The present work deals with treatment of industrial wastewater with hydrodynamic cavitation (HC) combined with advanced oxidation processes (AOPs) at a pilot plant operating scale of 70 L. Initially approach of only HC was studied with understanding into the effect of parameters like inlet pressure (range of 2-8 bar) and dilution factor (two cases as 1:1 and 1:3). Only HC was found to give minimal chemical oxygen demand (COD) removal within 180 min and the further focus of the study was to test efficiency of different oxidants in combination with HC. Oxidants used in treatment process are hydrogen peroxide (H₂O₂), Fenton, air and oxygen. Effect of H₂O₂ loading was analyzed with variation of loading in range of 5-15 g.L^-1 and maximum COD removal of 30 % was achieved at 15 g.L^-1 loading of H₂O₂. Keeping 15 g.L^-1 as the constant loading of H₂O₂, optimization of Fenton based treatment was performed with variation of Fe²⁺/ H₂O₂ molar ratio in range of 1:10-1:30. Maximum COD removal of 42 % was achieved at best molar ratio of 1:20. For the very first time, air and oxygen injection were tested in combination of HC giving 15.5 % and 42 % COD removal respectively. Combination study of oxygen +Fenton+ HC was performed at H₂O₂ loading of 15 g.L^-1 and Fenton molar ratio as 1:20, which resulted in 63 % COD removal within 180 min of treatment. Energy efficiency and cost calculations were also performed and for process giving 63 % COD removal in 180 min, cost of treatment obtained was 398 US$/m³. It was clearly established that HC in combination of Fenton and oxygen is the best approach for treatment of complex industrial wastewater.

目前的工作涉及在70 L的中试工厂规模下，通过水力空化（HC）结合先进的氧化工艺（AOP）处理工业废水。最初，仅通过研究HC的方法，是通过了解入口压力等参数的影响来进行研究的（范围为2-8 bar）和稀释系数（两种情况分别为1：1和1：3）。在180分钟内，仅发现HC可使化学需氧量（COD）去除最小，该研究的进一步重点是测试与HC结合使用的不同氧化剂的效率。处理过程中使用的氧化剂是过氧化氢（H ₂ O ₂），芬顿，空气和氧气。分析了H ₂ O ₂负载的影响，负载在5-15 gL ^-1范围内变化在15 gL ^-1的H ₂ O ₂负载下，最大的COD去除率为30％。保持15 gL ^-1为H ₂ O ₂的恒定负载量，以Fe ²⁺ / H ₂ O ₂摩尔比在1：10-1：30范围内变化进行基于Fenton的处理的优化。在最佳摩尔比为1:20时，最大COD去除率为42％。第一次，空气和氧气的注入结合了HC进行了测试，分别去除了15.5％和42％的COD。在15 gL ^-1的H ₂ O ₂负荷下进行氧气+ Fenton + HC的组合研究Fenton摩尔比为1:20，在处理180分钟内可去除63％的COD。还进行了能源效率和成本计算，对于在180分钟内去除63％COD的过程，所获得的处理成本为398美元/ m ³。显然已经确定，将Fenton和氧气混合使用HC是处理复杂工业废水的最佳方法。