本文選題：AMBR　切入點(diǎn)：養(yǎng)殖污水　出處：《寧夏大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：畜禽養(yǎng)殖業(yè)規(guī)�；l(fā)展,造成養(yǎng)殖糞尿和沖洗水急劇增多,生態(tài)環(huán)境保護(hù)形勢(shì)十分嚴(yán)峻,人工檢測(cè)水質(zhì)具有滯后性且耗時(shí)長(zhǎng),存在不達(dá)標(biāo)污水偷排、誤排等現(xiàn)象,因此,采用折流厭氧反應(yīng)器+膜生物反應(yīng)器組合(AMBR)工藝處理養(yǎng)殖污水,分析運(yùn)行過(guò)程中污染物去除特性和效率,并利用BP人工神經(jīng)網(wǎng)絡(luò)預(yù)測(cè)模型,對(duì)AMBR工藝處理養(yǎng)殖污水進(jìn)行模擬,在輸入?yún)?shù)溶解氧(DO)、懸浮物污泥濃度(MLSS)、酸堿度(pH)改變的情況下,對(duì)出水水質(zhì)作出動(dòng)態(tài)預(yù)測(cè)。為畜禽養(yǎng)殖污水高效處理提供行之有效的方法,彌補(bǔ)了人工檢測(cè)產(chǎn)生的滯后性,也為AMBR在高濃度養(yǎng)殖污水處理領(lǐng)域的技術(shù)優(yōu)化及推廣應(yīng)用提供相關(guān)技術(shù)參考,降低畜禽污染程度,保護(hù)生態(tài)文明。主要研究結(jié)果如下:(1)AMBR系統(tǒng)對(duì)化學(xué)需氧量(CODcr)、氨氮(NH3-N)、總氮(TN)、總磷(TP)和懸浮物(SS)的平均去除率分別為94.17%、84.17%、83.37%、41.63%和98.33%,按去除率的大小排列為:SSCODcrNH3-NTNTP。AMBR系統(tǒng)對(duì)于進(jìn)水濃度波動(dòng)較大的指標(biāo)(CODcr:1298.29mg/L～3372.42mg/L,NH3-N:79.35mg/L～207.6mg/L,SS:809.9mg/L～32396.4mg/L)處理效果依然穩(wěn)定良好,體現(xiàn)了 AMBR系統(tǒng)超強(qiáng)的抗沖擊能力和自適應(yīng)調(diào)整恢復(fù)能力。(2)AMBR系統(tǒng)對(duì)CODcr、NH3-N和TN的去除主要依靠生物降解作用,其生物降解貢獻(xiàn)率分別在60%～85%、82%～90%和69.96%～90.44%,由于NH3-N和TN分子較小,能透過(guò)微孔膜組件隨出水排出。系統(tǒng)對(duì)NH3-N的去除主要靠硝化菌硝化作用,以及厭氧氨氧化菌將反硝化產(chǎn)物亞硝酸鹽作為電子受體,將氨氮轉(zhuǎn)化為氮?dú)鈱?shí)現(xiàn)的。對(duì)SS的去除依靠膜系統(tǒng)截留過(guò)濾作用,其貢獻(xiàn)率平均為61.26%,主要由于AMBR膜組件采用膜孔徑為0.1～0.2μm的超濾膜,養(yǎng)殖污水中的膠體、懸浮物SS和高分子有機(jī)物等粒徑大于0.2μm則均被膜的物理篩濾作用截留。(3)對(duì)于TP的去除率明顯低于其他水質(zhì)指標(biāo),可能存在的原因有兩方面:①系統(tǒng)內(nèi)部環(huán)境被累積的高濃度有機(jī)物破壞,聚磷菌的碳源供給受到競(jìng)爭(zhēng)抑制,氣化成磷量減小。②缺氧區(qū)DO濃度約為0.45～0.6mg/L,高于厭氧除磷所需溶解氧濃度(DO=0.2mg/L),非聚磷菌繁衍增長(zhǎng)抑制聚磷菌反硝化作用,不利于TP的去除。(4)BP神經(jīng)網(wǎng)絡(luò)出水CODcr、和NH3-N、TN、TP和SS水質(zhì)預(yù)測(cè)的相對(duì)誤差平均值分別為 0.99%、1.67%、0.08%、0.02%和 0.03%,平均絕對(duì)誤差率和分別為 1.01%、2%、8.1%、2.12%和4.99%。綜上可知,BP神經(jīng)預(yù)測(cè)模型對(duì)于上述指標(biāo)都具有良好的適應(yīng)性和準(zhǔn)確性,其中性能最佳的是CODcr。(5)當(dāng)DO、pH(不超過(guò)pH=8)、MLSS增加時(shí)有利于出水TN、NH3-N、和SS的去除;運(yùn)行條件調(diào)整到DO=3mg/L,MLSS=16000 mg/L,pH=7時(shí),畜禽養(yǎng)殖污水處理系統(tǒng)處理凈化程度最大化,處理效果達(dá)到最佳;由于CODcr、NH3-N和TN的去除率在MLSS從10000增加到16000過(guò)程中增長(zhǎng)緩慢,本著節(jié)約污水處理廠投入資金且保證污水處理效果的原則,MLSS控制到10000～12000能夠達(dá)到CODcrCODcr、NH3-N和TN的最佳去除效果。
[Abstract]:The large-scale development of livestock and poultry breeding industry has resulted in a sharp increase in feces, urine and washing water, the ecological environment protection situation is very severe, the artificial detection of water quality has lag and consuming time, there are some phenomena, such as substandard sewage stealing discharge, wrong discharge, etc., therefore, Culture wastewater was treated with baffled anaerobic reactor membrane bioreactor (MBR) process. The pollutant removal characteristics and efficiency were analyzed. BP artificial neural network model was used to simulate the treatment of aquaculture wastewater by AMBR process. Under the condition of changing the input parameters of do, MLSS, pH and pH of suspended sludge, the dynamic prediction of effluent quality is made, which provides an effective method for efficient treatment of livestock and poultry wastewater, and makes up for the lag produced by manual detection. It also provides relevant technical reference for the technical optimization and application of AMBR in the field of high concentration aquaculture wastewater treatment, and reduces the pollution degree of livestock and poultry. Conservation of ecological civilization. The main results of the study are as follows: the average removal rates of the chemical oxygen demand (COD), NH _ 3-N (NH _ 3-N), total nitrogen (TNN), total phosphorus (TP) and suspended solids (SSs) of the 1 / 1 / AMBR system are 94.1717 / 84.171.37% and 98.33%, respectively, and the removal rates are in the order of: SSCcrNH _ 3-NTNTP.AMBR system for influent concentration. A highly volatile indicator, CODCR: 1298.29 mg / L, 3372.42 mg / L, NH3-N: 79.35 mg / L, 207.6 mg / L, SS: 809.9 mg / L 32396.4 mg / L) treatment is still stable and good. The results show that the removal of NH3-N and TN by AMBR system mainly depends on biodegradation, and the contribution rate of biodegradation is in the range of 600.8585% and 69.96% / 90.440.44, respectively, because the NH3-N and TN molecules are small, and the effect of biodegradation on the removal of NH3-N and TN of the system is mainly dependent on the biodegradation of NH3-N and TN, and the biodegradability of the system is 69.96% and 90.44%, respectively, because of the small NH3-N and TN molecules. The removal of NH3-N by the system mainly depends on nitrification by nitrifying bacteria, and nitrite, the denitrification product, is used as the electron receptor by anaerobic ammonia-oxidizing bacteria. Ammonia nitrogen was converted to nitrogen gas. The removal of SS depended on the retention and filtration of membrane system. The contribution rate of SS was 61.26 on average. The main reason was that the AMBR membrane module adopted ultrafiltration membrane with a membrane pore diameter of 0.1 渭 m and 0.2 渭 m, and the colloid in the aquiculture wastewater. The removal rate of TP was obviously lower than that of other water quality indexes when the suspended solids SS and macromolecule organic particles were larger than 0.2 渭 m in the physical sieve and filtration action of membrane, the removal rate of TP was obviously lower than that of other water quality indexes. There are two possible reasons for this: the internal environment of the system has been destroyed by the accumulation of high concentrations of organic matter, and the supply of carbon sources of phosphorus accumulating bacteria has been inhibited by competition. The concentration of do in anoxic region was about 0.45 ~ 0.6mg / L, which was higher than that of dissolved oxygen concentration (do) 0.2mg / L ~ (-1) for anaerobic phosphorus removal. The proliferation and growth of non-phosphorus accumulating bacteria inhibited denitrification of phosphorus accumulating bacteria. The average relative error of water quality prediction of TP and NH _ 3-N _ N _ N _ N _ N _ N _ T _ N _ TP and SS was 0.99 ~ 1.67 ~ 0.08% and 0.03%, respectively. The average absolute error rate and the average absolute error rate were 1.01 ~ 2% and 8.12% and 4.99%, respectively. In summary, it can be seen that the BP neural prediction model is suitable for the above mentioned fingers, and the average absolute error rate is 0.02% and 0.03% respectively. In summary, we can see that the BP neural prediction model is suitable for the above mentioned fingers. All of them have good adaptability and accuracy. The best performance was CODcr.5) when the pH of DOA (no more than pH 8) was increased, the removal of TNNH _ 3-N and SS was favorable, and the operating conditions were adjusted to 3 mg / L MLSS = 16000 mg 路L ~ (-1) pH = 7:00, the purification degree of livestock and poultry wastewater treatment system was maximized and the treatment effect was the best. Because the removal rate of COD _ (Cr) NH _ 3-N and TN increased slowly in the process of increasing MLSS from 10000 to 16000, the best removal efficiency of COD _ (Cr) _ (Cr) NH _ 3-N and TN could be achieved by using the principle of saving the investment of wastewater treatment plant and ensuring the sewage treatment effect by controlling the COD _ (Cr) NH _ 3-N and TN to 10 000 ~ 12000.
【學(xué)位授予單位】：寧夏大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：X713

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本文編號(hào)：1600889