镁改性活性炭强化活性污泥处理混合污水研究

基于序批式活性污泥法(SBR)工艺,将镁盐改性活性炭(MgO-PAC)与传统活性炭(PAC)混合而成MPAC材料,用于处理生活与工业混合污水。通过连续30 d的运行实验,探讨了MPAC材料对生活与工业混合污水中COD、NH4^+-N和TP的去除效果以及对污泥的比耗氧速率、沉降性能和微生物多样性的影响。结果表明,投加MPAC材料对污水中COD的去除率提升了12.7百分点,对TP的去除率提升了17.5百分点,对NH4^+-N的去除率超过86.4%。投加MPAC后处理效果更好的重要原因,在于MPAC使得活性污泥的沉降性能和比耗氧速率得到明显改善,也提升了污泥的微生物丰度。MPAC对活性污泥处理生活与工业混合污水具有强化作用。     

SBR处理村镇生活污水试验研究

研究了用SBR处理系统在不同水力停留时间,不同污泥龄(SRT),不同温度条件下对村镇生活污水的去除有机物、脱氮除磷效果。结果表明,考虑到脱氮除磷效果并兼顾经济的原则,水力停留时间采用6h比较合理,SBR反应器的最适SRT为20d;温度SBR反应器的除磷效果影响较小,SBR反应器更适合处理低温污水。     

凹凸棒石/丁苯橡胶纳米复合材料制备及其性能

苏皖一带的沉积型土状凹凸棒石是一种天然纳米纤维。用硅烷偶联荆和不饱和脂肪酸对凹凸棒石进行改性，制备了凹凸棒石／了苯橡胶纳米复合材料。对材料力学性能及其影响因素进行了讨论；分析了有机改性、胶料混炼、硫化等工艺过程中凹凸棒石结构的变化。     

贵阳小河污水厂低浓度生活污水处理系统的技术改造

贵阳小河污水处理厂的进水收集系统采用雨污合流制，导致进水有机物浓度大大低于设计指标。经过技术改造后，解决了SBR反应池内溶解氧过剩和污泥浓度的控制问题，得到了脱水系统的最佳运行参数，并在保证出水水质达到《城镇污水处理厂污染物排放标准》（GB18918-2002）一级B标准的同时取得了很好的节能降耗效果。     

An extension of ASM2d including pH calculation

This paper presents an extension of the Activated Sludge Model No. 2d (ASM2d) including a chemical model able to calculate the pH value in biological processes. The developed chemical model incorporates the complete set of chemical species affecting the pH value to ASM2d describing non-equilibrium biochemical processes. It considers the system formed by one aqueous phase, in which biochemical processes take place, and one gaseous phase, and is based on the assumptions of instantaneous chemical equilibrium under liquid phase and kinetically governed mass transport between the liquid and gas phase. The ASM2d enlargement comprises the addition of every component affecting the pH value and an ion-balance for the calculation of the pH value and the dissociation species. The significant pH variations observed in a sequencing batch reactor operated for enhanced biological phosphorus removal were used to verify the capability of the extended model for predicting the dynamics of pH jointly with concentrations of acetic acid and phosphate. A pH inhibition function for polyphosphate accumulating bacteria has also been included in the model to simulate the behaviour observed. Experimental data obtained in four different experiments (with different sludge retention time and influent phosphorus concentrations) were accurately reproduced.     

Aerobic granular sludge in a sequencing batch reactor

In a laboratory scale sequencing batch reactor (SBR) granules were cultured under aerobic conditions. To enhance the growth of granular sludge the SBR was operated with very short sedimentation and draw phases resulting in the washout of slow settling biomass. Fast settling granules were retained in the reactor and thus had an advantage over flocs with a slower settling velocity. After 40 days of operation granules were the dominant form of microbial aggregates in the reactor, even though some pin-point flocs remained in the system. Granules taken from the reactor were stored for weeks without disintegrating. After about 130 days of operation the granule quality and COD-removal worsened. The reasons for that are yet to be investigated.     

微电解-混凝-SBR法处理焦化废水

采用微电解-混凝-SBR串联工艺处理焦化废水的试验结果表明，微电解-混凝(作为SBR工艺的预处理)能提高该废水的可生化性，同时使COD、酚、氰等污染物也得到了部分去除；预处理的适宜参数为：进水COD=1700～2400mg／L、pH=3．0～3．2、微电解柱的水力停留时间(HRT)=55～65min、Fe／C=1：1．5；经微电解-混凝-SBR串联工艺处理后，出水中酚、氰、COD、氨氮的浓度分别小于0．5、0.5、100、15mg／L，总去除率均在90％以上，达到了国家一级排放标准(GB13456-92)。     

Pilot Scale Aerobic Sequencing Batch Reactor for Pig Waste Treatment

A n existing aetated lagoon treating piggery waste was converted into an aerobic sequencing batch reactor (SBR). After the commissioning period, the SBR plant treated piggery wastewater containing BOD and suspended solids (SS) concentrations of 2881 mg/l and 1419 mg/1 respectively, producing an effluent having an average BOD and SS of 18.7 mg/1 and 12.3 mg/1 respectively. The volumetric loadings on the SBR and the process were similar. However, the SBR process operated at a lower mixed liquor suspended solids (MLSS) concentration and shorter sludge retention period. Although the capital and operating costs of the SBR are higher than for the aerated lagoon, the simplicity of operation, the high BOD and SS removal efficiency, and the small land requirement make this type of process an attractive treatment option, particularly in places where land supply is limited and expensive.