The purpose of this study is to determine the efficiency of photocatalytic​ reduction (UV/TiO₂) from Hexavalent Chrome to Trivalent Chrome using a solar parabolic cylindrical concentrator for a simulated effluent sample from the tanning processes. For this purpose, a model of the solar parabolic cylindrical reactor was used, which was considered the most suitable for the capture of radiation and for its mobilization. The independent variables of the simulated liquid effluent sample were pH, temperature (T), flow (Q), hexavalent chrome concentration and dependent variables were the efficiency of the results, solar radiation and titanium dioxide concentration [TiO₂]. The optimum processing values were: pH= 3.75; Q= 8.2; T= 30; [TiO₂]= 30g. The results of the simulated samples were decreasing from 0.183 mg/L to the values of the maximum permissible limits (MPL) of 0.4 mg/l. In the results carried out before the photocatalytic treatment of the actual tannery sample from the Rio Seco Industrial Park, 326.95 mg/L was obtained, the concentration of hexavalent chromium was 173.28 mg/L. After the photocatalytic treatment, 58.85 mg/L and 25.89 mg/L were obtained respectively, with a reduction of the efficiency from 3 to 1. It is feasible to perform the photocatalytic​ treatment using the Parabolic Cylinder Reactor on a semi-industrial scale for the reduction of Cr${}^{+6}$ to Cr${}^{+3}$. The research solves the current problems of the tanning companies in Arequipa. The optimal operation conditions are an exposure time of 4 h, between 10 am and 2.00 pm, with a radiation intensity of 875 W/m².

这项研究的目的是使用太阳能抛物线形圆柱浓缩器确定制革过程中的模拟废水样品，以确定从六价铬到三价铬的光催化还原（UV / TiO ₂）的效率。为此目的，使用了太阳能抛物线形圆柱反应堆的模型，该模型被认为最适合于捕获辐射及其动员。模拟出水样品的自变量为pH，温度（T），流量（Q），六价铬浓度，因变量为结果效率，太阳辐射和二氧化钛浓度[TiO ₂ ]。最佳处理值为：pH = 3.75；Q = 8.2；T = 30；[TiO ₂] = 30克。模拟样品的结果从0.183 mg / L降至最大允许限值（MPL）0.4 mg / l。在对来自里约塞科工业园的实际制革厂样品进行光催化处理之前进行的结果中，得到326.95 mg / L，六价铬的浓度为173.28 mg / L。光催化处理后，分别获得58.85 mg / L和25.89 mg / L，效率从3降低到1.使用抛物柱面反应器在半工业规模上进行光催化处理是可行的。铬的还原${}^{+6}$ 铬${}^{+3}$。该研究解决了阿雷基帕地区制革公司当前的问题。最佳操作条件是在上午10点至下午2.00点之间的4小时曝光时间，辐射强度为875 W / m ²。