Experimental Research On The Treatment Of Organic Amine Wastewater

Total nitrogen content is high in organic amine wastewater which contains some difficult biodegrading and bio-inhibitory compounds. If this kind of wastewater was not treated effectively, it can not discharge into natural waters directly. At present, we have not proper method to solve the difficult problem at home and abroad. Wastewater which was discharged during the production of organic amine and its derivatives was studied by biochemical treatment in this paper. Based on the experiment, a new combined process of"a Co metabolism two-phase anaerobic—magnesium ammonium phosphate(MAP) chemical precipitation—SBR process"was applied to treat the organic amine wastewater. Also the technology and property of each process stage were analyzed deeply.The results of the experiment indicated that the addition of glucose in two-phase anaerobic process can improve the biodegradability of the wastewater evidently. It also suggested that COD removal rate and the transformation rate of ammonia nitrogen were both highest when the volume ratio between glucose solution (COD=2000 mg·L-1) and wastewater was 1:1.5, the acid pond HRT 12h and the anaerobic reactor HRT 24h. The outflow COD maintained 550 mg·L-1 and the outflow ammonium nitrogen was about 600 mg·L-1 when the inflow COD was around 2300mg·L-1 and the inflow ammonium nitrogen was about 70 mg·L-1. Then the effluent that had been treated by two-phase anaerobic was disposed by MAP chemical precipitation method. In actual operation, it is appropriate to control the operation conditions of pH=10, n(Mg2+):n(NH4+)=1.2, n(PO43-):n(NH4+)=1.1, t=10min. At last, the effluent was treated by SBR reactor. The outflow COD maintained 230mg·L-1 and ammonium nitrogen maintained below 15mg·L-1. The total COD and ammonium nitrogen removal rate of the combined process was 89% and 79% respectively. The results showed that the combined process is feasible to treat the organic amine wastewater.In this paper we try to explain the mechanism of organic compound by using UV spectrophotometer that scanning wavelength in and out water. The experiment also indicated that the main colourated substances were heterocyclic compounds. The results showed that the Coloring Structure Unit can be broke in anaerobic and anoxia condition. The most absorb wavelength excursed to long wave in UV light extent and the absorption strength reduced. It was considered that the structure of nitrogen heterocyclic compound was broken by hydroxylation. Then the intermediate product was degraded into simple compounds.