Application of Near-Zero Discharge Process for PVA Chemical Wastewater Treatment
Given the challenges in treating refractory polyvinyl alcohol (PVA) wastewater such as large volume,high concentration,high salt content,and complex composition,we propose a combined technology integrating biochemical method,near-zero discharge,and resource utilization for the comprehensive wastewater treatment in PVA chemical production enterprises.This approach aims to achieve near-zero discharge by efficiently removing organic matters and nutrients from wastewater through microbial processes and separating and recycling salt components.The results show that this method not only achieves the near-zero discharge goal,saves a tremendous amount of water resources and reduces pollutant discharge,but also increases investment returns for enterprises,thus exhibiting significant environmental benefits and promising application prospects.This study introduces the selection of process routes and process details to provide reference for the design of zero-discharge processes for chemical wastewater in the same industry.
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