共查询到19条相似文献,搜索用时 125 毫秒
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针对APMP制浆废水的特点,采用物化预处理+水解酸化预处理+IC反应器处理(内循环厌氧反应器)+好氧处理+深度处理作为废水处理工艺,工艺运行稳定,成本低廉,完全达排放标准。 相似文献
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采用厌氧水解—好氧和单独好氧处理两种生化方法对蒽醌染整废水进行了平行对照试验。结果表明,厌氧水解—好氧处理方法可有效地提高该废水的可生化程度。当进水CODcr浓度为400mg/L、色度为800倍时,厌氧水解—好氧处理后出水CODcr可达120—170mg/L,CODcr去除率在63%以上,色度降低至150倍,明显优于单一好氧处理的出水水质。 相似文献
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我国餐饮废水处理技术研究进展 总被引:3,自引:0,他引:3
综合论述了我国餐饮废水的特点及处理现状。介绍了SBR法、生物接触氧化法、厌氧-好氧联合工艺法、膜生物反应器法、混凝法、电化学法处理餐饮废水的技术及适用条件。比较了各种处理技术的优势和不足,预测了我国餐饮废水处理的发展趋势。并认为,集除油、降解有机悬浮物于一体的餐饮废水一体化处理设备将会得到广泛应用,而针对餐饮废水特点培养出高效生物茵种的复合生物技术将是治理餐饮废水的最有效方法。 相似文献
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缩短厌氧消化时间改善猪场废水厌氧消化液好氧后处理性能的可行性 总被引:3,自引:1,他引:2
采用批式厌氧消化以及间歇曝气的摇瓶试验进行猪场废水厌氧-好氧处理,研究了猪场废水厌氧消化对好氧后处理的影响,以及控制厌氧消化进程改善猪场废水厌氧消化液好氧后处理性能的可行性.对猪场废水原水(厌氧消化0d)直接进行好氧处理,COD和NH4 -N去除率分别可达到95%和98%以上,出水COD低于300mg·L-1,NH4 -N低于10mg·L-1.对厌氧消化液进行好氧后处理,出水COD和NH4 -N浓度随好氧处理时间的增长逐渐升高,厌氧消化前处理时间越长,升高时间越早,幅度越大.实验结束时,出水COD基本在500-600 mg·L-1之间;厌氧消化3、6、9、12d的消化液好氧后处理出水的NH4 -N分别达到22.2、105.4、147.6、171.4 mg·L-1.尽管厌氧消化3d时,COD去除率只有47.5%,但消化液好氧后处理的效能仍然没有提高,只是系统恶化的时间略迟于厌氧消化6、9、12d的消化液.厌氧消化液好氧后处理效果差的原因主要是:在厌氧消化过程中,各污染物降解的差异导致了厌氧消化液可生化性降低以及碳、氮、磷比例失调,影响了好氧后处理过程微生物的生长;厌氧消化液中缺乏易降解有机物,导致反硝化效果差,产生的碱度不能弥补硝化过程消耗的碱度,引起pH下降,进而影响了微生物活性.因此,通过缩短厌氧消化时间的方式来改善消化液好氧后处理的性能是不可行的. 相似文献
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生物—物理化学法处理制浆黑液的试验研究 总被引:4,自引:0,他引:4
采用酸中和—厌氧—好氧—生物活性炭或化学混凝综合法处理制浆黑液,探讨了酸中和处理的影响因素及厌氧处理对后段好氧处理的影响.结果表明:两种综合处理工艺对黑液中木质素及COD_(Cr)的去除有显著效果;厌氧处理比好氧处理对木质素的降解更为有利. 相似文献
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Nitrogen removal via nitrite from municipal landfill leachate 总被引:2,自引:0,他引:2
A system consisting of a two-stage up-flow anaerobic sludge blanket (UASB), an anoxic/aerobic (A/O) reactor and a sequencing
batch reactor (SBR), was used to treat landfill leachate. During operation, denitrification and methanogenesis took place simultaneously
in the first stage UASB, and the e uent chemical oxygen demand (COD) was further removed in the second stage UASB. Then the
denitrification of nitrite and nitrate in the returned sludge by using the residual COD was accomplished in the A/O reactor, and ammonia
was removed via nitrite in it. Last but not least, the residual ammonia was removed in SBR as well as nitrite and nitrate which were
produced by nitrification. The results over 120 d (60 d for phase I and 60 d for phase II) were as follows: when the total nitrogen
(TN) concentration of influent leachate was about 2500 mg/L and the ammonia nitrogen concentration was about 2000 mg/L, the shortcut
nitrification with 85%–90% nitrite accumulation was achieved stably in the A/O reactor. The TN and ammonia nitrogen removal
e ciencies of the system were 98% and 97%, respectively. The residual ammonia, nitrite and nitrate produced during nitrification in
the A/O reactor could be washed out almost completely in SBR. The TN and ammonia nitrogen concentrations of final e uent were
about 39 mg/L and 12 mg/L, respectively. 相似文献
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Advanced landfill leachate treatment using a two-stage UASB-SBR system
at low temperature 总被引:2,自引:0,他引:2
Hongwei Sun Qing Yang Yongzhen Peng Xiaoning Shi Shuying Wang Shujun Zhang 《环境科学学报(英文版)》2010,22(4):481-485
A two-stage upflow anaerobic sludge blanket(UASB) and sequencing batch reactor(SBR) system was introduced to treat landfill leachate for advanced removal of COD and nitrogen at low temperature.In order to improve the total nitrogen(TN) removal efficiency and to reduce the COD requirement for denitrification,the raw leachate with recycled SBR nitrification supernatant was pumped into the first-stage UASB(UASB1) to achieve simultaneous denitrification and methanogenesis.The results showed that UASB1 played an important role in COD removal and UASB2 and SBR further enhanced the nutrient removal efficiency.When the organic loading rates of UASB1,UASB2 and SBR were 11.95,1.63 and 1.29 kg COD/(m3·day),respectively,the total COD removal efficiency of the whole system reached 96.7%.The SBR acted as the real undertaker for NH4+-N removal due to aerobic nitrification.The system obtained about 99.7% of NH4+-N removal efficiency at relatively low temperature(14.9-10.9°C).More than 98.3% TN was removed through complete denitrification in UASB1 and SBR.In addition,temperature had a significant effiect on the rates of nitrification and denitrification rather than the removal of TN and NH4+-N once the complete nitrification and denitrification were achieved. 相似文献
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UASB-SBR-陶粒过滤工艺处理白酒生产污水 总被引:6,自引:0,他引:6
根据白酒污水水质特点 ,选择了UASB SBR 陶粒过滤处理工艺。运行结果表明可以达到国家综合排放标准的二级标准。文章重点介绍了各构筑物运行参数和调试运行情况 相似文献
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在低温条件下,采用缺氧/厌氧UASB-SBR组合工艺处理实际垃圾填埋场渗滤液.结果表明,该工艺可实现有机物和氮的同步、深度去除.在进水COD平均为11950.2mg/L,NH4+-N为982.7mg/L的条件下,出水分别为390.1mg/L和2.9mg/L,去除率分别为96.7%和99.7%.同时,缺氧UASB1反应器的最大COD负荷达到13kg/(m3×d),最大COD去除速率为12.39 kg/(m3×d),具有高效缺氧反硝化和高效厌氧降解有机物反应的双重功效, 在SBR反应器的缺氧段和缺氧UASB,反应器内获得了99%以上的反硝化率.对于冬季水温分别为14.9,14.1,13.5,11.05℃的低温条件下,SBR反应器实现了完全硝化和反硝化,出水TN分别为4.1,5.7,14.1,16.5mg/L,达到了深度脱氮的目的.此外,在上述温度范围内,温度对反硝化速率(rN)的影响大于对硝化速率 (rDN)的影响, rN/rDN比值相对恒定. 相似文献
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The soluble microbial products (SMP) in the biological treatment effluent are generally of great amount and are poorly biodegradable. Focusing on the biodegradation of anaerobic SMP, the biological activated carbon (BAC) was introduced into the anaerobic system. The experiments were conducted in two identical lab-scale up-flow anaerobic sludge blanket (UASB) reactors. The high strength organics were degraded in the first UASB reactor (UASB1) and the second UASB (UASB2, i.e., BAC) functioned as a polishing step to remove SMP produced in UASB1. The results showed that 90% of the SMP could be removed before granular activated carbon was saturated. After the saturation, the SMP removal decreased to 60% on the average. Analysis of granular activated carbon adsorption revealed that the main role of SMP removal in BAC reactor was biodegradation. A strain of SMP-degrading bacteria, which was found highly similar to Klebsiella sp., was isolated, enriched and inoculated back to the BAC reactor. When the influent chemical oxygen demand (COD) was 10,000 mg/L and the organic loading rate achieved 10 kg COD/(m 3 ·day), the effluent from the BAC reactor could meet the discharge standard without further treatment. Anaerobic BAC reactor inoculated with the isolated Klebsiella was proved to be an effective, cheap and easy technical treatment approach for the removal of SMP in the treatment of easily-degradable wastewater with COD lower than 10,000 mg/L. 相似文献
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