發(fā)布時間：2018-04-22 16:01

  本文選題：氮磷零排放 + 化學除磷��； 參考：《華東理工大學》2017年碩士論文

【摘要】：蘇州某外商獨資制藥企業(yè)擬在蘇州市吳中經(jīng)濟技術開發(fā)區(qū)擴建善存系列和鈣爾奇系列片劑生產(chǎn)線,這兩類片劑的配方中均有少量含氮磷的化合物,因此其工藝廢水(主要是設備清洗水和地面沖洗水)不可避免地會含有少量氮磷污染物。然而,根據(jù)《江蘇省太湖水污染防治條例》(2012年修訂)和蘇州市環(huán)境保護局的相關規(guī)定,蘇州境內(nèi)的新建、擴建含氮磷污染物的企業(yè)或項目必須執(zhí)行廢水"零排放"或廢水氮磷"零排放"。這些企業(yè)或項目的廢水經(jīng)深度處理后不能回用于生產(chǎn)工藝的(如通過GMP認證的制藥企業(yè)或項目)執(zhí)行廢水氮磷"零排放",其他企業(yè)或項目執(zhí)行廢水"零排放"。蘇州某外商獨資制藥企業(yè)是一家通過GMP認證的制藥企業(yè),根據(jù)建設項目環(huán)境影響評價報告書的批復,該公司擬擴建的項目必須執(zhí)行廢水氮磷"零排放"。國內(nèi)外現(xiàn)有廢水深度技術可以實現(xiàn)廢水"零排放",但未見廢水氮磷"零排放"的研究報道。受蘇州某外商獨資制藥企業(yè)的委托,研究開發(fā)了制藥廢水氮磷"零排放"技術。首先通過實驗室小試探討了混凝沉淀預處理、生化處理、超濾-反滲透深度處理組合工藝實現(xiàn)制藥廢水氮磷"零排放"的可行性;然后在實驗室小試的基礎上設計加工了一套中試裝置,一方面通過現(xiàn)場中試進一步驗證小試結(jié)果,另一方面也為工程設計提供更加可靠的技術參數(shù)。實驗室小試與現(xiàn)場中試結(jié)果表明:用FeCl_3作混凝劑進行混凝沉淀預處理時,不需要調(diào)節(jié)廢水的pH值。投加150～200 mg/LFeCl_3可以去除95%左右的濁度和磷酸鹽。混凝沉淀預處理出水經(jīng)A/O工藝生化處理,可以去除大約72%的COD、86%的氨氮、58%的總氮和53%的總磷。生化處理單元出水用超濾/反滲透工藝進行深度處理,一級反滲透的產(chǎn)水率≤33%時,透過水的NH_3-N、TN和TP均未檢出;當一級反滲透的產(chǎn)水率≈50%時,透過水的NH_3-N和TP未檢出,但檢出TN;當一級反滲透的產(chǎn)水率≈67%時,透過水的TP仍未檢出,但NH_3-N和TN均被檢出。采用二級反滲透工藝對生化出水進行深度處理,當?shù)谝患壓偷诙壏礉B透的產(chǎn)水率均為67%時,第二級RO透過水的NH_3-N、TN和TP均未檢出,符合廢水氮磷"零排放"要求。用蒸發(fā)工藝處理反滲透濃縮水,所得蒸發(fā)冷凝水含有少量的氮和磷,不符合廢水氮磷"零排放"要求。蒸發(fā)冷凝水應返回反滲透單元作進一步處理。
[Abstract]:A wholly foreign-owned pharmaceutical enterprise in Suzhou is planning to expand the production lines of Shancun series and Calcius series tablets in Wuzhong Economic and technological Development Zone, Suzhou. The formulations of these two kinds of tablets contain a small amount of compounds containing nitrogen and phosphorus. Therefore, the process wastewater (mainly equipment washing water and ground washing water) will inevitably contain a small amount of nitrogen and phosphorus pollutants. However, according to the regulations on Water pollution Control of Taihu Lake in Jiangsu Province (revised in 2012) and the relevant regulations of Suzhou City Environmental Protection Bureau, the new construction in Suzhou, The expansion of enterprises or projects containing nitrogen and phosphorus pollutants must carry out zero discharge of wastewater or zero discharge of nitrogen and phosphorus in wastewater. After advanced treatment, wastewater from these enterprises or projects cannot be reused in production processes (such as pharmaceutical enterprises or projects certified by GMP) to implement "zero discharge" of nitrogen and phosphorus, and other enterprises or projects to implement "zero discharge" of wastewater. A wholly foreign-owned pharmaceutical enterprise in Suzhou is a pharmaceutical enterprise certified by GMP. According to the approval of the environmental impact assessment report of the construction project, the project to be expanded by the company must carry out "zero discharge" of nitrogen and phosphorus in wastewater. The existing wastewater depth technology at home and abroad can realize "zero discharge" of wastewater, but there is no report on "zero discharge" of nitrogen and phosphorus in wastewater. The technology of zero discharge of nitrogen and phosphorus from pharmaceutical wastewater was studied and developed by a wholly foreign owned pharmaceutical enterprise in Suzhou. At first, the feasibility of the combination of coagulation and precipitation pretreatment, biochemical treatment, ultrafiltration and reverse osmosis advanced treatment process to realize the "zero discharge" of nitrogen and phosphorus in pharmaceutical wastewater was discussed. Then a set of pilot plant is designed and processed on the basis of laboratory test. On the one hand, the results of the pilot test are further verified by the field pilot test, and on the other hand, more reliable technical parameters are provided for the engineering design. The results of laboratory and field pilot-scale tests show that the pH value of wastewater does not need to be adjusted when FeCl_3 is used as coagulant for coagulation and precipitation pretreatment. About 95% of turbidity and phosphate can be removed by adding 150 mg/LFeCl_3. The treated effluent was treated by A / O process, and about 72% of COD ~ (2 +), 86% of ammonia nitrogen, 58% of total nitrogen and 53% of total phosphorus were removed. The effluent of biochemical treatment unit was treated with ultrafiltration / reverse osmosis process. When the water yield of first stage reverse osmosis was 鈮，

本文編號：1787922