亚硝酸盐型同步硝化反硝化耦合除磷研究

采用序批式活性污泥法,对人工配制的城市污水,通过控制泥龄成功实现亚硝酸盐型同步硝化反硝化,同时取得很好的生物除磷效果。实验结果显示:适宜的泥龄下,在控制适宜的COD及DO的条件下,COD、氨氮、总氮和总磷的去除率分别可达93%、99.6%、84.58%和99%。因此,利用排泥的方法控制反应器内适宜的泥龄,可以取得很好的同步脱氮除磷效果。     

氮氧化物选择性催化还原催化剂研究综述

选择性催化还原作为一种有效脱除氮氧化物的方法,在近年来得到了广泛深入的研究。文章主要综述了氮氧化物选择性催化还原研究的现状、存在的问题、讨论了今后的研究发展方向。     

混凝-间歇式活性污泥法处理炼油废水

采用混凝-间歇式活性污泥（SBR）法处理炼油废水,考察了混凝、SBR法对炼油废水的处理效果。实验结果表明：在硫酸铝、聚丙烯酰胺、CaCl2加入量分别为50,3,100mg／L的条件下,油去除率为82．7％,COD去除率为57．1％,BOD,／COD为0．24,混凝处理出水具有一定的可生化性;对混凝处理出水用SBR法进行厌氧水解2h、好氧曝气9h的生物处理后,出水COD低于150mg／L,COD去除率在80％左右。     

新型一体化3R生物反应器的设计

对新型一体化3R(carbon,nitrogen and phosphorus removal)生物反应器进行介绍,包括其结构构造、同步生物脱碳脱氮除磷机理及其运行方式。对该新型污水处理工艺所具有的独特优势进行了阐述并对反应器的设计计算进行了探讨,为该新型反应器的工业化应用提供参考。     

基于弥散光纤的二氧化钛光催化反应器

以弥散光纤(SOF)作为基体、负载纳米二氧化钛膜制备光纤式反应器,可有效提高催化剂与降解物的接触面积,提高光的传输、利用效率,克服了传统固定床反应器的不足,应用新型的光纤式反应器催化降解4-氯苯酚,降解率达到95%.     

活性污泥-生物膜一体化反应器处理生活污水性能研究

针对中小城镇污水处理的特点开发了活性污泥-生物膜复合一体化反应器,该反应器实现了反应区和沉淀区一体化,综合了活性污泥法和生物膜法的优点,具有运行稳定、占地面积少、基建投资低、管理方便的优点,并具有较好的去除有机物和脱氮除磷能力.     

PN/A-颗粒污泥工艺处理热水解污泥消化液

本研究构建了基于一体式厌氧氨氧化颗粒污泥及絮体污泥的部分硝化-厌氧氨氧化(PN/A)脱氮处理系统,通过运行参数优化调控实现了热水解污泥消化液的高效脱氮.试验结果表明,通过接种厌氧氨氧化菌(AnAOB)生物膜污泥与普通活性污泥、控制高游离氨(FA)(>20mg/L)和限制曝气(DO≤0.2mg/L)等运行条件,能够快速构建短程硝化-厌氧氨氧化反应,亚硝酸盐积累率可达85%以上,脱氮负荷达到0.60kgN/(m³·d).稀释后的热水解污泥消化液仍对AnAOB活性具有一定的抑制作用,导致反应器总氮负荷降至0.20kgN/(m³·d)以下;但系统内AnAOB丰度总体呈增加趋势,说明AnAOB的增殖未受到完全抑制.系统内混合污泥的平均中位径由53μm缓慢增长至109μm.定量PCR数据及高通量分析显示,该处理系统富集了较高纯度的An AOB,最大丰度占比可达8.06%,其优势菌属为Kuenenia菌属.此外,在第93运行周期下Kuenenia菌属在颗粒污泥的丰度占比大于AOB,为5.26%;絮体污泥中具有亚硝化效果的单胞菌属Nitrosomona...     

Improvement of the activity and SO2 tolerance of Sb-modified Mn/PG catalysts for NH3-SCR at a low temperature

A series of MnM/palygorskite (PG) (M = La, W, Mo, Sb, Mg) catalysts was prepared by the wetness co-impregnation method for low-temperature selective catalytic reduction (SCR) of NO with NH₃. Conversion efficiency followed the order Sb > Mo > La > W > Mg. A combination of various physico-chemical techniques was used to investigate the influence of Sb-modified Mn/PG catalysts. MnSb_0.156/PG catalyst showed highest NO conversion at low temperatures in the presence of SO₂ which reveals that addition of Sb oxides effectively enhances the SCR activity of catalysts. A SO₂ step-wise study showed that MnSb_0.156/PG catalyst displays higher durable resistance to SO₂ than Mn/PG catalyst, where the sulfating of active phase is greatly inhibited after Sb doping. Scanning electron microscopy and X-ray diffraction results showed that Sb loading enhances the dispersion of Mn oxides on the carrier surface. According to the results of characterization analyses, it is suggested that the main reason for the deactivation of Mn/PG is the formation of manganese sulfates which cause the permanent deactivation of Mn-based catalysts. For Sb-doped Mn/PG catalyst, SO_x ad-species formed were mainly combined with SbO_x rather than MnO_x. This preferential interaction between SbO_x and SO₂ effectively shields the MnO_x as active species from being sulfated by SO₂ resulting in the improvement of SO₂ tolerance on Sb-added catalyst. Multiple information support that, owing to the addition of Sb, original formed MnO_x crystallite has been completely transformed into highly dispersed amorphous phase accounting for higher SCR activity.     

Effects of different carbon sources on the removal of ciprofloxacin and pollutants by activated sludge: Mechanism and biodegradation

This research investigated the effects of ciprofloxacin(CIP)(0.5, 5, and 20 mg/L) on SBR systems under different carbon source conditions. Microbial community abundance and structure were determined by quantitative PCR and high-throughput sequencing, respectively.The biodegradation production of CIP and possible degradation mechanism were also studied. Results showed that CIP had adverse effects on the nutrient removal from wastewater.Compared with sodium acetate, glucose could be more effective...     

复合生物反应器中两相微生物硝化特性比较

采用间歇式复合生物反应器处理人工配制的氨氮废水,进水ＮＨ３－Ｎ浓度约为１６０ｍｇ／Ｌ,ＨＲＴ为１２ｈ,ＳＲＴ 为０ｄ,Ｎｖ可达０．１５ｇ（Ｌ．ｄ）。重点比较了反应器中附着相和悬浮相微生物的硝化特性。