设计总说明：制药废水通常是属于较难处理的高浓度有机废水，具有成分复杂，有机污染物种类多、浓度高、COD值和BOD值高且波动性大，废水的BOD5/COD值差异较大，NH3-N浓度高，色度深，毒性大，固体悬浮物SS浓度高等特点，不经处理排放会对环境造成严重的污染。71227

    本文主要设计一个制药废水处理厂，处理某制药厂每天排出最大水量为500 m3的制药废水，其平均排水水质情况为CODcr=11000mg/L、BOD5=4000mg/L、NH3-N=100mg/L、TP=30mg/L、SS=2000mg/L、SO42-=1000mg/L、PH=6.5-8。

根据分水水质分析，进水BOD5/ CODcr=0.364>0.3，可知废水具备生化性，但可生化性不高。所选工艺要提高废水的可生化性，并且要有对BOD5、CODcr去除效率显著，同时还要对氨氮有较强的去除效果。通过比较分析，可以使用上流式厌氧生物反应器（UASB）作为预处理，上流式厌氧生物反应器对COD的去除率达到60%~70%，对BOD的去除率较高为80%~90%，经过UASB的处理，能够提高废水的可生化性，同时去除大量COD。再接上两级A/O工艺进行污水处理：一级A/O对有机物的降解率比较高，达到60%~70%，脱氮效率十分明显，为60%~70%；二级A/O进一步对有机物降解，达到35%~40%，脱氮效率明显，为20%~30%。经过两级A/O工艺，达到脱氮除磷的目的。最后再接上膜生物反应器、纳滤和反渗透物理法进行深度处理，确保废水的出水水质达到《制药工业污染物排放标准 混装制剂类》(GB 21908—2008)标准。

根据确定的工艺流程，通过设计通过对格栅、调节池、上流式厌氧反应器、A/O 生物反应池、膜生物反应器（MBR）、纳滤和反渗透装置和污泥浓缩池等构筑物的主要尺寸的设计计算、水力损失计算及管路的计算，完成设计说明书、工艺流程图(含高层布置)、平面布置图和主体构筑物单体图，并且对制药废水处理厂的平面和高程进行了合理的布置。

本设计具有技术上可行、经济上合理的效果。投资费用为644.76万元，运行费用约为394.75万元/年，平均每吨废水处理费用为21.63元。

本次设计的工艺运行稳定，占地面积小，处理效果好，二次污染少。采用目前较为成熟的处理工艺，污水经处理后，预计可以到达到《制药工业污染物排放标准 混装制剂类》 (GB 21908—2008)排放标准，实际出水水质大致如下，COD=100mg/L; BOD5=20mg/L；SS=70mg/L；NH3-N=15mg/L；SO42-=1.0mg/L；TP=0.5mg/L；PH=6-9。达到消除污染、实现环境保护和造福人类的目的。

毕业论文关键字：制药废水处理；UASB；A/O工艺；MBR；纳滤；反渗透

Design of pharmaceutical wastewater treatment process

Abstract：Pharmaceutical wastewater usually belongs to high concentration organic wastewater which is difficult to be treated.It has complex components and many kinds of organic pollutants,high concentration,COD and BOD values are high and volatile,the BOD5/COD value of wastewater is quite different, NH3-N concentration is high, Deep chromaticity, Toxicity of big, High in solid suspended objects SS And so on. Unprocessed emissions can cause serious pollution to the environment.

   This paper mainly designs a pharmaceutical wastewater treatment plant . Dispose of pharmaceutical waste water of 500 m3 per day.The average water quality of the water is CODcr=11000mg/L、BOD5=4000mg/L、NH3-N=100mg/L、TP=30mg/L、SS=2000mg/L、SO42-=1000mg/L、PH=6.5-8.

   According to the water quality analysis, BOD5/ CODcr=0.364>0.3.We can see Wastewater is biochemical, But biochemical is not high. The selected process to improve the biodegradability of wastewater, and have to BOD5、CODcr removal efficiency is significant, but also a strong removal of ammonia nitrogen effect. By comparative analysis, an upflow anaerobic bioreactor (UASB) can be used as a pretreatment. Upflow anaerobic bioreactor COD removal rate of 60% to 70%, the removal rate of BOD is 80% ~ 90%. After UASB processing, can improve the biodegradability of wastewater, While removing large amounts of COD. And then connected to two A / O process for sewage treatment: A / O degradation rate of organic matter is relatively high, up to 60% to 70%, Denitrification efficiency is very obvious, up to 60% to 70%; Secondary A / O further degradation of organic matter, reaching 35% to 40%, Denitrification efficiency is obvious, reaching 20% to 30%. After two-stage A / O process, to achieve the purpose of nitrogen and phosphorus removal. And finally the upper membrane bioreactor, nanofiltration and reverse osmosis physical method for advanced treatment.To ensure that the effluent water quality to meet the "pharmaceutical industry pollutant discharge standard mixed preparation category" (GB 21908-2008) standard.