期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2016
卷号：5
期号：8
页码：14901
DOI：10.15680/IJIRSET.2016.0508113
出版社：S&S Publications
摘要：The large amount of highly turbid effluent generated from the dairy industries was discarded as it isbecause of the difficulties in its treatment. Dairy waste water contains higher quantity of dissolved or colloidal organicmatter and hence higher BOD and COD values. In the present study, the dairy effluent was treated through Vermifiltrationsystem with Eudriluseugeniae earthworm species. Vermi-filter bed of 20cm thickness, sand of 10cm andgravel media of 21cm depth was used in the Vermi-filtration unit and Hydraulic Retention time was fixed for durationof 2, 4 and 6 hrs. The hydraulic conductivity and natural aeration was enhanced by the earthworms, which granulatesthe clay particles. They also enhance the absorption ability by grinding the slit and sand particles into smaller size.From the study, variation in pH due to activity of earthworms lies within the ISI standard. Vermi-filtration usingEudriluseugeniae earthworms was removed 87 % of Total suspended solids, 97.8% of oil and grease, reduced 95% ofBOD and 83% of COD. This is an odor-free process and no sludge formed in the vermin-filtration unit during the dairywastewater treatment. The treated waste water was clear and good enough for irrigation purpose or parks and gardens.
