Vol. 11, Issue 12 (2022)

Author(s):
Paramveer Singh, Rachna Gulati, Gajender Singh, Ashutosh Luwanshi, Reecha Sharma and Rahul Kumar

Abstract:
In super intensive fish farming practices, elimination of waste is a major concern leading to water contamination. Micro screens of drum filter are the key component of Recirculatory Aquaculture Systems (RAS). Treatment efficiency of micro screen under RAS also varies according to its rotator drum filter size, flow rate and mesh screen size. The aim of the present study is to represent on farm RAS survey of Haryana region regarding the use of its key components for culture purpose. Because, still there is lack of pragmatic data regarding RAS components efficiency on the basis of its size and flow rate. The result of the study concluded that in Haryana state of India mostly fish farmers prefer to install 50 micron mesh screen rotator drum filter as a primary component with flow rate of 38000 – 40000 litre water per hours as compared to 40 and 30 micron filter which has more efficiency to filter the water. Besides this, our 90 days survey across 12 districts fish farmer’s samples size represents that only 11% farmers are utilizing 40 micron mesh screen drum filter, 5% utilizing 80 micron drum filter and 68% utilizing 50 micron drum filter in their RAS as primary filtration component. Moreover, as far material is concerned then 11% farmers uses Nylon mesh screen, 74% stainless steel micro screen and rest 16% fish farmers did not use drum filter in their backyard RAS. Much variation in this component has directly influenced the water quality management and fish economics. Smaller micron size drum filter has higher efficiency to filter the small size total suspended solids or particles from water which leads to the production of obnoxious gases like ammonia and nitrite. Around 58% of RAS farmers opted for tarpaulin, tin and iron as their tank construction material. Additionally, 42% farmers preferred the use of branded material for their RAS components. Stainless steel, aluminum, bricks and cement are the crucial ingredients used in composition of different RAS filtration components by 60% farmers. For the construction of RAS sheds, 73% farmers used Bricks, Cement, iron and tin shed.