Treatment of Vertical Blending Commercial Liquid Substances by Natural Recreation Eranthemum Nigrum Biotic System

These One of the most trusted and low maintenance and low in operation costs of wastewater treatment is the setup of and operation of a Vertical Flow Constructed Wetland. These wetlands systems have a very good ability to handle the sudden increase in the amount of domestic wastewater and sudden increase in a load of various contents of the wastewater. The plant here used in this wetland setup is Eranthemum Nigrum. The plant was specifically chosen for its growth of roots and development of rootzone in the soil providing more contact area and substrate for the microorganisms for their processing and playing an important role in the treatment of wastewater. A constructed wetland unit of capacity 20 litres was constructed to treat the domestic wastewater with COD and BOD values of 544 and 270 mg/L respectively. The wetland media consisted of soil and a fine aggregate bed. The bed is filled to a height of 15cm with soil of size 2 μm. The soil used for the growth of plants is laterite soil for a depth of 15cm. and fine aggregate depth is 5cm, size 300 μm. The plant used in this treatment is Eranthemum Nigrum. About 40 Eranthemum Nigrum of an average size of 30 cm are used in the constructed wetland. From the test reports, it was observed that all the pollutants were reduced to 50-80%. The highest BOD and COD removal occurred at the retention time of 6 days. The Eranthemum Nigrum plant showed good efficiency. The average removal of TDS, Nitrate, and Phosphate for a retention time of 1, 2, 4, and 6 days was 60%, 75%, 80 and 90% respectively. The treated water can be used safely for household works and irrigation purposes as the test results were within the IS standard limits. There was an increase in the height of the plant about 2-3cm averaging from the actual height. Hence the overall removal efficiency of plant Eranthemum Nigrum was proved to give better efficiency compared to conventional plants. This method can be used for small-scale domestic wastewater.