连续流改进A2/O反应器去污效果及分相培养研究

以生活污水为原水,在常温（25-33℃）条件下采用连续流改进A2/O反应器进行脱氮除磷实验研究。系统内COD降解,TN与TP去除主要在活性污泥段完成,而NH4＋-N去除基本在生物接触氧化区完成。从中沉池出水硝态氮影响因素分析可知,选用较高的有机负荷有利于实现系统内分相培养。泥龄对实现系统内微生物异养菌和自养菌的分相培养具有关键影响。当泥龄〈10 d,可实现系统内异养菌与自养菌的分相培养。     

Dibenzo-p-dioxins in the environment from ceramics and pottery produced from ball clay mined in the United States

Processed ball clay samples used in the production of ceramics and samples of the ceramic products were collected and analyzed for the presence and concentration of the 2,3,7,8-Cl substituted polychlorinated dibenzo-p-dioxins and -furans (PCDDs/PCDFs). The processed ball clay had average PCDD concentrations of 3.2 ng/g toxic equivalents, a congener profile, and isomer distribution consistent with those found previously in raw ball clay. The PCDF concentrations were below the average limit of detection (LOD) of 0.5 pg/g. The final fired ceramic products were found to be free of PCDDs/PCDFs at the LODs. A consideration of the conditions involved in the firing process suggests that the PCDDs, if not destroyed, may be released to the atmosphere and could represent an as yet unidentified source of dioxins to the environment. In addition, the PCDDs in clay dust generated during manufacturing operations may represent a potential occupational exposure.     

球磨－煅烧法制备Fe3O4-CuxO及其活化Oxone降解盐酸左氧氟沙星

采用机械球磨-煅烧方法成功制备Fe₃O₄-Cu_xO复合材料,利用SEM、XRD与多功能磁学测量系统等手段对复合材料进行表征,并对其催化Oxone降解水体中盐酸左氧氟沙星的性能进行评估.考察了煅烧温度、球磨时Fe与CuO的质量比对该复合材料的催化性能影响.复合材料降解盐酸左氧氟沙星（LVF）实验探究了材料投加量、Oxone浓度、pH值等因素的影响.结果表明：当煅烧温度为300℃,Fe与CuO的质量比为1：1时材料催化性能最佳;重复性实验结果表明该催化剂具备较好的稳定性.当LVF的初始浓度为10mg/L时,最优降解条件为：催化剂投加量为1.4g/L、Oxone浓度为0.6mmol/L,pH值为11,反应60min后,LVF的降解率达到99.5%.淬灭实验及ESR分析证实LVF的降解是由SO₄^-·与·OH共同作用的结果.     

‘The biggest challenge is that we have to tell people how to sort.’ Waste management and the processes of negotiation of environmental citizenship in Slovenia

ABSTRACT

This article departs from the concept of environmental citizenship. Focus is on the experiences of representatives for Slovenian municipal waste management companies and business sector service companies engaged in the collection and recycling of electronic waste, and their attempts to increase the amount of separately collected municipal waste. They do so by engaging the Slovenian citizens to undertake separate sorting. Theoretically, the focus is on the processes of negotiating citizen engagement and, more specifically, attempts to incentivise the separate sorting of municipal waste which, it is argued, also helps foster the image of a particular kind of citizen. This article understands the informants’ experiences as being intimately linked to, and constitutive of, contemporary waste management discourses where attention is increasingly paid to the activities and behaviours of individual citizens. Noteworthy, while the concept of environmental citizenship can be said to allow citizens to practise sustainability (a concept that is otherwise seemingly quite abstract), the waste management policies of today seem to be increasingly relying on this active citizenship. It is at the intersection of these phenomenon that the negotiation practices of Slovenian waste management authorities happen.     

泰州石化水污染治理达标整体技术设计总结

泰州石化总厂的污水处理工程为例，介绍现有的炼油企业通过合理系统划分，将高、低浓度污水分质处理，并采取适当的污水处理方法(隔离式BAF及膜法A／O等)，实现全厂污水达标排放。     

建立开放系统,发展西北半干旱地区农业

我国西北半干旱地区是我国农业中最不发达地区之一,其主要特征是封闭或半封闭式的有机农业传统,低投入、低功能、低产出。本文讨论了有争议的几种模式,提出了建立开放系统的原则与具体生产建议。     

接触氧化—超滤膜分离工艺在中水处理中的应用研究

论述了接触氧化—超滤膜分离技术在中水处理中的应用,提出了针对性试验和运行参数,并对不同膜和技术工艺进行了对比。     

城镇粪便、易腐性生活垃圾、生活污水真空分类收运系统及资源化

对我国城镇粪便、易腐性生活垃圾、生活污水传统排放和处理模式的缺陷和存在的问题进行了分析。提出城镇粪便、易腐性生活垃圾、污水新型分类收运及快速制造有机复合肥系统，对其流程、原理、技术指标和社会、生态、经济意义做了简明的介绍，并与传统重力冲水排污系统从多方面进行了比较。     

镉与铜的分离与测定研究

设计出离子交换分离法分离与测定Cd2 和Cu2 的实验方案及实验步骤,摸索出分离与测定Cd2 和Cu2 的最佳实验条件.     

改性纤维球处理武钢热轧含油废水中试研究

在武钢热轧水处理车间,采用改性纤维球过滤技术,进行了规模为8m3/h的含油废水中试研究。中试装置连续运行了90d,过滤后出水水质为:含油≤5mg/L,悬浮物<7mg/L;反洗水回流到平流沉淀池循环处理。试验结果表明,改性纤维球是一种优良的过滤材料,截污容量大,容易再生,处理后的水质基本达到生产用水要求。