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焦化废水生物脱氮处理开工调试 总被引:9,自引:0,他引:9
介绍了焦化废水生物脱氮处理系统开工调试中污泥培养驯化、系统稳定运行改善出水水质 ,以及影响硝化和反硝化反应的因素等几方面的体会。 相似文献
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高浓度有机废水作为焦化废水生物脱氮处理补充碳源的研究 总被引:3,自引:0,他引:3
对多种高浓度有机废水作为焦化废水生物脱氮处理补充碳源的可行性进行了研究 ,并探讨了不同种类碳源对生物脱氮反硝化速率的影响 相似文献
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BAF工艺处理焦化废水研究 总被引:5,自引:0,他引:5
采用单级BAF工艺进行焦化废水处理试验,以水力负荷为控制参数,在正常pH、温度、营养比等条件下,考察BAF对焦化废水的处理效果。结果表明,当水力负荷小于0.2m3/(m2·h)时,BAF能有效地去除焦化废水中的CODCr、酚、氰,去除率均大于90%,其中出水CODCr达到GB13456-92国家二级排放标准,酚、氰低于国家一级排放标准。但其对NH3-N去除效果较差,甚至出水浓度高于进水浓度。此外单级BAF也不能脱去焦化废水的色度,处理后的废水仍为浅酱油色。要使出水达标排放,需采用两段BAF:其中一段为脱碳滤池(除COD),另一段为硝化滤池(脱氮)。 相似文献
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本文针对反硝化-硝化生物脱氮工艺中以Na_2CO_3作为硝化过程补充碱源费用较高的问题,进行了以Ca(OH)_2代替Na_2CO_3作为硝化过程碱源的可行性研究,依据研究结果进行了费用分析。研究结果表明:Ca(OH)_2代替Na_2CO_3作为硝化过程的碱源,对脱氮系统 微生物的生命活动无不良影响,影响Ca(OH)_2替代Na_2CO_3作为硝化反应碱源的决定因素是废水中可溶性磷酸盐的含量,只有当废水中可溶性磷酸盐保持一定的浓度,满足微生物生长需要时,硝化菌才能保持很高的活性,使硝化反应进行彻底,否则脱氮效果会大幅度降低,以Ca(OH)_2代替Na_2CO_3作为硝化过程的碱源,只有Ca(OH)_2替代量大于总需碱量的2/3时,经济上才是合理的。 最后,本文对生物脱氮工艺的设计方法进行了研究,并提出了一种更为合理的设计方法。 相似文献
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采用厌氧调节 SBR工艺处理烤鳗废水 ,竣工监测结果表明 ,各项污染物指标均达到《污水综合排放标准》(GB8978 1996 )的一级标准 ,运行中通过调控曝气量和DO ,可实现良好的NH3-N去除效果 相似文献
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《城镇污水处理厂污染物排放标准》(GB18918—2002)中规定了新的氮排放标准。通常污水处理厂采用生物脱氮处理工艺时,出水中氮含量远低于规定值,为此,提出了生物脱氮处理工艺出水水质恰好达标的几种工艺,以节约投资与运行费用。 相似文献
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介绍了用一体式膜生物反应器(M BR)处理焦化废水的技术,讨论了对焦化废水中的COD,NH3-N和浊度的去除效果及影响因素。实验结果表明,一体式膜生物反应器用于处理焦化废水在技术上是可行的,调整合适的操作参数,其对焦化废水中的COD,NH3-N和浊度的平均去除率分别达到80%、95%、90%以上,操作简单,出水水质好,稳定,且优于国家一级排放标准,有一定的推广意义。 相似文献
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沉淀池生物污泥回流工艺生物强化作用的研究 总被引:2,自引:0,他引:2
利用生物预处理出水中携带的硝化细菌和异养细菌等微生物,在后续沉淀单元产生生物延伸效应,并通过采取沉淀池生物污泥回流强化措施,使沉淀池在去除浊度的同时,产生类似活性污泥法的作用,强化生物净化作用.在增加生物污泥回流前、后,沉淀池出水CODMn平均分别为4.16mg/L、2.72 mg/L,沉淀池出水相对生物预处理出水CODMn的平均去除率由4.65%提高至31.4%,去除效果显著提高.同时,增加生物污泥回流后,对浊度和氨氮的去除也得到进一步的改善. 相似文献
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好氧池溶解氧对MBR工艺处理效果及运行能耗的影响 总被引:1,自引:0,他引:1
采用倒置A2/O型MBR中试装置,分别在夏季和冬季,通过控制好氧池DO水平,研究好氧池DO对MBR工艺处理效果的影响.试验结果表明:对于试验原水水质,在夏季,当好氧池DO为0.3~0.4 mg/L时,出水水质能够达到<城镇污水处理厂污染物排放标准>(GB 18918-2002)一级A标准;在冬季,硝化菌对DO的要求较高,必须维持好氧池DO在1 mg/L以上,出水水质才能达到一级A标准.运行能耗分析表明,与好氧池DO为2 mg/L比较,当DO为0.4 mg/L与1 mg/L时,可分别减少供气量17.8%与11.9%. 相似文献
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AOMBR处理高氨氮废水的效能稳定性及影响因素研究 总被引:1,自引:0,他引:1
对AOMBR(缺氧-好氧膜生物反应器)处理高氨氮废水的脱氮效能进行了研究,着重考察了硝化效能的稳定性及影响系统稳定运行的因素.研究结果表明:在适宜的pH、DO和温度下,容积负荷<1.5 kgNH3-N/(m3·d)时,硝化率可保持在99%以上;好氧池中DO>1.5 mg/L能满足硝化需要;好氧池pH维持在6.8~7.2时可稳定高效地去除氨氮;碱度、污泥龄等也会对硝化效率产生影响.在好氧池中硝化率较高的情况下,影响反硝化效果主要是回流比和碳源. 相似文献
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维生素制药废水经过初步生化处理后,出水水质无法满足要求,具有难降解、COD和氨氮浓度高的特点,针对这些特点,本文采用"强化复合曝气水解酸化→高效厌氧复合反应→流离生物接触氧化"连续工艺深度处理维生素制药废水,研究其可行性。处理规模为7.2 m3/d的中型试验结果表明:强化复合曝气水解酸化能使进水B/C值由0.33提高到0.48,提高下一步生化反应的处理效率,当进水CODCr的浓度为150~641 mg/L,氨氮浓度为6~115 mg/L时,平均去除率分别达到84.28%、93.8%,出水COD浓度小于50mg/L,氨氮浓度小于5 mg/L,出水水质能够达到《城镇污水处理厂污染物排放标准》GB18918-2002中的一级A指标,该连续工艺深度处理此类废水具有可行性和稳定性。 相似文献
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During this study, a mathematical model simulating piggery wastewater treatment was developed, with the objective of process optimisation. To achieve this, the effect of temperature and free ammonia concentration on the nitrification rate were experimentally studied using respirometry. The maximum growth rates obtained were higher for ammonium-oxidising biomass than for nitrite-oxidising biomass for the temperatures above 20 degrees C; values at 35 degrees C were equal to 1.9 and 1.35 day(-1), respectively. No inhibition of nitrification was observed for free ammonia concentrations up to 50 mgN/L. Using these data with others experimental data obtained from a pilot-scale reactor to treat piggery wastewater, a model based on a modified version of the ASM1 was developed and calibrated. In order to model the nitrite accumulation observed, the ASM1 model was extended with a two-step nitrification and denitrification including nitrite as intermediate. Finally, the produced model called PiWaT1 demonstrated a good fit with the experimental data. In addition to the temperature, oxygen concentration was identified as an important factor influencing the nitrite accumulation during nitrification. Even if some improvements of the model are still necessary, this model can already be used for process improvement. 相似文献
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BICT biological process for nitrogen and phosphorus removal. 总被引:8,自引:0,他引:8
An updated biological nitrogen and phosphorus removal process--BICT (Bi-Cyclic Two-Phase) biological process--is proposed and investigated. It is aimed to provide a process configuration and operation mode that has facility and good potential for optimizing operation conditions, especially for enhancing the stability and reliability of the biological nutrient removal process. The proposed system consists of an attached-growth reactor for growing autotrophic nitrifying bacteria, a set of suspended-growth sequencing batch reactors for growing heterotrophic organisms, an anaerobic biological selector and a clarifier. In this paper, the fundamental concept and operation principles of BICT process are described, and the overall performances, major operation parameters and the factors influencing COD, nitrogen and phosphorus removal in the process are also discussed based on the results of extensive laboratory experiments. According to the experimental results with municipal sewage and synthetic wastewater, the process has strong and stable capability for COD removal. Under well controlled conditions, the removal rate of TN can reach over 80% and TP over 90% respectively, and the effluent concentrations of TN and TP can be controlled below 15 mg/L and 1.0 mg/L respectively for municipal wastewater. The improved phosphorus removal has been reached at short SRT, and the recycling flow rate of supernatant between the main reactors and attached-growth reactor is one of the key factors controlling the effect of nitrogen removal. 相似文献