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什么樣的牙齒不能馬上接受牙齒種植?
急性炎癥;
重度牙周炎;
嚴(yán)重的咬合不正;
缺牙間隙過小,牙間距離過短;
牙周病所致的骨質(zhì)疏松,有持續(xù)性骨吸收的,可導(dǎo)致種植體的松動(dòng)脫落;
缺牙間隙過小,牙間距離過短。
出現(xiàn)上述癥狀,先治好牙病,矯正好牙齒后再接受牙齒種植。
什么樣的人不能馬上接受牙齒種植?
⑧活性污泥的結(jié)構(gòu)和生物相通過鏡檢檢查菌膠團(tuán)的結(jié)構(gòu)和指示微生物判斷活性污泥的狀態(tài)，防止污泥膨脹,四、污水處理設(shè)備的維護(hù)保養(yǎng)：,After hydrolysisand acidification, the wastewater enters oxygen-poor tank, contactoxidation tank and secondary sedimentation tank in order tocirculate, so that the wastewater is in the environment of anoxicand oxygen-enriched cycle transformation, and the followingtransformation can be achieved.- Denitrification; convertingorganic nitrogen into ammonia nitrogen, transforming ammonianitrogen into nitrite nitrogen and nitrate nitrogen through aerobicmicrobial nitrification bacteria, and then transforming nitritenitrogen and nitrate nitrogen into nitrogen through anaerobicmicrobial denitrification bacteria, escaping from sewage-phosphorus removal; high phosphorus content sludge is formed byphosphorus accumulating bacteria releasing phosphorus in anoxicenvironment and absorbing excessive phosphorus in oxygen-richenvironment.- Degrading organic matter thoroughly; On the basis ofhydrolysis acidification, utilizing the characteristics of rapidpropagation of aerobic microorganisms in oxygen-rich environmentand rapid propagation of anaerobic microorganisms in anoxicenvironment, degrading organic matter in turn and transforming itinto sludge(3) Disinfection of sewage to meet dischargestandards(4) Regular removal of sludgeThe characteristics of sewagetreatment methods in small and medium-sized hospitals are asfollows: the volume of the oxygen-poor pool is much smaller thanthat of the contact oxidation pool. When the sewage circulates, theresidence time in the oxygen-poor pool is very short, while theresidence time in the contact oxidation pool is very long, so thatthe sludge produced by biochemical treatment is mainly deposited inthe contact oxidation pool.The characteristics of sewage treatmentmethods in small and medium-sized hospitals are as follows: theoxygen-poor pool is composed of adjusting aeration pool and anoxicpool in series. The two pools are connected structure. By changingthe aeration degree of the adjusting aeration pool, the sewage isfully mixed and the water quality is uniform.4. The sewagetreatment method for small and medium-sized hospitals as describedin claim 3 is characterized in that the sewage treatment stationalso includes a sludge concentration pond which is connected with acontact oxidation pond, and the sludge concentration pond isequipped with a refluxpipe.與調(diào)節(jié)曝氣池連通，回流管路上配有回水泵，開啟回水泵，將污泥濃縮池的上層污水泵回調(diào)節(jié)曝氣池，使下層的污泥濃縮，也使接觸氧化池中的污泥持續(xù)進(jìn)入污泥濃縮池Thecharacteristics of sewage treatment methods in small andmedium-sized hospitals are as follows: chlorine dioxide is injectedinto the drainage pipe of secondary sedimentation tank; chlorinedioxide flow rate is accurately measured by metering pump to reduceresidual chlorine residue; at the same time, water body issufficiently mixed from the contact oxidation tank and aerated byblower to reduce dosage.6. The small and medium-sized hospitalsewage treatment method described in Fig. 4 is characterized bythat the sewage return flow R = 1:1, i.e. the sewage circulationflow: the treated discharge flow = 1:1.At present, the total numberof medical units above county level (including industrial andmining enterprises hospitals, military hospitals, private hospitalsand Sino-foreign joint venture hospitals, etc.) in our country(except Hong Kong Special Administrative Region, Macao SpecialAdministrative Region and Taiwan region) is about 21,000, of which1041 are tertiary first-class hospitals, accounting for about 5% ofthe total number of hospitals, 90% of which are small andmedium-sized hospitals below secondary level, relatively speaking,large hospitals. All of them have more standardized wastewatertreatment systems, and are equipped with professional maintenanceand management. However, due to the reasons of fund, operation costand personnel quality, a large number of small and medium-sizedmedical institutions are weak in the construction of medicalwastewater treatment facilities, and their operation is notcompletely normal, which is a difficult and important point incurrent pollution control.The sewage discharged by hospitalsconsists of two parts, one is domestic wastewater, the pollutantsare mainly organic matter, the other is medical wastewater, thepollutants are mainly nitrogen, phosphorus and so on. At present,most of the small and medium-sized medical institutions in ourcountry generally adopt the first-level intensified treatment. Thetypical process is as follows.The characteristic of the first-levelintensification process is that it can effectively controlpathogens through disinfection process, but the removal effect ofCOD and BOD is not good and can not meet the requirements ofenvironmental protection.In recent years, with the progress ofsocial economy and the improvement of people"s awareness ofenvironmental protection, more and more small and medium-sizedmedical institutions have built a number of secondary biochemicaltreatment facilities. The processes adopted include A/O, SBR,oxidation ditch and contact oxidation.As can be seen from Table 1,three biological treatment methods, A/O, SBR and oxidation ditch,all have good treatment effect.However, for small and medium-sizedmedical institutions, due to the lack of funds and managers, theremay be insufficient funds in the actual implementation process, orthere may be inadequate management and excessivedischarge.Relatively speaking, contact oxidation method is moresuitable for sewage treatment in small and medium-sized medicalinstitutions, but contact oxidation method lacks oxygen-deficientstage, so the ability of denitrification is weak. Nitrogen ineffluent is basically converted to nitrate, ammonia nitrogen mayreach the standard, and the essence of total nitrogen has not beenremoved.The purpose is to overcome the shortcomings of theabove-mentioned treatment methods and provide a more suitabletreatment method for sewage treatment in small and medium-sizedhospitals. The treatment process of this method is simple, occupiesless land, has low construction investment and operation cost. Itcan not only meet the sewage treatment standards, but also is easyto operate and manage, and has low requirements for the quality ofoperators.,不同處理工藝的應(yīng)用情況考慮到以上原則，本方案設(shè)計(jì)的醫(yī)院污水處理工藝流程進(jìn)行比較，隨著污水處理技術(shù)不斷地發(fā)展，近年開發(fā)的在國內(nèi)外普遍應(yīng)用的工藝有
