How to reduce the problem of wastewater pollution in the production of chlorohydrins?

How to reduce the problem of wastewater pollution in the production of chlorohydrins?

Chlorohydrin production is one of the important production processes of propylene oxide, but because of its production process will produce a large amount of waste water containing toxic and harmful substances, the problem of waste water pollution has been an urgent problem in the industry. In order to achieve the goal of sustainable development, enterprises must take effective measures to reduce the pollution of wastewater in the production of chlorohydrin and reduce the impact on the environment.

1. situation of waste water pollution in chlorohydrin production

In the production process of chlorohydrin method, wastewater mainly comes from raw material mixing, reaction post-treatment and equipment cleaning. These wastewaters usually contain high concentrations of organic pollutants, such as phenolic compounds, chlorinated hydrocarbons, etc. These toxic and harmful substances not only cause serious harm to aquatic ecosystems, but also pose a threat to human health through the food chain.

The treatment of wastewater from chlorohydrin process is difficult. Due to the complex structure and strong stability of organic matter in wastewater, the traditional physical and chemical treatment and biological treatment methods are often difficult to completely degrade these pollutants, resulting in high residual pollutants in the treated wastewater, which is difficult to meet the discharge standards.

2. reduce wastewater pollution treatment technology challenges

1. optimization of production process Reducing the generation of wastewater pollutants from the source is the key to reducing wastewater pollution. By optimizing the production process of chlorohydrin, the occurrence of side reactions can be reduced, thereby reducing the concentration of pollutants in wastewater. For example, by adjusting the reaction conditions (e. g., temperature, pressure, catalyst type, etc.) and optimizing the reaction process, the selectivity of the reaction can be improved and the generation of unnecessary by-products can be reduced.

2. Improved end treatment technology For the wastewater that has been generated, enterprises need to adopt efficient end treatment technology for treatment. At present, the commonly used treatment methods include physical and chemical methods (such as extraction, adsorption, ion exchange, etc.) and biological treatment methods (such as aerobic fermentation, anaerobic fermentation, etc.). Due to the high toxicity and high stability of the pollutants in the chlorohydrin wastewater, the traditional treatment technology has some limitations in the treatment efficiency and cost. Therefore, the development of new and efficient wastewater treatment technology is particularly important.

3. waste water resource utilization The resource utilization of wastewater can not only reduce pollutant emissions, but also create additional economic benefits for enterprises. For example, the recovery of valuable substances (such as phenolic compounds and chlorinated hydrocarbons) in wastewater through distillation, distillation and other technologies can not only reduce the concentration of pollutants in wastewater, but also reuse these substances in the production process to realize the recycling of resources.

3. Resource Utilization Technology Path

1. distillation recovery technology The separation and recovery of phenolic compounds in wastewater by distillation technology can effectively reduce the concentration of pollutants in wastewater. Distillation technology has the advantages of high separation efficiency and simple operation, but energy consumption and equipment investment need to be considered.

2. membrane separation technology Membrane separation technology (such as reverse osmosis, nanofiltration, etc.) can effectively separate pollutants in wastewater. Compared with the traditional evaporative concentration technology, membrane separation technology has the advantages of low energy consumption and flexible operation, and is suitable for the treatment of high concentration wastewater.

3. biological treatment technology For organic pollutants in wastewater that are difficult to treat by physical and chemical methods, they can be degraded by biological treatment technology. For example, efficient bacteria are used to degrade organic matter in wastewater, thereby reducing the concentration of pollutants. Biological treatment technology can also be combined with other treatment methods to form a more efficient treatment process.

4. summary and prospect

The problem of wastewater pollution in chlorohydrin production is a complex environmental problem, which needs to be comprehensively considered from the aspects of production process optimization, terminal treatment technology and resource utilization. By optimizing the production process, the generation of pollutants can be reduced from the source; by improving the end treatment technology, the efficiency of wastewater treatment can be improved; through the resource utilization of wastewater, the reduction of pollutants and the recycling of resources can be realized.

In the future, with the continuous strengthening of environmental protection policies and the continuous progress of environmental protection technology, the problem of wastewater pollution in the production of chlorohydrin is expected to be effectively solved. Enterprises should actively invest in technology research and development, explore more efficient and economical processing methods, and contribute to the realization of green chemical industry and sustainable development.