MLSS

摘要： 为了适应日趋严格的污水排放标准对污水处理厂脱氮性能的新要求,在强化改良A^(2)O工艺脱氮效果的同时节省药剂投加成本,通过批次实验确定最佳污泥浓度范围和乙酸钠投加量,并进行为期35 d运行实践。实验结果表明当乙酸钠投加量一定时,随着生物池内污泥浓度的增加,NO_(3)^(-)-N及TN的浓度逐渐下降,脱氮性能提高,当污泥质量浓度高于4.91 g/L时,NO_(3)^(-)-N及TN浓度的下降趋势变缓;当污泥质量浓度为4.268 g/L,乙酸钠投加量在30~180 mg/L范围内增加时,随着C/N值逐步增加,反硝化脱氮性能显著增强。当乙酸钠投加量为120 mg/L时,对应C/N值为5.05,此时TN质量浓度低于15 mg/L,可达到《城镇污水处理厂污染物排放标准》(GB 18918—2002)表1中一级A标准。运行实践过程中控制污泥质量浓度为4~5 g/L,乙酸钠投加量为120 mg/L,每日出水均可达标排放;通过合理投加乙酸钠,每年可节省药剂成本300万元。研究成果能够有效提高污水处理厂脱氮效率,可获得明显的社会效益和经济效益,可为污水处理厂实际运行提供参考。

摘要： 随着污水管网的不断完善,武鸣污水处理厂的进水TP由原1.5 mg/L增加至4.3 mg/L,需采用化学除磷的手段辅助削减TP.生物除磷方面,在不投加任何化学除磷药剂的前提下,将MLSS从5000～8000 mg/L降至3000～4000 mg/L,缩短污泥泥龄,提高生物除磷效率;化学除磷方面,通过重新比选除磷药剂及重新选取药剂投加点,确定使用PAC(食品级,Al2O3有效含量≥28％),并采用同步投加与后置投加相结合的多点投加方式,使出水TP稳定在0.5 mg/L以下.

摘要： 为了降低能耗,节约污水处理的成本,同时达到同步去除碳、氮、磷的效能,采用低溶解氧污泥微膨胀SBR工艺过程进行实验研究.采用污泥微膨胀SBR工艺过程使水样处于低溶解氧状态,MLSS在2000～3000 mg/L之间.同时,测定控制过程中不同时间点的水样中的氨氮质量浓度、溶解性正磷酸盐含量以及COD值.结果表明,在低溶解氧SBR工艺过程中,COD去除率达到90％,正磷酸盐去除率达到58％,氨氮去除率达到83％.由此可见,采用低溶解氧污泥微膨胀法处理污水的方法能够有效实现同步去除碳、氮、磷的目的.

摘要： 针对湖南某污水处理厂出水总磷偏高、除磷药剂成本高的问题,对影响生物除磷的指标数据进行了分析,得出排泥不足和曝气效果不佳是导致出水总磷偏高的主要原因.通过运行工艺调整,提高了总磷去除效率,降低了药耗成本,确保了出水总磷稳定达标.

摘要： This study analyzed the transformation of nitrogenous substances during the process of sludge ozone reduction by examining the variations in different forms of nitrogen with ozone dosage.The dissolution law of each nitrogenous substance during the reduction process was determined by using a linear regression equation.The results indicate that when the ozone dosage was 0.15 g O3 · g-1 total suspended solids (TSS),the total nitrogen (TN) increase rate reached the highest level at 437.44％,and mixed liquor suspended solids (MLSS) were reduced by 41.28％.Therefore,0.15 g O3 · (g TSS)-1 was regarded as the optimal ozone dosage.X-ray photoelectron spectroscopy (XPS) showed that the dissolved NH4+-N and NO3--N were created mainly by the release of ammonium as well as nitrate nitrogen in the sludge flocs and that Kjeldahl nitrogen was produced mainly from the dissolution of intracellular proteins,which accounted for 93.46％ of dissolved TN at the ozone dosage of 0.30 g O3 · (g TSS)-1.The TN mathematical model relevant to △MLSS and ozone concentration was determined to be TN =△MLSS · (0.000 96 C +0.011 2) =e3.992 · D0.774 · C1.466 · (0.000 96 C +0.011 2),and the range of application isMLSS=4000-5000 mg L-1,20mg · L-1 ＜C＜40mg · L-1,0.02 gO3 · (gTSS)-1 ＜ D ＜0.30 g O3 · (g TSS)-1.%以污泥臭氧减量化过程中含氮物质的转变为研究核心,分析了减量过程中不同形态氮溶出物随臭氧投量的变化,并利用线性回归方程归纳出污泥溶解过程中各形态含氮物质的溶出规律.结果表明:当臭氧投量在0.15gO3·(g TSS)-1时,TN的增长速率最高,增幅达437.44％,此时MLSS减少了41.28％,可将0.15 g O3·(g TSS)-1视为臭氧最佳投量;XPS图谱显示,溶出的NH4*-N、NO3--N主要由污泥絮体中铵态氮和硝态氮的释放所致,而凯氏氮主要来源于胞内蛋白质-N(有机态凯氏氮)的溶出,在臭氧投量为0.30 gO3·(g TSS)-1时,凯氏氮占溶出TN的93.46％;最终建立TN关于△MLSS、臭氧投量D和臭氧浓度C的数学模型为TN=△MLSS·(0.000 96C +0.011 2)=e3.992·D0.774·C1.466·(0,000 96C +0.011 2),该模型应用范围为MLSS =4 000 ～5000 mg·L-1,20 mg·L-1 ＜C＜40 mg·L-,0.02 g O3·(g TSS)-1＜D ＜0.30 g O3·(g TSS)-1.

摘要： 为考察硅藻土对城市污水处理厂除磷的影响,以辽宁朝阳某城市污水处理厂A2O处理系统为研究对象,重点分析了硅藻土的微观结构,投加硅藻土对A2O处理系统MLSS、MLVSS、MLSS/MLVSS、 微生物及磷去除率的影响.结果表明,硅藻土具有多孔结构,在A2O处理系统中投加硅藻土能够显著提高MLSS、MLVSS、MLSS/MLVSS,微生物明显也增多,且有助于对磷的去除.

摘要： Wastewater treatment using Sequencing Batch Reactor (SBR) technology is one of the state-of-the art wastewater management systems. In this technology equalization, biological treatment and secondary clarification are performed in a single reactor in a time control sequence. SBR system is idler for the areas where the available land is limited, since it operates in less space and very cost effective even on small scales. The control of the operational parameters during the process of biological wastewater treatment is often complicated due to the dynamic change in the composition and characteristics of the raw wastewater, flow rates and other parameters influencing the complex nature of the treatment process and the process in SBR has a unique cyclic batch operation. The performance of the SBR was studied using pilot and real plant at Puducherry. The parameters considered in this study are flow, Mixed Liquor Suspended Solids (MLSS), pH, temperature, influent and effluent of Total Suspended Solids (TSS), Biochemical Oxygen Demand (BOD) and Chemical Oxygen Demand (COD). As a part of the study, the effect of constant flow and varying flow on the organic loading of the influent TSS, BOD and COD and their influence on the organic load of the effluent parameters were examined to identify the level of significance of the parameters in relation to the flow. The impact of flow on other parameters was also examined. The experimental data obtained from pilot and real plants were analyzed using multi variate statistical analyses like correlation analysis, Principal Component Analysis (PCA) and Analysis of variance (ANOVA). The statistical analysis revealed that constant flow had no significant role and the influent parameters alone had the critical role, whereas varying flow as well as the influent parameters had the significant role on the performance of SBR.

摘要： 作者将柳沟河污水曝气实验反应堆,疫苗接种,雁儿湾两个池塘污泥污水处理厂,并通过控制活性污泥的驯化栽培的环境条件,在这个过程中,通过显微镜检查参数和微生物,分析污泥培养过程中污泥的特性变化规律和污水处理的效果,并调整负载改变曝气循环,研究活性污泥的性能负载变化,菌胶团和废水水质的影响。

摘要： 以沈阳市某污水处理厂普通絮状活性污泥为接种污泥，采用人工配制的模拟废水，在SBR反应器中进行好氧颗粒污泥培养实验研究。结果表明：通过运行方式的调整及参数的改变，在第33 d培养出成熟的好氧颗粒污泥，污泥粒径在2~3 mm左右；在一次曝气后增加静置缺氧段，有利于脱氮，系统中COD、NH -N去除率可分别达到93%和92%；好氧3颗粒污泥系统中含有大量的原生动物和后生动物，系统中污泥状态良好，处理效果好。采用逐步提高生活污水比例的方法对颗粒污泥进行驯化，当生活污水的比例达到100%时，系统出水 COD＜50mg/L，NH -N＜5 mg/L，达到3 GB18918—2002一级A出水标准。%In this study, by use of common flocculent activated sludge from a municipal wastewater treatment plant as inoculation sludge and synthetic domestic wastewater, aerobic granular sludge was cultivated in a sequencing batch reactor (SBR). The results showed that by adjustment of operation mode and change of parameters, mature aerobic granular sludge was successfully cultivated on the thirty-third day, with size of about 2~3 mm. Addition of anoxic stationary phase after one time of aeration was helpful for denitrification and the removal rate of COD and NH -N could reach to 93% and 92% respectively. The aerobic granular3 sludge contained a large amount of protozoa and metazoan, indicating that the performance of sludge and the treatment effect was good. Then, the aerobic granular sludge was acclimated by gradual increasing of the domestic sewage ratio. When the sewage ratio reached to 100%, COD and NH -N in the effluent was less than 50 mg/L and 5 mg/L, meeting the level A effluent limits regulated in3 GB18918-2002.

摘要： In order to comprehend viscous sludge bulking, a lab-scale sequencing batch reactor (SBR) wasused through operating under three different phases：sludge activity domestication phase, viscous bulkingsetup phase and maintenance phase. The variations of sludge settleability, nitrogen removal performance andsludge flocs morphology during each phase were investigated. The results show that when pH is in the rangeof 7.5~7.9 and temperature is around 23±1°C, viscous bulking can be easily induced by increasing organicloading rate (OLR) to above 0.50 kgCOD·(kgMLSS·d)-1. Meanwhile, nitrification performance, sludgesettleability and effluent quality were all deteriorated obviously. The average effluent suspended solids (ESS)concentration was increased from 5 mg·L-1to 35 mg·L-1, leading to a sharp deduction of mixed liquidsuspended solids (MLSS). Under viscous bulking condition, sludge volume index (SVI) had a closerelationship with phosphorus removal performance. Nitrification could not proceed completely when OLRwas so large, leading to an obvious nitrite accumulation. The Extracellular Polymeric Substances (EPS) andviscosity were bigger than those under normal condition. Sludge flocs morphology was loose and porous.Nitrification performance can be improved quickly after decreasing OLR, but the viscous bulking induced byhigh OLR can not be inhibited just by decreasing OLR alone. Above all, viscous bulking is an morbiditycondition in activated sludge process which should be avoided to deteriorate sludge settleability, effluentquality and nitrification process.

摘要： In order to comprehend viscous sludge bulking, a lab-scale sequencing batch reactor (SBR) wasused through operating under three different phases：sludge activity domestication phase, viscous bulkingsetup phase and maintenance phase. The variations of sludge settleability, nitrogen removal performance andsludge flocs morphology during each phase were investigated. The results show that when pH is in the rangeof 7.5~7.9 and temperature is around 23±1°C, viscous bulking can be easily induced by increasing organicloading rate (OLR) to above 0.50 kgCOD·(kgMLSS·d)-1. Meanwhile, nitrification performance, sludgesettleability and effluent quality were all deteriorated obviously. The average effluent suspended solids (ESS)concentration was increased from 5 mg·L-1to 35 mg·L-1, leading to a sharp deduction of mixed liquidsuspended solids (MLSS). Under viscous bulking condition, sludge volume index (SVI) had a closerelationship with phosphorus removal performance. Nitrification could not proceed completely when OLRwas so large, leading to an obvious nitrite accumulation. The Extracellular Polymeric Substances (EPS) andviscosity were bigger than those under normal condition. Sludge flocs morphology was loose and porous.Nitrification performance can be improved quickly after decreasing OLR, but the viscous bulking induced byhigh OLR can not be inhibited just by decreasing OLR alone. Above all, viscous bulking is an morbiditycondition in activated sludge process which should be avoided to deteriorate sludge settleability, effluentquality and nitrification process.

摘要： In order to comprehend viscous sludge bulking, a lab-scale sequencing batch reactor (SBR) wasused through operating under three different phases：sludge activity domestication phase, viscous bulkingsetup phase and maintenance phase. The variations of sludge settleability, nitrogen removal performance andsludge flocs morphology during each phase were investigated. The results show that when pH is in the rangeof 7.5~7.9 and temperature is around 23±1°C, viscous bulking can be easily induced by increasing organicloading rate (OLR) to above 0.50 kgCOD·(kgMLSS·d)-1. Meanwhile, nitrification performance, sludgesettleability and effluent quality were all deteriorated obviously. The average effluent suspended solids (ESS)concentration was increased from 5 mg·L-1to 35 mg·L-1, leading to a sharp deduction of mixed liquidsuspended solids (MLSS). Under viscous bulking condition, sludge volume index (SVI) had a closerelationship with phosphorus removal performance. Nitrification could not proceed completely when OLRwas so large, leading to an obvious nitrite accumulation. The Extracellular Polymeric Substances (EPS) andviscosity were bigger than those under normal condition. Sludge flocs morphology was loose and porous.Nitrification performance can be improved quickly after decreasing OLR, but the viscous bulking induced byhigh OLR can not be inhibited just by decreasing OLR alone. Above all, viscous bulking is an morbiditycondition in activated sludge process which should be avoided to deteriorate sludge settleability, effluentquality and nitrification process.

摘要： In order to comprehend viscous sludge bulking, a lab-scale sequencing batch reactor (SBR) wasused through operating under three different phases：sludge activity domestication phase, viscous bulkingsetup phase and maintenance phase. The variations of sludge settleability, nitrogen removal performance andsludge flocs morphology during each phase were investigated. The results show that when pH is in the rangeof 7.5~7.9 and temperature is around 23±1°C, viscous bulking can be easily induced by increasing organicloading rate (OLR) to above 0.50 kgCOD·(kgMLSS·d)-1. Meanwhile, nitrification performance, sludgesettleability and effluent quality were all deteriorated obviously. The average effluent suspended solids (ESS)concentration was increased from 5 mg·L-1to 35 mg·L-1, leading to a sharp deduction of mixed liquidsuspended solids (MLSS). Under viscous bulking condition, sludge volume index (SVI) had a closerelationship with phosphorus removal performance. Nitrification could not proceed completely when OLRwas so large, leading to an obvious nitrite accumulation. The Extracellular Polymeric Substances (EPS) andviscosity were bigger than those under normal condition. Sludge flocs morphology was loose and porous.Nitrification performance can be improved quickly after decreasing OLR, but the viscous bulking induced byhigh OLR can not be inhibited just by decreasing OLR alone. Above all, viscous bulking is an morbiditycondition in activated sludge process which should be avoided to deteriorate sludge settleability, effluentquality and nitrification process.

摘要： In order to comprehend viscous sludge bulking, a lab-scale sequencing batch reactor (SBR) wasused through operating under three different phases：sludge activity domestication phase, viscous bulkingsetup phase and maintenance phase. The variations of sludge settleability, nitrogen removal performance andsludge flocs morphology during each phase were investigated. The results show that when pH is in the rangeof 7.5~7.9 and temperature is around 23±1°C, viscous bulking can be easily induced by increasing organicloading rate (OLR) to above 0.50 kgCOD·(kgMLSS·d)-1. Meanwhile, nitrification performance, sludgesettleability and effluent quality were all deteriorated obviously. The average effluent suspended solids (ESS)concentration was increased from 5 mg·L-1to 35 mg·L-1, leading to a sharp deduction of mixed liquidsuspended solids (MLSS). Under viscous bulking condition, sludge volume index (SVI) had a closerelationship with phosphorus removal performance. Nitrification could not proceed completely when OLRwas so large, leading to an obvious nitrite accumulation. The Extracellular Polymeric Substances (EPS) andviscosity were bigger than those under normal condition. Sludge flocs morphology was loose and porous.Nitrification performance can be improved quickly after decreasing OLR, but the viscous bulking induced byhigh OLR can not be inhibited just by decreasing OLR alone. Above all, viscous bulking is an morbiditycondition in activated sludge process which should be avoided to deteriorate sludge settleability, effluentquality and nitrification process.

摘要： 本发明公开了一种可目测水质浊度的MLSS检测装置，具体涉及水质检测技术领域，包括检测外壳，所述检测外壳的正面开设有三个限位卡槽，所述限位卡槽的内壁与限位卡套的外表面相互卡接，所述限位卡套内卡接有收集桶，所述收集桶的外表面套接有轴承，所述轴承的背面与限位卡套的正面固定连接。本发明通过设置离心水泵、磁力贴片和控制阀，使得该检测装置只需将控制阀为底的方式即可实现对收集桶的放置，避免了样品水质出现泄漏的情况，同时多个收集桶的设计使得该检测装置在采集以及检测水质样品时无需对检测装置内部的液体进行清理，降低了因水质样品残留而导致检测水质的数据出现误差的情况，同时，保障了该检测装置对水质的检测效率。

摘要： 本发明提供了一种自动调节MLSS浓度的膜生物反应器，包括膜池和进水系统，所述膜池包括反应区和污泥区，所述进水系统包括主进水管、三通流量控制阀、反应区分进水管、污泥区分进水管、控制器和MLSS传感器，所述MLSS传感器设置在所述膜池之内，所述主进水管的出水口通过所述三通流量控制阀分别与所述反应区分进水管的进水口、污泥区分进水管的进水口连接，所述反应区分进水管的出水口与所述膜池的反应区连接，所述污泥区分进水管的出水口与所述膜池的污泥区连接，所述控制器分别与所述MLSS传感器、三通流量控制阀电连接。本发明的有益效果是：在不增加额外的能耗的基础上，保持膜池内MLSS浓度恒定。

摘要： 本发明是一种高盐生化系统中MLSS的测定方法，该方法基于重量法原理，测定步骤包括滤纸称重、混合液过滤、滤纸烘干和称重，在混合液经滤纸过滤后，用含盐清水冲洗滤纸和表面截留的污泥。本发明方法可获得MLSS和MLVSS的数值，继而用于计算MLVSS/MLSS和SVI。采用此改进方法测得的MLSS与实际MLSS值更为接近，降低溶解性无机盐对MLSS测定的影响，而且为不同盐度条件下的MLSS、MLVSS、MLVSS/MLSS和SVI的标准化比较提供方便。

摘要： 本实用新型涉及一种基于DO和MLSS监测的高效曝气生化系统，包括：鼓风机、微孔曝气器、PLC自控装置、DO测试仪、调节阀、污泥回流泵、MLSS测试仪，所述的微孔曝气器设置在好氧池和兼氧池的底部、通过气体输送管道与鼓风机的出风口相连接；在好氧池的出水处设置DO测试仪；在兼氧池设置DO测试仪；在气体输送管道的在好氧池与兼氧池的支管上设置调节阀；在好氧池的出水处设置MLSS测试仪；在兼氧池设置MLSS测试仪；在污泥回流管道的在好氧池与兼氧池的支管上设置调节阀。本实用新型可根据DO数值的变化智能调节鼓风机的风量，根据MLSS数值的变化自动控制污泥回流泵的转速和水量、调节阀的开度，自动化程度高、节能效果好、数据精度高。

摘要： 本实用新型涉及一种基于MLSS监测的高效曝气生化系统，包括：污泥回流泵、PLC自控装置、MLSS测试仪、调节阀；在好氧池的出水处设置MLSS测试仪；在兼氧池设置MLSS测试仪；在污泥输送管道的在好氧池与兼氧池的支管上设置调节阀，所述的MLSS测试仪与PLC自控装置电连接，所述的PLC自控装置与污泥回流泵、调节阀电连接。PLC自控装置根据MLSS测试仪所采集的MLSS数值的变化，自动控制污泥回流泵的转速和水量、调节阀的开度，使污泥回流泵的工况不再单一，达到优化好氧生化段的生化效果和节能目的。本实用新型可根据MLSS数值的变化智能调节污泥回流泵的风量，自动化程度高、节能效果好、数据精度高。