How to Choose Sulfonamide Wastewater Treatment Process Technology

Description: Sulfonamide wastewater is mostly generated in pharmaceutical factories and aquaculture, and this type of wastewater contains recalcitrant organic matter. If not treated properly, it will cause serious harm to the environment. The special adsorbent developed by Haipu, combined with adsorption technology, can effectively remove such organic compounds and achieve stable and compliant water adsorption.

At present, most of the sulfonamide wastewater in China is generated from chemical and pharmaceutical raw material factories and used for antibacterial processes in aquaculture. Sulfonamide wastewater is not easy to undergo biochemical treatment and can cause serious pollution to the environment when discharged. However, due to the lack of economically effective treatment methods, the discharged wastewater contains a large amount of sulfonamides that are difficult to remove, and the COD value and salt content far exceed the national wastewater discharge standards. Not only does it seriously pollute the ecological environment and endanger human health, but it also causes resource loss and waste, affecting the sustainable development of enterprises. Common processing techniques include the following:

(1) Physical and chemical processing

The simple physicochemical method mainly targets the large amount of acid containing wastewater discharged during the production process of sulfonamide. To control this pollution source, waste carbide slag is used as a neutralizing agent to neutralize acidic wastewater. Ca(OH)₂ in carbide slag reacts with sulfate ions (SO₄^2-) and chloride ions (Cl^-) in the wastewater to produce CaSO₄ and CaCl₂, respectively. The resulting sludge is filtered and dehydrated by a plate and frame press filter, and the dry sludge is outsourced for treatment.

The physical and chemical treatment of sulfonamide wastewater has a simple process and is easy to industrialize, but the treatment effect is poor and cannot stably meet the standards. It needs to be combined with other advanced processes for further treatment.

(2) Biological treatment

There are many types of sulfonamide drugs, and the by-products in the production process are complex, resulting in a large amount of sulfonamide wastewater with complex components and a large amount of antibacterial organic compounds. It has the characteristics of high organic concentration, high sulfur content, high ammonia nitrogen, and high pH value. When using traditional activated sludge treatment, it requires a large amount of dilution water and the effluent quality is difficult to meet the standards. Moreover, sulfonamides and their intermediates contained in sulfonamide wastewater are difficult to degrade and have certain toxicity to microorganisms, making it difficult to treat them using general biological methods. The sequencing batch reactor (SBR) has been developed around the world in recent years due to its unique advantages.

Compared with traditional aerobic biological treatment methods such as activated sludge or oxidation ditch, anaerobic biological treatment has the advantages of small footprint, low operating costs, recyclability of certain bioenergy, low residual sludge volume, and easy treatment and disposal. However, anaerobic reactors are sensitive to toxic substances, and their long start-up cycle and small water treatment capacity limit their application in large-scale sewage treatment projects.

(3) Haipu Special Adsorption Technology

Jiangsu Haipu Functional Materials Co., Ltd. is committed to the research and industrialization of high-performance adsorbents and catalysts. In 2018, it was approved as the Suzhou Adsorption and Catalytic Functional Nanomaterials Engineering Technology Research Center. Through years of independent research and development, it has achieved international leading levels in ion exchange technology and adsorption technology, nano inorganic material hybridization technology, etc., realizing the serialization of adsorption and catalytic products and successfully applying them in the fields of environmental protection and resource recycling.

Compared with other processing technologies, Haipu adsorption technology has the following advantages:

1. Efficiently remove organic and colored substances from wastewater to achieve water reuse;

2. Special adsorbent materials have high absorption capacity and high concentration ratio, low equipment investment, and low operating costs;

3. Automated control, easy operation, convenient maintenance, and long service life.

Currently, the options for treating sulfonamide wastewater are still limited. Through in-depth research, Jiangsu Haipu has found that its special adsorbent and supporting adsorption method not only solve the problem of sulfonamide wastewater treatment, but also reduce the cost of outsourcing wastewater treatment and adding new water, making it more economically valuable. Welcome to our free consultation.