本文選題：升級(jí)改造 + A~2/O工藝��； 參考：《哈爾濱工業(yè)大學(xué)》2015年碩士論文

【摘要】：為了提高城市污水處理廠出水水質(zhì)標(biāo)準(zhǔn),達(dá)道灣污水處理廠對(duì)原有A/O工藝進(jìn)行升級(jí)改造,主要工藝是將廠區(qū)原有的A/O池增加一段缺氧區(qū)改造成A~2/O池,從而將原有二級(jí)出水標(biāo)準(zhǔn)提升成為一級(jí)A出水標(biāo)準(zhǔn)。本課題在對(duì)達(dá)道灣污水處理廠實(shí)際工程進(jìn)行分析調(diào)研的基礎(chǔ)上,提出改造設(shè)計(jì)方案。針對(duì)達(dá)道灣污水廠實(shí)際情況和升級(jí)要求,本研究確定將A/O工藝升級(jí)改造為A~2/O工藝,并根據(jù)一級(jí)A標(biāo)準(zhǔn)要求對(duì)進(jìn)出水水質(zhì)進(jìn)行論證,成功啟動(dòng)A~2/O工藝后,通過檢測(cè)進(jìn)水、出水COD、BOD、氨氮、總氮和總磷等水質(zhì)指標(biāo)對(duì)改造工藝進(jìn)行調(diào)試。在工藝穩(wěn)定運(yùn)行后,出水BOD濃度小于7 mg/L,出水COD濃度平均值為36 mg/L;出水的氨氮濃度為3.14 mg/L;出水總氮濃度為9.45mg/L;總磷平均值為0.42 mg/L,各水質(zhì)指標(biāo)均已達(dá)到國家一級(jí)A標(biāo)準(zhǔn)。與原有工藝相比,有機(jī)物的去除和脫氮除磷效果有了顯著提升,A~2/O工藝穩(wěn)定運(yùn)行,達(dá)道灣污水廠改造升級(jí)得到較好效果。為了進(jìn)一步提高工藝運(yùn)行效果,同時(shí)達(dá)到節(jié)約成本目的,本課題對(duì)改造工藝運(yùn)行參數(shù)進(jìn)行優(yōu)化,混合液內(nèi)回流比從300%降低到250%,污泥回流比降低到75%,A~2/O工藝的污泥齡縮短為15 d,參數(shù)優(yōu)化后最顯著的效果是提高了除磷效率,而有機(jī)物去除效果和脫氮效果也維持在較高水平。同時(shí)混合液內(nèi)回流比、污泥回流比的降低也節(jié)省了運(yùn)行成本。A~2/O工藝具有同步脫氮除磷功效,該工藝有簡(jiǎn)單的構(gòu)造、較短的總水力停留時(shí)間、較低的運(yùn)行費(fèi)用等優(yōu)點(diǎn)。因此,如果提高脫氮除磷功能,傳統(tǒng)活性污泥污水處理廠選擇最佳的工藝就是A~2/O工藝。在實(shí)際應(yīng)用中,對(duì)工藝處理效果進(jìn)行分析,同時(shí)對(duì)運(yùn)行參數(shù)進(jìn)行了優(yōu)化調(diào)控,得到了工藝運(yùn)行的最佳參數(shù),在達(dá)到工藝升級(jí)要求的基礎(chǔ)上,提高了其運(yùn)行效能。同時(shí)為鞍山其它水廠提供有益的參考。
[Abstract]:In order to improve the effluent quality standard of the municipal sewage treatment plant, the original A- / O process was upgraded at the Dadaowan sewage treatment Plant. The main process was to transform the original A- / O pool into an A2 / O pool by adding a section of anoxic zone to the original A- / O pool in the plant area. Thus, the original secondary effluent standard was raised to a class A effluent standard. On the basis of analyzing and investigating the actual project of Dadaowan sewage treatment Plant, this paper puts forward the retrofit design scheme. In view of the actual situation and upgrading requirements of the Dadaowan sewage treatment Plant, this study determined to upgrade the A- / O process to A2 / 2 / O process, and to demonstrate the quality of the incoming and outgoing water according to the requirements of the first class A standard. After successfully starting the A0 / 2 / O process, the inlet water was detected. Water quality indexes such as COD BOD, ammonia nitrogen, total nitrogen and total phosphorus were adjusted. After stable operation, the effluent BOD concentration is less than 7 mg / L, the average effluent COD concentration is 36 mg / L, the effluent ammonia nitrogen concentration is 3.14 mg / L, the effluent total nitrogen concentration is 9.45 mg / L, the average total phosphorus is 0.42 mg / L, each water quality index has reached the national A standard. Compared with the original process, the removal of organic matter and the removal of nitrogen and phosphorus have significantly improved the stable operation of the A2 / O process, and the upgrading of the Dadaowan sewage treatment Plant has achieved better results. In order to further improve the effect of process operation and achieve the purpose of cost saving, this paper optimizes the operation parameters of the revamped process. The reflux ratio in the mixed solution was reduced from 300% to 250 and the sludge reflux ratio to 75 / 2 / O was shortened to 15 days. The most significant effect after parameter optimization was to improve the efficiency of phosphorus removal, while the removal efficiency of organic matter and nitrogen removal was maintained at a higher level. At the same time, the ratio of reflux in mixed liquid and the ratio of sludge reflux are also reduced. The operation cost is also saved. The process has the advantages of simultaneous denitrification and phosphorus removal. The process has the advantages of simple structure, short total hydraulic retention time and low running cost. Therefore, if the denitrification and phosphorus removal function is improved, the traditional activated sludge wastewater treatment plant choose the best process is An 2 / O process. In practical application, the effect of process treatment is analyzed, and the operation parameters are optimized and adjusted, and the optimum parameters of process operation are obtained. On the basis of meeting the requirements of process upgrading, the operation efficiency is improved. At the same time, it provides useful reference for other water plants in Anshan.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：X703

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本文編號(hào)：1786453