發(fā)布時間：2019-02-09 15:37

【摘要】：針對西安市第四污水處理廠二級生物處理出水難以穩(wěn)定達到一級A標(biāo)準(zhǔn)的問題,本論文通過比選,確定其改造方案為投加懸浮填料強化生物處理工藝以及增加濾布濾池深度處理工藝,并重點研究其處理效能。通過懸浮填料強化生物處理和濾布濾池深度處理的中試試驗,研究添加懸浮填料對污水處理的強化效果以及增加濾布濾池后的深度處理效果;通過將中試試驗成果應(yīng)用于西安市第四污水處理廠的提標(biāo)改造工程,研究懸浮填料強化工藝和濾布濾池深度處理工藝的實際運行效果。懸浮填料強化生物處理和濾布濾池深度處理的中試試驗表明:投加懸浮填料后可以顯著增強處理單元對NH_3-N和TN的去除效果,對COD,BOD_5,SS和TP的去除效果也有一定的提高作用。當(dāng)懸浮填料的填充率為30%、溶解氧濃度為3-4mg/L時試驗效果最佳,對NH_3-N和TN的去除率分別可提高30%和50%。濾布濾池深度處理工藝可以顯著增強處理單元對TP和SS的去除效果,當(dāng)濾布濾池與輔助化學(xué)除磷相結(jié)合,并對除磷藥劑類型和投量進行優(yōu)化可知:當(dāng)投加5mg/L的FeCl_2時效果最優(yōu),濾后水的TP和SS分別可降低30%和40%以上,對COD、BOD_5、NH_3-N和TN指標(biāo)也有10-20%的去除效果。濾后水穩(wěn)定達到一級A標(biāo)準(zhǔn)。將中試試驗成果應(yīng)用于西安市第四污水處理廠的提標(biāo)改造工程,對其進行6個月的長期監(jiān)測結(jié)果表明:對比與原二級生物處理后出水,濾后出水的COD平均濃度為28.8 mg/L,降低了26.4%;出水SS平均濃度為5.59 mg/L,降低了52.1%;出水NH_3-N平均濃度為2.37mg/L,降低了22.0%;出水TN平均濃度為10.3mg/L,降低了30.9%;出水TP平均濃度為0.16mg/L,降低了69.2%。改造后各項指標(biāo)均穩(wěn)定達到了一級A標(biāo)準(zhǔn)。
[Abstract]:In view of the problem that the effluent from the secondary biological treatment of the fourth wastewater treatment plant in Xi'an is difficult to meet the first class A standard, this paper passes the comparison and selection. It was determined that the modification scheme was enhanced biological treatment process with suspended filler and advanced treatment process of filter cloth filter, and its treatment efficiency was studied emphatically. Through the pilot-scale experiment of biological treatment and advanced treatment of filter cloth filter, the effect of adding suspended filler on sewage treatment and the effect of advanced treatment after adding filter cloth filter were studied. By applying the results of the pilot test to the upgrading project of the fourth sewage treatment plant in Xi'an, the practical operation effect of the suspended filler strengthening process and the filter advanced treatment process was studied. The pilot-scale experiment of biological treatment and advanced treatment of filter with suspended filler showed that the removal efficiency of NH_3-N and TN could be significantly enhanced by adding suspending filler, and the removal efficiency of COD,BOD_5, could be improved by adding suspending filler. The removal efficiency of SS and TP is also improved. When the filling ratio of suspensions is 30 and the concentration of dissolved oxygen is 3-4mg/L, the experimental results are the best. The removal rates of NH_3-N and TN can be increased by 30% and 50% respectively. The advanced treatment process of filter cloth filter can significantly enhance the removal effect of TP and SS by the treatment unit, when the filter cloth filter is combined with auxiliary chemical phosphorus removal, The optimization of the type and dosage of phosphorus remover showed that the optimal effect was obtained when FeCl_2 was added with 5mg/L, and the TP and SS of filtered water were reduced by 30% and 40% respectively. NH_3-N and TN also have 10-20% removal effect. The filtered water reaches the first A standard stably. The pilot test results were applied to the upgrading project of the fourth sewage treatment plant in Xi'an. The long-term monitoring results for 6 months showed that the average COD concentration of filtered effluent was 28.8 mg/L, compared with the original secondary biological treatment. 26.4% lower; The average concentration of effluent SS was 5.59 mg/L, the average concentration of effluent NH_3-N was 2.37 mg / L, decreased 22.0%, the average concentration of effluent TN was 10.3 mg / L, decreased 30.9mg / L; The average concentration of effluent TP was 0.16 mg / L, which decreased 69.2%. After the transformation, all the indexes are stable up to the first class A standard.
【學(xué)位授予單位】：西安建筑科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：X703

【參考文獻】

相關(guān)期刊論文 前10條

1 韓馥蔓;;淺談農(nóng)村污水來源及其處理的重要性和發(fā)展趨勢[J];中國高新技術(shù)企業(yè);2015年23期

2 趙靜;黃強;劉登峰;;渭河流域水沙演變規(guī)律分析[J];水力發(fā)電學(xué)報;2015年03期

3 劉真;汪維;莫文婷;周長波;章北平;;污水生化過程后置化學(xué)輔助除磷的實驗研究[J];環(huán)境科學(xué)與技術(shù);2014年12期

4 李靜;;兩種濾布濾池在污水深度處理中的應(yīng)用及比較[J];廣州化工;2014年23期

5 王海梅;;曝氣生物濾池在污水處理廠深度處理中的應(yīng)用[J];甘肅科技縱橫;2013年12期

6 劉躍旭;;市政污水深度處理中過濾技術(shù)研究進展[J];廣東化工;2013年18期

7 楊凡;;污水深度處理中濾布濾池型式分類淺析[J];中國市政工程;2013年02期

8 樊杰;胡晗;;化學(xué)鐵鹽輔助除磷對生物除磷的影響研究[J];環(huán)境科學(xué)與技術(shù);2013年02期

9 孫夢;張培玉;張晨;;城市污水的除磷技術(shù)分析[J];水處理技術(shù);2010年08期

10 余杰;田寧寧;錢靖華;李燕林;高成杰;;人工濕地在污水深度處理中的應(yīng)用與工程設(shè)計[J];中國給水排水;2009年04期

，

本文編號：2419109