共查询到19条相似文献,搜索用时 156 毫秒
1.
PAC和PASS对印染废水的混凝效果研究 总被引:5,自引:0,他引:5
主要研究PAC和PASS混凝剂对高浓度和低浓度印染废水的混凝处理效果。确定了PAC处理高浓度印染废水(pH:4.39;色度:18750倍;COD:6480;浊度:1462)的最佳pH、混凝时间、投药量为5~7、8min、24mL/L;PASS处理低浓度印染废水(pH:10.16;色度:2020倍;COD:168;浊度:36.4)的最佳pH、混凝时间、投药量为6~7、15min、12mL/L。PAC处理高浓度的印染废水效果较好,处理低浓度印染废水的效果较差;PASS处理低浓度印染废水的处理效果比PAC要好。 相似文献
2.
实验以处理金属表面所产生的磷化废水为研究对象,系统地分析了在新型混凝剂的使用过程中,pH值、温度、石灰投入量、沉降时间、助剂A等因素对脱磷效果的影响。结果表明,含磷量为18mg/L、COD为300mg/L、SS为150mg/L、pH值为5.7~6.5的废水,石灰投入量为300mg/L、沉降时间为10min左右、温度为25℃、pH值调节至9.0、加入5mL助剂A处理后,废水中磷含量为0.25~0.35mg/L、COD为80mg/L、SS为60mg/L,满足《污水综合排放标准》(GB8978—1996)中的一级标准。 相似文献
3.
利用强化混凝工艺对含聚采油废水进行深度处理。在以PFS作为主混凝剂,Potenflo1315和Potenflo1365作为助凝剂的强化混凝实验中,分别考察了pH值、PFS投加浓度以及有机助凝剂Potenflo1365和Potenflo1315的投加浓度对含聚采油废水的处理效果。实验结果表明:在pH值为5.0时,当投加浓度为150 mg/L的PFS与2.5 mg/L的Potenflo1365复配后,对含聚采油废水的处理效果最佳,COD_(Cr)去除率达到88.8%,浊度去除率达到98.1%,经处理后废水主要指标可以达到GB 8978—1996《污水综合排放标准》一级标准。 相似文献
4.
文章以硫酸铝、硫酸铁与聚二甲基二烯丙基氯化铵(PDM)为原料,制备PAFS-PDM复合混凝剂并表征其结构形态,同时考察了pH值、混凝剂投加量对油田钻井废水中COD的去除率以及溶液中Zeta电位的影响,为复合混凝剂的开发及使用提供一定的参考。研究结果表明:当PAFS-PDM复合混凝剂的投加量为8 000 mg/L、pH值为5时对塔里木油田钻井废水中COD的去除率达93.05%,此时溶液中Zeta电位较低。XRD衍射及SEM表征结果显示,制备的PAFS-PDM复合混凝剂中存在铝铁—羟基聚合物,微观形态下复合混凝剂将聚合形成的扇形片状结构再相互连接成发散立体结构,从而增大了比表面积,提高了混凝剂的吸附架桥能力,结合Zeta电位分析得出PAFS-PDM复合混凝剂为阳离子型混凝剂,而且具有较强的电中和能力。 相似文献
5.
6.
针对化学混凝处理含油污泥中混凝剂投加量大而混凝效率较低的问题,通过实验研究了Cl^-对混凝剂处理含油污泥絮凝效率的影响。实验中采用抽滤的方法来测定絮凝效率。实验结果表明Cl^-是影响絮凝效率的重要因素,C1^-<10000mg/L时,A12(SO4)3、PAC混凝效果较好,Cl^->20000mg/L时,PAM的混凝效果较好。 相似文献
7.
8.
合成了一种新型树枝状聚合物TE-6CSSNa,并对比氢氧化钠(NaOH)和二甲基二硫代氨基甲酸钠(SDD),重点考察pH和投加量对实际电镀废水中Cu和Ni去除效果的影响。结果表明,pH和投加量都对重金属的去除有较大影响。随着pH或投加量的增加,Cu和Ni残留浓度呈现先降低后升高的趋势。废水中ρ(Cu)=6.82 mg/L、ρ(Ni)=64.36 mg/L,单独使用NaOH或SDD时,出水都无法达到《电镀污染物排放标准》(GB 21900-2008)表3中Cu和Ni特别排放限值要求(Cu0.3 mg/L,Ni0.1 mg/L),而采用TE-6CSSNa处理废水,在pH=8.6、投加量为275 mg/L、反应5 min、静置30 min时,残留Ni浓度远低于表3的排放限值,残留Cu浓度甚至低于检出限,说明TE-6CSSNa处理效果明显优于NaOH和SDD,具有重大的实用意义。 相似文献
9.
10.
11.
In this research, the performance of Polyaluminium Chloride (PAC) and Polyaluminium Chloride sludge (PACS) as coagulants for acid red 119 (AR119) dye removal from aqueous solutions were compared. The sample of PACS was collected from "Baba Sheikh Ali" water treatment plant (Isfahan, Iran) where PAC is used as a coagulant in the coagulation/flocculation process. A response surface methodology was applied to evaluate the simple and combined effects of the operating variables including initial pH, coagulant dosage and initial dye concentration and to optimize the operating conditions of the treatment process. Results reveal that the optimal conditions for dye removal were initial pH 3.42, coagulant dosage of 4.55 g dried PACS/L and initial dye concentration of 140 mg/L for PACS, while the optimal initial pH, coagulant dosage and initial dye concentration for PAC were 3.8, 57 mg/L and 140 mg/L, respectively. Under these optimal values of process parameters, the dye removal efficiency of 94.1% and 95.25% was observed for PACS and PAC, respectively. Although lower amount of PAC in comparison with PACS was needed for specific dye removal, the reuse of PACS as a low-cost material can offer some advantages such as high efficiency for AR119 dye removal and economic savings on overall water and wastewater treatment plant operation costs. 相似文献
12.
13.
混凝沉降法处理洗衣废水的实验研究 总被引:2,自引:1,他引:1
洗涤废水含有表面活性剂和磷酸盐物质,直接排入水体会造成水体的污染,增加给水处理厂的处理难度,甚至会引起水体富营养化。本实验是通过投加PAC和PAM絮凝沉降联合活性炭吸附来处理商业洗涤废水,以去除废水中的COD。实验表明:采用PAC PAM 活性炭工艺处理洗衣废水的效果较好,投药过程COD的去除率可以达到60%以上,经过活性炭过滤后,总的去除率可以达到86%。出水ODD可以降至在50mg/L左右。 相似文献
14.
15.
Characterization and coagulation of a polyaluminum chloride (PAC) coagulant with high Al13 content 总被引:1,自引:0,他引:1
A polyaluminum chloride (PAC) coagulant was prepared from AlCl3 x 6H2O and Na2CO3. The Al13 species in PAC was separated and purified by the SO4(2-)/Ba2+ deposition-replacement method, and characterized by 27Al-NMR and XRD. From 27Al-NMR spectroscopy, it was found that PAC obtained after separation and purification contained more Al13 (PAC-Al13, for short) than original PAC before separation and purification. In XRD spectra, a strong Al13 signal appeared in the range of 2theta from 5 to 25 degrees. Jar tests were performed to test the coagulation efficiency of AlCl3, PAC and PAC-Al13 in treating synthetic or actual water samples. Compared with PAC and AlCl3, PAC-Al13 gives the best results for turbidity, humic acid and color removal, and achieves the highest charge-neutralizing ability. Under the study conditions, PAC-Al13 gave about 90% humic acid removal and almost 100% reactive blue dye removal when its dosages were 4.0 and 15 mg/L as Al, respectively. The Al13 species has a higher positive charge and is the most effective polymeric Al species in water and wastewater treatment. 相似文献
16.
17.
一种高效复合絮凝剂对多种废水的处理效果 总被引:1,自引:0,他引:1
用聚合氯化铝(PAC)和聚丙烯酰胺(PAM)复配成复合絮凝剂(PAC+PAM)应用于污染河水、生活污水、工业废水和餐饮废水等6种废水的处理,结果表明。PAC、PAM、PAC+PAM对污染河水的CODc。SS、浊度有显著降低作用,PAC+PAM的净水效果明显优于PAC和PAM;PAC+PAM对6种废水中COD的去除率为81.5%~90.4%,平均84.6%。对SS的去除率为81.9%~96.5%,平均88.9%,对浊度的去除率为91.3%-98.0%,平均95.1%;处理后悬浮物基本被絮凝沉降,水体变得较清澈透明,异味或臭味消除。说明本PAC+PAM复合絮凝剂对各种废水均有良好的净水效果,具有重要的应用价值。 相似文献
18.
对制浆漂白废水采用混凝处理方法,实验结果表明,用聚合氯化铝(PAC)和聚丙烯酰胺为混凝剂,其投加量分别为200mg/l和2mg/l,经一步混凝处理,出水完全达到国家排放标准,且可进一步回用生产。 相似文献
19.
在已开发的含油废水处理装置的基础上,对其整体结构、旋分分离部分进行改进,并筛选出性能优良的填料。将原处理装置的单向旋分器改进为双向旋分器、采用YS填料之后,对石油类浓度低于400mg/L的含油废水,经该装置处理后,石油类的去除率达到90%以上;石油类浓度低于80mg/L的含油废水,经该装置处理后,石油类的去除率达95%,石油类的浓度小于10mg/L,达到国家《污水综合排放标准》(GB8798-1996)二级标准的要求。改进后的装置对高、中、低不同浓度石油类的含油废水均有较好的处理效果。 相似文献