Defluorination technology for drinking water and industrial water treatment

Applicating Company

Rinland  Environment  Tech (Beijing) Co. , Ltd.

Technology Name

Defluorination technology for drinking water and industrial water treatment

Technical principle

1. Drinking water defluoridation and adsorption method:

High fluorine water and modified hydroxyapatite fluoride filter media contact, the surface of the filter media adsorption and filtration and ion exchange dual reaction, the water fluoride ions adsorbed on the filter media and fluoride ions and filter media surface OH- ion exchange, through the dual effect of the physical and chemical reaction to achieve the purpose of fluoride removal.

2. Principle of membrane fluoride removal:

The company has developed the FluoRid Pro series of low-energy selective reverse osmosis membrane modules RL-F-8040ES for defluoridation of groundwater and a complete set of fluoridation process technologies.

RL-F-8040ES membrane modules are made of specially treated negatively charged selective reverse osmosis membrane , which can retain up to 98% or more of fluoride ions under specific process conditions.The actual average fluoride removal rate can be stabilized over 93%.

3. Combined method of fluoride removal process:

Use the special fluoride removal agent developed by the company react with the fluoride ions in water， forming flocs and producing precipitation.Application of different filtration methods, including membranes, to separate solids from liquids, resulting in stable fluoride removal.Application of different filtration methods, including membranes, to separate solids from liquids, resulting in stable fluoride removal. 

Scope of application

1. The fluoride removal equipment with modified hydroxyapatite fluoride filter media as filler has good fluoride removal effect and low treatment cost, which is  suitable for the construction needs of the current rural drinking water safety project, and also suitable for the treatment of extracting fluorine elements from water.

2. Low energy consumption membrane fluoride removal can achieve more than 90% fluoride removal, and can also remove other inorganic pollutants in water.Compared with the traditional reverse osmosis membrane method, Rinland's low energy consumption membrane fluoride removal technology overcomes the problem of high energy consumption in the operation of traditional membrane treatment.With easy installation, use, operation and maintenance, stable operation, energy saving, environmental protection and high degree of automation, it is very suitable for urban waterworks and rural medium and large waterworks, and is a proven way to ensure drinking water safety.

3. The combined fluoride removal process is suitable for the fluoride removal needs of existing conventional treatment systems, and can accomplish the fluoride removal treatment goals without changing the original treatment process or adding new equipment, which is more suitable for the fluoride removal treatment needs of different industrial wastewater.

Process flow and description

1. Control system - Multi-media filter - Defluorination filter - Fine filter (optional) - Clear water tank

2. Multi-media filter - Iron and manganese media filter - Fine filtration filter - Membrane treatment system - Clear water tank - Water supply pipe network

3. Pre-treatment grille - Defluoridation agent dosing - Flocculation tank - Sedimentation tank - Filtration system - Clear water tank (or direct discharge)

Promotion prospects

The company has developed three generations of core fluoride removal process, which provides a strong technical support to solve the world-class problem of drinking water fluoride removal, and also to solve the problem of industrial wastewater fluoride removal, with a broad application prospect in the fields of microelectronics, chips, photovoltaics, lithium, flat panel display, glass manufacturing, non-ferrous metallurgy, iron and steel, fluorine chemical, mine water treatment, etc.