微絮凝--直接过滤中应用阳离子型高分子絮凝剂处理低浊水的研究

通过大量试验研究了微絮凝－直接过滤工艺中使用阳离子型高分子絮凝综合效能。结果表明：使用阳离子型高分子比传统无机混凝剂投药量更低,除浊效果更好,过滤周期更长,并且对阳离子型高分子絮凝剂的过滤性能进行了研究探讨。     

微絮凝—直接过滤中应用阳离子型高分子絮凝剂处理低浊水的研究

通过大量试验研究了微絮凝—直接过滤工艺中使用阳离子型高分子絮凝过滤综合效能 .结果表明 :使用阳离子型高分子比传统无机混凝剂投药量更低、除浊效果更好、过滤周期更长 .并且对阳离子型高分子絮凝剂的过滤性能进行了研究探讨 .     

微电流-生物膜法处理生活污水的实验研究

采用微电流-好氧生物膜法和微电流-厌氧生物膜法两套装置处理生活污水,研究结果表明:微电流-好氧生物膜法对CODcr处理效果优于微电流-厌氧生物膜法,但对氨氮的去除效果不及微电流-厌氧生物膜法。本实验的最佳水力停留时间为2h,CODcr的去除率为75%,氨氮的去除率为94%。     

低温低浊水的微絮凝-深床直接过滤技术研究

在低温低浊水(T＜10℃，C0＜10NTU)处理中，采用常规强化处理流程的处理效果不理想．本文采用微絮凝-深床直接过滤工艺技术，针对过滤过程中下列参数：滤料粒径、原水浊度、原水温度、水处理剂种类、投药量等，比较各种情况下的直接过滤效果，为低温低浊水难净化的问题提供了一条有效的处理途径．     

生物接触氧化过滤处理生活污水的试验研究

对生物接触氧化过滤处理生活污水进行了试验研究,探讨了水力停留时间与供气量处理效果的影响,结果表明：在气水比3：1,水力停留时间6．5h,进入CODcr195.03-459.36mg/L条件下,平均CODcr及SS去除率分别可达76．71％,和73．63％以上,平均TN去除率为31．87％,出水CODcr 降至27．45－82．15mg/L,SS降至24－46mg/L。     

直接过滤过滤截留系数的试验研究

通过对滤速ｖ和滤层滤料粒径ｄ进行双因素试验，研究了直接过滤时过滤截留系数与滤速，滤层粒径的关系，建立了一定条件下的数学模型。     

微絮凝-超滤工艺处理洗浴废水研究

通过微絮凝-超滤工艺处理洗浴废水的试验表明,该工艺对原水中CODcr、浊度和阴离子表面活性剂（LAS）都具有较好的去除效果．当聚合氯化铝（PAC）的投加量为20mg／L时,微絮凝-超滤工艺对CODcr、浊度和LAS的去除率分别为75％．80％,94％．97％和74％～83％,其出水水质均能达到城市杂用水水质标准．     

微絮凝过滤法处理含油废水试验研究

针对机电和机械加工行业排水中乳化油的特性，提出了微絮凝过滤的处理工艺，通过试验，肯定了其良 好的除油效果，并对影响除油效率的因素进行了分析讨论，最后确定工艺流程和设计参数的合理选择。     

微絮凝/超滤组合工艺处理低浊度海水

采用微絮凝/超滤技术对天津汉沽盐场海水进行了处理，试验结果表明：在混凝剂和次氯酸钠的最佳投量分别为2．8mg／L、3．3mg／L时，浊度、COD的去除率分别从98．00％，36．0％提高到99．99％和57．0％，超滤对SDI的去除率较微絮凝提高了53％．而且微絮凝工艺减缓了海水对膜的污染．     

生活污水水解酸化的研究

研究了水解(酸化)反应器的工作特点及其对生活污水的处理效果。研究表明,水解(酸化)反应器对CODCr、BOD5和SS的去除率分别可达到73.2%、58.3%和24.2%,废水的BOD5/CODCr值可由0.42提高到0.67,确定最佳水力停留时间为3h。水解(酸化)反应器出水再经后续好氧处理后,可以考虑回用。     

船舶生活污水特性及处理装置研究

结合国内外现状及实船调查资料，从船舶生活污水的产生、排水系统的布设、船舶生活污水的水力特性及其污染负荷量的确定，对船舶生活污水的污染特征进行研究，研究认为所排放的生活污水水量、水质随不同船型和卫生设备类型及排水系统形式有较大差异．对船舶生活污水处理装置的分类、国内外研究现状及船舶环境影响因素进行分析，指出了处理装置的研究方向、重点和难点，研究认为膜生物法用于船舶生活污水处理具有良好的应用前景．     

MBR-SNAD工艺处理生活污水效能及微生物特征

为考察基于膜生物反应器(MBR)的同步亚硝化厌氧氨氧化反硝化(SNAD)工艺处理生活污水的可行性,在SNAD工艺稳定运行的MBR中逐步加入生活污水,同时微调曝气量及HRT等参数,考察生活污水中污染物的去除效果,通过物料衡算计算不同阶段反应器内的脱氮路径,同时通过克隆-测序技术分析了微生物种群特征.结果表明,MBR-SNAD工艺可以实现生活污水中C、N及SS的同时高效去除,总氮去除负荷达0.65 kg/(m3·d),出水氨氮小于5 mg/L;COD去除率达87%,出水COD小于50 mg/L;浊度去除率达99%,出水浊度在1 NTU以下,SS在10 mg/L以下,达到城镇污水处理厂污染物排放标准(GB18918—2002)的一级A排放标准.反应器中存在约12%的反硝化脱氮和88%的全程自养脱氮(CANON),实现了异养脱氮和自养脱氮的协同合作.好氧氨氧化菌、厌氧氨氧化菌和反硝化菌共存于系统内.MBR-SNAD是处理生活污水的适宜工艺.     

C-CBR一体化生物反应器处理农村生活污水研究

为改善农村日益严重的水环境问题,根据倒置A²/O的基本原理,进行了连续流连续生化反应器(continuous-flow continuous biochemical reactor, C-CBR)一体化生物反应器处理农村生活污水的研究。研究结果表明:在平均水温23 ℃、水力停留时间12.9 h以及混合液回流比400%的运行条件下,原水COD、NH⁺₄-N、TN和TP质量浓度分别为242、35、56、4.2 mg/L时,平均去除率分别为74.3%、53.8%、50.1%和60.3%,出水平均质量浓度分别为60.6、15.9、27.1、1.7 mg/L,出水水质满足《城镇污水处理厂污染物排放标准》二级排放标准,经计算运行费用仅为0.55元/t。     

曝气生物滤池处理生活污水亚硝化的实验研究

为探究低氨氮生活污水亚硝化的可行性,采用高负荷生物滤池-上向流曝气生物滤池(UBAF)两段式反应器考察水流方向对高负荷生物滤池去除COD、氨氮效果及温度、DO对UBAF亚硝化效果的影响．结果表明,在水力负荷为0.58 m³／(m²·h)、COD容积负荷为2.30 kg／(m³·d)、气水比为3.6∶1、常温条件下,上向流进水方式能够获得稳定的低COD、高氨氮的二级出水．在水温30～33 ℃、DO 2.5～3.0 mg／L、进水pH 7.8～8.1条件下,UBAF出水氨氮平均转化率为84.58 ％,亚硝氮平均质量浓度达23.01 mg／L．UBAF反应器中各种含氮化合物沿程变化及FISH检测表明,在反应器末段存在一定程度的同步亚硝化厌氧氨氧化作用．该两段式反应器能驯化单独的脱碳、脱氮优势菌群,实现低氨氮生活污水的亚硝化．     

Effects of temperature on the degradation pathway of domestic sewage in upflow anaerobic sludge blanked reactor

To understand the anaerobic degradation pathway of domestic sewage,three lab-scale upflow anaerobic sludge blanked reactors (UASB) were employed to study the degradation pathway of different particle size and the effect of temperature on this process.Under the operation conditions of the hydraulic retention time of 24 h,the MLVSS of approximate 11200 mg·L-1 and the water temperature at 10,15 and 20℃,the overall degradation pathway of soluble fraction was characterized according to zero-order kinetics.As for the colloidal fraction (between 0.45 and 4.5 μm),the degradation processes followed a first-order kinetic,and should firstly disintegrated into soluble fraction before finally degrading.In contrast,suspended solids (bigger than 4.5 μm) degraded to soluble and colloidal fractions according to first-order kinetics,and the colloidal fraction originating from suspended solids further degraded into soluble fraction which had the same degradation kinetics as the original soluble fraction.There existed the difference of temperature effect on different fraction degradation.Under the temperature at 20,15 and 10 ℃,the first-order rate constant of suspended solids depredating into collide was 4.97,3.01 and 1.01 d-1 respectively.Whereas the degradation of collide to soluble fraction was slightly affected by the temperature change.On the other hand,the zero-order degradation rate constant of soluble fraction was 0.26,0.18 g and 0.12 gCOD·gVSS-1d-1,respectively.     

Effects of temperature on the degradation pathway of domestic sewage in upfiow anaerobic sludge blanked reactor

To understand the anaerobic degradation pathway of domestic sewage,three lab-scale upflow anaerobic sludge blanked reactors(UASB)were employed to study the degradation pathway of different particle size and the effect of temperature on this process.Under the operation conditions of the hydraulic retention time of 24 h,the MI,VSS of approximate 11200 mg· L-1 and the water temperature at 10,15 and 20℃,the overall degradation pathway of soluble fraction was characterized according to zero-order kinetics.As for the colloidal fraction(between 0.45 and 4.5 μm),the degradation processes followed a first-order kinetic,and should firstly disintegrated into soluble fraction before finally degrading.In contrast,suspended solids(bigger than 4.5 μm)degraded to soluble and colloidal fractions according to first-order kinetics,and the colloidal fraction originating from suspended solids further degraded into soluble fraction which had the same degradation kinetics as the original soluble fraction.There existed the difference of temperature effect on different fraction degradation.Under the temperature at 20,15 and 10 ℃,the first-order rate constant of suspended solids depredating into collide was 4.97,3.01 and 1.01 d-1 respectively.Whereas the degradation of collide to soluble fraction was slightly affected by the temperature change.On the other hand,the zero-order degradation rate constant of soluble fraction was 0.26,0.18 g and 0.12 gCOD · gVSS-1d-1,respectively.     

气水交替膜生物反应器处理生活污水效能

为更好地将气水交替膜生物反应器应用于实际工程,通过中试试验,考察该反应器对实际生活污水的处理效果．结果表明,在实际污水碳氮比为4的条件下,AMBR对COD和NH4＋一N的去除率在90％左右,出水质量浓度分别低于20mg／L和5mg／L,但对TN的去除能力有限,出水平均质量浓度为22．4mg／L,去除率仅为38％．通过在...     

SFRC subjected to domestic sewage and sustained load

The article aimed to study the durability of steel fiber reinforced concrete under the coupled sewage-loading according to compressive strength,flexural strength,compressive strength corrosion coefficient,flexural strength corrosion coefficient,compressive strength balance coefficient,flexural strength balance coefficient.Through the homemade load frame applied to design specimens,the pre-loading level are equivalent the damage intensity of 0%,10%,30% and 50% four different ways.The experimental results show that the performance of concrete down gradually and sustaining load aggravated the degree of domestic sewage attacking concrete after six month;under different stress states,the more loading levels,the more serious domestic sewage attacked the steel fiber reinforced concrete.It is proved that the concrete damage can be inhibited by adding the steel fiber,when steel fiber volume fraction is 1.0%,the corrosion resistance of concrete is best.