Ceramic UF Membrane Used in Waterworks in Zhoushan
Ceramic UF membrane used in waterworks in Zhoushan, the effluent turbidity was reduced to 0.018 NTU, far superior to the 0.1 NTU of traditional processes. This case represents a significant technological leap in the field of drinking water treatment. It's not just about improving a few data points, but a comprehensive revolution from treatment concepts to effluent quality.
A revolutionary improvement in water quality standards
The limits of traditional processes (such as sand filtration): An effluent turbidity of 0.1 NTU is already the highest level achievable by a well-operated conventional process (coagulation-sedimentation-sand filtration), and it is easily affected by fluctuations in raw water quality and operator skill.
Breakthrough in ceramic membrane technology: Stably achieving “0.018 NTU”, this is not merely "lower," but rather entering a completely new level of water quality. This is equivalent to reducing turbidity by an order of magnitude, making the water appear almost absolutely clear.
Enhanced Microbial Safety: Turbidity acts as a protective shell for microorganisms and viruses. Reducing turbidity to below 0.1 NTU, especially to extremely low levels like 0.018 NTU, significantly improves the physical retention of Cryptosporidium and Giardia lamblia, viruses, and bacteria, resulting in a qualitative leap in drinking water biological safety.
Reduced Disinfection Byproducts: Clearer water means lower organic matter content, significantly reducing the risk of generating harmful disinfection byproducts such as trihalomethanes during subsequent chlorination.
Superior Sensory Quality: Clear and bright water greatly enhances the user experience and builds trust.
How did high-filling ceramic membranes achieve this breakthrough?
1. The Physical Barrier of "Absolute Filtration":
Ceramic membranes have precise and stable pore sizes.
This is a rigid physical sieving process that can 100% retain suspended particles, colloids, and microorganisms larger than its pore size, unaffected by water quality fluctuations, ensuring extremely stable effluent quality.
2.What does "high packing density" mean?
Higher filtration area/volume ratio: Within a limited water plant footprint, innovative modular designs (such as denser flow channels and thinner supports) maximize the membrane filtration area per unit volume. This results in water plants with stronger treatment capacity or smaller footprint, solving the problem of large footprint in traditional membrane systems.
System efficiency and economic benefits: High packing density directly improves water production efficiency and reduces investment and operating costs per unit of produced water.
The core advantages of ceramic materials:
Extreme Durability: Made from inorganic materials such as alumina and zirconium oxide, it is corrosion-resistant, high-temperature resistant, and has extremely high mechanical strength, with a service life of over 20 years, 3-5 times that of organic polymer membranes.
Extremely High Tolerance: It can withstand stronger chemical cleaning (high concentrations of acids and alkalis, oxidants), and has a stronger ability to handle complex raw water qualities (such as high algae, low turbidity and high color), with thorough flux recovery.
Stable Operation: It has strong hydrophilicity, high initial flux with slow decay, stable operating pressure, and relatively controllable energy consumption.
Industry significance and transformative value
1. A Paradigm Shift from "Treating Qualified Water" to "Producing High-Quality Water":
Traditional processes focus on meeting standards, while ceramic membrane technology sets internal control standards far exceeding national standards (<1 NTU), driving waterworks to upgrade from ensuring basic safety to providing high-quality drinking water, responding to the people's needs for a better life.
2. A Powerful Tool for Coping with Complex Water Sources:
As an island, Zhoushan may face challenges such as seasonal fluctuations in water quality, high algae blooms, and saltwater intrusion. Ceramic membrane technology is more adaptable to changes in raw water quality, stably producing high-quality water and ensuring water supply security.
3. Provides an Efficient Path for Upgrading and Retrofitting Old Water Plants:
Existing water plants can directly replace or deeply treat traditional sand filters using compact ceramic membrane ultrafiltration workshops, achieving a significant leap in water quality without substantial expansion.
4. Sets a New Industry Benchmark:
This case study provides a proven solution for upgrading and expanding water plants in China, particularly in sensitive water source areas such as the southeast coast, lakes, and reservoirs, ensuring stable achievement of extremely high standards. It serves as a strong demonstration and guiding example.