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Biomass Production of Azolla pinnata in Different Wastewater
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Usage of Azolla pinnata in wastewater treatment has great advantages in the environment. Besides its utilization as a water purifier plant on wastewater, Azolla sp. can be used as an animal feed and bio fertilizer. This research study was conducted to assess the biomass production and the treatment efficiency of Azolla sp. in different types of industrial wastewater from rice mills, the food industry and vehicle services stations. A split-plot experimental design was used with 4 replicates. For this study, eight artificial ponds were constructed by using polythene sheets. The size of each pond were 150×50×40 cm3. Out of eight ponds, three ponds were filled with three different types of wastewater, one was filled with groundwater and 90 g of Azolla sp. plants were introduced into them. Further, balance four ponds were filled with the same three different types of wastewater and groundwater. Ground water was used as a control to observe the growth of Azolla sp. without effect of wastewater. Each of the ponds was filled with 50 L of wastewater. Then the water quality parameters such as pH, EC, COD, BOD, TDS, TSS, temperature, oil and grease content and the biomass production of Azolla sp. were analyzed on the first day, the 7th day and the 14th day. Most of the water quality parameters in three different types of industrial wastewater were improved with Azolla sp. Significantly, a higher dry weight of Azolla pinnata was recorded in rice mill wastewater and the least values recorded in the service station wastewater. There are significant differences (p<0.05) among the water quality parameters such as EC, TDS and TSS of the four experiments. A significant difference was observed in EC, TDS and TSS of the Azolla sp. grown rice mill wastewater compared to control. EC of the food industry wastewater showed a higher significant difference. EC and temperature showed a highly significant difference in the service station wastewater.
Keywords: Azolla pinnata, Waste water, Biomass, Water quality
University of Sri Jayewardenepura
Title: Biomass Production of Azolla pinnata in Different Wastewater
Description:
Usage of Azolla pinnata in wastewater treatment has great advantages in the environment.
Besides its utilization as a water purifier plant on wastewater, Azolla sp.
can be used as an animal feed and bio fertilizer.
This research study was conducted to assess the biomass production and the treatment efficiency of Azolla sp.
in different types of industrial wastewater from rice mills, the food industry and vehicle services stations.
A split-plot experimental design was used with 4 replicates.
For this study, eight artificial ponds were constructed by using polythene sheets.
The size of each pond were 150×50×40 cm3.
Out of eight ponds, three ponds were filled with three different types of wastewater, one was filled with groundwater and 90 g of Azolla sp.
plants were introduced into them.
Further, balance four ponds were filled with the same three different types of wastewater and groundwater.
Ground water was used as a control to observe the growth of Azolla sp.
without effect of wastewater.
Each of the ponds was filled with 50 L of wastewater.
Then the water quality parameters such as pH, EC, COD, BOD, TDS, TSS, temperature, oil and grease content and the biomass production of Azolla sp.
were analyzed on the first day, the 7th day and the 14th day.
Most of the water quality parameters in three different types of industrial wastewater were improved with Azolla sp.
Significantly, a higher dry weight of Azolla pinnata was recorded in rice mill wastewater and the least values recorded in the service station wastewater.
There are significant differences (p<0.
05) among the water quality parameters such as EC, TDS and TSS of the four experiments.
A significant difference was observed in EC, TDS and TSS of the Azolla sp.
grown rice mill wastewater compared to control.
EC of the food industry wastewater showed a higher significant difference.
EC and temperature showed a highly significant difference in the service station wastewater.
Keywords: Azolla pinnata, Waste water, Biomass, Water quality.
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