Experimantal Study On Scwo For Treatment Of Cultivation Wastewater

Livestock pollution has become the third largest source of pollution after life and industrial pollution sources, it also has become a major source of rural non-point source pollution. Livestock wastewater Without treated contains large amounts of organic pollutants, suspended solids, N, P element and other excess nutrients, the pollution load is high, resulting in eutrophication, it also will lead to sensitive aquatic organisms of organic contaminants gradually died; it also makes the concentration of groundwater nitrate or nitrite increased, the content of dissolved oxygen decreased, at the same time, it also makes the toxic ingredients of the water body increased, resulting in deterioration of water quality; it also causes clogged pores of the soil, causing the permeability and permeability of soil decreased、compaction and salinization, affecting soil quality seriously; We can see that the proportion of pollution of livestock farms is gradually increasing, it is imminent to the treatment of aquaculture wastewater How fastly and efficiently process the aquaculture wastewater has become the focus of attention of many researchers.The experimental research on the treatment of aquaculture wastewater in a farm in Taiyuan City, using a self-made continuous supercritical water oxidation equipment to test, the main focus on monitoring for the main pollution index COD in the aquaculture wastewater, and respectively by H2O2,KMnO4, NaC1O, kBrO3as oxidant, CuSO4as catalyst, inperoxide ratio in the range of1.5-3, the pressure in the range of24-28MPa, temperature in the range of420-500degrees, residence time in the range of20-60seconds, compare the treatment effect of oxidant, oxygen quantity, temperature, pressure and residence time on the organic waste in the aquaculture wastewater. The experimental data show that, the increase of temperature, pressure increased, oxygen quantity increased and prolonged residence time, all can improve the degree of degradation of organic pollutants in the aquaculture wastewater.The experiment through to four kind of oxidant experiment, show that the effect of treatment of H2O2is most obvious, and no other impurity elements, greatly reducing the following test difficulty, therefore, H2O2as the best oxidant. The data of orthogonal experiment results show that:with H2O2as oxidant, taking COD index as the representative, the factors influencing the effect of wastewater treatment from big to small are:temperature, pressure, residence time, oxygen quantity.And the experiment according to the exponential model establish the dynamic equation of supercritical water oxidation reaction, as the data support for people who continue to study the technology of supercritical water oxidation.