A combination of CFS/NF has achieved good wastewater quality. COD was eliminated totally, while the final turbidity value was 0.6 NTU. Overall NF results with and without pretreatment are shown in Table 4.

Table 4

NF results for secondary treated wastewater with and without CFS pretreatment

ParameterRaw wastewaterAfter NF without pretreatmentAfter NF with pretreatment
Turbidity (NTU) 12 0.6 0.6
COD (mg/L) 50
Flux (L/m2h) – 24 32.1
ParameterRaw wastewaterAfter NF without pretreatmentAfter NF with pretreatment
Turbidity (NTU) 12 0.6 0.6
COD (mg/L) 50
Flux (L/m2h) – 24 32.1

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