本文關鍵詞：好氧顆粒污泥的穩(wěn)定性研究應用研究　出處：《北京化工大學》2015年碩士論文　論文類型：學位論文

  更多相關文章： 好氧顆粒污泥 穩(wěn)定性 降解能力 苯胺 儲存和恢復

【摘要】：近幾十年來,由于工業(yè)化和人口爆炸,水資源短缺以及水體污染問題日益嚴峻。其中,水污染問題可以通過各種廢水處理技術得到解決。然而普遍使用的廢水生物處理方法存在著剩余污泥量大、占地面積大等問題。好氧顆粒污泥技術很大程度上彌補了傳統(tǒng)活性污泥法的缺陷,它結構緊湊、沉降性能好、微生物相豐富。但是,在長期運行過程中好氧顆粒的穩(wěn)定性阻礙了這項技術的發(fā)展和應用。工業(yè)廢水中的一些物質如重金屬、抗生素、無機鹽等會對顆粒的穩(wěn)定性造成影響；儲存和恢復過程運行條件的變化也可能引起好氧顆粒穩(wěn)定性的改變。因而,在實際應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、菌群結構的變化及其對于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、在儲存和活性恢復過程中以及在高鹽環(huán)境中的穩(wěn)定性。實驗表明,在10～500mg·L-1的苯胺首次添加的時候,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%,其活性會受到一定程度的抑制。但是由于苯胺的逐漸添加引起了構成顆粒中微生物菌群的變化,顆粒很快適應了底物變化,抑制作用逐漸緩解。當進水中添加的苯胺濃度為10～300mg·L-1時,具有生物降解能力的菌種開始出現并逐漸聚集在顆粒上,顆粒中的優(yōu)勢菌種發(fā)生變化,顆粒對于污染物的去除效果也明顯增強。6h后,苯胺與COD的去除率均可達到90%以上。隨著苯胺濃度的增加,顆粒長得更加密實,沉降得更迅速,其SVI甚至可以達到35mL.g-1,沉降速度達到41.56m·h-1。并且,好氧顆粒污泥在為期一個月的儲存過程中,其性質會有一定下降,且冰箱內(4℃)的儲存效果略優(yōu)于室溫下(20℃)。但僅經過六個批次的恢復,除氨氮外,其他污染物的去除都可以基本接近儲存前的水平。此外,SBR系統(tǒng)內高于2.0g·L-1的鹽濃度會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，

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