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A combination of (PAC/CFS)/NF has achieved good wastewater quality; COD was reduced to 4 mg/L, while the final turbidity value was 0.6 NTU. Overall NF results with and without pretreatment are shown in Table 5.

Table 5

NF results for biodiesel wastewater with and without PAC/CFS pretreatment

ParameterRaw wastewaterAfter NF without pretreatmentAfter NF with pretreatment
Turbidity (NTU) 12 0.6 0.6 
COD (mg/L) 526 95 
Flux (L/m2h) – 22.3 28.7 
ParameterRaw wastewaterAfter NF without pretreatmentAfter NF with pretreatment
Turbidity (NTU) 12 0.6 0.6 
COD (mg/L) 526 95 
Flux (L/m2h) – 22.3 28.7 

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