H2OLL cyclic absorption atmospheric water generator for producing drinking water from air at low humidity
Containerized atmospheric water generator using cyclic absorption with a salt-based liquid desiccant to capture water vapor from air in arid and semi-arid conditions. Produces 40 liters per hour per container at under 0.7 kWh per liter, operating down to 5 g/kg absolute humidity. Designed for plug-and-play deployment, including fully self-contained operation with solar PV, and targets drinking-water regulatory compliance.
Overview
H2OLL is a patented atmospheric water generation (AWG) system that produces clean drinking water directly from air, including in arid and semi-arid environments. Unlike conventional AWGs that rely on energy-intensive cooling and condensation, H2OLL uses a cyclic absorption process with a salt-based liquid desiccant to capture water vapor from the air. This approach enables consistent performance across a wide range of meteorological conditions, including absolute humidity as low as 5 g of water per kg of air.
The system is delivered as a modular, plug-and-play unit housed in a 20-foot container, enabling deployment at industrial sites, hospitality settings, real estate developments, and emergency response locations. By generating water on-site, H2OLL reduces logistics, plastic waste, and quality variability associated with trucked or bottled water supply chains. The desiccant also functions as a natural physical barrier and sterilizer, helping prevent biological and chemical contaminants from reaching the produced water.
Technical specifications
Key features and capabilities:
- Production capacity of 40 liters per hour per container unit, equating to approximately 350,000 liters per year
- Energy consumption below 0.7 kWh per liter, with a development target of under 0.5 kWh per liter
- Operates efficiently at absolute humidity as low as 5 g/kg, suitable for desert and semi-arid climates
- Containerized 20-foot modular design for plug-and-play installation and scalability
- Solar PV-compatible roof space enabling fully self-contained, energy-free operation
- Synergy potential with host facility HVAC systems for cooling and heating integration
- Salt-based liquid desiccant that doubles as a natural sterilizer and contaminant barrier
- Water quality compliant with drinking water regulations
Performance validation to date:
- Proof-of-concept system operated at the Technion ITT (Israel) environmental technology yard for over two years
- Demonstrated energy consumption between 0.7 and 1.0 kWh per liter at wide climatic conditions
- Recognized with the Water Europe SME Award 2021
Technology readiness level
The H2OLL technology has progressed beyond proof-of-concept, with a validated POC system demonstrating multi-year operation. The current project aims to pilot a scaled-up commercial unit at a facility in Israel, increasing capacity from 10 liters per hour (POC) to 40 liters per hour. The pilot will validate energy reduction strategies, solar PV integration for self-powered operation, and potential synergy with the host plant's HVAC infrastructure. Water quality analysis will be conducted to confirm regulatory compliance. The pilot budget is $73,000, covering system adaptation, installation, commissioning, and monthly operational costs. Upon successful validation, the projected water cost is approximately $50 per 1,000 gallons over a 15-year operational lifespan, covering capital expenditure and maintenance with no ongoing energy cost.
About H2OLL
H2OLL is an Israeli water technology company that has developed a patented cyclic absorption atmospheric water generation (AWG) system designed to produce clean drinking water in arid and semi-arid climates. Unlike traditional AWGs that rely on energy-intensive cooling to condense moisture, H2OLL utilizes a liquid desiccant to absorb water vapor from dry air—operating efficiently even when absolute humidity is as low as 5g/kg. This salt-based desiccant also serves as a physical barrier and natural sterilizer, preventing biological and chemical contaminants from entering the water. The systems are designed as modular, containerized units capable of integration with various energy sources, providing a scalable, sustainable alternative to trucked or bottled water.
The technology addresses global water scarcity by offering a decentralized, on-site water source for industries, hospitality, real estate, and emergency services. By eliminating the logistics, plastic waste, and variable quality associated with traditional water supply chains, H2OLL aims to provide reliable water security. The company’s systems have been deployed in pilot projects, such as in the Negev Desert, demonstrating the ability to produce 1,000 liters of water per day with significant energy efficiency gains. Originating from research at the Technion—Israel Institute of Technology, H2OLL continues to scale its operations with plans for larger capacity units to support broader community and industrial needs.
Inquire about this partnering listing
Looking for
Industry applications
delivered to your inbox.