Treatment Of Charge Regulator Wastewater By United Technology

Industrial wastewater is recognized as a kind of water which is hard to degrade at today, In particular from the fine chemical industry which produces Intermediates and special colorants. This kind of waste water is high concentration of COD, high chromic, poor of biodegradation and toxic. If it discharges directly without properly treatment, it will result to pollute the water environment and ecosystem, endanger human health and restrict economic sustainable development. So according to this kind of waste water, R&D new process which is high efficiency and low cost become the hotspot of waste water treatment.The chemical factory in Hubei province which produces charge regulator and special colorants is a high-tech enterprise, the factory former process of wastewater treatment has some disadvantage such as high cost,low ability to resist the impact of load and complex manipulation and so on. According to the Charge regulator wastewater, this experimental study compares the efficiency of coagulation and micro- electrolysis, and chooses micro-electrolysis as the pretreatment process, then the pretreatment effluent is disposed by phase of biological treatment including Hydrolysis -Acidification and SBBR. Through these processes in series, the effluent quality can meet the requirement. The lab experiment demonstrates that adopting micro-electrolysis,hydrolysis-acidification and SBBR process to treat the factory wastewater is feasible, and the optimization operational parameters are determined by studying these conditions of influencing the removal efficiency of pollutants. It can be drawn the following conclusion by analyzing experimental results.(1) Comparing the removal efficiency of pollutants of coagulation and micro-electrolysis at each optimization operational parameters, the removal rate of COD gets to 31.47～34.26% and 67.79～70.59% respectively, the B/C date get 0.19 and 0.30 respectively. The results show that coagulation's removal efficiency is obviously better than micro-electrolysis.(2) The optimization operational parameters of micro-electrolysis as follows: the pH index of wastewater is primary, the rate of Fe/C is 1:1.5, and the reaction time is 1h. The stuffing in the micro-electrolysis reactor will be eroded and obtuse after a period of time to operate. In order to maintain high removal efficiency, the stuffing has been activated for two hours by hydrochloric acid which's concentration is 6% every three days, and renewing some scrap iron into reactor is to keep the optimal rate of Fe/C.(3) It takes about 35 days to succeed in cultivating hydrolysis-acidification reactor, the optimization operation parameters of hydrolysis-acidification as follow: the pH index of wastewater is 7.5～7.8, HRT is 9h, when the reactor runs stably, Under the optimal conditions, the removal rate of COD can get 29.97～35.26%, and the date ofB/C is above 0.49.(4) SBBR reactor which is used fibrous sphere as stuffing has high efficiency of biofilm that is activated and cultivated quickly. The operational mode of hydrolysis-acidification and SBBR is to compose A-O-A process. when the quantity of aeration is 0.25L/min, the time of aeration and sedimentation are 8h and 1.5h respectively, the removal rate of COD can get 84.65%～91.27%, the removal rate of NH₃-H is above 83.27%.(5) The experiment results show that the charge regulator wastewater can be mostly degrade by micro-electrolysis,hydrolysis-acidification and SBBR in series. the effluent quality can meet the requirement of entering the municipal sewage pipe net. The process which has the ability to resist the impact of load is valuable to be consulted for pilot project.