| Abstract: | Fine Chemical wastewater is a typical industrial organic and non-biodegradable wastewater with high strength of COD, ammonia nitrogen and color. In order to improve the treatment efficiency of the wastewater from a Fine Chemical Industrial Park in Zhejiang Province, several indexes including COD, BOD, ammonia nitrogen, color, anions, cations, heavy metals and organic compounds were analyzed by ion chromatography, ICP/MS, GC/MS and other regulatory analytical methods. The pollution characteristics of the fine chemical wastewater were revealed from chemical and biological analysis results, through which the control strategies were proposed. Results indicated that COD, ammonia nitrogen, heavy metals, dyes and their decomposition substances were the main toxic pollutants in the wastewater. The organic compounds, which were determined as hardly biodegradable or toxic compounds, inhibit the micro-organisms, so that the quality of outflow couldn't satisfy the discharge criterion. Therefore, the treatment of fine chemical wastewater should prior consider the treatment of toxic compounds, the process efficiency, the appropriate water quality structure and effective policy strategies. |
