Removal Of Nitrogen And Chromium In Leather Wastewater By Different Wastewater Quality Process

Tannery wastewater in after traditional biochemical treatment, most of the pollution indicatorscan reach "comprehensive effluent discharge standards prescribed emission standards (GB8978-1996) the only NH3-N, the total chromium value difficult to compliance. Large-scale use in the leather production process of ammonia salts and chromium salts, and many tanning animal belt feedstock NH3-N. the papers this reason was analyzed.Leather wastewater characteristics, the combination of different processes, this paper proposes a different quality denitrification in addition to chromium process. The process utilizes nitrogenous wastewater, wastewater containing chromium wastewater (hereinafter referred to as the "Water"), respectively, to deal with the process, so each craft it possible to run in accordance with the optimization of process parameters, and greatly improve denitrification, in addition to chromium and COD removal efficiency. Its technical and economic feasibility study in the thesis.This thesis Select the leather industry a City wastewater. First, the the leather city’s wastewater conduct research, based on technical analysis. Typical wastewater to determine the process plan, respectively, for the analysis of the water quality of the leather industry in the city, the high quality collection, chemical methods to remove NH3-N, total chromium of physical and chemical methods programs. Combined with the the leather city’s wastewater to to produce conducting an economic analysis. Through the above investigation, analysis, research, a Division into sewage treatment plants engineered to provide different quality denitrification process plan in addition to chromium.