钻井固化土资源化利用技术研究

文章采用固化土资源化利用技术对钻井固化土进行处理。该技术采用钻井固化土为原料,用砂石作为骨料,通过高效固土复合材料的研制和固化土处置配方的优选实验得到满足强度要求的建筑材料,实现固化土的再利用。目前该技术已经在元坝六井井场内部修筑约300m2的护坡。现场结果表明,应用效果较好,节约成本,经济效益较大,且能满足相关质量要求,在很大程度上解决了固化土的处置问题,为钻井废物的无害化、资源化利用提供了技术参考。

污水中氨氮的去除方法综述

探讨氨氮在污水中的形态及其处理方法,分析这些方法的原理和优劣势。氨氮去除主要包括化学法、物理法和生物法。在化学法中,关注折点氯化法、鸟粪石沉淀法和湿式催化氧化法。物理法包括空气吹脱法、沸石离子交换法和液膜法。生物法则包括硝化-反硝化法、厌氧氨氧化法和强氧化好氧生物处理法。每种氨氮污水处理技术都有其独特的优点和限制,通常需要采用多种技术的组合进行联合处理。这些联合处理方法包括沸石-化学沉淀、吹脱-离子交换、氨吹脱与氨氮分离膜处理,以及磷酸盐沉淀结合折点氯化法等。实际应用中根据污水氨氮的含量,选择更适合的处理方法,达到更好的处理效果,减少运行成本,促进资源化。

ORIGIN OF CARBONATE MATERIALS IN THE NORTHERN BASIN OF LAKE BAIKAL AND ITS RELATIONSHIP TO HOLOCENE PALEOCLIMATE

Fine-grained disseminated carbonate was found in Holocene sediments in a core taken from the northern basin of Lake Baikal. The core had two distinct facies. a terrigenous blue-clay overlain by a diatomaceous silt. Oxygen and carbon stable isotope analyses, combined with SEM , X-ray diffraction and .palynology, show that the carbonate in the blue-clay layer is pedogenic in origin, rather than biogenic or authigenic . The S C values in the blue clay suggest that the carbonate is derived from a single source , while the carbonate in the diatom-rich layer might be transported by winds from different sources. On the assumption that the carbonate was formed during the post-glacial age and was transported primarily by river runoff, the 18O isotopic values suggest that the annual temperature in the northern Baikal drainage area was about 3℃ warmer during the middle Holocene (8500-7000 a, B. P.) than during the early Holocene (11 000-8 500a, B.P.) when the blue clay was being deposited . This interpretation

川西边远区块采气废水现场处理设备及工艺研究

针对川西边远区块采气废水处理难、采气废水污染指标高的问题,研制出了一套适用于现场的川西边远区块采气废水处理设备。该设备由11个单元构成,主要采用电凝聚气浮技术、斜管沉淀工艺、筛板塔吸收-O3/H2O2复合氧化工艺、过滤-臭氧复合处理工艺4种先进的工艺技术。通过现场对比试验,确定出该设备的最佳工作参数:电气浮电流3 500A左右、处理流量8m3/h、一级沉淀池出水pH值13左右、双氧水加量7g/min左右、臭氧加量96g/min左右。现场采气废水试验结果表明,川西边远区块采气废水现场处理设备在去除采气废水COD、石油类、悬浮物等方面具有较好的效果,其出水污染指标达到了GB 8978-1996《污水综合排放标准》的一级标准,从而为川西边远区块采气废水的现场达标处理提供了一套方便、实用的设备。