本文選題：乳化液廢水 + Fenton氧化��； 參考：《北京交通大學(xué)》2017年碩士論文

【摘要】：乳化液廢水成分復(fù)雜(主要含油、乳化劑和表面活性劑),有機(jī)物含量高,油含量高,性質(zhì)穩(wěn)定,難降解,能長期滯留在水體和土壤中,污染強(qiáng)度大。因此,對乳化液廢水進(jìn)行零排放/回用深度處理具有重要意義。雙膜技術(shù)作為高效深度處理技術(shù),近年來在廢水回用中得到廣泛應(yīng)用,然而膜技術(shù)在處理乳化液廢水過程中形成的膜污染制約了它的工業(yè)化應(yīng)用。本研究以北京生態(tài)島物化車間乳化液廢水收集、處理處置為基礎(chǔ),分析乳化液廢水破乳后的水質(zhì)特點(diǎn),通過實(shí)驗(yàn)室小試,研究高級氧化-光合細(xì)菌(PSB)生化組合工藝強(qiáng)化雙膜處理的效果及可行性,并采用動態(tài)超濾-反滲透膜研究了深度回用處理的可行性及穩(wěn)定性。試驗(yàn)首先考察了超聲波、臭氧、Fenton幾種高級氧化技術(shù)對乳化液廢水可生化性的影響,同時探討了提高可生化性效果最佳的Fenton氧化技術(shù)的使用條件;再對Fenton氧化清液進(jìn)行PSB生化處理,探究了光合細(xì)菌的生長規(guī)律及培養(yǎng)條件,考察光照、DO和HRT等條件對光合細(xì)菌處理廢水效果的影響,并通過固定化方法強(qiáng)化光合細(xì)菌的處理;然后利用超濾-反滲透(UF-RO)進(jìn)行深度處理,確定運(yùn)行過程中溫度、壓力、清洗周期等工藝參數(shù),分析雙膜處理效果及膜污染狀況。結(jié)果表明:(1)在提高破乳后的乳化液廢水可生化性的效果上,Fenton氧化超聲波氧化臭氧氧化。Fenton氧化體系不僅能提高廢水的可生化性,還能降解去除廢水中具發(fā)色基團(tuán)的有機(jī)物質(zhì),使出水呈無色。當(dāng)Fenton氧化初始pH為2.5,投加Fe2+為 2500 mg/L,[H202]/[Fe2+](mol/mol)比為 40,反應(yīng) 1 h 后,在 pH 為 9.0～10.0 的條件下靜置沉降,可以使廢水的B/C由0.16提高到0.52,對廢水CODCr的去除率為 60.8%。(2)試驗(yàn)對光合細(xì)菌生長規(guī)律及培養(yǎng)條件進(jìn)行分析,確定了光合細(xì)菌的生長周期為7天左右,菌體的對數(shù)期在培養(yǎng)后的2-4天。對光合細(xì)菌生化處理Fenton氧化清液過程的調(diào)試和優(yōu)化,確定在光照微曝氣條件下,海藻酸鈉包埋的光合細(xì)菌處理具有停留時間短、有機(jī)物降解效率高的效果。將海藻酸鈉包埋的光合細(xì)菌與氧化清液按1:4的比例混合,調(diào)節(jié)混合液pH為7.0～8.0,在30℃恒溫光照微曝氣條件下,當(dāng)水力停留時間為60h時,廢水CODCr去除效果可以達(dá)到73.5%。(3)利用UF-RO處理光合細(xì)菌生化出水,結(jié)果表明運(yùn)行膜污染主要為可逆污染。試驗(yàn)確定了系統(tǒng)運(yùn)行的參數(shù),超濾在進(jìn)水壓力0.1 MPa、進(jìn)水流量1LPM、產(chǎn)水率90%的條件下常溫、恒壓錯流過濾;反滲透在投加40 mg/L高鹽阻垢劑、進(jìn)水流量0.1 LPM、產(chǎn)水率50%的條件下恒速過濾,脫鹽率達(dá)98.1%,硫酸根去除率為97.9%,總硬度去除率為99.5%。(4)以試驗(yàn)結(jié)果為基礎(chǔ),擬定乳化液廢水采用Fenton光合細(xì)菌生化處理,生化出水采用UF-RO處理,組合技術(shù)可行,理效果。出水無色呈中性,CODCr從2224.3 mg/L降為63.7 mg/L,mg/L降至148.6mg/L,出水水質(zhì)基本滿足《再生水用作工業(yè)用(GBT 19923-2005)。
[Abstract]:The composition of emulsion wastewater is complex (main oil, emulsifier and surfactant, organic matter content is high, oil content is high, property is stable, difficult to degrade, can stay in water and soil for a long time, the pollution intensity is high. Therefore, it is of great significance to treat emulsion wastewater with zero discharge / reuse. As a high efficient advanced treatment technology, double membrane technology has been widely used in wastewater reuse in recent years. However, membrane fouling in the treatment of emulsion wastewater has restricted its industrial application. Based on the collection and treatment of emulsion wastewater in Beijing Ecological Island Physico-chemical Workshop, the characteristics of emulsion wastewater after demulsification were analyzed. The effect and feasibility of advanced oxidation-photosynthetic bacteria PSB-biochemistry combination process to enhance the treatment of double membrane were studied, and the feasibility and stability of deep reuse treatment were studied by using dynamic ultrafiltration reverse osmosis membrane. The effects of ultrasonic and ozone Fenton advanced oxidation technologies on the biodegradability of emulsion wastewater were investigated. At the same time, the application conditions of Fenton oxidation technology with the best biodegradability were discussed. Then the PSB biochemical treatment was carried out on the Fenton oxidation liquid, and the growth law and culture conditions of photosynthetic bacteria were studied. The effects of light, do and HRT on the treatment of photosynthetic bacteria wastewater were investigated, and the treatment of photosynthetic bacteria was strengthened by immobilization method. Then the ultrafiltration and reverse osmosis (UF-ROA) were used for advanced treatment to determine the process parameters such as temperature, pressure, cleaning period and so on, and to analyze the effect of double membrane treatment and membrane fouling. The results show that Fenton oxidation ultrasonic oxidation ozone oxidation. Fenton oxidation system can not only improve the biodegradability of wastewater, but also degrade and remove organic substances with chromophore in the emulsion wastewater after demulsification. Make the water colorless. When the initial pH of Fenton oxidation is 2.5, the addition of Fe2 is 2500 mg / L, the ratio of [H202] / [Fe2] mol / mol / mol) is 40, after 1 hour reaction, the sedimentation is static at pH 9.0 ~ 10.0. The B / C of wastewater was increased from 0.16 to 0.52, and the removal rate of CODCr from wastewater was 60.8. The growth rule and culture conditions of photosynthetic bacteria were analyzed. The growth cycle of photosynthetic bacteria was about 7 days, and the logarithmic period of bacteria was 2-4 days after culture. The adjustment and optimization of the process of Fenton oxidation solution by biochemical treatment of photosynthetic bacteria showed that under the condition of light and micro-aeration, the treatment of photosynthetic bacteria embedded with sodium alginate had the effect of short residence time and high degradation efficiency of organic matter. The photosynthetic bacteria entrapped with sodium alginate were mixed with the oxidized liquid at 1:4, and the pH of the mixed solution was adjusted to 7.0 ~ 8.0. Under the condition of 30 鈩，

本文編號：1800823