高藻期给水厂排泥水处理系统优化研究

针对高温高藻期给水厂排泥水的特点,研究了排泥水处理负荷、加药条件、搅拌条件、回流污泥控制及排泥控制等因素对排泥水处理系统运行的影响情况,提出了排泥水处理系统的优化建议.     

离心脱水机在闵行水厂排泥水处理工程中的应用

闵行水厂一车间选用离心脱水机作为排泥水处理工程脱水设备，就此分析研究了影响污泥离心脱水效果的各种因素，并总结出该工程的最佳运行工艺参数，为今后黄浦江水系水厂排泥水处理设备选择提供了依据。     

水厂生产废水结团凝聚处理的中试研究

利用结团凝聚技术 ,以西安市某水厂生产废水为处理对象进行了处理规模为 10～ 39 5m3/h的中试研究。研究结果表明 ,用结团凝聚技术处理水厂生产废水是完全可行的 ,且具有处理效率高、出水水质好、排泥浓度高等特点。当原水含水率在 98 5 3%～ 99 96 %范围内变化时 ,水力负荷可达 4 4 5～ 17 2 5mm/s ,出水浊度 2～ 2 0NTU ,连续排泥含水率 93 8%～ 96 % ,排泥可直接进入脱水机脱水 ;相应的工艺操作参数为 :PAM投量为 2 2～ 4 7mg/g干泥 ,PAC(Al2 O3)投量为 1mg/g干泥。     

大型成套板框机脱水系统在台州水厂的应用

台州水厂采用了大型成套板框机脱水系统对沉淀池排泥水进行脱水处理。工作流程包括进泥、脱水、卸泥、滤布清洗等四个部分。介绍了设备选型计算及结构特点。台州水厂所用2台压滤机冲洗消耗水量为4.27m3/d(冲洗周期按7d计),单操作周期(120min)总电耗约为19kW.h。     

造粒流化床浓缩技术处理给水厂排泥水的中试研究

以南方某给水厂排泥水为处理对象,利用造粒流化床污泥浓缩工艺进行了处理规模为 1-2．5 m3／h的中试研究。研究结果表明,对于排泥水有机物、藻类含量高的南方水厂而言,采用一 体化造粒流化床浓缩工艺进行处理是切实可行的,且具有处理效率高、出泥含水率低、脱水性能好、 出水浊度低等特点;中试条件下,流化床水流上升速度可达38-50 cm／min,最佳搅拌转速为 5 r／min,PAM药耗比普通重力浓缩-调质工艺节省25％-40％,污泥含水率可从99％降至95％- 97％。并通过试验确定了相关工艺参数。     

净水厂生产排泥水处理工艺研究与设计

通过对净水厂生产排泥水的产生和水质特性进行分析,确定沉淀池排泥水和滤池反冲洗废水为净水厂排泥水的主要组成,结合设计干泥量的计算确定排泥水处理规模,在分析排泥水处理系统工艺流程布置特点的基础上对排泥水收集、调节、浓缩和脱水工艺进行分析,并对其中排水池、排泥池、浓缩池、平衡池、脱水工艺和场地布置的设计要点进行总结。     

长江水源水厂排泥水处理研究

对长江水源水厂排泥水处理进行了研究,确定了长江水源水悬浮固体含量与浊度的关系,对水厂干泥量和排泥水总量进行了估算;通过动态浓缩试验,确定了斜板浓缩池运行优化条件;测定了排泥水的颗粒粒径分布、固体成分组成和污泥比阻;并简要介绍了污泥机械脱水和泥饼处置方法.     

梅林水厂絮凝沉淀池积泥问题的综合治理

针对梅林水厂絮凝沉淀池在生产运行中出现池壁挂泥 ,池底积泥及红虫孳生的实际问题 ,进行了深入的研究与分析。提出了对回收水加药 ,改造排泥系统 ,优化排泥方式 ,在沉淀池放养鱼苗等多项综合治理措施。     

北京市第九水厂污泥处理工程设计简介

简要介绍了北京市第九水厂污泥处理工程及其工艺设计。工程运行表明处理后上清液出水可以均匀回流至配水井重复使用，而经板框压滤机脱水的泥饼含水率约为５０％～６０％。     

广西首座废水零排放水厂建成通水

南宁市三津水厂一期工程总投资2·98亿元,其中利用日本国际协力银行贷款1800万美元。工程建设规模为20万m3/d,占地8·53万m2。水厂以邕江为水源,净水工艺流程和主要构筑物为:取水泵房→机械混合池→网格絮凝池→平流沉淀池→V型滤池→叠合清水池→吸水井→送水泵房→城市管网。该水厂的水泵电机、自控系统、化验仪器、管网检漏仪器等设备大多从美国、日本、德国、法国、瑞士等国引进。还从日本引进了具有国际先进水平的全套废水处理系统,将滤池反冲洗水和沉淀池排泥水收集浓缩,回收利用上清液并对污泥进行脱水压缩成泥饼外运填埋。该水厂是…     

A new side stream process for easily degradable industrial waste waters to avoid sludge bulking.

A new treatment scheme for the treatment of easily biodegradable industrial waste waters has been developed. The side stream treatment of dairy waste water with the excess sludge from the domestic treatment line of the regional treatment plant Bad V?slau has been operated successfully for a period of three years during which the industrial load stemming from the dairy increased from 800 kg COD/d to 2,500 kg COD/d with peak loads up to 5,000 kg/d. Despite of the increased load to the treatment plant the total aeration tank volume had not been increased. This treatment is performed in an existing aeration tank of the WWTP (V = 1,800 m3) which is now used as contact tank for the combined aeration of dairy waste water and excess sludge from the domestic treatment line (volume aeration tank = 15,000 m3). In this tank the easily degradable substrate from the industrial waste is mainly adsorbed to the biological sludge and after a mechanical dewatering transferred to the anaerobic digester where it yields in an increased gas production. The filtrate of the dewatering process is completely free from biodegradable material and can without danger of bulking be fed to the aeration tank of the domestic treatment line. The new process has proven to be extremely flexible since already now daily peak loads exceeding the design load by more then 60% could be treated in the plant without any problems. Compared to other alternatives for the dairy waste water treatment that were investigated during this study, the new side stream process is very advantageous. No other pre-treatment process for industrial waste water could have been operated under comparable loading conditions without severe operating problems.     

人工湿地技术在给水工程中的应用

通过分析人工湿地技术的原理和布置,阐述其处理特点和池型布置方面的区别,并详细介绍人工湿地技术在水源生态湿地和污泥处理质能转化这两种给水工程中的应用,突出该技术在今后给水工程中广阔的应用前景.污泥处理质能转化技术在净水厂设计中可用于厂区生产排水直接处理或浓缩后排泥水处理,也可用于浓缩池上清液以及脱水机滤液达标排放处理.     

猎德污水处理厂污泥系统除臭工程设计

根据已建污水处理厂的实际情况,对污泥浓缩池采用加高盖臭气收集方法,对污泥脱水间采用重点区域强化抽吸的臭气收集方法,并采用洗涤-生物滤床联合除臭工艺进行臭气处理;对污泥码头采用喷洒天然植物提取液除臭工艺进行除臭.介绍了除臭工程的设计参数和运行情况,工程实施后,污水处理厂的恶臭状况得到明显改善.     

南京市城北污水处理厂工程设计

南京市城北污水处理厂设计规模30万m~3/d,其污水处理工艺采用一体化活性污泥法,污泥处理工艺采用浓缩脱水带式一体机,臭气处理采用分散收集、化学法集中除臭。介绍了工程设计参数、处理工艺流程及其设计特点。并详细阐述了除臭工艺流程及相关运行参数,净化后去除率达99.2％。     

污泥浓缩脱水投药量优化控制的研究

城市污水处理厂污泥浓缩脱水的药剂消耗是主要的运行费用。通过北京市高碑店污水 处理厂连续两个月的试验,考察了污泥浓缩脱水最佳投配比与污泥浓度之间的关系并建立了优化控 制模型。用该模型进行了一个月的试生产,结果表明,对加药量进行优化控制相对于人工控制不仅 保证了处理效果,同时也有效地降低了运行费用。     

Application of heat shock protein assay and proteome assay to water from wastewater treatment plant.

In this study we applied bioassay using Chinese hamster ovary (CHO) cells with a heat shock protein (HSP) 47 promoter to the effluent of the wastewater treatment plants in Sapporo and we observed the statistically significant HSP production. This implied the effluent contained some organic matter which can stress the CHO cells. To investigate the possible causes of the toxicity of the effluent, we applied the assay to the rejected water from the sludge treatment plant, the mixtures of sewage and rejected water. The evolution of HSP production during the aerobic decay process and thickening process of sludge was also examined. These assay results showed that dissolved microbial products generated and/or released from activated sludge during its decay process in the aeration tank and during thickening and dewatering process in the sludge treatment train contributed to develop HSP production. The proteomics analysis was also applied to the effluent and detected the production of elongation factor 1beta. This result implies that the effluent from wastewater treatment plants may cause changes in cell proteins involved in allergic reaction.     

Sludge as source of energy and revenue.

Sludge is a residue/product from wastewater treatment plants and contains most of the contaminants released during human activities. Some stringent environmental regulations on sludge treatment and disposal exist in many countries. This has resulted in increasing interest in sludge treatment methods that encourage sludge reduction and improvement in biogas production during anaerobic digestion processes. This work demonstrates the first exploitation of valuable energy from homogenised sludge at technical scale with mass reduction. The optimal combination of sludge homogenisation at relatively low pressures using a modified high-pressure homogeniser led to the success of this unique project. Results showed that about 30% more energy could be obtained from thickened and disrupted sludge than from untreated samples. The energy produced was higher than that invested during disruption and digestion processes. About 23% sludge reduction was also observed with no increase in chemical oxygen demand. This new process can produce extra energy for local electrification and heating the digester while the sludge reduction provides economic benefits. Concentration of sludge causes reduction in investment cost on digester as well as reduction in operational time for sludge dewatering.     

The impact of sequential ozonation--aerobic treatment on the enhancement of sludge dewaterability.

Sludge ozonation processes have mostly been considered as regards the minimisation of the bio-solids while the improvement of sludge dewatering was more a welcoming side-effect. However, some papers announce a decrease of the dewatering efficiency by sludge ozonation. This indicates the presence of an optimisation potential, which is the subject of this study. Improvement of sludge dewaterability was found for an ozone dose which is much lower than that used for sludge minimisation. The repeated ozone and aerobic treatment allows further strong improvement of dewatering efficiencies. The key for this process optimisation is a well-balanced ozone dose related to the subsequent aerobic treatment time.     

A new approach to improve sludge dewatering using a semi-continuous hydraulic press system.

In future, it will be necessary to incinerate an increasing proportion of the sludge produced by public wastewater treatment. In this context, equipment for more effective dewatering of sewage sludge is required. A hydraulic press system (Bucher HP) which has been used to date in the food industry could represent an alternative to the sludge dewatering systems currently used. The basic suitability of this press system was demonstrated in comprehensive industrial-scale trials at the Glarnerland STP (Switzerland). Dry solids contents of up to 43% were measured in the pressed sludge. Currently, the optimization of individual process parameters is being investigated in a pilot plant at the Schwelm STP operated by Wupperverband (Germany).