本文關(guān)鍵詞： 厭氧折流板反應(yīng)器 疫病動物尸骸廢水 產(chǎn)酸特性 產(chǎn)甲烷特性 高溫厭氧　出處：《華南理工大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

【摘要】：疫病動物尸骸廢水是一種高濃度有機(jī)廢水,其厭氧降解過程中低分子有機(jī)酸的積累類型與積累水平對甲烷產(chǎn)量有較大影響,為實現(xiàn)疫病動物尸骸廢水的高效厭氧生物降解及甲烷產(chǎn)率最大化的目標(biāo),本實驗采用三格室厭氧折流板反應(yīng)器(ABR)處理疫病動物尸骸廢水,對高濃度有機(jī)廢水厭氧降解效率的共性限制性因素進(jìn)行研究,研究不同進(jìn)水有機(jī)負(fù)荷、水力停留時間和溫度對厭氧過程中產(chǎn)酸及產(chǎn)甲烷特性的影響,主要的研究結(jié)果如下:(1)不同進(jìn)水有機(jī)負(fù)荷對ABR處理疫病動物尸骸廢水的產(chǎn)酸及產(chǎn)甲烷特性的影響研究表明:進(jìn)水有機(jī)負(fù)荷由0.9 g/(L·d)升至8.1 g/(L·d)時,COD最終去除率達(dá)87%以上;負(fù)荷進(jìn)一步提高至11.9 g/(L·d)時,各格室中最終VFAs積累總量分別達(dá)到4320、3420和2510 mg/L,COD去除率降至61%。反應(yīng)器內(nèi)主要產(chǎn)酸類型為乙酸型,其次為丙酸和丁酸,隨著進(jìn)水負(fù)荷的提高,逐漸出現(xiàn)少量異戊酸、戊酸、己酸和異己酸。乙酸平均百分含量隨負(fù)荷的升高而降低,丙酸和丁酸則反之;當(dāng)進(jìn)水負(fù)荷為4.6 g/(L·d)時,處理效果和甲烷產(chǎn)率最優(yōu),三個格室甲烷產(chǎn)率分別達(dá)到最大值:0.33、0.32和0.33LCH4/gCOD,當(dāng)負(fù)荷高于8.1 g/(L·d)時,總VFAs、丙酸和丁酸的積累成為厭氧產(chǎn)甲烷過程的抑制因素。(2)不同水力停留時間(HRT)對ABR處理疫病動物尸骸廢水的產(chǎn)酸及產(chǎn)甲烷特性的影響研究表明:HRT分別為4d、2d、1d、1/2d和1/4d時,ABR對COD的去除率最終穩(wěn)定在94%、95%、89%、53%和28%,出水堿度含量分別為4523、4154、3465、1844和727 mg/L。HRT小于1/2d時,水力沖擊負(fù)荷對反應(yīng)器運(yùn)行效果造成明顯的影響;ABR最終VFAs積累量分別為287、458、699、2189和3926 mg/L,三個格室VFAs累積量均隨HRT的降低而增加;當(dāng)HRT為1d和2d時,處理效果和甲烷產(chǎn)率最優(yōu):格室一、二的甲烷產(chǎn)率在HRT為2d時達(dá)到最大值,分別為0.307和0.321 LCH4/gCOD,格室三的甲烷產(chǎn)率在HRT為1d時達(dá)到最大值,為0.330 LCH4/gCOD;格室一的輔酶F420含量在HRT為2d時達(dá)到最大值,其值為0.504μmol/gVSS,而格室二、三則在HRT為1d時達(dá)到最大,分別為0.604和0.665μmol/gVSS,HRT小于1/2d時,各格室甲烷產(chǎn)率急劇下降,三個格室F420在HRT為1/4d時分別降至0.045、0.065和0.109μmol/gVSS,產(chǎn)甲烷活性受到嚴(yán)重的抑制;各格室污泥的EPS中蛋白質(zhì)含量遠(yuǎn)大于多糖含量,HRT降至1/2d和1/4d時,格室二、三中蛋白質(zhì)和多糖含量明顯增加,而格室一則在HRT為1/4d時,蛋白質(zhì)和多糖明顯增加。EPS中m(蛋白質(zhì))/m(多糖)大體上隨HRT降低而呈現(xiàn)降低趨勢,HRT降低,細(xì)胞分泌的EPS增加。(3)高溫ABR反應(yīng)器的啟動研究表明:采用直接升溫的方式啟動厭氧ABR反應(yīng)器,運(yùn)行70天后,ABR的COD去除率僅為17%,三個格室VFAs積累量分別為4435、4276和4097mg/L,格室二、三內(nèi)大量微生物死亡,反應(yīng)器啟動失敗;采用逐步升溫中溫厭氧體系的方式啟動高溫厭氧ABR反應(yīng),運(yùn)行50d后,COD去除率達(dá)到80%,三個格室VFA積累量分別為3148、1175和835mg/L,高溫ABR反應(yīng)器啟動成功。(4)不同溫度對ABR處理疫病動物尸骸廢水的產(chǎn)酸及產(chǎn)甲烷特性的影響研究表明:高溫ABR反應(yīng)器運(yùn)行效果高于中溫反應(yīng)器,主要體現(xiàn)在:相應(yīng)格室中,高溫ABR的COD去除效率為92%,而中溫則為86%。高溫ABR反應(yīng)器較中溫反應(yīng)器可分解更多的蛋白質(zhì),產(chǎn)生更多的堿度,高溫ABR中三個格室最終堿度含量為2153、3634和4513 mg/L,而中溫ABR反應(yīng)器中堿度含量分別為1792、3145和4045 mg/L。高溫ABR各格室內(nèi)VFAs積累量明顯低于中溫反應(yīng)器,高溫ABR中三個格室的最終VFAs積累量分別為2814mg/L、1150mg/L和329 mg/L,中溫ABR中則分別為3028mg/L、1743 mg/L和809 mg/L。高溫反應(yīng)中各格室的甲烷產(chǎn)率略高于中溫反應(yīng)器,其值分別為0.26、0.331和0.336 LCH4/gCOD,中溫ABR中則分別為0.251、0.31和0.321 LCH4/gCOD。高溫ABR中各格室的污泥的F420含量均明顯高于中溫反應(yīng)器,分別為0.440、0.652和0.781μmol/gMLVSS,中溫ABR中則分別為0.393、0.604和0.665μmol/gMLVSS。
[Abstract]:Disease animal bones wastewater is a high concentration organic wastewater, and the accumulation level of accumulation types on anaerobic degradation of low molecular organic acids have great influence on methane production, to achieve the maximum of animal diseases remains wastewater anaerobic biodegradation and methane yield, this experiment adopts three compartment anaerobic baffled reactor (ABR) treatment of animal diseases remains of wastewater of high concentration organic wastewater anaerobic degradation efficiency of the common restriction factors, study the different influent organic loading, hydraulic retention time and temperature on the anaerobic acidogenic process and influence of methane production characteristics, the main results are as follows: (1) effects of different influent organic acid production load on the ABR treatment of animal diseases remains of wastewater and methane production characteristics show that the influent organic loading from 0.9 g/ (L - D) to 8.1 g/ (L - D), the COD removal rate of 87% to On load; further increased to 11.9 g/ (L - D), each compartment in the final total accumulation reached 43203420 VFAs and 2510 mg/L, the removal rate of COD to 61%. in the reactor mainly acid into acetic acid, followed by propionic acid and butyric acid, with the increase of load water, is a small amount of isovaleric acid gradually, pentanoic acid, caproic acid and acetic acid. The average alien percentage decreases with the load increasing, propionic acid and butyric acid and vice versa; when the water load was 4.6 g/ (L - D), the treatment effect and the methane yield optimal, three compartment methane yield reached the maximum value: 0.33,0.32 and 0.33LCH4/gCOD, when the load is higher than 8.1 g/ (L - D), total VFAs, propionic acid and butyric acid accumulation become inhibitory factors of anaerobic process. (2) different hydraulic retention time (HRT) showed that the effect of ABR acid production wastewater and treatment of animal diseases remains the characteristics of methane generation: HRT respectively 4D, 2D, 1D. 1/2 D and 1/4d ABR, the removal rate of COD remained at 94%, 95%, 89%, 53% and 28%, the effluent alkalinity content were 4523415434651844 and 727 mg/L.HRT is less than 1/2d, the hydraulic shock load caused obvious effects on the operating efficiency of the reactor; the final ABR VFAs accumulation were 2874586992189 and 3926 mg/L, three standard room VFAs accumulation were increased with the decrease of HRT; when the HRT is 1D and 2D, the treatment effect and the methane yield optimal: geocell, methane yield of two in HRT 2D reached the maximum value, respectively 0.307 and 0.321 LCH4/gCOD, cell methane yield of three in HRT 1D the maximum value is 0.330 LCH4/gCOD; cell content of coenzyme F420 in a HRT 2D reached the maximum value, its value is 0.504 mol/gVSS, and two in the three compartment, HRT reached the maximum at 1D, respectively 0.604 and 0.665 mol/gVSS, HRT is less than 1/2d, the methane yield in each compartment sharp Drop, three compartment F420 to 0.045,0.065 and 0.109 mol/gVSS respectively in HRT 1/4d, methanogenic activity was severely inhibited; the protein content in each compartment of the sludge in EPS is far greater than the content of polysaccharide, HRT to 1/2d and 1/4d, standard room two, third protein and polysaccharide content increased significantly. And a compartment in the HRT of 1/4d, protein and polysaccharide significantly increased in.EPS (M protein) /m (polysaccharide) decreased substantially with the decrease of HRT and decreased, HRT cell secretion of EPS is increased. (3) study on the start temperature of ABR reactor showed that using direct heating start the ABR anaerobic reactor, 70 days after ABR, the removal rate of COD is only 17%, three compartment VFAs accumulation were 44354276 and 4097mg/L, standard room two, three in a large number of microbial death, reactor start-up failure; the gradual warming of mesophilic anaerobic system start high temperature anaerobic reaction ABR, After running 50D, COD removal rate reached 80%, three compartment VFA accumulation were 31481175 and 835mg/L, ABR high temperature reactor started successfully. (4) study on the effects of different temperature on ABR acid production wastewater treatment of animal diseases of bones and methanogenic characteristics show that the running effect of high temperature ABR reactor is higher than the temperature response is mainly reflected in the corresponding chamber, high temperature ABR COD removal efficiency is 92%, and the temperature is 86%. high temperature ABR reactor is temperature in the reactor can be decomposed more protein, produce more alkalinity, three chambers in high temperature ABR final alkalinity content of 21533634 and 4513 mg/L, and the alkalinity the content of ABR in temperature in the reactor were 17923145 and 4045 mg/L. high temperature accumulation of ABR VFAs was significantly lower than that in the case of indoor temperature reactor, the final VFAs three lattice in high temperature ABR room accumulation were 2814mg/L, 1150mg/L and mg/L in 329, ABR in temperature were 302 8mg/L, the methane yield in each compartment of 1743 mg/L and 809 mg/L. temperature is slightly higher than that of temperature in the reactor, the values were 0.26,0.331 and 0.336 LCH4/gCOD, the content of F420 in ABR medium temperature respectively in each compartment of 0.251,0.31 and 0.321 LCH4/gCOD. in high temperature ABR sludge were significantly higher than that of temperature in the reactor, respectively. 0.440,0.652 and 0.781 mol/gMLVSS, the temperature in ABR is respectively 0.393,0.604 and 0.665 mol/gMLVSS.

【學(xué)位授予單位】：華南理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：X713

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