活性污泥1号模型废水特性的测定研究

废水的水质特性是活性污泥数学模型研究和应用的重要方面。采用呼吸计量法及常规化学分析法对污水处理厂的废水特性进行了测定,通过研究发现,污水处理厂的曝气沉砂池出水中SS占总COD的比例平均为10．49％;Xs占总COD的比例平均为14．24％;S1占总COD的比例平均为5．52％。初沉池出水中Ss占总COD的平均比例为9．62％;Xs占总COD的比例平均为16．97％;S1占总COD的比例平均为11．38％。     

Simultaneous adsorption and degradation of γ-HCH by nZVI/Cu bimetallic nanoparticles with activated carbon support

Cu amended zero valent iron bimetallic nanoparticles were synthesized by doping Cu on the surface of iron. They were incorporated with granular activated carbon (AC) to prepare supported particles (AC-Fe⁰-Cu), which were used to remove γ-HCH. Cu on the surface of iron enhanced the dechlorination activity of Fe⁰. The dechlorination rate constant (k_obs) increased with the Cu loading on the surface of iron and the maximum was achieved with 6.073% Cu. AC as a support was effective for increasing the dispersion of the nanoparticles and avoiding the agglomeration of the metallic nanoparticles. The simultaneous adsorption of γ-HCH on AC accelerated the degradation rate of γ-HCH by the bimetals. After reaction for 165 min, around 99% of γ-HCH was removed by the solids of AC-Fe⁰-Cu. In addition, AC could adsorb the degradation products. The degradation of γ-HCH was mainly through dehydrochlorination and dichloroelmination based on the intermediate products detected by GC/MS.     

活性氧化铝吸附在水体砷污染应急处置中的应用

近年来,我国境内相继发生多起水体砷污染环境安全事件。为了将水体砷污染对其周边地区的危害降至最小,如何快速、高效、安全的处理含砷污水就成了处置此类水体污染的关键。现以活性氧化铝吸附技术在山东临沂含砷工业废水跨省污染下游江苏邳州邳苍分洪道事件中的实际应用为例．阐明该技术在快速处置大水量合砷污水中的实际效果与技术特点。     

太原市某污水处理厂各工段重金属含量分析

以太原市某污水处理厂的实际工艺为例,采集各工段污水、污泥为样,对传统活性污泥法水处理工艺运行中的镍、镉、锌、铜的质量浓度进行了分析,结果表明,部分活性污泥回流到初沉池后发现部分重金属在沉淀池中的去除率较高.     

垃圾渗滤液中的氨氮对微生物活性的抑制作用

研究了合成废水和垃圾滤渗滤中氨氮对活性污泥微生物活性的抑制作用。当合成废水的氨氮浓度从５０ｍｇ／Ｌ依次成倍递增至８００ｍｇ／Ｌ时,脱氢酶活性由１１．０４μｇＴＦ／ｍｇＭＬＳＳ下降至４．２２,此时ＣＯＤ的去除率相应由９５．１％降低到７９．１％。     

Influences of influent carbon source on extracellular polymeric substances (EPS) and physicochemical properties of activated sludge

It is necessary to understand the bioflocculation, settling and dewatering characteristics in the activated sludge process in order to establish more efficient operational strategies. The influences of carbon source on the extracellular polymeric substances (EPS) and flocculation, settling and dewatering properties of the activated sludge were investigated. Laboratory-scale completely mixed activated sludge processes were used to grow the activated sludge with different carbon sources of starch, glucose and sodium acetate. The sludge fed with acetate had highest loosely bound EPS (LB-EPS) and that fed with starch lowest. The amount of tightly bound EPS (TB-EPS), protein content in LB-EPS, polysaccharide content and protein contents in TB-EPS, were independent of the influent carbon source. The polysaccharide content in LB-EPS of the activated sludge fed with sodium acetate was lower slightly than those of starch and glucose. The sludge also had a nearly consistent flocs size and the sludge volume index (SVI) value. ESS content of the sludge fed with sodium acetate was higher initially, although it was similar to those fed with glucose and starch finally. However, the specific resistance to filtration and normalized capillary suction time fluctuated first, but finally were stable at around 5.0 × 10⁸ m kg⁻¹ and 3.5 s L g⁻¹ SS, respectively. Only the protein content in LB-EPS weakly correlated with the flocs size and SVI of the activated sludge. But there was no correlation between any other EPS contents or components and the physicochemical properties of the activated sludge.     

活性染料印染废水混凝脱色研究

对以活性染料为主的印染废水，用硫酸亚铁、碱式氯化铝（ＰＡＣ）加内烯酰（ＰＡＭ）进行混凝土脱色实验，并分析了脱色机理实验表明，混凝剂投加量，ＰＨ值大小均对脱色效果有影响，通过比较，该文给出了取得最佳效果的控制条件。     

用GC-MS测定空气中丙烯酸酯类污染物

采用活性碳吸附-二硫化碳解吸,GC-MS法测定空气中丙烯酸酯类污染物,采样体积为2h时,定量下限为0.5～1.6μg/m3。在吸附总量小于5mg时,活性碳吸附效率几近100%。CS2提取效率也都在95%以上。方法相对标准偏差为0.5%～3%,回收率为95%～109%。