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：7
页码：12815
DOI：10.15680/IJIRSET.2016.0507137
出版社：S&S Publications
摘要：The wastewater generated in dairy industry contains very high organic loading and total solids and ismostly treated in ETP (Effluent Treatment Plant ), where the sludge is formed increasing the expenditure for processingand disposal along with the operation cost. Earthworms body act as a ‘biofilter’ and they were found to increase theremoval efficiency of BOD3 – 89.3 %, 86.5 %, 91.6 %, COD – 81.6 %, 80.3 % ,85.4 %, TS – 82.3 %,73.9 %, 85.5 %,TDS - 85.6 %, 82.9 %, 87.1 % and OIL and GREASE content by 97.2 %, 97.2 %, 99 % for single earthworm speciesof reactor 1 and reactor 3 and mixed earthworm species for reactor 2 using black cotton soil for about 98 days and forvaried bed depths using garden soil of 10 cm, 15 cm and 20 cm for mixed earthworm species of reactor 1, reactor 2and reactor 3 for about 40 days were found to be of BOD3 – 78.45 %, 68.35 %, 54.52 %, COD – 55.56 %, 46.42 %,23.37 %, TS – 55.32 %, 42.02 %, 23.37 %, TDS – 60.67 %, 50.15 %, 25.38 % and OIL and GREASE – 29.9 %, 16.82%, 9.34 % . The height of vermibed is considered as an important factor in vermi-filtration method. Earthworm treatthe wastewater by the mechanism in the process include: ‘feeding’ and ‘biodegradation. Also increase the hydraulicconductivity and natural aeration by grinding the soil particle. In the present study three vermi-filters and one nonvermi- filter was designed. The effluent passed through top layer of the filter and found out the removal efficiency ofphysicochemical parameter. The suspended solids trapped on top of the vermi-filter and processed by earthworms.There is no sludge formation in this process which requires additional expenditure on landfill and disposal. The processis odour - free, ecofriendly and cost effective. The final vermi-filtered water was clean enough to be used for irrigation,in parks and garden.
关键词：Vermi-filtration(VF) ; Non-vermifiltration(NVF); Vermibed height; Eisenia fetida; Eudrilus eugeniae;Garden soil; Black cotton soil; Odor - free process
