Minimum Liquid Discharge in an Extremely Limited Footprint
Only Gradiant was able to provide a Minimum Liquid Discharge solution to meet the client’s demanding performance specification within an extremely limited existing footprint. Engineering a bespoke Carrier Gas Extraction design where others had failed.
End User: Global Pharmaceutical Company
Solution: Minimum & Zero Liquid Discharge
Feedwater Source: Wastewater from Medicine Production
Technology: Carrier Gas Extraction (CGE), Agitated Thin Film Dryer (ATFD)
System Configuration: 2 x 50% CGE and 100% ATFD
System Capacity: 288 m³/day
System Recovery: 98%
Online Date: June 2022
Delivery Model: Design-Build (DB)
A global pharmaceutical and biotech company’s antibiotics manufacturing plant in Singapore produced wastewaters containing organic solvents and unrecovered amoxicillin products, which were restricting overall manufacturing yields and waste disposal. The primary challenge was to identify a compact process solution that could sustainably treat high COD, TDS, and Chlorides feedwater. All within an extremely challenging limited footprint available at the brownfield site. The client had been unsuccessful sourcing a credible solution – enter Gradiant.
A bespoke version of our Carrier Gas Extraction technology – patented and award winning. The dedicated project delivery team deployed bench-scale lab testing to demonstrate proof of concept and the proven cost advantages of using CGE. Quantified results were complimented by in-house unique design innovation for the design-build project phase of this MLD facility – creating savings of 35% in CAPEX and 50% in OPEX relative to competitors.
In an unprecedented deployment, Gradiant’s engineers designed the CGE technology as two 32-meter towers in order to accommodate the existing facility’s very limited footprint. The CGE technology has been proven to help other clients achieve 20x brine concentration, and when combined with ATFD, reduce overall disposal volumes by over 98%, while lowering effluent COD and TDS concentrations. The ZLD process scheme feeds the remaining concentrated brine to an Agitated Thin Film Dryer to achieve >80% purity solids cake.
Reduction in Disposal Volume
Up to 35% less thermal energy than Multi-Effect Evaporation and Distillation (MEE, MED) systems
Up to 50% CAPEX and OPEX Savings versus the Competitors
Up to 50% Electricity Savings compared to Mechanical Vapor Compression (MVC) evaporation
Figures & Images
Process Flow Diagram
Carrier Gas Extraction Process Flow Schematic
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