Nanofiltration System - Pressure Vessel Membrane Separation Equipment - Membrane Separation Technology - Compact Structure

Nanofiltration membranes are widely used in the removal of salts and organic matter from various types of wastewater. These membranes have a molecular weight cut-off of 200~1,000, operate at low pressure, exhibit ionic selectivity, possess high flux, and have strong anti-fouling capabilities. This article introduces the characteristics and separation mechanism of nanofiltration membranes, and reviews the research progress in the removal of organic pollutants in recent years, including drinking water, dyeing wastewater, landfill leachate, acrylic fiber wastewater, and the removal of benzene organic compounds and pharmaceutical organic compounds from wastewater.

When selecting the appropriate small-scale membrane experiment equipment, consider the following key factors:

Define the specific objectives of the experiment, such as separation efficiency, purity requirements, and processing capacity, as these will directly impact the choice of membrane material and equipment specifications.

Select an appropriate membrane type and material based on the characteristics of the material to be processed and the experimental requirements. For instance, for wastewater treatment containing high concentrations of organic substances, a membrane material resistant to organic solvents might be more suitable.

Small membrane experiment equipment should be easy to install, operate, and maintain. Choosing equipment with an automated control system and remote monitoring capabilities can significantly enhance experimental efficiency and safety.

Consider the purchase, operational, and long-term maintenance costs of the equipment to ensure the chosen unit fits within the budget while meeting experimental requirements.

Model and Specification:

Our series of equipment is available in dozens of specifications and models, categorized by different filtration accuracy and types of membrane tubes (ceramic membrane or ceramic membrane), catering to the varying needs of different customers, systems, technical requirements, and treatment volumes.

Nanofiltration system - Pressure-driven membrane separation equipment - Membrane separation technology - Compact structure

Process Description:

Pre-treatment: Pre-treat the raw water to enhance water quality, meet specifications, reduce and delay membrane fouling, and extend the service life. The primary targets are microorganisms, bacteria, colloids, organic matter, heavy metal ions, solid particles, and free chlorine in the water. Meets the immersion requirements of the nanofiltration system, ensuring long-term stable operation of the nanofiltration unit.

Composed of sand filters, carbon filters, scale inhibitor dosing units, and security filters.

Sand Filter: Removes mud, impurities, and suspended particles from water, reducing the raw water SDI (Scale Deposit Index) value.

Carbon Filter: Features dual action – adsorption and filtration. Removes chemical organic substances, heavy metals, color, odor, residual chlorine, etc., from tap water, improving its taste.

Security Filter: Equipped with a PPF filter core with an internal pore size of 5 micrometers, it screens out particles, colloids, microorganisms, and other impurities larger than 5 micrometers, thereby extending the lifespan of the membrane.

The catalyst shows high apparent concentration of organic matter, resulting in a higher reaction probability on-site, leading to faster and more complete degradation with a significant improvement in removal rates. It can catalyze the application of new electrolytic materials, removing high concentrations of organic matter, colorants, heavy metal ions, and waste water containing heterocyclic organic compounds.