本文選題：鐵碳內(nèi)電解 + 人工濕地　； 參考：《廣西師范大學(xué)》2017年碩士論文

【摘要】：近年來(lái),在中國(guó)處理分散式農(nóng)村污水的問題已經(jīng)得到廣泛的關(guān)注。截至2014年,不少未經(jīng)處理的生活污水容易通過點(diǎn)源和非點(diǎn)源排放,嚴(yán)重污染各類水源,導(dǎo)致出現(xiàn)了包括藍(lán)藻水華等諸多生態(tài)環(huán)境問題。因此為提高當(dāng)前農(nóng)村區(qū)域污水的處理技術(shù),提出了新型的鐵碳耦合人工濕地系統(tǒng)技術(shù)。本文通過對(duì)比研究處理模擬分散式農(nóng)村生活污水,研究了鐵碳內(nèi)電解耦合人工濕地生態(tài)處理工藝的除污效能。經(jīng)過半年的植培養(yǎng)生長(zhǎng),待植物生長(zhǎng)穩(wěn)定后,通過改變停留時(shí)間分別研究了啟動(dòng)階段及出水穩(wěn)定階段的COD、磷酸鹽和氨氮的濃度,并利用SAS科學(xué)統(tǒng)計(jì)分析方法,比較了不同植物系統(tǒng)之間的出水中不同因子濃度方面的顯著性差異,以用于對(duì)比ICCW與CW在污水處理性能方面的異同。首先研究發(fā)現(xiàn),在啟動(dòng)階段,第一天的時(shí)候,ICCW系統(tǒng)較CW的COD及磷酸鹽出水濃度低,說明鐵碳對(duì)COD的去除有增強(qiáng)作用,并且發(fā)現(xiàn),在改變停留時(shí)間后,所有系統(tǒng)在6天之內(nèi),COD、磷酸鹽及氨氮的出水濃度能夠達(dá)到穩(wěn)定。另外,在穩(wěn)定階段,通過連續(xù)定時(shí)采集分析出水的方法,分析了穩(wěn)定階段植物系統(tǒng)的出水指標(biāo)。在pH方面,新型的ICCW系統(tǒng)較傳統(tǒng)的CW系統(tǒng)的出水pH增強(qiáng)。由于ICCW系統(tǒng)出水pH較大,意味著新型系統(tǒng)有處理酸性廢水的潛能。在磷酸鹽的去除方面,鐵碳微電解對(duì)相對(duì)于傳統(tǒng)人工濕地,具有較高的去除率,在HRT停留時(shí)間在1天的時(shí)候,就能達(dá)到一級(jí)A,因此還具有較高的磷去除負(fù)荷空間。另外,在去除率方面:由于分散式農(nóng)村生活污水中,具有較少的有機(jī)磷,因此模擬污水中目前只加入了無(wú)機(jī)磷作為試驗(yàn)條件,因而本文中只對(duì)出水的無(wú)機(jī)磷進(jìn)行測(cè)定。當(dāng)HRT為3天的時(shí)候,ICCW系統(tǒng)對(duì)PO43-的去除率平均可達(dá)97.55%,效果最好,無(wú)論是CW系統(tǒng)或是ICCW系統(tǒng),風(fēng)車草對(duì)PO43-去除效果都非常優(yōu)異,新型耦合鐵碳系統(tǒng)中氫氧化鐵膠體對(duì)磷的去除具有良好的吸附與絮凝作用,鐵碳微電解對(duì)廢水中的污染物降解及吸附的效果理想。另外,垂直流濕地能實(shí)現(xiàn)對(duì)農(nóng)村生活污水的連續(xù)處理,管理簡(jiǎn)單,對(duì)污水中有機(jī)物仍有較好的去除效果,去除效率為85%左右,出水CODcr濃度低于50mg/L;對(duì)N、P具有一定的凈化作用,磷酸鹽的去除效果穩(wěn)定,效率約為90%。通過將廉價(jià)的碳粉與鐵粉制備成鐵碳填料,并加入至填料柱中,實(shí)現(xiàn)對(duì)COD、P043-的去除效果,優(yōu)于單一人工濕地的處理,且去除效果有穩(wěn)定趨勢(shì)。在不加鐵碳的狀態(tài)下,填料柱對(duì)污水的TP去除不明顯,出水TP的濃度相比其他處理效果最差。當(dāng)水力停留時(shí)間為3天時(shí),新型鐵碳系統(tǒng)對(duì)COD與磷酸鹽的去除率分別為95.80%與97.55%,此時(shí)對(duì)應(yīng)的CW系統(tǒng)的COD與磷酸鹽的去除率分別為66.74%與90.48%。此時(shí)起作用的主要是微生物,鐵碳內(nèi)電解可以提高處理效率。在加入鐵碳的處理中,填料柱對(duì)COD的去除效果好于不加鐵碳的處理,維持在85%以上。鐵碳耦合人工濕地工藝對(duì)COD、PO43-有良好的去除的效果和穩(wěn)定的處理趨勢(shì),因此通過實(shí)際生活污水的試驗(yàn)發(fā)現(xiàn),通過鐵碳與人工系統(tǒng)耦合建立的新型人工系統(tǒng),具有處理效率高與處理性能穩(wěn)定的優(yōu)點(diǎn),同時(shí)由于處理效率高,因此一定可以減少濕地面積,達(dá)到減少建設(shè)面積與建造費(fèi)用的目的,同時(shí)降低了傳統(tǒng)人工濕地處理性能易受病蟲害影響性能的風(fēng)險(xiǎn),提高了系統(tǒng)的穩(wěn)定性。同時(shí),鐵碳內(nèi)電解具有優(yōu)良的降解性能,因此未來(lái)新型系統(tǒng)在農(nóng)藥廢水、印染廢水及制藥廢水等處理領(lǐng)域?qū)⒕哂袕V泛應(yīng)用。
[Abstract]:In recent years, the problem of dealing with distributed rural sewage in China has been widely paid attention. As of 2014, many untreated sewage can easily be discharged through the point source and non point source, causing serious pollution of various water sources, leading to the emergence of many ecological environmental problems, including cyanobacteria bloom, and so on. In this paper, a new type of iron carbon coupled artificial wetland system technology is put forward. In this paper, by comparing and studying the simulated decentralized rural domestic sewage, the removal efficiency of the ecological treatment process of iron carbon internal electrolysis coupled artificial wetland is studied. After half a year of plant growth and growth, the residence time is studied by changing the residence time. The concentration of COD, phosphate and ammonia nitrogen in the starting stage and the stable stage of the effluent and the statistical analysis method of SAS were used to compare the significant differences in the concentration of different factors in the effluent of different plant systems, in order to compare the similarities and differences between ICCW and CW in the performance of sewage treatment. At the time of the day, the ICCW system is lower than the CW COD and phosphate effluent, indicating that the iron carbon has an enhanced effect on the removal of COD. And it is found that the effluent concentration of COD, phosphate and ammonia can be stable within 6 days after changing the residence time. The effluent index of the plant system in the stable stage is analyzed. In pH, the new ICCW system is better than the traditional CW system. Due to the larger pH of the ICCW system, the new system has the potential to deal with the acid wastewater. In the aspect of phosphate removal, the iron carbon micro electrolysis has a high removal rate for the traditional artificial wetland. When the HRT residence time is 1 days, the first order A can be reached, so it also has a higher phosphorus removal load space. In addition, in the aspect of removal rate, because of the small amount of organophosphorus in the dispersed rural domestic sewage, only inorganic phosphorus is added in the simulated sewage as the test condition, so only the inorganic phosphorus in the effluent is added into this paper. When HRT is 3 days, the average removal rate of ICCW system to PO43- is up to 97.55%, and the effect is best. The removal efficiency of PO43- is excellent both in CW system and in ICCW system. The new coupling iron carbon system has good adsorption and flocculation effect on phosphorus removal and iron carbon micro electrolysis in Wastewater. The effect of degradation and adsorption of pollutants is ideal. In addition, vertical flow wetland can achieve continuous treatment of rural domestic sewage. It has simple management and good removal effect on organic matter in sewage. The removal efficiency is about 85%, the concentration of CODcr in effluent is lower than 50mg/L; N, P has a certain purification effect, and the removal efficiency of phosphate is stable and efficient. The removal efficiency of COD and P043- is better than that of single artificial wetland, and the removal effect has a stable trend. In the state of non iron carbon, the removal of TP in sewage is not obvious, and the concentration of TP in the effluent is compared with other treatment effects in the state of 90%. without iron carbon. When the hydraulic retention time is 3 days, the removal rate of COD and phosphate is 95.80% and 97.55% respectively. At this time, the COD and phosphate removal rate of the corresponding CW system is 66.74% and 90.48%. at this time is mainly microorganism, and the iron carbon internal electrolysis can improve the processing efficiency. The removal efficiency of COD is better than that of non iron carbon treatment, maintaining more than 85%. The iron carbon coupled artificial wetland has a good removal effect and a stable treatment trend for COD and PO43-. Therefore, the new artificial system established by the coupling of iron carbon and artificial system has been found to have high treatment efficiency by the experiment of actual domestic sewage. With the advantages of stable performance and high efficiency, it can reduce the area of wetland, reduce the construction area and construction cost, and reduce the risk of the performance of the traditional artificial wetland, which is easily affected by diseases and insect pests, and improve the stability of the system. At the same time, the iron carbon internal electrolysis has excellent degradability. Therefore, the new system in the future will be widely used in the fields of pesticide wastewater, printing and dyeing wastewater and pharmaceutical wastewater.

【學(xué)位授予單位】：廣西師范大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：X703

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本文編號(hào)：1845511