發(fā)布時間：2018-03-11 05:26

  本文選題：剩余污泥　切入點：預(yù)處理　出處：《哈爾濱工業(yè)大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：在傳統(tǒng)的活性污泥法中,污泥的厭氧消化是污泥處理處置的主要手段,但在污泥厭氧發(fā)酵過程中,污泥中微生物細胞壁難于破解,導(dǎo)致污泥水解成為了這一過程的限速環(huán)節(jié),造成了反應(yīng)器體積過大,反應(yīng)時間過長,增加了污泥處理費用,因此人們針對這一過程提出了很多預(yù)處理方法來破解微生物細胞。其中關(guān)于堿處理、臭氧處理研究的頗多,然而關(guān)于二者的組合預(yù)處理技術(shù)研究的較少。本課題主要研究堿處理、臭氧處理、堿與臭氧聯(lián)合預(yù)處理技術(shù)對污泥的破解效果、污泥性質(zhì)、厭氧發(fā)酵效能以及有機物的變化規(guī)律的影響,同時確定不同預(yù)處理技術(shù)應(yīng)用的最佳條件,污泥破解前后有機物的種類變化以及預(yù)處理技術(shù)實際應(yīng)用的可行性。不同預(yù)處理對剩余污泥性質(zhì)影響的研究表明,污泥經(jīng)過堿處理后,污泥的脫水性和沉降性有所下降,污泥經(jīng)過臭氧處理后,污泥的脫水性能下降,沉降性能得到改善。不同預(yù)處理技術(shù)對污泥的破解程度順序為:先臭氧后堿處理先堿后臭氧處理堿處理臭氧處理未處理。確定了堿處理的最佳條件為p H=12,臭氧處理的最佳投加量為0.3 g O3/g SS,堿與臭氧聯(lián)合預(yù)處理的最佳條件為p H=12,臭氧投加量0.3 g O3/g SS。通過預(yù)處理技術(shù)與厭氧發(fā)酵的組合工藝研究得出,堿與臭氧聯(lián)合預(yù)處理的污泥厭氧發(fā)酵效能要好于二者單獨作用的污泥,平均產(chǎn)酸量、產(chǎn)氣量均是先臭氧后堿處理先堿后臭氧處理堿處理臭氧處理未處理。并且當p H=12,臭氧投加量為0.12 g O3/g SS時,先臭氧后堿處理產(chǎn)生氣體總量最多,大約是剩余污泥產(chǎn)氣量的1.94倍左右,其中甲烷含量約為48.8%,而未處理的污泥所產(chǎn)甲烷含量僅為21.2%。通過紫外光譜分析發(fā)現(xiàn),經(jīng)過不同處理后的污泥上清液中腐殖類大分子有機物以及含C=C雙鍵和C=O雙鍵的芳香族化合物大幅度增加。并且通過熒光光譜分析發(fā)現(xiàn),剩余污泥中主要存在類芳香性蛋白和溶解性細胞副產(chǎn)物,經(jīng)過堿處理后污泥中物質(zhì)的種類沒有變化,但含量有所增加。經(jīng)過臭氧處理后,污泥上清液中主要存在類富里酸、溶解性細胞副產(chǎn)物類物質(zhì)、類腐殖酸物質(zhì)。污泥經(jīng)過先堿后臭氧處理后,污泥上清液中主要存在類芳香性蛋白質(zhì)、溶解性細胞副產(chǎn)物、類腐殖酸。經(jīng)過先臭氧后堿預(yù)處理后的污泥上清液中主要存在類芳香性蛋白質(zhì)物質(zhì)、類富里酸類物質(zhì)、溶解性細胞副產(chǎn)物類物質(zhì)、類腐殖酸物質(zhì)。堿和臭氧聯(lián)合預(yù)處理污泥厭氧消化技術(shù)的研究具有一定的理論指導(dǎo)意義,由于實驗用泥泥質(zhì)可生化性較差,能源回收相對較少,該技術(shù)能否應(yīng)用于實踐,還需綜合經(jīng)濟技術(shù)角度進一步研究。
[Abstract]:In the traditional activated sludge process, the anaerobic digestion of sludge is the main means of sludge treatment and disposal, but in the process of sludge anaerobic fermentation, the cell wall of microorganism in sludge is difficult to break down, which leads to the hydrolysis of sludge as the speed limiting part of the process. Because the reactor volume is too large, the reaction time is too long, and the sludge treatment cost is increased, so people put forward a lot of pretreatment methods to solve the microbial cells in this process, among which there are many researches on alkali treatment and ozone treatment. However, there are few researches on the combined pretreatment technology. This paper mainly studies the effect of alkali treatment, ozone treatment, combined pretreatment of alkali and ozone on sludge cracking, sludge properties, and so on. The effects of anaerobic fermentation efficiency and the change of organic matter, and the optimum conditions for the application of different pretreatment techniques were determined. The study on the effect of different pretreatment on the properties of excess sludge showed that the dewatering and sedimentation of sludge decreased after alkali treatment. The dewatering performance of sludge decreased after ozone treatment. Sedimentation performance was improved. The degree of sludge cracking by different pretreatment techniques was as follows: first ozone, then alkali treatment, then ozone treatment, alkali treatment, ozone treatment, untreated ozone treatment. The optimum conditions of alkali treatment were determined as follows: ph ~ (12), ozone unit. The optimum dosing amount is 0.3 g O 3 / g SS. the optimum condition of combined pretreatment of alkali and ozone is p H 2O 12, the dosage of ozone 0.3 g O 3 / g SS. through the combination of pretreatment technology and anaerobic fermentation, The anaerobic fermentation efficiency of the sludge pretreated with alkali and ozone was better than that of the sludge acting alone, and the average acid production was higher than that of the sludge treated with alkali and ozone. The amount of gas produced was the first ozone, then the alkali treatment, the ozone treatment alkali treatment, the untreated ozone treatment, and when the ozone dosage was 0.12 g O 3 / g SS, the total amount of the gas produced by the first ozone and then alkali treatment was the most, when the amount of ozone added was 0.12 g O 3 / g SS, It is about 1.94 times of excess sludge gas production, of which methane content is about 48.8, while that of untreated sludge is only 21.20.It is found by ultraviolet spectrum analysis. After different treatment, humic macromolecular organic compounds and aromatic compounds containing C / C and C / O double bonds in sludge supernatant were increased significantly. There were mainly aromatic proteins and soluble cell by-products in the excess sludge. After alkali treatment, the kinds of substances in the sludge did not change, but the content increased. After ozone treatment, there were mainly fulvic acids in the sludge supernatants. Soluble cell by-products, humic acid-like substances. After the sludge was treated with alkali and ozone, there were mainly aromatic proteins in the sludge supernatants, and soluble cell by-products. Humic acid. After ozone and alkali pretreatment, the sludge supernatant mainly contains aromatic protein substance, similar fulvic acid substance, soluble cell by-product substance, The study of humic acid-like substances, alkali and ozone combined pretreatment sludge anaerobic digestion technology has a certain theoretical significance. Due to the poor biodegradability and relatively little energy recovery, the technology can be used in practice. Further research is needed from the angle of comprehensive economy and technology.
【學(xué)位授予單位】：哈爾濱工業(yè)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1條

1 ;Optimization of H_2O_2 dosage in microwave-H_2O_2 process for sludge pretreatment with uniform design method[J];Journal of Environmental Sciences;2012年12期

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本文編號：1596799