共查询到18条相似文献,搜索用时 171 毫秒
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投加调理剂与表面活性剂对污泥脱水性能的影响 总被引:2,自引:0,他引:2
研究了无机调理剂(FeCl3和CaO)与表面活性剂的联合作用对污泥絮体特征、沉降性能和脱水性能的影响。结果表明,当FeCl3、CaO、表面活性剂的投加量分别为0.067、0.134、0.054 g/g时,泥饼的含水率最低,为62.97%,且沉降性能得到了明显的改善。通过观察处理前后污泥絮体的粒径分布和扫描电镜(SEM)照片,发现污泥的絮团被破坏,粒径明显变小。由于无机调理剂和表面活性剂的联合作用能够使污泥絮体表面的EPS脱落,减少结合水的含量,从而改善了污泥的脱水性能。 相似文献
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对近年来广泛研究和使用的有机高分子污泥脱水絮凝剂进行了综述,有机高分子污泥脱水絮凝剂按合成方法分为聚合型和天然改性型;聚合型根据电荷类型分为了阳离子型、阴离子型、非离子型和两性型;天然改性型又可分为碳水化合物类和壳聚糖类。同时对污泥脱水絮凝剂的絮凝机理进行归纳阐述。对这六类污泥脱水絮凝剂的优缺点和应用现状进行了论述,并对高分子污泥脱水絮凝剂的发展前景进行了展望。 相似文献
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《Planning》2014,(23)
实验研究了中原油田低污泥污水处理新技术,结果表明:无机盐调理剂打破了CO2和HCO3-形成的平衡状态,减少了HCO3-在水处理系统的含量,从而控制外输水中主要结垢反应的发生,可以延长水处理设备使用周期;"低污泥污水处理新技术"处理后的污水水质有所提高,污泥量在现在基础上降低了31.89%。 相似文献
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通过分层堆肥提高城市污泥堆肥处理效果的研究 总被引:1,自引:0,他引:1
在不改变整个堆体中污泥和调理剂配比的情况下,研究了改变强制通风静态垛堆体的上、下层物料配比对城市污泥堆肥处理效果的影响.结果表明,在不改变整个堆体中污泥和调理剂配比的情况下,适当减少堆体下层的污泥比例并同时增加堆体上层的污泥比例,可明显改善堆肥的通风效果、促进堆体内部氧气的扩散、增加堆体的最低氧气浓度、加快堆体下层升温并带动堆体上层升温.当堆体上层的污泥和调理剂比例为1:0.5(体积比)、下层的为0.5:1(体积比)时,堆体的升温效果最为理想.在不改变整个堆体中污泥和调理剂配比的情况下,采用分层堆肥可明显提高堆肥的处理效果和处理速度. 相似文献
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对检测城市污水厂脱水污泥热值的方法进行分析,认为《煤的发热量检测方法》(GB/T 213—2008)对污泥热值的检测更适用。胜利油田城市污水厂脱水污泥按不同比例与6种调理剂复混发酵后,腐熟堆肥热值均有不同提高,均适于为单独焚烧提供热能。 相似文献
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针对现有污泥调理技术对污泥脱水性能改善效能低,难以达到现行污泥处置标准对含水率要求的问题,提出了剩余污泥氧化硫硫杆菌生物调理技术,考察了DO对剩余污泥硫杆菌生物调理系统深度脱水效能的影响.在DO为6 mg/L条件下,氧化硫硫杆菌生物调理系统调理污泥脱水后的含水率由75.5%降至63.6%;EPS中蛋白质、腐殖质、多糖分别减少为3.67、3.15、16.17mg/gVSS,污泥结合水含量从2.63 g/gDS降低至1.48 g/gDS;污泥Zeta电位从-14.9 mV降低至0.27 mV,污泥絮体颗粒平均粒径由20.19 μm增大到34.51 μm,硫杆菌生物调理系统对污泥脱水性能改善显著. 相似文献
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Dewatering problems associated with the sludge from autothermal thermophilic aerobic digestion (ATAD) of sludge, result in large chemical conditioning costs for effective dewatering. A variety of chemical conditioners were used to improve dewatering, but none of them were able to dewater the sludge as desired at acceptable conditioning doses. It was found that during the digestion process, chemical precipitation of divalent cations occurred. Some of the ATAD sludge colloids were found to have a positive zeta potential and these were thought to be the precipitated divalent cations. Sequential polymer dosing using either iron or cationic polymer, followed by anionic polymer, was found to improve dewatering. The use of anionic polymer is essential and allows the use of smaller amounts of iron or cationic polymer for effective dewatering. The use of the less expensive anionic polymer along with cationic polymers has the potential to make the use of the ATAD process more economical. 相似文献
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结合厦门污水处理厂污泥深度脱水工艺的应用情况,考察了预浓缩—FeC l3和CaO调质—高压隔膜厢式压滤机对污泥的深度脱水效果,并研究了泥饼的处理、处置和资源化利用情况。结果表明,污泥经深度脱水后,泥饼含水率60%,自然放置7 d后,含水率可进一步降至45%左右,满足填埋的要求,另外还可用于制砖和作园林绿化的土壤基质,也可作焚烧处置。污泥深度脱水过程中产生的滤液可循环利用,回流至进水处时,对出水水质影响很小,且可为脱氮过程提供碳源和碱度;回流至重力浓缩池时,可改善污泥沉降性能,提高脱水效率。与传统污泥脱水工艺相比,该工艺具有经济优势。 相似文献
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经浓缩的城市污水处理厂剩余污泥,一般是通过投加絮凝剂调质后进行机械脱水处理。絮凝剂品种选择、投加量多少都直接影响污泥的脱水效果,絮凝剂的费用也是污泥处理运行费用的重要组成部分。结合镇江污水处理厂污泥的产生、浓缩处理、脱水形式过程的生产实践,针对污泥的调质用絮凝剂的种类、用量等着手,进行絮凝剂的分析选择。提出了絮凝剂的选择应该遵循的原则以及确定污泥处理中药剂费的简易方法,同时建议城市污水处理厂在运行中应根据季节的变化调整絮凝剂用量。 相似文献
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介绍了高分子聚合物制备投加系统在福州东区水厂的应用情况,分析了无机混凝剂与阳离子聚丙烯酰胺助凝剂联用对制水成本、水质、污泥脱水等方面的影响。 相似文献
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Enhanced efficiencies of sludge dewatering and domestic wastewater treatment by using the bioflocculant from rice stover 下载免费PDF全文
Junyuan Guo Jiali Du Peilan Chen Xiandong Tan Xinyi Huang Pengfei Gan Lin Fu 《Water and Environment Journal》2017,31(1):120-126
Potential of a bioflocculant from rice stover was studied in sludge dewatering and domestic wastewater treatment. Production of this bioflocculant showed good correspondence to cell growth, after fermentation for 60 h, the fermentation liquor was obtained, from 1.0 L of which a value of 2.37 g bioflocculant can be extracted, and the main backbone of this bioflocculant was polysaccharides. Without adjusting the sludge's initial pH value of 6.5, when incubated with 18 mg/L of this bioflocculant, dry solids (DS) and specific resistance to filtration (SRF) of the typical wastewater activated sludge reached 18.5% and 4.7 × 1012 m/kg, respectively, which was better than the ones achieved by Al2(SO4)3 and FeCl3 flocculants. For domestic wastewater treatment, after treated by 12 mg/L of this bioflocculant at pH value of 7.5, removal efficiencies of chemical oxygen demand (COD) and turbidity can reach 91.8 and 89.7%, respectively, which were better than the ones achieved by the traditional flocculants such as Al2(SO4)3, FeCl3, and polyaluminum chloride (PAC). This study suggested that the bioflocculant from rice stover has great potentials as an alternative flocculant to conventional flocculants in sludge dewatering and domestic wastewater treatment. 相似文献
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把超细材料(二氧化硅、天然沸石)添加到无机絮凝剂当中,进行了城市污水处理的试验研究和猪场粪污水深度处理的初步研究.结果表明,对于城市污水,无机絮凝剂的复合使用效果好于单一絮凝剂;絮凝剂中添加少量的超细SiO2、沸石能提高絮凝效果,对COD的去除率可提高约26%,污泥体积减少32%,增加了污泥密度并降低了后续处理的难度,沉降时间也大为缩短(比未添加超细材料的絮凝剂).超细复合絮凝材料在对猪场粪污水的深度处理中也有较好的效果:添加超细材料的絮凝剂可提高对污水的脱色率,明显地提高了出水的pH值. 相似文献