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111.
曝气生物滤池处理炼油废水的试验研究 总被引:2,自引:0,他引:2
采用曝气生物滤池处理炼油废水,考察HRT、进水有机负荷、气水体积比等因素对生物滤池处理效果的影响.结果表明:在HRT为2h,进水CODCr负荷小于2.0 kg/(m3·d),气水体积比为3时,出水CODCr的质量浓度为16.64 mg/L,去除率为85.41%;出水NH3-N的质量浓度为2.07 mg/L,去除率为74.92%;出水浊度为2.12NTU,去除率为92.15%.曝气生物滤池经过气水联合反冲洗后调整适应期为5h,此时CODCr和NH3-N的去除率分别为70.88%和62.31%,浊度在4.0 NTU以下. 相似文献
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ABR工程设计的要点分析 总被引:1,自引:0,他引:1
针对印染废水的特性和已有印染废水生化处理工艺在工程应用中存在的问题分析的基础上,提出ABR工艺方案,成功应用于印染废水的厌氧处理工段,保证了稳定的COD去除效率和脱色效果.通过分析ABR反应器的运行规律,总结出HRT、反应器内的水力流态优化是ABR设计成败的关键. 相似文献
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为指导确定工业园区内集中式污水处理厂曝气池的HRT,利用测定的各企业排放废水的好氧呼吸曲线.根据耗氧速率曲线折点和可充分降解的水量的比例,确定综合废水曝气池的HRT。试验结果表明,某工业园区企业PG1-~PG1—6和YR2—1~YR2—4废水的HRT应分别为:26、22、22、40、30、50、36、16、16、16h,确定综合废水曝气池HRT设计值为36h.与采用该方法测定的工业园区综合污水厂实际的曝气池HRT(32h)接近。该方法简单有效,可合理确定工业园区集中式污水处理厂的曝气池HRT设计值。 相似文献
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Due to the higher uncertainty of environmental risk for pollutants’ treatment by activated sludge, 10 mg/L influent 4‐chlorophenol (4‐CP) treated via a sequencing batch reactor (SBR) was used as acclimated SBR. Another SBR was used as control SBR without 4‐CP. The effects of hydraulic retention time (HRT) and proteins on sludge toxicity for 4‐CP treatment were analysed, and compared to the control SBR. Results showed that the sludge toxicity in acclimated SBR was significantly higher than that of the control SBR. Shortening HRT from 12 to 8 hours was beneficial to degrade 4‐CP and lower sludge toxicity. The identified highly expressed protein of ABC transporter co‐existed in control and acclimated SBRs, while other proteins of TonB‐dependent receptor, heat shock 70 kDa protein and superoxide dismutase in acclimated sludge were overexpressed relative to the control sludge, which played an important function in degrading 4‐CP, resisting 4‐CP toxicity and eliminating sludge toxicity. 相似文献
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《International Journal of Hydrogen Energy》2019,44(1):136-143
The aim of the study is biohydrogen production from hydrolyzed waste wheat by dark fermentation in a continuously operated up-flow packed bed reactor. For this purpose, the effect of hydraulic retention time (HRT) on the rate (RH2) and yield (YH2) of hydrogen gas formation were investigated. In order to determine the most suitable hydraulic retention time yielding the highest hydrogen formation, the reactor was operated between HRT = 1 h and 8 h. The substrate was the acid hydrolyzed wheat powder (AHWP). Waste wheat was sieved down to 70 μm size (less than 200 mesh) and acid hydrolyzed at pH = 2 and 90 °C in an autoclave for 15 min. The sugar solution obtained from hydrolysis of waste wheat was used as substrate at the constant concentration of 15 g/L after neutralization and nutrient addition for biohydrogen production by dark fermentation. The microbial growth support particle was aquarium biological sponge (ABS). Heat-treated anaerobic sludge was used as inoculum. Total gas volume and hydrogen percentage in total gas, hydrogen gas volume, total sugar and total volatile fatty acid concentrations in the feed and in the effluent of the system were monitored daily throughout the experiments. The highest yield and rate of productions were obtained as YH2 = 645.7 mL/g TS and RH2 = 2.51 L H2/L d at HRT = 3 h, respectively. 相似文献