Characteristics of nitrogen and phosphorus removal in SBR and SBBR with different ammonium loading rates

Laboratory scale experiments were conducted to study the deterioration of enhanced biological phosphorus removal (EBPR) due to influent ammonium concentration, and to compare the performance of two types of sequencing batch reactor (SBR) systems, a conventional SBR and sequencing batch biofilm reactor (SBBR). Both in SBR and SBBR, the total nitrogen removal efficiency decreased from 100% to 53% and from 87.5% to 54.4%, respectively, with the increase of influent ammonium concentration from 20 mg/l to 80 mg/l. When the influent ammonium concentration was as low as 20 mg/l (C: N: P=200: 20: 15), denitrifying glycogen-accumulating organisms (DGAOs) were successfully grown and activated by using glucose as a sole carbon source in a lab-scale anaerobic-oxic-anoxic (A₂O) SBR. In the SBR, due to the effect of incomplete denitrification and pH drop, the nitrogen and phosphorus removal efficiency decreased from 77% to 33.3% when the influent ammonium concentration increased from 20 mg/l to 80 mg/l. However, in the SBBR, simultaneous nitrification/denitrification (SND) occurred, and the nitrification rate in the aerobic phase did not change remarkably in spite of the increase in influent ammonium concentration. Phosphorus removal was not affected by the increase of influent ammonium concentration.     

序批式生物膜法处理低碳城市水高效除磷的试验

针对碳、氮、磷比例失调碳源偏低城市污水,因碳源不足而降低脱氮除磷效率的难题及连续流生物膜法除磷率低的缺点,为提高生物膜的除磷效率,通过构建厌氧/好氧交替运行的序批式生物膜反应器(SBBR),合理调控厌氧和好氧段的运行时间,处理广州地区碳源偏低的城市污水,研究其生物除磷的效果和控制影响因素.结果显示,在无需额外添加碳源的条件下,当进水TP浓度为1.65～7.10mg/L,出水TP浓度可在0.085～0.5mg/L之间,去除率达到90%以上.在此基础上,对SBBR的厌氧和好氧段的工艺特性及控制影响因素进行系统分析,指出厌氧/好氧交替运行的工序是SBBR处理城市污水高效除磷的前提和基础,而确保厌氧磷的最大有效释放是SBBR系统高效除磷的关键.     

序批式生物膜法处理城市生活垃圾厌氧消化液脱氮的影响因素

探讨了序批式生物膜法处理有机生活垃圾厌氧消化液脱氮的影响因素,如温度、有机负荷、pH值和DO等,选择了最佳的运行条件.当控制DO在3.5～5.0 mg·L-1、pH值7.2～8.0、温度25℃左右时,反应器中有机物和氨氮的去除效果较好.     

生物海绵铁载体最佳使用参数研究

通过生物海绵铁复合载体与SBBR结合处理城市生活污水,研究了影响铁离子释放的主要影响因素pH、 DO以及复合载体结合方式对处理效果的影响,最终确定出最佳的设计使用参数。结果表明,复合载体以B方式结合时脱氮除磷效果最佳;进水pH在中性或偏碱性条件下,脱氮除磷效果最佳,氨氮去除率为90%, TP去除率为86%; DO为2~4 mg/L时, COD去除率提高,达到76%, TN、 TP去除率均在85%以上。研究为载体的实际化应用打下了基础,也为同类研究提供了参考。     

冲厕海水SBBR处理工艺中悬浮填料的选型

悬浮填料作为微生物赖以栖息的场所,是批式生物膜反应器的关键技术之一。基于冲厕海水水质特性,提出SBBR处理冲厕海水用悬浮填料的选型原则：密度应接近海水,比表面积较大,水力学和理化特性优良。筛选三种悬浮填料进行了挂膜试验,结果表明,改性聚丙烯柱状填料更适合用于冲厕海水处理。     

SBBR不同填料类型的挂膜启动

填料是SBBR反应器不可或缺的组成部分,填料的选择在很大程度上决定了反应器的处理效果和推广使用。在挂膜启动过程中,通过几种不同类型填料进行比较得出:流动填料挂膜时出水水质较差,生物膜容易发生脱落;固定悬挂形式的化工填料挂膜效果较好,但化工原料的大量使用不符合环保和经济原则;生物填料类型则容易腐败或取材不易,但挂膜效果明显,有很大的发展空间。     

SBBR工艺及其在水处理中的运用

研究了SBBR工艺的工作原理,对SBBR工艺进行了分类,探讨了SBBR工艺的特点和SBBR工艺的运行影响因素,详细地阐述了SBBR工艺在水处理中的应用,得出了SBBR在处理工业废水和生活污水方面均能达到很好的处理效果的结论。     

Abatement of 4-Chlorophenol in Aqueous Phase by Ozonation Coupled with a Sequencing Batch Biofilm Reactor (SBBR)

The aim of this work was to assess the mineralization of 100 and 200 mg L^?1 4-chlorophenol (4-CP) solutions by ozonation-biological treatment. The results show that starting from a 4-CP initial concentration from 100 to 500 mg L^?1 and using an ozone flow rate of 5.44 and 7.57 g h^?1, 4-CP was completely removed. A kinetic constant around 9·10^?2 min^?1 was calculated for the ozone direct attack. The biodegradability (BOD₅/COD) of the pre-ozonated solutions increased from 0 until a range between 0.2–0.37. The combination of the ozonation and aerobic biological treatment in an aerobic sequencing batch biofilm reactor (SBBR) gave an abatement of more than 90% of the initial TOC.     

SBBR工艺中亚硝酸型同步硝化反硝化的过程控制

采用序批式生物膜反应器（SBBR）,在生物膜培养驯化初期实现了亚硝酸盐硝化,通过调节曝气量控制系统内的溶解氧浓度,实现了SBBR工艺中的亚硝酸型同步硝化反硝化生物脱氮,出水中亚硝酸盐累积率（NO2^--N／NO2^--N）达到90％左右,TN低于8mg·L^-1,去除率为71．4％～85．6％。为了实现SBBR工艺中亚硝酸型同步硝化反硝化的过程控制,考察了亚硝酸型同步硝化反硝化生物脱氮过程中DO、pH和ORP的变化规律。试验结果表明,DO、pH和ORP的变化规律与反应器内COD的降解和“三氮”的转化有良好的相关性,并在不同温度条件下的亚硝酸型同步硝化反硝化硝化过程中具有良好的重现性,可以依据DO、pH和ORP在变化曲线上的特征点作为SBBR法亚硝酸型同步硝化反硝化的过程控制参数。     

序批式生物膜法处理腈纶废水的试验研究

采用序批式生物膜法(SBBR)处理实际腈纶污水,研究SBBR工艺处理腈纶废水的可行性和在厌氧、好氧模式下处理腈纶废水的优化参数。结果表明,SBBR工艺对腈纶废水具有较好的处理效果,COD去除率达到50%以上;在厌氧HRT为16 h、曝气时间为5 h、DO的质量浓度为4.5 mg.L-1时,对TOC和TN的去除率分别为70%和44.9%,对特征污染物DMAC和丙烯腈的去除率为100%;腈纶废水中含有难生物降解物质,单一的靠生物处理很难达到排放标准,出水需要后续处理。