Haina Environmental Protection

05/08/2025

High-Pressure Membrane Technology Breaks Through the Challenge of High-Salinity Wastewater Treatment

Concentration of high-salinity wastewater, zero liquid discharge, and deep utilization of seawater desalination—these ultimate challenges in the industrial environmental protection field have found a breakthrough thanks to advances in high-pressure reverse osmosis membrane technology. While traditional reverse osmosis membranes approach their limit at 800 psi, the HP series high-pressure membranes developed by Hangzhou Haina Environmental Protection Technology Co., Ltd. boast military-grade pressure resistance of 1200 psi (8.27 MPa), pushing brine concentration to industry-leading levels of over 80,000 ppm—more than 20 times the salinity of seawater.

This breakthrough directly addresses key industry pain points:
Reduced energy consumption: Single-stage concentration replaces multi-stage processes, cutting system energy usage by over 30%.
Revolutionized cost structure: Reduces brine volume by more than 90%, slashing evaporation and crystallization investment by over half.
Extreme performance: Enables near-zero liquid discharge in sectors such as coal chemical processing and hazardous waste treatment.

The core technological barriers are reflected in three major innovations:
Military-grade structure: Utilizes a PEEK-reinforced central tube, enhancing deformation resistance by 3 times.
3.5mm ultra-wide flow channel: Breaks through the traditional 2.8mm limitation, effectively resolving fouling issues in high-turbidity water.
Self-healing membrane interface: Maintains dynamic charge balance within a pH range of 2–11, adapting to acid-base fluctuations in chemical wastewater.

The R&D team, led by PhDs and Masters in the membrane separation field and working in collaboration with institutions like Zhejiang University, has accumulated over 60 patents. Their surface charge modification technology has improved membrane anti-fouling performance by 40%.

From Lab to Battlefield: A Revolution in Industrial Efficiency
▶ Zero Liquid Discharge Redesign in Coal Chemical Industry
A major coal chemical group simplified its process from “softening → dual-stage RO → DTRO → evaporation & crystallization” to “pre-treatment → single-stage concentration with HP80 → evaporation & crystallization” using HP80 high-pressure membranes. The results were remarkable: system recovery rate soared from 68% to 85%, and the cost per ton of water dropped from ¥12.6 to ¥7.34.
▶ Cost-Breakthrough in Seawater Desalination
In a Bohai Bay project, the HP70-400 membrane combined with energy recovery devices reduced high-pressure pump energy consumption by 42%. For the first time, freshwater production cost fell below the critical ¥4/m³ threshold, offering a cost-effective solution for water-scarce coastal cities.
Let Chinese Membranes Power the World’s Water Flow
From the water wisdom of Liangzhu Ancient City to today’s "China Core of the Membrane World," Haina Environmental continues its mission to “make water cleaner.” As HP high-pressure membranes are exported to Middle Eastern desalination plants, and anti-fouling membranes operate around the clock in Amazonian mining zones, Chinese innovation—powered by 8.27 MPa of resilience—is reshaping the global water cycle.

04/08/2025

The pulse of the times stirs our green dream.
Every purification of water is a commitment to the future.
Haina Environmental Protection , Using membrane technology, safeguarding the source of life.

01/08/2025

Low-pressure reverse osmosis membrane: PLUS-400-LP

Low Pressure, High Efficiency: At a pressure of 225 psi (approximately 1.55 MPa), a single membrane element achieves an average daily water output of 28 m³ and a stable 99.7% salt rejection rate. This reduces operating pressure by 30%-50% compared to traditional reverse osmosis membranes, significantly saving energy.

Anti-Fouling Design: A reinforced membrane structure utilizes spiral wound membrane technology to reduce organic fouling and improve recovery rates from chemical cleaning, reducing cleaning frequency by over 30%.

Wide Adaptability: Operating within a pH range of 2-11 and withstanding water temperatures ≤45°C, it can handle high SDI (

31/07/2025

Always falling into traps when installing a water purifier at home? Understand the differences between ultrafiltration, nanofiltration, and reverse osmosis membranes in one article

As water quality issues become increasingly prominent, more and more households are choosing to install water purifiers to improve the quality of their drinking water. However, the market is full of various types of water purifiers, and the differences in technology often leave consumers confused. Among the many water purification technologies, ultrafiltration, nanofiltration, and reverse osmosis membranes are the most common. So, what are the differences between them? How can you choose the right water purifier according to your household needs? Today, we will analyze the characteristics of these technologies in depth to help you make an informed choice.

Ultrafiltration
Uses membranes with smaller pore sizes, usually around 0.01 microns. It can remove finer impurities, including bacteria, some viruses, and most colloidal substances. Although ultrafiltration provides good water treatment results, it still cannot filter out dissolved salts and some small molecules in water.
Suitable scenarios for ultrafiltration
For households with relatively clean water quality, ultrafiltration can effectively remove bacteria and some impurities while retaining minerals and trace elements in the water. For households without special water quality requirements, an ultrafiltration water purifier can be a suitable choice.

Nanofiltration
Nanofiltration technology is a membrane filtration technology that falls between ultrafiltration and reverse osmosis, with a pore size generally around 0.001 microns. It can filter even finer substances. Nanofiltration can not only remove bacteria, viruses, and colloidal substances but also effectively eliminate harmful ions in water, such as heavy metals and pesticide residues. However, some small molecular dissolved substances can still pass through.
Suitable scenarios for nanofiltration
Suitable for areas with poor water quality that contain more dissolved harmful substances, as it can remove more harmful substances from the water.
If your household is located in an area with poor water quality, a water purifier with nanofiltration technology will deliver better results.

Reverse Osmosis
Reverse osmosis technology is currently the most advanced water treatment technology. The pore size of its filtration membrane is typically 0.0001 microns, capable of completely filtering out most substances in water, including bacteria, viruses, heavy metals, harmful chemicals, and dissolved salts. The reverse osmosis system applies pressure to the water, allowing water molecules to pass through the extremely fine reverse osmosis membrane while filtering out the vast majority of impurities in the water.
Suitable scenarios for reverse osmosis
Suitable for households with poor water quality or those that require strict water quality standards, especially in areas where the water source contains a large amount of dissolved contaminants.
If you have very high water quality requirements or a family member who is particularly sensitive to water quality, a reverse osmosis water purifier is undoubtedly a more ideal choice.

How to choose the right water purifier?
After understanding the technical differences between ultrafiltration, nanofiltration, and reverse osmosis, how can you choose a water purifier based on your needs?

Water quality: First, you need to understand the water quality in your area. If the water quality is poor and contains more harmful substances, reverse osmosis technology is undoubtedly the best choice. For areas with relatively good water quality, ultrafiltration and nanofiltration water purifiers are already sufficient.

Budget and maintenance: Reverse osmosis water purifiers are generally more expensive, and the cost of replacing and maintaining the filters is also relatively high. For users with a limited budget or those who do not want to replace filters frequently, ultrafiltration or nanofiltration water purifiers may be a more economical option.

Taste and mineral retention: Some users have special requirements for the taste of water and its mineral content. Ultrafiltration and nanofiltration water purifiers perform better in retaining some minerals in the water. If you prefer fresh-tasting water and do not want to completely remove minerals from it, ultrafiltration and nanofiltration may be more suitable.

Hangzhou Haina Environmental Protection Technology Co., Ltd. Water Purifier Recommendation
If you are feeling confused when choosing a water purifier, the water purification products of Hangzhou Haina Environmental Protection Technology Co., Ltd. can serve as a reference. Our series of water purifiers covers ultrafiltration, nanofiltration, and reverse osmosis technologies, providing water purification solutions to meet different household needs.

29/07/2025

25/07/2025

IFAT Brasil 2025，June25th-27th, Our Booth Number D21c,Looking forward to meeting you.
IFAT Brasil 2025, de 25 a 27 de junho, nosso estande número D21c, estamos ansiosos para conhecê-lo.
IFAT Brasil 2025, del 25 al 27 de junio, nuestro stand número D21c, esperamos conocerte.

IFAT Brasil 2025, du 25 au 27 juin, notre stand numéro D21c, au plaisir de vous rencontrer.

IFAT Brasil 2025، 25-27 يونيو، جناحنا رقم D21c، نتطلع إلى لقائكم.