混凝聯(lián)合技術處理昆明市洗車廢水的試驗研究
發(fā)布時間：2019-05-10 03:54
【摘要】：昆明市第三產(chǎn)業(yè)發(fā)展迅速,尤其是洗車業(yè)。隨著該行業(yè)的不斷發(fā)展,其用水量和廢水量越來越大。洗車廢水中含有大量泥沙、洗滌劑等的污染物,直接排入市政管網(wǎng)會加重城市排水設施和污水處理設施的負擔。因此,研究洗車廢水的處理回用對節(jié)約水資源和改善城市水環(huán)境具有較大意義。目前昆明市洗車行具有較分散的特點,洗車臺廢水由排水溝收集匯流進入入沉淀池。對沉淀池的進出水進行連續(xù)的水質(zhì)監(jiān)測,數(shù)據(jù)表明昆明市洗車廢水中的色度、濁度、COD、LAS這四項指標屬于嚴重污染指標,因此便展開了降低昆明市洗車廢水中色度、濁度、COD、LAS濃度的研究,旨在為洗車廢水的回用工程實踐提供借鑒和參考。本研究主要包含的內(nèi)容有：①單一混凝劑、復合混凝劑處理洗車廢水的效果及其二者的優(yōu)劣；②粉末活性炭(PAC)處理洗車廢水的最佳工況,并對其吸附機理進行初步分析；③粉末活性炭和混凝劑組合的處理情況及組合的最佳方式；④雙氧水的引進對③中處理方式的影響,并確定雙氧水的影響因素；⑤采用不同組合方式處理洗車廢水,明確各種方式的優(yōu)劣；⑥在"H2O2+Al2(SO4)3-PFS+PAC"工藝基礎上增加過濾工藝,研究該工藝的處理效果,并對過濾的濾速和濾層厚度對污染物去除影響進行研究。研究結果表明：通過大量資料的比對分析所篩選出的混凝劑在最合適投加量下對濁度的去除效果較好,Al2(SO4)3投加340mg/L時,濁度的去除率為99-11%；PFS的投加260mg/L時,濁度的去除率為99.00%;Al2(SO4)3-PFS以質(zhì)量比為1：3混合使用,投加280mg/L,對濁度的去除率達到99.27%。對COD和LAS的去除率而言,A12(S04)3-PFS比A12(S04)3分別約高8%和9%,比PFS分別約高3%和3%。②PAC投加量為1.6g/L,吸附45min時,COD的去除率達到70%以上,LAS的去除率達到85%以上。PAC對洗車廢水中還原性類物質(zhì)(COD)吸附符合Freundlich吸附等溫模型,對洗滌劑類物質(zhì)(LAS)吸附符合Langmuir等溫吸附模型。②PAC和混凝組合使用,PAC于混凝之后60s投加可以獲得較好的處理效果。④投加雙氧水對洗車廢水中COD的去除起到了一定的促進作用,但LAS的去除幾乎不受影響。當H202于混凝之前投加,且投藥量為5 mg/L時,COD能夠獲得最優(yōu)的處理效果。⑤PAC、Al2(SO4)3-PFS、PAC+Al2(SO4)3-PFS、H2O2+Al2(SO4)3-PFS+PAC這四種工藝對COD、LAS的去除效果存在較大的差異。四種工藝處理洗車廢水處理的效果由優(yōu)到劣依次為H2O2+Al2(SO4)3-PFS+PAC PAC+Al2(SO4)3-PFSPACAl2(S04)3-PFS。⑥在“H2O2+A12(SO4)3-PFS+PAC"的工藝上增加過濾工藝,濾后水中COD、LAS、色度、濁度指標值分別為22mg/L、0.47 mg/L、3倍、2.3NTU,達到了回用水水質(zhì)標準(《生活雜用水水質(zhì)標準》GJ25.1-89),不同濾速下和不同濾料層厚度下對LAS的去除效果有一定的影響。本課題通過室內(nèi)試驗研究,采用'H2O2+A12(SO4)3-PFS+PAC過濾”的工藝很大程度上降低COD、LAS、色度、濁度這四項指標的濃度,出水水質(zhì)達到了回用水的標準,為工程實踐提供了參考和借鑒。
[Abstract]:The tertiary industry in Kunming is developing rapidly, especially the car washing industry. With the development of the industry, the amount of water and waste water is increasing. The car-washing wastewater contains a large amount of pollutants such as silt, detergent and the like, and is directly discharged into the municipal pipe network to increase the burden of the urban drainage facilities and the sewage treatment facilities. Therefore, it is of great significance to study the treatment and reuse of car-washing wastewater to save water resources and improve the urban water environment. At present, the washing line in Kunming has the characteristics of more dispersion, and the wastewater of the car wash station is collected and collected by the drainage ditch into the sedimentation tank. The continuous water quality monitoring of the inlet and outlet water of the sedimentation tank indicates that the four indexes of the color, the turbidity, the COD and the LAS in the car-washing wastewater in Kunming are serious pollution indexes, so the research on the color, the turbidity, the COD and the LAS concentration in the washing wastewater of the Kunming city is expanded, The purpose of this paper is to provide reference and reference for the practice of the recycling of car-washing wastewater. The main contents of this study are as follows: the effect of a single coagulant and a compound coagulant in the treatment of car-washing wastewater and the advantages and disadvantages of the two; the best working condition of the activated carbon (PAC) to treat the car-washing wastewater and the preliminary analysis of its adsorption mechanism; The treatment of the combination of the activated carbon and the coagulant and the best mode of the combination are as follows: the influence of the introduction of hydrogen peroxide on the treatment method in the wastewater and the influencing factors of the hydrogen peroxide are determined; the wastewater of the car washing is treated by different combination methods, and the advantages and disadvantages of various manners are clear; The treatment effect of the process is studied by increasing the filtration process on the basis of the "H2O2+Al2(SO4)3-PFS+PAC" process, and the effect of the filtration rate and the thickness of the filter layer on the removal of the pollutants is studied. The results show that the removal rate of turbidity is 99-11% when adding 340 mg/ L of Al2 (SO4)3, the removal rate of turbidity is 99.00%, and the 3-PFS of Al2 (SO4)3-PFS is used in a mass ratio of 1:3. The removal rate of turbidity was 99.27% with the addition of 280 mg/ L. For COD and LAS removal rates, A12 (S04)3-PFS was about 8% and 9% higher than that of A12 (S04)3, respectively, and about 3% and 3% higher than PFS, respectively. And the removal rate of the LAS reaches more than 70%, and the removal rate of the LAS reaches more than 85%. The adsorption of the reducing substances (COD) in the car-washing wastewater by the PAC is in accordance with the Freundlich adsorption isotherm model, and the adsorption of the detergent substances (LAS) is in accordance with the Langmuir isotherm adsorption model. And the PAC and the coagulation combination are used, and a good treatment effect can be obtained after the PAC is added into the 60s after the coagulation. The removal of COD in the car-washing wastewater by the hydrogen peroxide and the hydrogen peroxide has a certain catalytic effect, but the removal of LAS is almost unaffected. When the H202 is added before coagulation, and the dosage of the H202 is 5 mg/ L, the optimal treatment effect can be obtained by the COD. There were significant differences in the removal of COD and LAS in the four processes including PAC, Al2 (SO4)3-PFS, PAC + Al2 (SO4)3-PFS, H2O2 + Al2 (SO4)3-PFS + PAC. The effect of four processes on the treatment of car-washing wastewater was as follows: H2O2 + Al2 (SO4)3-PFS + PAC PAC + Al2 (SO4)3-PFSPACA12 (S04)3-PFS. In the process of "H2O2+A12(SO4)3-PFS+PAC", the filtration process is increased, and the COD, LAS, chroma and turbidity index value in the filtered water are 22 mg/ L, 0.47 mg/ L,3 times, and 2.3 NTU, respectively, and the water quality standard for water return is achieved (the standard for water quality of water for domestic water use> GJ25.1-89). The effect of the different filtering speed and the thickness of different filter materials has a certain effect on the removal effect of LAS. In this paper, the process of "H2O2 + A12 (SO4)3-PFS + PAC filtration" is used to reduce the concentration of COD, LAS, chromaticity and turbidity, and the water quality of effluent reaches the standard of water return, and provides reference for engineering practice.
【學位授予單位】：昆明理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：X799
本文編號：2473321
[Abstract]:The tertiary industry in Kunming is developing rapidly, especially the car washing industry. With the development of the industry, the amount of water and waste water is increasing. The car-washing wastewater contains a large amount of pollutants such as silt, detergent and the like, and is directly discharged into the municipal pipe network to increase the burden of the urban drainage facilities and the sewage treatment facilities. Therefore, it is of great significance to study the treatment and reuse of car-washing wastewater to save water resources and improve the urban water environment. At present, the washing line in Kunming has the characteristics of more dispersion, and the wastewater of the car wash station is collected and collected by the drainage ditch into the sedimentation tank. The continuous water quality monitoring of the inlet and outlet water of the sedimentation tank indicates that the four indexes of the color, the turbidity, the COD and the LAS in the car-washing wastewater in Kunming are serious pollution indexes, so the research on the color, the turbidity, the COD and the LAS concentration in the washing wastewater of the Kunming city is expanded, The purpose of this paper is to provide reference and reference for the practice of the recycling of car-washing wastewater. The main contents of this study are as follows: the effect of a single coagulant and a compound coagulant in the treatment of car-washing wastewater and the advantages and disadvantages of the two; the best working condition of the activated carbon (PAC) to treat the car-washing wastewater and the preliminary analysis of its adsorption mechanism; The treatment of the combination of the activated carbon and the coagulant and the best mode of the combination are as follows: the influence of the introduction of hydrogen peroxide on the treatment method in the wastewater and the influencing factors of the hydrogen peroxide are determined; the wastewater of the car washing is treated by different combination methods, and the advantages and disadvantages of various manners are clear; The treatment effect of the process is studied by increasing the filtration process on the basis of the "H2O2+Al2(SO4)3-PFS+PAC" process, and the effect of the filtration rate and the thickness of the filter layer on the removal of the pollutants is studied. The results show that the removal rate of turbidity is 99-11% when adding 340 mg/ L of Al2 (SO4)3, the removal rate of turbidity is 99.00%, and the 3-PFS of Al2 (SO4)3-PFS is used in a mass ratio of 1:3. The removal rate of turbidity was 99.27% with the addition of 280 mg/ L. For COD and LAS removal rates, A12 (S04)3-PFS was about 8% and 9% higher than that of A12 (S04)3, respectively, and about 3% and 3% higher than PFS, respectively. And the removal rate of the LAS reaches more than 70%, and the removal rate of the LAS reaches more than 85%. The adsorption of the reducing substances (COD) in the car-washing wastewater by the PAC is in accordance with the Freundlich adsorption isotherm model, and the adsorption of the detergent substances (LAS) is in accordance with the Langmuir isotherm adsorption model. And the PAC and the coagulation combination are used, and a good treatment effect can be obtained after the PAC is added into the 60s after the coagulation. The removal of COD in the car-washing wastewater by the hydrogen peroxide and the hydrogen peroxide has a certain catalytic effect, but the removal of LAS is almost unaffected. When the H202 is added before coagulation, and the dosage of the H202 is 5 mg/ L, the optimal treatment effect can be obtained by the COD. There were significant differences in the removal of COD and LAS in the four processes including PAC, Al2 (SO4)3-PFS, PAC + Al2 (SO4)3-PFS, H2O2 + Al2 (SO4)3-PFS + PAC. The effect of four processes on the treatment of car-washing wastewater was as follows: H2O2 + Al2 (SO4)3-PFS + PAC PAC + Al2 (SO4)3-PFSPACA12 (S04)3-PFS. In the process of "H2O2+A12(SO4)3-PFS+PAC", the filtration process is increased, and the COD, LAS, chroma and turbidity index value in the filtered water are 22 mg/ L, 0.47 mg/ L,3 times, and 2.3 NTU, respectively, and the water quality standard for water return is achieved (the standard for water quality of water for domestic water use> GJ25.1-89). The effect of the different filtering speed and the thickness of different filter materials has a certain effect on the removal effect of LAS. In this paper, the process of "H2O2 + A12 (SO4)3-PFS + PAC filtration" is used to reduce the concentration of COD, LAS, chromaticity and turbidity, and the water quality of effluent reaches the standard of water return, and provides reference for engineering practice.
【學位授予單位】：昆明理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：X799
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