How to deal with harmful substances in papermaking wastewater-Ocpuritech-img

How to deal with harmful substances in papermaking wastewater?

by:Ocpuritech     2021-03-16
How to deal with harmful substances in papermaking wastewater? Author: paper production process, including pulping, bleaching, washing and paper, the main pollutant to pulp wastewater. Due to the differences in papermaking types, sources, treatment processes, and technical equipment, the characteristics of wastewater discharged by different companies are very different. If harmful substances are directly discharged without treatment, they will have a great impact on the surrounding environment. How to deal with harmful substances in papermaking wastewater? 1. Coagulation method: Coagulation method is generally used. That is, the coagulant is used to treat the papermaking wastewater so that the effluent quality can reach the first-level standard of the papermaking industry's water pollutant discharge standard. There are many types of coagulants, relatively small investment, and high cost performance. 2. Air flotation: Air flotation refers to the recycling of waste paper pulp in papermaking wastewater, mainly to treat intermediate wastewater. Through the independence of the papermaking wastewater treatment device, the effluent quality can reach the second level of the papermaking wastewater discharge standard. The air flotation device has high technical content, strong applicability, simple operation and relatively low operating cost. 3. Membrane separation method: This is a chemical change to realize the treatment of wastewater in the refractory organic papermaking industry. Taking into account the characteristics of wastewater quality, the application effect is very obvious under certain conditions. 4. Adsorption method: This is a relatively simple papermaking wastewater treatment method, and it is also a relatively basic method, that is, powdered activated carbon is used as an adsorbent to make the effluent standard meet the national industrial sewage discharge standard.
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