【摘要】：醫(yī)藥行業(yè)廢水具有有機(jī)污染物濃度高,有毒有害物質(zhì)多等特點(diǎn),屬于我國(guó)工業(yè)水處理領(lǐng)域的熱點(diǎn)與難點(diǎn)。針對(duì)醫(yī)藥廢水可生化性不高,難降解有機(jī)物種類多的問題,本文對(duì)Fenton氧化-厭氧-接觸氧化聯(lián)用技術(shù)處理醫(yī)藥廢水性能進(jìn)行了研究。論文首先考察了 Fenton氧化技術(shù)處理醫(yī)藥廢水的效果,優(yōu)化了 Fenton氧化處理醫(yī)藥廢水的工藝參數(shù);在此基礎(chǔ)上,設(shè)計(jì)和建立了 Fenton氧化-厭氧-接觸氧化聯(lián)用技術(shù)處理200m~3/d醫(yī)藥廢水過程,并進(jìn)行了調(diào)試優(yōu)化,處理后出水滿足相關(guān)的設(shè)計(jì)標(biāo)準(zhǔn)。具體研究結(jié)果如下。1.Fenton小試試驗(yàn)結(jié)果表明,在進(jìn)水COD濃度約60000mg/l的條件下,隨著H_2O_2與去除COD質(zhì)量之比的增加,COD去除率達(dá)到極值后緩慢下降;SS去除率則不斷降低。隨著n(H_2O_2)與n(Fe2+)的比值增加,COD去除率達(dá)到極值后緩慢下降;SS去除率則不斷降低。針對(duì)此類廢水,體系最佳的反應(yīng)條件為:m(H_2O_2):m(COD)=2:1、n(H202):n(Fe2+)=10:1、pH=2、t=40min。廢水中 COD 和 SS 去除率分別為57.02%和 79.77%。2.本論文采用厭氧-好氧生物處理工藝,Fenton裝置的水力停留時(shí)間為HRT=8.13h;缺氧池的水力停留時(shí)間為HRT=8.25h,有效水深為H=4.5m;接觸氧化池的水力停留時(shí)間為HRT=16.1h,有效水深為H=4.4m,容積負(fù)荷為2.0kgCOD/m~3.d.3.在200m~3/d的工程過程中,經(jīng)過Fenton氧化裝置、厭氧反應(yīng)池、接觸氧化池,醫(yī)藥廢水中COD、SS等均有較高的去除率。經(jīng)過Fenton裝置COD、SS平均去除率分別為29.34%、67.36%。再經(jīng)過厭氧裝置處理后其厭氧出水COD、SS、NH3-N 的最佳值為 4700mg/l,245mg/l,55mg/l,去除率分別為 62.20%,65.09%,73.17%。最后經(jīng)過接觸氧化池處理后,出水中COD、SS、TN、NH3-N、TP的去除效果都明顯高于厭氧條件下,通過聯(lián)用技術(shù),最后達(dá)標(biāo)排放。其最佳出水值分別為 80mg/l,56mg/l,34mg/l,6.4mg/l,5.4mg/l,去除率分別為 98.26%,71.13%,73.01%,85.11%,50.94%。上述研究表明,Fenton氧化-厭氧-接觸氧化聯(lián)用技術(shù)對(duì)醫(yī)藥廢水中的有機(jī)物降解作用明顯。通過Fenton氧化反應(yīng)體系將污水中的大分子有機(jī)物氧化分解為小分子有機(jī)物,提高了后續(xù)生物處理的可生化性,厭氧反應(yīng)系統(tǒng)進(jìn)一步將污水中難降解有機(jī)物分解為易降解有機(jī)物,再通過接觸氧化將有機(jī)物徹底降解。
[Abstract]:Pharmaceutical wastewater has the characteristics of high concentration of organic pollutants and many toxic and harmful substances. It is a hot and difficult point in the field of industrial water treatment in China. Aiming at the problem that the biodegradability of pharmaceutical wastewater is not high and there are many kinds of refractory organic compounds, this paper studies the performance of Fenton oxidation-anaerobic-contact oxidation technology in treating pharmaceutical wastewater. In this paper, the effect of Fenton oxidation technology on the treatment of pharmaceutical wastewater was investigated, and the process parameters of Fenton oxidation treatment were optimized. The process of Fenton oxidation-anaerobic contact oxidation combined treatment of 200m~3/d pharmaceutical wastewater was designed and optimized. The treated effluent met the relevant design standards. The results are as follows: 1. The results of Fenton small scale test show that under the condition of influent COD concentration about 60000mg/l, with the increase of the mass ratio of H_2O_2 to COD, the removal rate of H_2O_2 reaches the extreme value, and then the removal rate of SS decreases gradually. With the increase of the ratio of n (H_2O_2) to n (Fe2), the removal rate of H_2O_2 decreased slowly and the removal rate of SS decreased. The optimal reaction conditions for this kind of wastewater are: 1: M (H_2O_2): 2: 1 (COD) (H202): n (Fe2) 10: 1 (pH = 10: 1). The removal rates of COD and SS in wastewater were 57.02% and 79.77.2%, respectively. In this paper, the hydraulic retention time of HRT=8.13h; anoxic tank was 4.5m for HRT=8.13h;, HRT=16.1h, was 4.4m for contact oxidation tank, and the volumetric load was 2.0kgCODm3.d.3The HRT of Fenton plant was 4.4m. the HRT of Fenton plant was as follows: the HRT of HRT=8.13h; anoxic tank was 4.5m. the HRT of contact oxidation tank was HN4.4m. the hydraulic retention time of Fenton plant was 2.0kgCODm3.d.3. In the engineering process of 200m~3/d, the removal rate of COD,SS in Fenton oxidation plant, anaerobic reactor, contact oxidation tank and pharmaceutical wastewater is higher. The average removal rate of COD,SS by Fenton was 29.34% and 67.36% respectively. The optimum value of COD,SS,NH3-N in anaerobic effluent is 4700mg / L 245mg / L and the removal rate is 62.20g / L 65.09% 73.17mg / l, respectively. After the treatment of contact oxidation tank, the removal efficiency of COD,SS,TN,NH3-N,TP in effluent is obviously higher than that in anaerobic condition. The optimal effluent value is 80 mg / L / 56 mg / L 34 mg / L = 6.4 mg / L = 5.4 mg / L, and the removal rate is 98.26% and 71.13% / 73.01% and 85.11% respectively. The results showed that Fenton oxidation-anaerobic-contact oxidation combined with Fenton oxidation had obvious effect on the degradation of organic matter in pharmaceutical wastewater. The macromolecular organic matter in wastewater was oxidized into small molecular organic matter by Fenton oxidation reaction system, which improved the biodegradability of subsequent biological treatment, and the anaerobic reaction system further decomposed the refractory organic matter into easily degradable organic matter. The organic matter is thoroughly degraded by contact oxidation.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：X787

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本文編號(hào)：2250925