LANDSON / METAL PROCESSING
TREATING HOT, ALKALINE METAL WASTEWATER
TREATING HOT, ALKALINE METAL WASTEWATER
TREATING HOT, ALKALINE METAL WASTEWATER
SiC pretreatment before NF and RO handles suspended solids under demanding alkaline, high-temperature conditions.
SiC pretreatment before NF and RO handles suspended solids under demanding alkaline, high-temperature conditions.
SiC pretreatment before NF and RO handles suspended solids under demanding alkaline, high-temperature conditions.
Treatment challenge
Treatment challenge
Treatment challenge
Metal washing wastewater contained around 1% suspended solids under highly alkaline conditions (pH 13) and temperatures of 65°C.
Metal washing wastewater contained around 1% suspended solids under highly alkaline conditions (pH 13) and temperatures of 65°C.
Landson SiC membrane solution
Landson SiC membrane solution
Landson SiC membrane solution
Recrystallized SiC pretreatment removes solids ahead of downstream nanofiltration and reverse osmosis, protecting the polymer membrane stages.
Recrystallized SiC pretreatment removes solids ahead of downstream nanofiltration and reverse osmosis, protecting the polymer membrane stages.
Reported performance and operating conditions
Reported performance and operating conditions
Reported performance and operating conditions
Stable filtration flux approximately 150 LMH; overall water recovery 95%; suspended solids reduced from 1% in feed to <0.015% in permeate; pH 13; 65°C.
Stable filtration flux approximately 150 LMH; overall water recovery 95%; suspended solids reduced from 1% in feed to <0.015% in permeate; pH 13; 65°C.
Technical configuration
Technical configuration
Technical configuration
Metal-washing wastewater · SiC membrane pretreatment → NF → RO · Strongly alkaline process stream.
Metal-washing wastewater · SiC membrane pretreatment → NF → RO · Strongly alkaline process stream.
Project status and significance
Project status and significance
Project status and significance
The application demonstrates solids removal in high-pH, high-temperature conditions while supporting recovery of process water and downstream NF/RO operation.
The application demonstrates solids removal in high-pH, high-temperature conditions while supporting recovery of process water and downstream NF/RO operation.
Interpreting the results
Interpreting the results
Interpreting the results
Figures reflect the project information in the Landson case-study materials and are application-specific.
Figures reflect the project information in the Landson case-study materials and are application-specific.
95% Water recovery · pH 13 Operating environment
95% Water recovery · pH 13 Operating environment