment.
Key Words: Vermifiltration, Earthworms, Wastewater 1. INTRODUCTION Due to insufficient treatment infrastructure, wastewater creation and treatment has become a significant health issue in developing countries. The most significant source of contamination of water resources is the discharge of untreated wastewater into surface and subsurface watercourses. For the treatment of domestic wastewater, the majority of the population in rural and urban areas of developing countries rely on onsite systems. For the treatment of rural home wastewater, treatment systems with minimal costs, energy, and maintenance are preferable [1]. Due to rising water demands, water scarcity has become one of the world's most pressing challenges. According to reports, around 80% of the water supply consumed by society returns to the sewer system as household wastewater. The vast majority of the many types of effluents discharged by various companies are disposed of in the open environment, polluting soil and water resources. Individual wastewater treatment, whether physical, chemical, or biological, is frequently quite expensive and produces a lot of sludge. As a result, alternative therapeutic methods are required. [2] Vermifiltration of wastewater with earthworms is a relatively recent concept. The general method of "ingestion and biodegradation of organic wastes, heavy metals, and solids" has been discovered to remove the 5 days BOD (BOD5), COD, total dissolved solids (TDS), and total suspended solids (TSS) from wastewater by earthworms. [4] They are absorbed through the body walls and from wastewater. By boosting the number of soil microorganisms, earthworms propel and assist microbial activity in Vermifilter. Except for pumping, vermifiltration requires no external energy. As a result, it can be extremely beneficial to small towns, colonies, and villages. Because other wastewater treatment technologies, such as a manmade wetland, stabilization pond, and other typical technologies, require more space than term filtration, vermifiltration is more dependable. Furthermore, the term filtration method has been shown to be as effective as the activated sludge procedure. There is no sludge production in the process, which eliminates the need for additional landfill disposal costs. This procedure is also odourless, and the resulting vermifltered water is safe to use in parks and gardens, as well as for farm irrigation. [4]
Vermiremediation Process Earthwormâs works Natural Bioreactor Vermifiltration is a more efficient and recently developed method. Vermifiltration is a low-cost, odourless, and labor-intensive intense technique of wastewater treatment that does not require a great amount of space to set up. Because of its efficacy in eliminating contaminants from wastewater and its good environmental consequences, vermifiltration technology has been extensively researched (Natarajan et al., 2015). Vermifiltration is a relatively new method that uses earthworms to filter biologically contaminated wastewater. Microbes play a vital part in the vermifiltration system in this technology, and they also give extracellular enzymes to aid the earthworm in the fast breakdown of organic compounds in the Vermifilter bed. [2] Earthworms have 600 million years of garbage and environmental management experience. They were dubbed the "unheralded soldiers of mankind" by Charles Darwin, and the "intestine of earth" by Greek philosopher Aristotle, implying that they digested a vast variety of organic components from the ground, including waste organics. Earthworms are segmented organisms with no bones that are long, cylindrical, slender, and bilaterally symmetrical. The body is dark brown, gleaming, and completely covered in cuticle. After 8â10 weeks, they weigh around 1,400â1,500 milligrams. 2,000 adult worms weigh 1 kg on
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