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 aeration disc for coal chemical wastewater treatment

-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 aeration disc for coal chemical wastewater treatment

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.

Introduction:

The coal chemical process requires a large amount of production water, which is used for gas washing, condensation, and purification in gas generators. This process generates a large amount of wastewater, which contains high concentrations of pollutants and complex water components, mainly composed of phenolic compounds. It also contains a large amount of toxic and harmful substances such as long-chain alkanes, aromatic hydrocarbons, heterocyclic compounds, ammonia nitrogen, cyanide, etc. The water has poor biodegradability and strong microbial inhibition, making it a typical high concentration industrial wastewater that is difficult to biodegrade.

Wastewater sources

◆ Coking wastewater

Coal to coke refers to the process of making coke from coal through a series of physical and chemical changes under isolated air conditions at 1000 ℃. The tar obtained from coking contains hundreds of organic chemical raw materials such as benzene, naphthalene, anthracene, etc. The sources of coking wastewater include initial gas cooling, production water, and steam condensation. The residual ammonia water generated from coal dry distillation and gas cooling is the main source of coking wastewater, accounting for more than 50% of the total amount of coking wastewater, and the water quality is greatly affected by the raw coal and coking process.

Coal gasification wastewater

Coal gasification wastewater is mainly generated during the washing, condensation, and fractionation processes of coal gas, with coal gas washing wastewater being the main source. Coal gasification wastewater contains ammonia nitrogen, volatile phenols, SS, and various other cyclic organic compounds, making it a typical high concentration and difficult to degrade organic wastewater.

Coal to oil wastewater

The coal to oil process is a utilization technology that uses coal as raw material to process and produce oil products such as gasoline, diesel, and aviation kerosene. Coal to oil wastewater has the characteristics of high chromaticity, high degree of emulsification, complex composition of wastewater, and difficulty in biodegradation. Coal to oil wastewater contains a large amount of inorganic substances such as ammonia nitrogen, as well as toxic organic compounds including benzene derivatives and heterocyclic compounds containing nitrogen and sulfur.

Separation technology processing

The separation and treatment of organic wastewater from coal chemical wastewater is the process of separating certain pollutants from water without using excessive energy, without damaging the molecular structure of the pollutants. Some separation methods can achieve economic benefits, turning waste into treasure and reducing water treatment costs. Some separation methods can remove toxic and harmful substances from wastewater, thereby reducing the inhibition or toxicity of pollutants on microorganisms in biochemical treatment and enhancing the effectiveness of biological treatment.

Extraction method

The commonly used extraction methods in water treatment include liquid-liquid extraction and supercritical extraction. The extraction treatment of coal chemical wastewater mainly involves extracting high concentrations of phenols (1000-50000mg/L) from the production condensate. Hydrocarbons such as diesel and coal tar are often used as extractants, and then phenol oil is recovered by distillation to greatly reduce the phenol concentration in the water.

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◆ Adsorption method

Adsorption method is widely used in the pretreatment and deep treatment of coal chemical wastewater. Adsorption method can effectively remove difficult to biodegrade dissolved organic matter and inorganic ions, while reducing CODcr, playing a role in color and odor removal, reducing subsequent biochemical treatment load, improving effluent quality, and achieving water recycling. The commonly used adsorbents include activated carbon, diatomaceous earth, fly ash, zeolite, slag, and synthetic resin. Currently, activated carbon is the most widely used.

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◆ Membrane separation method

Membrane separation method utilizes the different pore sizes and selective permeability of membranes to separate organic compounds with different characteristics from the main body of wastewater, achieving the goal of reducing their concentration in wastewater. Usually, the water treated by membranes can be reused, greatly improving the recycling efficiency. Membrane separation method is widely used in water treatment, such as coal chemical wastewater, pharmaceutical wastewater, petroleum industry wastewater, etc.

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◆ Coagulation precipitation method

Coagulants are widely used in the pretreatment of coal chemical wastewater. The commonly used coagulants currently include polymeric ferric sulfate, polymeric ferric aluminum chloride, and polyacrylamide. Under the conditions of using iron carbon Fenton coagulation precipitation method to pretreat coking wastewater, such as gold, CODcr、 The removal rates of volatile phenols reached 36.8% and 49.5% respectively, and the B/C ratio increased from 0.2 to 0.48, providing a guarantee for subsequent biochemical treatment.

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biological method

Biological methods have many advantages and are widely used in the secondary treatment of coal chemical wastewater. Through biological treatment, the concentration of organic matter in water can be greatly reduced, and most CODcr, BOD, and ammonia nitrogen can be removed. It is the core process for achieving standard discharge of coal chemical wastewater and a necessary process before deep treatment.

◆ Biological denitrification process

Due to the high nitrogen content in coal chemical wastewater, the use of biological denitrification technology has become an inevitable choice for secondary treatment of coal chemical wastewater. The core is to adjust the dissolved oxygen content in different stages of the pool, reasonably control the nitrification and denitrification processes, and remove organic matter. At present, anaerobic aerobic combined denitrification process is widely used, in addition to short-range nitrification denitrification and synchronous nitrification denitrification technologies.

◆ Oxidation/Reduction Method

The oxidation/reduction method, especially the oxidation method, has been widely used in water treatment. By using oxidation/reduction agents to promote changes in the chemical structure of pollutants in water, the toxicity of pollutants or their inhibition on organisms can be reduced, biodegradability can be improved, or color and other problems can be fundamentally solved.

Catalysts are usually needed to improve efficiency, such as pH regulation, biological enzymes, metal catalysts, etc. Chemical oxidation is a widely used water treatment method, generally used to treat wastewater that is difficult to degrade, toxic to microorganisms, and inhibitory, in order to improve biodegradability. By combining with biological methods, it can achieve good results. Chemical oxidation is often used to treat trace harmful substances in drinking water and biochemical effluent. The oxidation method has evolved into advanced oxidation methods during its development, which generate hydroxyl radicals and have a faster reaction rate.

Activated sludge process

The ordinary activated sludge method has poor ammonia nitrogen removal efficiency in the treatment of coal chemical wastewater. High ammonia nitrogen concentration in the water is prone to poisoning microorganisms, disrupting the normal growth environment of microorganisms, and has poor treatment effect on difficult to degrade organic matter. Therefore, it is difficult to meet the current requirements of water treatment. In order to compensate for the shortcomings, many process strengthening and improvement measures have been taken, such as increasing B/C and reducing water toxicity through oxidation pretreatment; Improve the tolerance of microorganisms through biological domestication measures; Improve aeration methods to increase dissolved oxygen concentration. Although it can improve the treatment effect, the removal efficiency of ammonia nitrogen is poor, and further combined denitrification processes are needed to meet emission standards.

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Dealing with difficulties

In recent years, there have been constantly new methods and technologies for treating coal chemical wastewater, but each has its own advantages and disadvantages.

The pure biological oxidation method produces water containing a certain amount of recalcitrant organic matter, with a high COD value, which cannot meet the emission standards.

Although adsorption can effectively remove CODcr, there are issues with adsorbent regeneration and secondary pollution.

Although catalytic oxidation can degrade organic compounds that are difficult to biodegrade, there are problems such as high operating costs in practical industrial applications.

The anaerobic aerobic combined treatment of coal chemical wastewater can achieve ideal treatment results, with relatively low operational management and cost. This process is the main choice for coal chemical wastewater treatment. But when the incoming water concentration is high and contains a lot of difficult to degrade organic matter, the effluent is difficult to stably meet the standard, and it needs to be used in conjunction with processes such as catalytic oxidation and coagulation precipitation.

Future Development Trends

Develop catalysts for advanced oxidation technology with high performance and low cost, promote the industrial application of this technology, and effectively alleviate the toxic inhibitory effect of coal chemical wastewater on biological processes.

Develop efficient biological denitrification technology to achieve efficient removal of total nitrogen in coal chemical wastewater under low carbon to nitrogen ratio water quality conditions, meeting the inlet requirements of subsequent membrane treatment processes.

Combining the advantages of various treatment technologies to form efficient, stable, and low-cost combined treatment processes is an effective way to promote the achievement of coal chemical wastewater goals.