【正文】 踐，活性污泥工藝已經(jīng)成為一種比較完善的工藝。用常規(guī)手段也已經(jīng)很難在生物學(xué)方面有所突破。 (1) 膜分離技術(shù)的應(yīng)用 用膜分離代替沉淀進(jìn)行泥水分離，可帶來活性污泥工藝的以下變化：①不再存在污泥膨脹問題。雖然膜分離目前還存在易堵塞等方面的問題，但這些問題正逐步得到解 決。為搞清聚磷菌除磷的生化機(jī)理，已開始用分子診斷技術(shù)獲取聚磷菌的遺傳信息。目前正用分子診斷技術(shù)進(jìn)行這些絲狀菌的生物學(xué)定位，以進(jìn)一步準(zhǔn)確了解其特性。 三、本次設(shè)計(jì)工藝流程的選擇及分析 本項(xiàng)目污水處理的特點(diǎn)：（ 1）本次設(shè)計(jì)主要處理城鎮(zhèn)生活污水，污水以有機(jī)污染物為主， BOD/COD= 可生化性好；（ 2）重金屬及其他難以生物降解的有毒有害污染物一般不超標(biāo)；（ 3）污水中主要污染物指標(biāo) BOD、 COD、 SS 都值都比較低。由于氮磷超標(biāo)，處理工藝尚用硝化除磷。本課題選 擇典型的工藝流程，有兩種可供選擇的工藝：1）普通 A/A/O 法處理工藝。兩種工藝經(jīng)過比較，本項(xiàng)目污水處理的特點(diǎn)為： 一、 污水以有機(jī)污染為主， BOD/COD = 〉 ，可生化性 比 較好，重金屬及其他 的 難以生物降解的有毒有害污染物一般不超標(biāo)； 二、 污水中主要污染物指標(biāo) BOD、 COD、 SS 值為典型城市污水值。 針對以上特點(diǎn)，以及出水要求，以采用生化處理最為經(jīng)濟(jì)。 原污水 → 粗格柵 → 污水提升泵房 → 細(xì)格柵 → 沉砂池 → 厭氧池 → 缺氧池 好氧池 → 二沉池 → 接觸池 → 排放 英文翻譯 Oxidize the ditch craft in dirty water handle of application and development CaiZhi 一 jun (Foshan City Shunde District Environmental EngineeringBranch Foshan Guangdong 528000) 【 Abstract】 Setanaerobic, naoxic section Carrous oxidation ditch with biologicla nitrogen and phosphoru sremoval capabilitie, is curren dythe mainstream of city life process of sewage treatment, This article descirbes the structure of Carrousel oxidation ditch, porcess and design problems during the operation and the corresponding solutions． 【 Keywords】 Carrousel； Oxidationditch； Phosphorusnadnitrogenremoval； Structure；Mechanism 1. Foreword Oxidize the ditch( oxidation ditch) again a continuous circulation spirit pond( Continuous loop reactor), is a live and dirty mire method a kind of to the dirty water in ditch handles the craft be researched to manufacture by the hygiene engineering graduateschool of Holland in the 5039。At the same time, the ammonia were too oxidized nitrate with second nitrate, this time, mix with the liquid be placed in the oxygen the spirit machine downstream, after water current be bee by the swift flow appearance of the spirit District oP even flow the appearance, the water current maintainsin theminim umcurrentvelocity,guaranteeingthe liveand dirty mire be placed in the floats the appearance.( average current msl s)Oxldlze microbially the process consumed to fuse theoxygenin thewater,until thevalueofDOdeclinesforzero, mixing with the liquid report the anoxia nitric that turn the function through anoxia area, mix with the liquid enter to have the oxygen area, pleting once system inside, the BOD declines the solution is a continuous process, the nitric turns the function to turn with the versa nitric ~e function ta ke place in same of structural restrict, this kind of oxidize the ditch although can then valid whereabouts BOD, divided by the phosphorus take off the nitrogenous ability ltmrtedt. The Carrousel oxidizes the ditch divideds by the phosphorus takes off the nitrogenous influence factor. Affecting the Carrousel oxidizes the ditch divideds by the phosphoric factor is dirty mire, nitrate density and quality densities research expresses, being total and dirty mire as 11% that a hour biggest phosphorus 4% with deal is its fuck dirty mire deal within live and dirty mire, keep for the the germ physical endowment measures, but when dirty mire over 15 d hour dirty mire the Inside is biggesttocontain theobviousdescentindealIn phosphorus,canning not reach the biggest divideding by the result of phosphorus on the , prolong persistently the dirty mire (for example 20ds,25ds,30ds) is to have no necessary, proper choose to use within the scope of 8~ 15 the same time, high nitrate density with low quality density disadvantage in divided by the process of phosphorus . 4. The Carrousel oxidizes problem and solution methods of the ditch esse. Though the Carrousel oxidizes the ditch has a water fluid matter good, the antipounds at the burthen ability strong, divided by the phosphorus take off the nitrogen efficiency. But, in physically of movement process, still exstts a series of problem. Dirty mire inflation problem When discard the aquatic carbohydrate more, the N, P contains the unbalance of deal, the pH value is low, oxidizing the dirty mire in inside in ditch carries high, fuse the oxygen density the shortage, line up the mire not etc. causes easily dirty mire in germ in form in silk inflatlon。t pletely and availably its obviation, parts of greases enriches to gather in in the dirty mire, through turn to brush the oxygen agitation, creation large quantity foam。t like to control very much in operate process its at two sink the pond stop over time, resulting in the anoxia easily, producing the corrupt and dirty mire ascend to float。Moreover, contain the oil in the waste water? Take place thedirtymire ascendafterfloating should pauseenter water, broke off or dirty mire in clearance, judge the clear reason, adjust the dirty mire sinks to decline the sex bad, can throw to add of oagulate or sloth materials, the improvement precipitates the sex。1f discover the dirty mire is corrupt, should enlargement tolerance, the clearance accumulates the mire, and try the ameliorative pond internal water dint term!39。530 oxidize the ditch water the deep(~ ms) paring, turn to brush occupied the deep 1 / 1 0~ in water 1/12, turned the dish to also occupy the 1/639。 ms, even larger}, but the bottom current velocity is very small( especially at the water is deep 2/3 or 3/4 below, mix with the liquid has no current velocity almost), causing ditch bottom large quantity accumulate the mire( sometimes accumulate the mire thickness amount to a ms), the valid capacity that reduced to oxidize the ditch consumedly, lowered to handle result, affected a water fluid matter. Moreover, pass in the spirit on board swim to establish the underwater push machine can also turn to the spirit of the liquid of admixture that brush the bottom low speed area circulates to flow to rise positive push function, from but the solution oxidizes the problem that low and dirty mire in