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    When the UASB influent pH is 4-5,COD is 8 900-12 100 mg/L and BOD is 4 500-5 000 mg/L,the volumetric COD loading rate reaches 10 kg/(m3·d) and COD removal rate is 85%. In the process,COD and BOD removal rate reaches 97.4% and 98.6%,the effluent COD and BOD is less than 300 mg/L and 30 mg/L.
    当进水pH4~5、COD8900~12100mg/L和BOD4500~5000mg/L时,UASB反应器COD容积负荷达到10kg/(m3.d),COD去除率达到85%,系统COD和BOD去除率可分别达到97.4%和98.6%,出水COD<300mg/L,BOD<30mg/L。
    When the influent pH is 11,the effluent pH can keep between 7~8and influent pH has no distinguished impact on removal efficiency of COD.
    在进水pH值11的条件下,出水的pH保持在在7~8之间,进水pH值对COD去除效果没有明显影响。
    With influent pH 3 and HRT 6h, theremoval rate of COD_(cr), volatile phenolic compounds and TP reached 66%, 60.2%,29% respectively. When pH was improved to 5.5 or higher, BOD/COD ratio increasedto 0.48 from 0.28.In the diffusion dialysis experiment, with distilled water/acid wastewater 1 andQ=600mL/h, 20% Cl—was separated from wastewater.
    当进水pH为3,停留时间为6h时,废水COD_(cr)、挥发酚、总磷去除率最高可达66%、60.2%、29%左右,出水pH提高到5.5以上,废水的BOD/COD从0.28提高到0.48左右。
    The experiments showed that the iron removal in the filter was mainly depended on biological oxidation other than contact oxidation when the influent pH was about 6.5 and DO was 2.5mg/L and the water temperature was 20℃.
    试验结果表明,在进水pH值为6.5,DO为2.5mg/L,温度为20℃,滤柱除铁机理主要是生物氧化除铁作用。
    Theoretical analysis and experimental study show that,on the condi-tion of COD>3000mg/L,SO_4~(2-)<5100mg/L,COD/SO_4~(2-)>4,the main effectof sulphate on anaerobic digestion of high strength organic wastewateris to increase the pH of the process continuously. In order to prevent pHfrom exceeding the pH ronge for methane producing bacteria growth,the influent pH must be decreased properly.
    本文所做的机理分析和试验研究表明,在COD>3000mg/L,SO_4~(2-)<5100mg/L,COD/SO_4~(2-)>4的条件下,硫酸盐对高浓度有机废水厌氧处理的影响主要是使发酵过程pH 值不断上升,为了防止pH 高出产甲烷菌生长的最佳范围,需适当降低进水的pH 值。
    As the influent pH is 10.0, MLSS 20 g/L, and HRT 9~10 h, the removal rates of COD could reach average 36.8%, and the BOD/COD ratio of influent to effluent could increase from 0.285 to 0.447, and the biodegradability of wastewater is improved obviously.
    结果表明 ,调节原水 pH值为 10左右 ,污泥质量浓度为2 0 g/L ,水力停留时间为 9~ 10h的条件下 ,处理后的废水COD去除率平均为 38 6 % ,进出水的BOD/COD比值由0 2 85升高至 0 44 7,废水可生化性得到明显改善。
    Through the study on the influence of reaction time,influent pH value,re action temperature as well as the oxygen partial pressure to the pretreatment of production wastewa ter containing methyl chloride by we t oxi-dation process,the most suitable op eration conditions for the pretreatment are obtained:reaction time 60min. ,no pH value regulation to wastewater,reaction temperature 180℃,oxygen partial pressure 1.5MPa.
    通过研究反应时间、进水pH值、反应温度以及氧分压对湿式氧化法预处理甲基氯化物生产废水的影响,得出预处理的最适宜操作条件为:反应时间60min、不调节废水的pH值、反应温度180℃、氧分压1.5MPa。
    Under the experiment conditions, influent pH≤10.5 had hardly any effects on the activated sludge, which began to disperse and be inhibited under the conditions of influent pH≥11.1 and HRT<16h.
    试验条件下,进水pH≤10.5不会对活性污泥性能产生明显抑制; 进水pH≥11.1、水力停留时间(HRT)<16h时,活性污泥性能受到抑制,污泥出现离散,通过延长HRT可以减轻或消除抑制;
    The influence of reaction time,influent pH,reaction temperature and oxygen pressure on pretreatment of methyl chloride wastewater by wet air oxidation has been studied.
    研究了反应时间、进水pH、反应温度以及氧分压对湿式氧化法预处理甲基氯化物生产废水的影响。
    The influence of NH 3 N concentration in regeneration liquid,influent suspended solid concentration,influent pH and regeneration liquid dosage on the treatment effect was examined.
    考察了再生液中NH3 N浓度、进水NH3 N浓度、进水悬浮物浓度、进水pH、再生液用量等因素对处理效果的影响;
    When effluent pH is 5~8.5, the effluent manganese is < 0.1 mg/L. When pH is < 5, the effluent manganese will be increased sharply with the decrease of influent pH.
    当出水pH值为5~8.5时,出水含锰量<0.1mg/L,但当pH<5时,出水含锰量随进水pH值的降低而急剧增加;
    The experiments show that when the influent pH is 6.8,the dosage of cationic aluminum polychloride (PAC)is 400 mg/L and that of polyacrylamide (PAM)is 12 mg/L,the removal rates of COD and color are 37.8% and 72.7% respectively;
    在废水pH为6.8、聚合氯化铝(PAC)和阳离子聚丙烯酰胺(PAM)的用量分别为400和12mg/L条件下,废水COD、色度去除率分别为37.8%、72.7%;
    By orthogonal test, the best parameters of micro-electrolysis pre-treatment of coking wastewater are: influent COD2200~2400 mg/L, influent pH 3.0~3.2, HRT 55~65 min, volume ratio of Fe/C=1:1.5. Using the micro-electrolysis-SBR bio-treatment technology the effluent water can meet Grade I requirement of the National Discharge Standard (GB13456-1992) for discharging industrial wastewater.
    通过正交试验确定了微电解法预处理焦化废水的适宜参数为:进水COD2200~2400 mg/L,进水pH值约3.0~3.2,微电解水力停留时间HRT55~65 min,Fe/C(体积比)1:1.5. 应用微电解预处理-SBR深度处理焦化废水,可使出水达标排放(国家I级排放标准GB13456-92).
    The determined optimum process conditions are as follows:voltage 25~30 V,electrolysis time 120~180 min,influent pH 6.5~7.5.The removal rates of the effluent colority and COD are over 90% and 50% respectively.
    确定了处理废水的最佳工艺条件 :反应器槽电压 2 5~ 30V、电解时间 12 0~ 180min、进水 pH 6 5~ 7 5。
    In the process of the experiment, influent COD was 5000~12000 mg/L, and influent pH over 8.0. After sludge taming and culturing, about 80% COD removal rate was achieved, with organic loading 6.0kg COD/(m~3\5d), and effluent pH about 7.3. The reactor can meet the demand of expectation and ensure the sequent aerobic treatment.
    在试验过程中 ,进水浓度COD为 50 0 0~ 1 2 0 0 0mg/L ,pH >8.0 ,通过对污泥的驯化培养 ,COD去除率达 80 %左右 ,运行的容积负荷可达 6.0kgCOD/ (m3·d) ,pH稳定在 7.3左右 ,能够达到预定要求并为后续的好氧处理提供保证
 

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