Biological Nitrogen Removal Process Research Of Pharmaceutical Park Wastewater

Luancheng county sewage treatment plant, more than 80% of the wastewater source belongs to the pharmaceutical industrial park wastewater, due to the original process design is not fully considering the factors such as nitrogen and remove chromaticity, ammonia nitrogen and chroma removal is not stable, with the national emission standard strictly, the plant is an urgent need to optimize the original technology upgrading in order to achieve national emission standard. This topic proposed aiming at Luancheng county sewage treatment plant pharmaceutical industrial park wastewater source, water quality characteristics, determine the renovation process of the " hydrolytic acidification + A/O/A + Obel oxidation ditch + double catalytic oxidation system + efficient sedimentation tank " process, to Luancheng county sewage treatment plant to improve nitrogen and other organic material removal rate of actual operation technical reference for the reconstruction project. The specific conclusions are as follows:Was investigated through the renovation process of commissioning test, the COD and NH3-N, TN and TP removal efficiency, the results show that the A/O/A-Obel oxidation ditch process on COD removal rate to an average of more than 63%, after deep processing double catalytic oxidation system, the average removal rate of COD is more than 85%, the water stability under 50 mg/L; The average removal rate of NH3-N is more than 85%; TN removal rate to an average of more than 61%; TP removal rate to an average of more than 86%; Effluent water quality can reach " the town sewage treatment plant pollutant discharge standard "(GB18918-2002) in the level of A standard; At the same time for each processing unit operation parameters are optimized.Technical and economic feasibility analysis showed that: "A/O/A + Obel oxidation ditch + double catalytic oxidation system + efficient sedimentation tank" process is stable, efficient and reliable running etc. Upgrading project total investment 23.352 million yuan, after transforming sewage disposal fee 1.38 / ton daily operation and management of the project after the implementation of COD, BOD5, NH3-N, TN, TP of reductions, respectively for 9868 t/a, 6354 t/a, 658 t/a, 551 t/a, 66 t/a, environmental benefit and social benefit is remarkable.