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MBR failures in waste water treatment - ppt

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akalankar

WWTP

Engineering
1 of 1
Stimulus Primary Impact Secondary Impact OC shock F/M increase Increased foaming OC shock Unprocessed sewage increase Increased fouling Saline shock Biomass stress/ inactivation, EPS generation Increased fouling and possible foaming Toxic shock Biomass stress/ inactivation, EPS generation Increased fouling and possible foaming Feedwater dilution (e.g. storm flows) Biomass starvation Reduced water quality Sludge discharge failure SRT and MLSS increase Oxygenation efficiency decrease, clogging propensity increase Aeration blower failure Solids accumulation in membrane channels Sludging Aeration port clogging Localized solids accumulation in membrane channels Localized sludging Screen failure/ overtopping Increased levels of gross solids Braiding/Matting RAS pump failure Solids concentration profile across tank Localized sludging Denitrification failure Inappropriate tank dimensions Solids concentration profile across tank Localized sludging Backflush pump failure Foulant accumulation Increased fouling Relaxation failure Foulant and solids accumulation Increased fouling and clogging Membrane integrity failure Impaired water quality - Inappropriate chemical cleaning protocol Reduced/zero permeability recovery after CIP Increased fouling Overdosed hypochlorite during CIP Biomass inactivation Foulant generation Reduced water quality Solids agglomeration Braiding - System shutdown Biomass inactivation Clogging and fouling propensity increase

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MBR failures in waste water treatment - ppt

  • 1. Stimulus Primary Impact Secondary Impact OC shock F/M increase Increased foaming OC shock Unprocessed sewage increase Increased fouling Saline shock Biomass stress/ inactivation, EPS generation Increased fouling and possible foaming Toxic shock Biomass stress/ inactivation, EPS generation Increased fouling and possible foaming Feedwater dilution (e.g. storm flows) Biomass starvation Reduced water quality Sludge discharge failure SRT and MLSS increase Oxygenation efficiency decrease, clogging propensity increase Aeration blower failure Solids accumulation in membrane channels Sludging Aeration port clogging Localized solids accumulation in membrane channels Localized sludging Screen failure/ overtopping Increased levels of gross solids Braiding/Matting RAS pump failure Solids concentration profile across tank Localized sludging Denitrification failure Inappropriate tank dimensions Solids concentration profile across tank Localized sludging Backflush pump failure Foulant accumulation Increased fouling Relaxation failure Foulant and solids accumulation Increased fouling and clogging Membrane integrity failure Impaired water quality - Inappropriate chemical cleaning protocol Reduced/zero permeability recovery after CIP Increased fouling Overdosed hypochlorite during CIP Biomass inactivation Foulant generation Reduced water quality Solids agglomeration Braiding - System shutdown Biomass inactivation Clogging and fouling propensity increase