Institute of Resources and Environment, Beijing Academy of Science and Technology, Beijing, 100089, PR China; Key Laboratory of Energy-Water Conservation and Wastewater Resources Recovery, China National Light Industry, Beijing, 100089, PR China; The National Engineering Laboratory of Circular Economy (Industrial Wastewater Utilization and Industrial Water Conservation), Beijing, 100089, China.
Institute of Resources and Environment, Beijing Academy of Science and Technology, Beijing, 100089, PR China; Key Laboratory of Energy-Water Conservation and Wastewater Resources Recovery, China National Light Industry, Beijing, 100089, PR China; The National Engineering Laboratory of Circular Economy (Industrial Wastewater Utilization and Industrial Water Conservation), Beijing, 100089, China.
Chemosphere. 2023 Jan;311(Pt 1):136971. doi: 10.1016/j.chemosphere.2022.136971. Epub 2022 Oct 26.
In this work, heterogeneous catalytic ozonation for the treatment of bio-treated saccharin sodium production wastewater (BSSW) was comprehensively investigated with pilot- and full-scale systems, with special emphasis on the effects of Cu in the original wastewater on catalyst activity. The results of semi-batch and continuous experiments show that heterogeneous catalytic ozonation was effective in removing organic compounds from high-salinity wastewater and that Cu in the original wastewater had a substantial effect on the performance of the process. The retention of 0.15 mM Cu in BSSW increased the chemical oxygen demand (COD) removal by 31% in semi-batch reactor with heterogeneous catalytic ozonation. The stable COD removal efficiencies ranged from 74% to 66.4% for a 9-month operation, indicating that Cu with an appropriate concentration in the original BSSW not only improved the COD removal efficiencies but also inhibited catalyst deactivation; catalyst deactivation was mainly caused by the deposition of inorganic salts on the catalyst surface. Cu combined with some anions to inhibit the formation and deposition of inorganic salts that could easily cause deactivation. The deposited copper salts were readily eliminated, especially during backflushing operations. Moreover, in a full-scale study, heterogeneous catalytic ozonation with 0.15 mM Cu in BSSW exhibited stable COD removal efficiencies (51%-83%) after over 3 years of operation. This study offers a new idea for using the inherent properties of wastewater to perform advanced treatments on high-salinity industrial wastewater through heterogeneous catalytic ozonation.
在这项工作中，使用中试和全规模系统全面研究了用于处理经生物处理后的糖精钠生产废水（BSSW）的多相催化臭氧氧化技术，特别强调了原废水中铜对催化剂活性的影响。半分批和连续实验的结果表明，多相催化臭氧氧化技术可有效去除高盐废水中的有机化合物，原废水中的铜对该工艺的性能有重大影响。BSSW 中保留 0.15mM 的铜可使多相催化臭氧氧化半分批反应器中的化学需氧量（COD）去除率提高 31%。9 个月的运行期间，稳定的 COD 去除效率范围为 74%至 66.4%，这表明原 BSSW 中具有适当浓度的铜不仅提高了 COD 去除效率，而且抑制了催化剂失活；催化剂失活主要是由催化剂表面无机盐的沉积引起的。铜与一些阴离子结合，抑制了容易导致失活的无机盐的形成和沉积。沉积的铜盐很容易被去除，特别是在反冲洗操作期间。此外，在全规模研究中，BSSW 中含有 0.15mM 铜的多相催化臭氧氧化在超过 3 年的运行后表现出稳定的 COD 去除效率（51%-83%）。本研究为利用废水的固有特性通过多相催化臭氧氧化对高盐工业废水进行高级处理提供了新的思路。
