本文關(guān)鍵詞：好氧顆粒污泥的穩(wěn)定性研究應(yīng)用研究　出處：《北京化工大學(xué)》2015年碩士論文　論文類(lèi)型：學(xué)位論文

  更多相關(guān)文章： 好氧顆粒污泥 穩(wěn)定性 降解能力 苯胺 儲(chǔ)存和恢復(fù)

【摘要】：近幾十年來(lái),由于工業(yè)化和人口爆炸,水資源短缺以及水體污染問(wèn)題日益嚴(yán)峻。其中,水污染問(wèn)題可以通過(guò)各種廢水處理技術(shù)得到解決。然而普遍使用的廢水生物處理方法存在著剩余污泥量大、占地面積大等問(wèn)題。好氧顆粒污泥技術(shù)很大程度上彌補(bǔ)了傳統(tǒng)活性污泥法的缺陷,它結(jié)構(gòu)緊湊、沉降性能好、微生物相豐富。但是,在長(zhǎng)期運(yùn)行過(guò)程中好氧顆粒的穩(wěn)定性阻礙了這項(xiàng)技術(shù)的發(fā)展和應(yīng)用。工業(yè)廢水中的一些物質(zhì)如重金屬、抗生素、無(wú)機(jī)鹽等會(huì)對(duì)顆粒的穩(wěn)定性造成影響；儲(chǔ)存和恢復(fù)過(guò)程運(yùn)行條件的變化也可能引起好氧顆粒穩(wěn)定性的改變。因而,在實(shí)際應(yīng)用中的好氧顆粒污泥的穩(wěn)定性仍有待探究。本論文由好氧顆粒污泥的穩(wěn)定性出發(fā),從污泥濃度、SVI、SOUR、菌群結(jié)構(gòu)的變化及其對(duì)于COD和苯胺的處理效果等方面,分別探討了其在含有苯胺的模擬工業(yè)廢水中、在儲(chǔ)存和活性恢復(fù)過(guò)程中以及在高鹽環(huán)境中的穩(wěn)定性。實(shí)驗(yàn)表明,在10～500mg·L-1的苯胺首次添加的時(shí)候,好氧顆粒的污泥濃度可從5700mg·L-1下降到3600mg·L-1,COD去除率由95%下降至80%甚至50%,其活性會(huì)受到一定程度的抑制。但是由于苯胺的逐漸添加引起了構(gòu)成顆粒中微生物菌群的變化,顆粒很快適應(yīng)了底物變化,抑制作用逐漸緩解。當(dāng)進(jìn)水中添加的苯胺濃度為10～300mg·L-1時(shí),具有生物降解能力的菌種開(kāi)始出現(xiàn)并逐漸聚集在顆粒上,顆粒中的優(yōu)勢(shì)菌種發(fā)生變化,顆粒對(duì)于污染物的去除效果也明顯增強(qiáng)。6h后,苯胺與COD的去除率均可達(dá)到90%以上。隨著苯胺濃度的增加,顆粒長(zhǎng)得更加密實(shí),沉降得更迅速,其SVI甚至可以達(dá)到35mL.g-1,沉降速度達(dá)到41.56m·h-1。并且,好氧顆粒污泥在為期一個(gè)月的儲(chǔ)存過(guò)程中,其性質(zhì)會(huì)有一定下降,且冰箱內(nèi)(4℃)的儲(chǔ)存效果略?xún)?yōu)于室溫下(20℃)。但僅經(jīng)過(guò)六個(gè)批次的恢復(fù),除氨氮外,其他污染物的去除都可以基本接近儲(chǔ)存前的水平。此外,SBR系統(tǒng)內(nèi)高于2.0g·L-1的鹽濃度會(huì)影響好氧顆粒污泥的穩(wěn)定性。
[Abstract]:In recent decades, due to industrialization and population explosion, water shortage and water pollution are becoming more and more serious. The problem of water pollution can be solved by a variety of wastewater treatment technologies. However, there is a large amount of excess sludge in the commonly used biological wastewater treatment methods. Aerobic granular sludge technology to a large extent to make up for the traditional activated sludge process defects, it has a compact structure, good settling performance, microbe rich, but. The stability of aerobic particles during long-term operation hinders the development and application of this technology. Some substances in industrial wastewater such as heavy metals antibiotics inorganic salts and so on will affect the stability of the particles. Changes in operating conditions during storage and recovery may also lead to changes in the stability of aerobic particles. The stability of aerobic granular sludge in practical application is still to be explored. This paper starts from the stability of aerobic granular sludge, and starts from the concentration of sludge. The change of microflora structure and its effect on the treatment of COD and aniline were discussed respectively in the simulated industrial wastewater containing aniline. The stability of aniline during storage and activity recovery, and in high salt environment. The experiment showed that the aniline was added for the first time at 10 ~ 500mg 路L ~ (-1) of aniline. The sludge concentration of aerobic granules can be reduced from 5700mg 路L -1 to 3600mg 路L -1 from 95% to 80% or even 50%. Its activity will be inhibited to some extent, but because of the gradual addition of aniline caused the changes of microbial flora in the particles, the particles quickly adapt to the changes of substrate. When the concentration of aniline in the influent was 10 ~ 300mg 路L ~ (-1), the biodegradable bacteria began to appear and gradually accumulated on the particles. The removal rate of aniline and COD were all above 90% after the removal of pollutants was obviously enhanced. The removal rate of aniline and COD reached more than 90% with the increase of aniline concentration. The particles grow more dense and settle more rapidly, their SVI can even reach 35mL 路g-1, and the settling velocity can reach 41.56m 路h-1.And. During the one-month storage process, the properties of aerobic granular sludge will decrease to some extent, and the storage effect of aerobic granular sludge is slightly better than that of 20 鈩，

本文編號(hào)：1427552