【摘要】：針對(duì)線(xiàn)路板高濃度有機(jī)油墨廢水的處理,傳統(tǒng)酸析/廢水混合生物處理工藝普遍存在有機(jī)物去除效率低、出水可生化性差、硝化作用受抑、出水化學(xué)需氧量(COD)不達(dá)標(biāo)等問(wèn)題。隨著線(xiàn)路板廢水排放標(biāo)準(zhǔn)中總氮考核指標(biāo)的進(jìn)一步納入,常用好氧生物處理法,如接觸氧化法、序批式活性污泥法(SBR)等更使得低效脫氮問(wèn)題日漸凸顯�；诖�,本文擬通過(guò)多級(jí)物化處理以增強(qiáng)油墨廢水中有機(jī)物的去除率,提高其可生化性;同時(shí),結(jié)合前置反硝化-曝氣生物濾池(AAS-BAF)生物處理工藝,在實(shí)現(xiàn)油墨廢水有機(jī)物達(dá)標(biāo)排放的同時(shí),提高其脫氮效果。多級(jí)物化處理基于先破乳后氧化的處理原則,通過(guò)考察對(duì)比不同工藝對(duì)油墨廢水的處理效果,優(yōu)選確定具體的破乳及氧化工藝。試驗(yàn)結(jié)果表明:酸析處理具有較好的破乳效果,在p H=3條件下,COD、色度和固體懸浮物(SS)的去除率分別達(dá)到69%、90%和100%,而混凝處理僅表現(xiàn)為對(duì)SS的去除。對(duì)于氧化處理工藝,微電解和Fenton工藝均有利于廢水COD的去除和可生化性的提高,酸析處理廢水經(jīng)其處理后COD值可分別下降21%和24%,可生化性可由0.04分別提高至0.26和0.39。針對(duì)“酸析+微電解”和“酸析+Fenton”兩種工藝處理后的廢水進(jìn)行生物處理試驗(yàn),結(jié)合處理效果和經(jīng)濟(jì)性,確定最終處理工藝。試驗(yàn)結(jié)果表明,相比于僅采用酸析處理后的廢水,“酸析+微電解”和“酸析+Fenton”兩種處理工藝對(duì)反硝化脫氮無(wú)明顯影響,但硝化效果均可明顯提高,硝化速率可由4.54 mg/h分別提高到6.32 mg/h和7.66 mg/h。經(jīng)濟(jì)性分析表明,“酸析+微電解”處理費(fèi)用為4.71元/噸水,遠(yuǎn)低于“酸析+Fenton”工藝的11.66元/噸水。根據(jù)上述結(jié)論,優(yōu)選“酸析+微電解”作為油墨廢水處理工藝。通過(guò)連續(xù)動(dòng)態(tài)試驗(yàn),考察了“酸析+微電解+AAS-BAF”工藝對(duì)油墨廢水的處理效果,結(jié)果表明:在投加150 mg COD/L甲醇作為外加碳源的條件下,該工藝對(duì)COD、氨氮和TN均具有很好的去除效果,出水平均含量分別為55 mg/L、1.44 mg/L和12.82 mg/L,符合相應(yīng)的排放標(biāo)準(zhǔn)。
[Abstract]:In view of the treatment of high concentration organic ink wastewater from circuit board, the organic matter removal efficiency is low, the effluent biodegradability is poor and nitrification is inhibited in the traditional mixed biological treatment process of acid precipitation / wastewater. The chemical oxygen demand of effluent (COD) is not up to standard and so on. With the further inclusion of total nitrogen assessment index in circuit board wastewater discharge standard, aerobic biological treatment methods, such as contact oxidation method, sequencing batch activated sludge process (SBR) and so on, make the problem of inefficient nitrogen removal more and more prominent. Based on this, this paper intends to enhance the removal rate of organic matter in ink wastewater and improve its biodegradability through multi-stage physicochemical treatment. At the same time, combined with pre-denitrification-biological aerated filter (AAS-BAF) biological treatment process, while achieving the standard discharge of organic matter in ink wastewater, the nitrogen removal efficiency was improved. The multi-stage physicochemical treatment is based on the principle of first demulsification and then oxidation. By comparing the effects of different processes on the treatment of ink wastewater, the specific demulsification and oxidation processes are optimized and determined. The experimental results show that the acid precipitation treatment has a good demulsification effect. Under the condition of pH 鈮，

本文編號(hào)：2473279