Climbing perch culture wastewater treatment with Azolla microphylla

Abstract

The purpose of this research was to study the effluent treatment from Climbing Perch culture using Azolla microphylla. on effluent treatment from Climbing Perch culture. The 5x3 factorial in completely randomized design was used with 3 replications. The effluent without Azolla microphylla was a control sample which was divided into 2 factors. The first factor was that Azolla microphylla biomass levels were 0, 0.2, 0.4, 0.6, and 0.8 kg/ 50 l of the effluent. The second factor was that water quality treatment duration was 10, 20, and 30 days. The effluent samples were analyzed for water quality indices which were pH, DO, BOD NH3, TSS, TN, and TP. The data collection was used for analysis of variance and mean comparisons using Duncan's new multiple range test (DMRT) method at 95% of reliability. The results showed that the treatment efficiency reduced at 0.2 kg of Azolla microphylla and 20-day treatment duration, pH=8.51±0.44, DO=5.85±2.39, BOD=1.05±0.31 mg/l, TSS=1.17±0.07 mg/l, TP=0.04±0.00 mg/-P/l. 0.8 kg of Azolla microphylla and 20-day treatment duration showed that NH3 = 0.53±0.01 mg.N-/l and TN=, 0.93±0.13 mg-N/l. The use of Azolla microphylla biomass at different levels and appropriate time for biomass change showed a statistically significant difference averaged between 678.3-1696.7 g/m2 at 0.2, 0.4, 0.6, and 0.8 kg. The study of Azolla microphylla’s nitrogen and phosphorus content was found that after treatment at 0.8 kg for 30 days, the highest nitrogen content of Azolla microphylla was 25.28±0.00% and 28.89±0.15% for the highest phosphorus content. The increase in the yield of Azolla microphylla in this study was a result of the nutrient in the effluent from which the Azolla microphylla could absorb for its growth and biomass increasing over an extended period of time.