Study On Treatment Of Lead 2,4, 6-trinitroresorcinate Wastewater Internal Electrolysis

Lead 2,4, 6--trinitroresorcinate wastewater contains large amounts of lead nitrophenols. Disappears after the sulfuric acid explodes processing,most of the lead has been removed, while the nitrophenol is to remain in solution. Conditions in the natural environment, wastewater containing nitro phenols color and high toxicity, low biodegradability, biodegradation rates slow, leading to long-term retention nitrophenol and accumulate in the environment, by the U.S. Environmental Protection Agency included in the " list of priority pollutants "caused serious pollution to the environment.Internal electrolysis technology is based on the principle of the electrochemical redox reaction, the reaction medium composed by a primary cell of the wastewater treatment of the chemical treatment process. Since 1960s, people began to study, which has been widely used in dyeing wastewater, gas and pharmaceutical waste washing water and other biodegradable waste water areas. It may enhance the waste water to be possible the biochemistry, to open the new way for industry in difficult biochemistry waste water's processing.This experiment is mainly studing the disposaling effects of Fe/C internal electrolysis craft of and Al/C electrolysis craft under the acidic condition . Using the orthogonal test to determine two craft optimum response conditions. They are: 1) Fe / C internal electrolytic process orthogonal test results show that the optimal reaction conditions: pH = 3, the iron-carbon ratio is 1:1, reaction time is 3h; In this condition, COD, nitro-phenols and color removal rate are: 73.2%, 96.3% and 94.1%. 2) Al / C internal electrolysis orthogonal test showed that the optimal reaction conditions of the process: pH = 5, aluminum carbon ratio is 2:3, reaction time is 3h. In this condition, COD, nitro-phenols and color removal rates are 65.34%, 89.7% and 94.1 %. In comparison, Fe / C internal electrolytsis process for the COD, the removal rate is superior to nitro-phenol Al / C e internal electrolysis process.Meanwhile, this experiment was studing the biodegradability of wastewater by BOD₅/COD method before and after electrolysis .The results show that BOD₅/COD of the original waste water increased value from 0.14 to 0.44 by Fe / C internal electrolysis process and BOD₅/COD of the original waste water increased value from 0.14 to 0.38 by Al / C internal electrolysis process , both greatly improving the biodegradability of wastewater.In addition, this experiment analyzed economic indicators of the Fe / C internal electrolysis process and the Al / C internal electrolysis process . The results showed that: wastewater treatment costs per unit volume of Fe / C internal electrolysis process is 5.83 yuan/m3and wastewater treatment costs per unit volume of Al / C internal electrolysis process is 6.36 yuan/m3. On the surface, Al / C internal electrolysis process needs a higher pH,but aluminum is much more expensive than iron, so the final cost of processing of Fe / C internal electrolysis process is cheaper than Al / C internal electrolysis process.Finally, the practical engineering applications also shows that: Fe / C internal electrolysis process as styphnate wastewater pretreatment process has achieved a good removal, Improving the biodegradability of wastewater. After the follow-up biochemical treatment, reaching the discharge standard for water pollutants from ordnance industry Initiating explosive material and relative composition(GB14470.2-2002).