本文選題：氣田廢水 + 有機(jī)組分�。� 參考：《成都理工大學(xué)》2015年碩士論文

【摘要】：分析氣田廢水中的有機(jī)物成分,對(duì)于研究氣田廢水有機(jī)物的降解機(jī)制,處理工藝的選擇,提高廢水的處理效果等具有重要的理論和實(shí)踐意義。對(duì)氣田廢水中有機(jī)污染物的分析,通常采用化學(xué)需氧量(COD)、生化需氧量(BOD5)、總有機(jī)碳(TOC)等綜合性指標(biāo),這些指標(biāo)不能反映不同氣田廢水的有機(jī)污染物類別和特征,對(duì)后期廢水處理的指導(dǎo)意義不是很強(qiáng)。根據(jù)現(xiàn)有資料,人們對(duì)我國(guó)氣田廢水的有機(jī)組成及其特征的研究還比較少。本研究首先對(duì)采自某氣田的廢水進(jìn)行了常規(guī)水質(zhì)分析。結(jié)果顯示,該廢水中COD、石油類、懸浮物和濁度、硫化物、氯化物等較高;BOD5/COD只有0.11,屬于難生化降解的有機(jī)廢水。進(jìn)一步分析顯示,其中含有的有機(jī)物主要包括烷烴類、環(huán)烷烴類、芳香烴類,以及少量醇類和酮類。均相Fenton法處理這種難生化降解廢水效率較高,但同時(shí)也存在二次污染的問(wèn)題。根據(jù)前期分析結(jié)果,設(shè)計(jì)和研究了基于鐵柱撐膨潤(rùn)土催化的非均相Fenton法處理工藝以解決該問(wèn)題。優(yōu)化后的鐵柱撐膨潤(rùn)土催化劑合成工藝為:微波法合成,Fe/土=4mmol/g,固液比1:20;柱撐的水浴溫度為40℃;nFe:nNa為1:1.5;功率為539W。將所得到的催化劑用于某氣田廢水中CODcr的去除,綜合考慮去除率和成本等因素,處理100ml氣田廢水中CODcr的適宜的工藝條件為:pH≈7、H2O2加入量為1.0ml、鐵柱撐膨潤(rùn)土加入量為1g、溫度為室溫,反應(yīng)2h。進(jìn)一步實(shí)驗(yàn)表明在太陽(yáng)光照較為充足的條件下,太陽(yáng)光對(duì)該法處理氣田廢水中CODcr的反應(yīng)存在促進(jìn)作用。所合成的催化劑經(jīng)5次循環(huán)使用后對(duì)CODcr的去除率仍能達(dá)60%以上。通過(guò)對(duì)處理后廢水有機(jī)物的分析,發(fā)現(xiàn)處理后廢水中有機(jī)物的種類明顯減少,含量明顯降低,主要有機(jī)物(烷烴)幾乎全部降解,而存在于原廢水中的苯系物未得有效降解,醇類和酮類則有少部分降解。因此,該方法對(duì)主要污染物為烷烴的廢水具有很好的處理效果。同時(shí)也表明,通過(guò)細(xì)致的分析來(lái)評(píng)價(jià)水處理的效果是有必要的。
[Abstract]:The analysis of organic compounds in gas field wastewater is of great theoretical and practical significance for studying the degradation mechanism of organic matter in gas field wastewater, the selection of treatment process and the improvement of wastewater treatment effect.For the analysis of organic pollutants in gas field wastewater, chemical oxygen demand (COD), biochemical oxygen demand (Bod _ 5), total organic carbon (TOC) and so on are usually used, which can not reflect the types and characteristics of organic pollutants in different gas field wastewater.It is not very important for the treatment of waste water in the later stage.According to the available data, there are few studies on the organic composition and characteristics of gas field wastewater in China.In this study, the conventional water quality of the wastewater from a gas field was analyzed.The results showed that COD, petroleum, suspended solids and turbidity, sulfides, chlorides, etc., were only 0.11% COD in the wastewater, which was a kind of organic wastewater which was difficult to biodegrade.Further analysis shows that the organic compounds mainly include alkanes, cycloalkanes, aromatic hydrocarbons, and a small amount of alcohols and ketones.The treatment of this refractory wastewater by homogeneous Fenton process is more efficient, but there is also the problem of secondary pollution at the same time.Based on the results of previous analysis, the heterogeneous Fenton process based on iron pillared bentonite was designed and studied to solve the problem.The optimized synthesis process of iron pillared bentonite catalyst is as follows: microwave synthesis of 4 mmol / g, solid-liquid ratio of 1: 20, water bath temperature of 40 鈩，

本文編號(hào)：1769343