Experimental Study on Treatment of Aquaculture Wastewater by Chlorella Based on AQUATOX Simulation
In order to low carbon and fast treatment of aquaculture wastewater,the optimal solution for wastewater treatment by Chlorella was explored.The water body of a Spanish mackerel aquaculture base taken as the object,the water ecological environment model was established by using AQUATOX software.Five simulation groups were established according to different aquaculture wastewater concentrations,hydraulic retention times and flow rates.5 mg/L of Chlorella algae species after dilution were added in the simulation groups.The treatment performance of Chlorella was obtained by the simulation experiments.Based on the the results of simulation and the actual measured data,the optimal ratio of Chlorella spiked was ρ(Chlorella)∶ρ(TN)∶ρ(NH3-N)∶ρ(TP)∶ρ(CODCr)= 1∶16.8∶3.2∶0.8∶40;the treatment efficiencies of Chlorella spiked with the optimal ratio on the TN,NH3-N,TP,and CODCr in the wastewater reached 73%,94%,72.5%,and 75%,respectively.Biomass has also reached 26 times of the initial value.The application of the AQUATOX model can be quickly achieved to optimise the Chlorella treatment scheme for aquaculture wastewater,and the average relative errors of the simulation results for TN,TP,NH3-N and CODcr mass concentrations were 0.32%,2.52%,4.83%and 0.10%,respectively.
chlorellaaquaculture wastewater treatmentAQUATOX modeloptimization schemeanalog control
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