發(fā)布時(shí)間：2018-01-11 05:17

  本文關(guān)鍵詞：微壓內(nèi)循環(huán)反應(yīng)器處理城市污水效能及污泥特性研究　出處：《長(zhǎng)春工程學(xué)院》2017年碩士論文　論文類(lèi)型：學(xué)位論文

  更多相關(guān)文章： 微壓內(nèi)循環(huán)反應(yīng)器 城市污水 處理效果 污泥特性

【摘要】：微壓內(nèi)循環(huán)多生物相城市污水處理技術(shù)作為一種新型污水處理技術(shù),在結(jié)構(gòu)及曝氣方式上都不同于傳統(tǒng)污水處理工藝,通過(guò)單側(cè)式曝氣裝置形成循環(huán)流態(tài),構(gòu)建出多氧區(qū)域?qū)崿F(xiàn)同步脫氮除磷的效果。本文是基于微壓內(nèi)循環(huán)反應(yīng)器對(duì)實(shí)際城市污水進(jìn)行的試驗(yàn)研究,該套試驗(yàn)裝置處理水量為290 m3/d,達(dá)到了中試試驗(yàn)規(guī)模,具體試驗(yàn)過(guò)程包括了試驗(yàn)的啟動(dòng)、調(diào)試以及穩(wěn)定運(yùn)行,并對(duì)污染物的去除效果及污泥特性進(jìn)行分析,根據(jù)4個(gè)月的運(yùn)行結(jié)果得到如下主要結(jié)論:(1)試驗(yàn)采用污水廠(chǎng)污泥直接培馴啟動(dòng),進(jìn)水量為12.10m3/h,回流比為100%,MLSS濃度保持在4000mg/L左右,氣水比為3.5:1,HRT采用8h,對(duì)COD、NH_4~+-N、TP、SS的平均去除效率分別達(dá)到82%、97%、88%、78%,達(dá)到了預(yù)期的處理效果,中試系統(tǒng)調(diào)試成功;(2)進(jìn)入穩(wěn)定運(yùn)行階段,試驗(yàn)裝置的工藝參數(shù)為MLSS=4500~5000mg/L,進(jìn)水量Q=10m3/h,氣水比為4.25:1,HRT=9.6h,回流比R=100%,污泥齡SRT=24d,出口DO濃度在1.5mg/L以上,中心DO濃度在0~0.1mg/L。在此狀態(tài)下,試驗(yàn)裝置出水的COD、NH_4~+-N、TN、TP、SS濃度最高分別為25mg/L、4.4mg/L、14.7mg/L、0.49mg/L、30mg/L,均滿(mǎn)足《城鎮(zhèn)污水處理廠(chǎng)污染物排放標(biāo)準(zhǔn)》(GB18918—2002)的排放標(biāo)準(zhǔn),其中COD、NH_4~+-N、TN、TP都達(dá)到了一級(jí)A標(biāo)準(zhǔn);(3)中試系統(tǒng)體現(xiàn)出高有機(jī)物去除能力及抗沖擊能力強(qiáng)的特點(diǎn)。由于進(jìn)水COD濃度較低,試驗(yàn)裝置內(nèi)微生物菌群都保持在低有機(jī)負(fù)荷狀態(tài),該狀態(tài)下的活性污泥能使出水COD濃度降至30mg/L以下,具有高有機(jī)物去除的能力。并且出現(xiàn)停水、停電、降溫等外部沖擊,試驗(yàn)裝置對(duì)于SS及COD的去除率仍能達(dá)到80%以上,表明裝置對(duì)進(jìn)水SS及COD濃度變化具有較強(qiáng)的抗沖擊負(fù)荷能力;但運(yùn)行過(guò)程中的外界因素變化會(huì)影響脫氮除磷的效果;(4)當(dāng)試驗(yàn)裝置運(yùn)行水溫在12.5℃以上時(shí),污泥的胞外聚合物、SVI值、脫氫酶活性及比耗氧速率均能顯示出此階段活性污泥具有較強(qiáng)的新陳代謝能力及較好的生物活性。隨水溫從12.5℃降低的過(guò)程,污泥的SVI上升趨勢(shì)逐漸變緩;胞外聚合物呈先降后升,再降再升的趨勢(shì);脫氫酶活性下降趨勢(shì)趨于平緩;污泥比耗氧速率處于下降速度加快的狀態(tài),表明降溫對(duì)于微生物活性的影響較強(qiáng)。且在水溫從10℃降至9℃的過(guò)程中,污泥活性出現(xiàn)上升的現(xiàn)象。
[Abstract]:As a new sewage treatment technology, micro-pressure internal circulation multi-phase municipal sewage treatment technology is different from the traditional wastewater treatment technology in structure and aeration mode. The effect of simultaneous denitrification and phosphorus removal in a multi-oxygen region was constructed. The experimental study on the actual municipal wastewater was carried out based on the micro-pressure internal circulation reactor. The water treatment capacity of the plant was 290m3 / d. The scale of the pilot test is reached. The concrete test process includes the start-up, debugging and stable operation of the test, and the removal effect of pollutants and the characteristics of sludge are analyzed. According to the results of four months' operation, the main conclusions are as follows: 1) the sewage sludge was trained directly to start the experiment. The influent rate was 12.10 m3 / h and the reflux ratio was 100%. The concentration of MLSS was about 4 000 mg / L, the ratio of gas to water was 3. 5: 1. HRT was used for 8 hours. The average removal efficiency of SS reached 82 / 97, respectively, and reached the expected treatment effect. The pilot system was successfully debugged. The process parameters of the test device are MLSS 4500000 mg / L, water quantity 10 m3 / h, and gas-water ratio 4.25: 1. (2) in the stable operation stage, the process parameters are MLSS 4500 mg / L, Q = 10 m3 / h, and the ratio of gas to water is 4.25: 1. The sludge age was 24 days, the concentration of do in outlet was more than 1.5 mg / L, and the concentration of do in center was 0.1 mg / L. The highest concentration of CODN NH4 ~ -NX TNN TPSS in the effluent of the test plant was 25 mg / L = 4.4 mg / L = 14.7 mg / L = 0.49 mg / L. 30 mg / L, all meet the discharge standard of pollutant discharge standard (GB18918-2002) of the Municipal sewage treatment Plant (GB18918-2002), in which CODN NH4- NN TN. TP reached the first A standard; The pilot-scale test system has the characteristics of high organic removal ability and strong impact resistance. Because of the low influent COD concentration, the microbial flora in the test plant is kept in low organic loading state. The activated sludge under this condition can reduce the COD concentration of effluent to less than 30 mg / L, and has the ability of high organic removal, and the external shocks such as water shutdown, power outage, cooling and so on. The removal rate of SS and COD can still reach more than 80%, which indicates that the device has strong anti-shock load ability to the change of influent SS and COD concentration. However, the change of external factors during operation will affect the effect of nitrogen and phosphorus removal. 4) when the water temperature is above 12.5 鈩，

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