200m ³/d to alleviate the freshwater crisis on islands, less than 4 yuan per ton of freshwater

Project Introduction

1.Basic project information

Project Name	Putuo Luojia Mountain 200m3/d Island Seawater Desalination Project
Project Type	Seawater Desalination
Project Location	Putuo Mountain Scenic Area
Project Launch	April 2025
Project Delivery	September 2025
Project Status	Delivered and running stably

2.Project Background and Requirements

Mount Luojia, a small suspended island facing Mount Putuo across the sea, attracts a continuous stream of pilgrims and tourists with its unique landscape of "reclining Buddha on the sea" and profound Buddhist cultural heritage. However, as an island far from the mainland, Mount Luga faces a common pain point among all suspended islands - extreme scarcity of freshwater resources.
There is no stable surface runoff and underground freshwater layer on the island, and domestic water has long relied on shipping for supply. With the booming development of the tourism industry, the number of monks, workers, and increasing tourists on the island has led to a sharp increase in water demand. The original water supply model is not only expensive and inefficient, but also subject to weather and sea conditions, making it difficult to ensure water supply stability, which seriously restricts the sustainable development of islands and the quality of tourist experience. Finding a stable, economical, and sustainable freshwater solution has become the core issue that urgently needs to be addressed in Mount Luojia.

Core Configuration	description
Core components	SWRO-HR8040 Ro membrane
Number of membranes	15pcs
Water production volume	200m³/d

In order to completely solve the water problem of Logar Mountain, we have customized a set of seawater desalination system with stable daily output of 200m ³. The project adopts advanced SWRO-HR8040 (15 pieces) RO membrane modules. The core of the scheme is its high efficiency and stability, which aims to convert the inexhaustible seawater into high-quality fresh water meeting the World Health Organization (WHO) drinking water standards, sufficient to meet the water demand of daily life and tourism peak on the island, and its modular design also facilitates future maintenance and expansion.

3.Project effect and economic benefit

Parameter	Raw Water Data	Filtered water data
PH	6-9	6-9
SS(mg/L）	＜100	0
TDS（mg/L）	＜30000	＜300
Turbidity	—	≤ 1 NTU
Recovery rate	—	35-50%
Note: Complies with WHO drinking water standard.

Significant economic benefits
When the project is put into production, the operating cost of water production shall be controlled at a very low level of 3.6-4.2 yuan/t. This cost advantage is very significant compared to the expensive shipping of fresh water in the past, which saves a lot of money for the operation and management of the island.

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