Germany is good. As early as 1948, Ruihao Company was established in Rehau, Bavaria, Germany, and began research and production mainly based on polymers. Its products cover many fields such as environmental protection, municipal, construction, industry, medical, furniture, aviation, etc. In the field of environmental protection, German Ruihao Company is one of the foreign brands entering the Chinese market. Since 2003, Ruihao aeration products have been proven to have excellent application effects in municipal, petrochemical, printing and dyeing, food, coking and other fields. Ruihao Micro porous Aerator is becoming an increasingly popular brand among users due to its durability, safety, and energy-saving performance.

Product Introduction
The RAUBIOXON PLUS aeration disc is specially developed by Ruihao to provide microbubbles for sewage biological treatment processes. -Silicone rubber film has stable physical and chemical properties

German Ruihao Silicone Aeration Disk for Electronic Wastewater

-Long economic service life

-Uniform and flexible arrangement of aeration discs

-Small pressure loss, significant energy saving

-Can be used for sewage treatment plants that operate continuously or intermittently

-Suitable for municipal or industrial wastewater

Product advantages
The RAUBIOXON PLUS aeration disc adopts a specially developed silicone rubber membrane by Ruihao, which has the following advantages:

-Corrosion resistance and aging resistance, stable operation

-No plasticizers, can maintain the elasticity of the film for a long time

-Anti grease

In addition, the saddle seat connection method developed by Ruihao can save installation time by 80%.

Scope of application
The product can be used in the following wastewater:

-Municipal sewage

-Petrochemical wastewater

-Steel coking wastewater

-Leather wastewater

-Papermaking wastewater

-Textile printing and dyeing wastewater

-Food wastewater

-Beverage wastewater

-Pharmaceutical wastewater

-Printing wastewater

-Garbage leachate

-Chemical wastewater

Note: The applicability of the product is determined through testing under the same water quality conditions.

For special usage environments, please consult with Ruihao engineers

Scope of supply

Product Manual

—RAUBIOXON PLUS DISC 260

one. Product Introduction

1. Introduction

The RAUBIOXON PLUS DISC 260 aeration system consists of silicone rubber membranes, support disks, snap rings, saddle connections, and other components. When oxygenation and aeration are carried out, compressed air diffuses into the water through the microporous gas layer to achieve the purpose of oxygenation and aeration.

German Ruihao Silicone Aeration Disk for Electronic Wastewater

2. Performance

The RAUBIOXON PLUS DISC silicone rubber membrane microporous disc aerator is made of corrosion-resistant and anti-aging materials:

-Aeration membrane: Silicone membrane

-Support disk:PPpolypropylene

2.1 Characteristics of Silicone Membrane:

a. Advantages of silicone film

-High elasticity

-Not easily brittle

-Low affinity with sediment

-Oil resistance

-Not easily hardened

-Non biodegradable

-High resistance to chemical corrosion

-Save energy consumption

-Recyclable

b. Performance parameters of silicone rubber film

c. Performance parameters of the support disk

2.2 Advantages of Silicone Rubber Aeration Disk

-Silicone membrane is corrosion resistant and aging resistant, with long service life and stable operation

-The flexible point system design ensures that the micropores on the membrane automatically close when the gas supply is stopped, preventing wastewater from entering the tray

-Perforation will not block, suitable for both continuous operation and intermittent operation

-Good aeration characteristics, high oxygen utilization rate and power efficiency

-The volume of bubbles, uniform distribution of bubbles

-Quick and easy installation method, saving a lot of accessories

-After passing through the aeration disc, the average diameter of the bubbles1.0~2.0mm.

-Under normal usage conditions, maintain a high oxygen transfer rate during the service life.

-Use a condensate drainage device to remove the accumulated water in the air distribution pipe.

two.Aeration disk parameter table

three. Design and Structure

a. The aeration disc provided by our company can adapt to work under different sewage quality and temperature conditions, meet the needs of sewage biochemical treatment in the aerobic zone of the biochemical tank, effectively diffuse the air from the blower evenly into the water, and maintain stable oxygenation effect and efficiency for a long time. When the gas supply is stopped, the aeration hole can be effectively closed.

German Ruihao Aeration Plate

b. The microporous mode aeration disc meets the following requirements:

-Single disk outer diameter 270mm.

-The service life of the microporous mode aeration disc: not less than5Year (municipal wastewater).

c. The microporous aeration disc is disc-shaped and attached with a silicone rubber membranePPOn the support plate made of high-strength materialPPMaterial fixing ring fixation.

d. The rubber film is made of German imported silicone rubber material. The membrane is made using injection molding technology; The membrane punching is mechanical punching, with square holes perpendicular to the membrane pattern.

e. The air entering the aeration disc must be purified to meet the requirements of long-term continuous use or disuse before being put back into use, without causing blockage of micropores and backflow of mixed liquid.

f. The connection between the aeration disc and the air distribution pipe adopts a saddle interface, which does not require additional bolt fastening, avoiding the possibility of detachment during operation caused by different tightening forces of double bolts and saving installation time.

g. The surfaces of each component on the microporous aeration disc are clean and smooth, without scratches, bubbles, pores, inclusions, spots, wrinkles, or sharp edges.

h. The aeration disc provided by our company is resistant to corrosion from urban sewage, high temperature, and acid and alkali.

four. Installation and debugging

The company will provide professional personnel to guide installation and debugging to ensure the quality of installation.

Before installation, it is necessary to check the dimensions of the civil structures.

Test the equipment after installation to ensure quality.

Ruihao Environmental Technology.Ruihao Environmental Technology (Taicang) Co., Ltd. is a wholly-owned subsidiary of German Ruihao Company established in China. It is a professional comprehensive supplier of aeration system solutions that integrates aerator design, production, warehousing, logistics, installation, commissioning, training, and after-sales service. For many years, Ruihao Environmental Technology has been committed to providing customized aerobic biological treatment aeration technology solutions for municipal sewage treatment and industrial wastewater treatment. We always focus on close cooperation with our customers and provide comprehensive solutions for the construction of new water plants, upgrading and maintenance of existing water plants. We have successfully achieved our goals in 500 sewage treatment plants in China.

Taicang Factory.In order to provide timely and effective services to China, Southeast Asia, and various countries in Australia, German Ruihao Company invested 200 million yuan in 2008 to establish a factory in Taicang, Jiangsu, China, fundamentally solving the problem of long supply times. At the same time, as the factory in China is a wholly-owned subsidiary of Germany's Ruihao, its raw material supply and production equipment are all from Germany, and the production process, inspection standards, personnel management, and even logistics and distribution all strictly comply with Germany's Ruihao's requirements. It not only maintains the quality of finished products, but also meets the needs of project progress in terms of supply time. Today's Ruihao has not only become a leader in product quality, but also driven the development of the aeration industry in various aspects such as design, research and development, and service.

Electronic wastewater mainly refers to the wastewater generated in each link of printed circuit boards, such as copper plated circuits, electronic components, diodes, transistors, capacitors, etc. Common in daily life are computer components, such as memory modules CPU、 Motherboard, etc. These things are mainly achieved through electroplating technology in the production and molding process, and electroplating itself is a relatively complex process. Through the movement of charges, copper ions, nickel ions, etc. are formed in the form of elemental substances to form coatings according to requirements.

A large amount of water is used to wash impurities from the front-end pretreatment process and the cleaning of molded products. Unlike electroplating processes such as frames and guardrails, the electronics industry has much higher precision requirements. In terms of washing water, the purity of the water is also relatively high, and pure tap water cannot meet the requirements, so water purification is needed.

However, the composition of the tank solution is complex throughout the entire production process. Although the water quality is relatively pure, heavy metals such as copper, nickel, and chromium, acidic substances such as sulfuric acid, hydrochloric acid, and nitric acid, as well as surfactants, brighteners, chelating agents, and other substances are introduced into the water during the cleaning process, making the water quality more complex.

The heavy metal ions in this type of wastewater have the characteristics of long toxicity, non biodegradability, and can accumulate in organisms, causing dysfunction and serious harm to the ecological environment and human health.

Semiconductors are materials with conductivity between conductors and insulators at room temperature, often used in the production of electronic components. The production wastewater mainly comes from the corrosion section of the semiconductor production process, such as the copper wire on the circuit board, which is etched after the copper foil paper on the circuit board is coated with copper. Due to the use of a large amount of hydrofluoric acid, ammonium fluoride and other reagents, the concentration of pollutants such as fluorine and ammonia is high, and the wastewater is generally strongly acidic.

The main pollutants in its organic wastewater are conventional pollutants, and the production concentration is closely related to the production process and operational management level, with COD generally ranging from 200 to 3000 mg/L. There are many types of metal ions in semiconductor production wastewater, mainly including copper, nickel, chromium, tin, lead, silver, etc., with concentrations generally ranging from tens to hundreds of mg/L.

Wastewater treatment process in the electronics industry

The wastewater generated in the electronic semiconductor industry is often treated using processes such as reduction precipitation, oxidation cyanide decomposition, chemical precipitation, neutralization, and chemical air flotation.

A typical method for treating electroplating wastewater is to use the reduction precipitation method to treat chromium wastewater. FeSO3, NaHSO3, Na2SO3, SO2 or iron powder are added to the wastewater to reduce Cr to Cr, and then NaOH or lime milk is added for precipitation separation.

The advantages of this process are simple equipment, low investment, and large processing capacity, but it is necessary to prevent secondary pollution caused by sediment and sludge.

Oxidative chemical treatment is commonly used for cyanide containing wastewater, such as alkaline oxidation, peroxide method, hydrolysis method, ozone treatment method, electrochemical oxidation method, etc.

Chemical precipitation method is commonly used to treat heavy metal ions in wastewater. Chemicals (NaOH, lime, etc.) are added to the wastewater to allow the heavy metal ions in the water to react with the hydroxide ions of the alkali to form insoluble hydroxides. Then, the hydroxides and water are separated to achieve the goal of removing heavy metal ions.

The advantage of chemical precipitation method is that it has good treatment effect, and the treated wastewater can be reused for production. At the same time, it can recover chromic acid and regenerate barium carbonate. However, further solutions are needed to address the sources of barium salts, separation of sediment, and secondary pollution of sludge.

Chemical precipitation treatment of fluorine-containing wastewater involves adding lime milk to the wastewater to form CaF2 precipitate between fluoride ions and calcium ions for removal. However, this method is difficult to meet the effluent standards after treatment, with slow settling of sludge and difficulty in dewatering.

Neutralization method is mainly used to treat acid or alkali washing wastewater in electroplating plants. Commonly used methods include natural neutralization, chemical neutralization, filtration neutralization, and drum neutralization. In addition, using carbide slag as a neutralizing agent to treat acid wastewater also has a good effect, and can achieve the goal of "treating waste with waste".

The principle of chemical air flotation is to use a large number of microbubbles released by the sudden pressure reduction of the working water in a pressure vessel, which adhere to the condensed matter generated after mixing with chemicals, so that their specific gravity is lower than that of water and float to the surface of the water as floating slag, thereby purifying the wastewater.

Application of ion exchange resin method in electronic semiconductor wastewater

Ion exchange resin is a functional group, network structure, insoluble polymer compound with the ability to exchange ions, including an insoluble three-dimensional network skeleton, functional groups connected to the skeleton, and exchange ion unit structures carried by functional groups.

The ion exchange resin method uses ion exchange resin to exchange heavy metal ions, reduce the concentration of heavy metals, and remove metal ions from wastewater. After the ion exchange resin is saturated with adsorption, it can be regenerated by exchanging the ions on the ion exchange resin, restoring its exchange capacity, and recovering the detached metal ions for concentration and recycling.

The ion exchange resin method is a highly promising wastewater treatment method, which is widely used in wastewater treatment due to its simple operation, short overall process, small footprint, mature process technology, and other advantages. It has good treatment effects on different types of wastewater and can effectively utilize wastewater resources.

Ion exchange resin can treat heavy metals, remove fluoride ions from water, and acidic or alkaline substances in organic wastewater. Like Tulsimer ® CH-87 、Tulsimer ® CH-90, etc.

Advanced treatment technology for fluorine-containing wastewater using ion exchange resin

Tulsimer ® CH-87 is a special gel type selective ion exchange resin for removing fluoride ions from aqueous solutions. It has a cross-linked polystyrene copolymer structure with fluoride selective functional groups, has strong selectivity to fluoride, and can withstand the interference of chloride ions, sulfate ions, bicarbonate and other anions.

Its ability to remove fluoride ions can reach a level below 1ppm, with work efficiency in the neutral to alkaline pH range, and is easy to regenerate. CH-87 can be regenerated using aluminum chloride or aluminum sulfate.

Deep treatment technology for heavy metal wastewater using ion exchange resin

Tulsimer ® CH-90 is a highly durable macroporous selective chelating ion exchange resin with iminodiacetic acid functional groups, particularly suitable for the removal of heavy cations. Its macroporous resin structure ensures ion diffusion, providing efficient removal and regeneration performance. CH-90 resin can remove metals from water with lower pH, which can effectively control and reduce cost-effectiveness.

Adjust the pH to an appropriate range to remove metals, and keep it below 6 to prevent the formation of metal oxides and hydroxides precipitation.

At the same time, CH-90 has specific selectivity for removing copper and nickel, especially in the treatment of nickel ions and complex nickel (citric acid, acetic acid, malic acid, tartaric acid, succinic acid, hydroxyacetic acid, as well as zinc nickel alloys, nickel ammonium complexes, etc.), with strong binding effects and application advantages, suitable for direct adsorption of nickel in acidic environments (pH around 3). For strongly complexed nickel, it is necessary to first break the complex and then remove the nickel (such as EDTA nickel), with a saturated adsorption capacity of approximately 50g/l.