Department of Environmental Engineering, Kocaeli University, Izmit 41380, Kocaeli, Turkey.
Department of Environmental Engineering, Gebze Technical University, 41400, Gebze, Turkey; Department of Environmental Engineering, Bursa Technical University, 16310, Bursa, Turkey.
Chemosphere. 2022 Nov;306:135539. doi: 10.1016/j.chemosphere.2022.135539. Epub 2022 Jun 29.
Printing and packaging process wastewater (PPPW) with high flow rates causes severe damage to the environment due to high organic pollution (3830.0 mg O/L of COD and 813.6 mg/L of TOC) and turbidity (9110 NTU). This study examined the efficiencies of coagulation, Fenton, and photo-Fenton procedures, and their combinations in the treatment of PPPW. The three inorganic salts (FeCl, Al(SO), and Fe(SO)) were used in a wide range of pH (2.5-10) as a coagulant, and FeCl was chosen as the optimum coagulant. The 71.3% of TOC removal and the decreasing of turbidity up to 5.8 NTU were obtained at 0.5 g/L FeCl and pH of 6.0. Then, Fenton and photo-Fenton processes were applied to the effluent of the coagulation process. The Fenton process engaged the TOC removal efficiencies up to 85.2% in the presence of 7.350 g/L iron catalysts and 36.0 mL/L HO. The combined coagulation and Fenton process is a promising way to decrease the COD up to 119 mg O/L, meeting the wastewater discharge standards of COD (200 mg O/L) in Turkey. However, adding UV sources to the Fenton process showed a little bit of engagement (only %1.4 extra removal). When evaluated for PPPW, it is seen that the usage of combined coagulation and the Fenton process is an important treatment alternative. Furthermore, Zeta potential measurements and size exclusion chromatography were used to understand the removal mechanism.
印刷和包装工艺废水（PPPW）流量大，由于高有机物污染（COD 为 3830.0mg/L，TOC 为 813.6mg/L）和高浊度（9110NTU），对环境造成严重破坏。本研究考察了混凝、芬顿和光芬顿工艺及其组合在 PPPW 处理中的效率。三种无机盐（FeCl、Al(SO) 和 Fe(SO))在很宽的 pH 范围内（2.5-10）用作混凝剂，FeCl 被选为最佳混凝剂。在 0.5g/LFeCl 和 pH 为 6.0 的条件下，TOC 的去除率为 71.3%，浊度降低至 5.8NTU。然后，将芬顿和光芬顿工艺应用于混凝工艺的出水。在 7.350g/L 铁催化剂和 36.0mL/L HO 的存在下，芬顿工艺的 TOC 去除效率高达 85.2%。混凝和芬顿联合工艺是一种很有前途的方法，可以将 COD 降低到 119mgO/L，达到土耳其废水排放 COD（200mgO/L）标准。然而，向芬顿工艺中添加 UV 源仅显示出略有增加（仅额外去除 1.4%）。当对 PPPW 进行评估时，发现联合使用混凝和芬顿工艺是一种重要的处理替代方法。此外，还使用了动电位测量和尺寸排阻色谱来理解去除机制。
