Zero Liquid Discharge
Zero Liquid Discharge (ZLD) is an advanced treatment process in which virtually all wastewater from various industrial processes is treated and reused, thus leaving behind no effluent or liquid discharge.
Due to increasingly stringent regulatory standards governing industrial waste, ZLD is gaining popularity as a means of sustainable production, minimizing environmental impact, recovering valuable products from waste streams, and reducing manufacturing costs.
A typical ZLD process consists of several wastewater treatment methods and includes RO and UF membrane filtration, evaporation/crystallization and fractional electro-deionization. The image below provides a general process flow overview of a ZLD system.
ZLD processing schemes may include the following components: a thermal brine concentrator, thermal crystallizer, evaporation ponds, a second-pass RO system and landfill.
Membrane products for ZLD applications
Berghof Membranes provides exceptionally robust ultrafiltration solutions for zero liquid discharge applications in various industries. Our products and solutions are used to treat challenging RO concentrate feed streams, to serve as an effective pretreatment for second-pass RO systems, minimize the potential for scaling in cooling tower applications, recover valuable minerals and resources, minimize the energy-impact of evaporators and crystallizers, and limit the environmental load on landfills.
ZLD solutions of Berghof Membranes
Berghof Membranes provides ultrafiltration membrane solutions for ZLD applications in various industries, such as:
- Mining industry
- Chemical industry
- Tanneries and textile industry
A large thermal solar plant in Mojave desert, California faces the unique challenge of treating the concentrate of reverse osmosis. Due to water scarcity, increasing the cost of tap water and wastewater discharge, the company is forced to concentrate recovery and reuse their water.