共查询到18条相似文献,搜索用时 359 毫秒
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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
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PAC和PAM复合絮凝剂在洗涤剂废水处理中的应用研究 总被引:7,自引:0,他引:7
絮凝性能的实验研究表明,PAC和PAM复合絮凝剂是处理洗涤剂废水的理想絮凝剂,采用该复合絮凝剂处理洗涤剂废水时的最佳操作条件如下:PAC用量为1.5g/L,PAM用量为10mg/L,pH值约为7.0,絮凝搅拌速度60r/min,絮凝搅拌时间30min,沉淀池沉淀时间为30min。该实验结果在中试规模的应用中得到了较好地验证,中试试验研究表明采用PAC和PAM复合絮凝剂处理洗涤剂废水,CODCr和LAS(直链烷基苯璜酸钠)去除率分别可达85%和72%以上,有效地解决了LAS难以生物降解等问题。 相似文献
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氧化-吸附法联合处理油田酸化废水 总被引:9,自引:2,他引:7
实验采用双氧水氧化与活性炭吸附联合作用的方法处理酸化废水,并确定最佳工艺条件。结果表明,该法能有效降低酸化废水中污染物含量,CODCr去除率可达82.8%。与先用双氧水氧化,然后用活性炭吸附分步法处理比较,该法操作简单,节省费用,而且可提高处理效果。 相似文献
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采用多级内循环厌氧反应器MIC/上升式厌氧反应器UASB串联工艺处理柠檬酸生产排放的高浓度有机废水,其中厌氧处理段的COD去除率>94%,整体COD去除率可达98.3%左右.最终排放口出水COD平均值为190 mg/L,pH值为6~9,达到柠檬酸行业废水排放标准. 相似文献
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针对陕北某气井稠化酸返排液pH值低、SS高、COD高、矿化度高和透光率低的特点,提出采用微电解-Fenton联合工艺处理稠化酸返排液,以期达到降低返排液COD,为后续混凝和活性炭吸附处理提供有利条件。试验结果表明:在铁屑20g、活性炭15g、H_2O_2 900mg/L,微电解-Fenton联合处理2h;调节pH值至7.5左右,PAC 700mg/L、PAM 50mg/L,混凝处理30min;活性炭40g/L,活性炭吸附处理40min的条件下,处理后的稠化酸返排液pH值为7.50、SS降至15mg/L、COD降至109.3mg/L、透光率提高至99.5%,水质达到GB 8978—1996《污水综合排放标准》二级标准。 相似文献
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Gkhan Ekrem Üstün Seval Kutlu Akal Solmaz Akn Birgül 《Resources, Conservation and Recycling》2007,52(2):425-440
Regeneration studies of wastewater effluent from an organized industrial district (OID) for possible reuse in textile industry as process water was investigated. Advanced treatment methods including Fenton process, polyaluminium chloride (PAC) coagulation and ion exchange were applied on OID effluent. In Fenton process removal efficiencies for suspended solids (SS), chemical oxygen demand (COD), SAC436 (spectral absorption coefficient), SAC525 and SAC620 were determined 61%, 36%, 35%, 49% and 67%, respectively. After Fenton process, wastewater samples were coagulated with PAC. Optimum removal efficiencies for SS, COD, Fe ion, SAC436, SAC525 and SAC620 were determined 83%, 18%, 93%, 32%, 36% and 58%, respectively. Ion exchange experiments were conducted on chemically coagulated wastewater samples to improve the quality of wastewater. Optimum dosage of resins was determined. The experiments revealed that 1:1 resin ratio (20 mL H-type resin:20 mL OH-type resin) gave the best removal rates for the parameters considered in this study. Study results indicated that quality of the wastewater was suitable for the process water characteristics of textile industry and unit wastewater treatment cost was determined as 2.54 €/m3. 相似文献
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采用二级混凝-气浮-水解酸化-SBR-过滤工艺,对某汽车制造厂的混合废水(包括脱脂废水、电泳废水、磷化废水和生活污水等)进行处理。经过对处理工艺进出水主要水质指标连续1个月的监测,发现COD去除率可达92.5%,SS去除率可达95.2%,NH3-N去除率可达58%,TP去除率可达96.7%,出水水质符合国家《污水综合排放标准》(GB8978—1996)一级排放标准,吨水处理成本为1.6元/t,系统运行稳定,具有明显的经济、环保和社会效益。t 相似文献
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以奇台太极华力食品有限公司番茄废水处理工程实例为依据,介绍了采用ABR厌氧+完全混合活性污泥法工艺在处理番茄加工废水的设计、调试及运行情况。经过2年运行,其进水COD在700~1 500mg/L之间,最大处理水量达到4 000m3/d;出水COD在40~70mg/L之间,COD去除率达到97%。处理出水可以稳定达到污水综合排放二级标准。ABR+完全混合活性污泥法工艺具有启动快,调试时间短,工程造价低的优点,尤其适宜处理番茄等间歇时间长工作时间短的季节性生产污水。 相似文献
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Antibiotic formulation effluent is well known for its important contribution to environmental pollution due to its fluctuating and recalcitrant nature. In the present study, the chemical treatability of penicillin formulation effluent (average filtered COD(o)=830 mg/l; average soluble COD(o)=615 mg/l; pH(o)=6.9) bearing the active substances penicillin Amoxicillin Trihydrate (C(16)H(19)N(3)O(5)S.3H(2)O) and the beta-lactamase inhibitor Potassium Clavulanate (C(8)H(8)KNO(5)) has been investigated. For this purpose, the penicillin formulation effluent was subjected to ozonation (applied ozone dose=2500 mg/(lxh)) at varying pH (2.5-12.0) and O(3)+H(2)O(2) (perozonation) at different initial H(2)O(2) concentrations (=2-40 mM) and pH 10.5. According to the experimental results, the overall Chemical Oxygen Demand (COD) removal efficiency varied between 10 and 56% for ozonation and 30% (no H(2)O(2)) and 83% (20 mM H(2)O(2)) for the O(3)+H(2)O(2) process. The addition of H(2)O(2) improved the COD removal rates considerably even at the lowest studied H(2)O(2) concentration. An optimum H(2)O(2) concentration of 20 mM existed at which the highest COD removal efficiency and abatement kinetics were obtained. The ozone absorption rate ranged between 53% (ozonation) and 68% (perozonation). An ozone input of 800 mg/l in 20 min was sufficient to achieve the highest BOD(5)/COD (biodegradability) ratio (=0.45) and BOD(5) value (109 mg/l) for the pre-treated penicillin formulation effluent. After the establishment of optimum ozonation and perozonation conditions, mixtures of synthetic domestic wastewater+raw, ozonated and perozonated penicillin formulation effluent were subjected to biological activated sludge treatment at a food-to-microorganisms (F/M) ratio of 0.23 mg COD/(mg MLSSxd), using a consortium of acclimated microorganisms. COD removal efficiencies of the activated sludge process were 71, 81 and 72% for pharmaceutical wastewater containing synthetic domestic wastewater mixed with either raw, ozonated or perozonated formulation effluent, respectively. The ultimate COD value obtained after 24-h biotreatment of the synthetic domestic wastewater+pre-ozonated formulation effluent mixture was around 100 mg/l instead of 180 mg/l which was the final COD obtained for the wastewater mixture containing raw formulation effluent, indicating that pre-ozonation at least partially removed the non-biodegradable COD fraction of the formulation effluent. 相似文献
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Electrocoagulation with aluminum electrodes was used to treat the vegetable oil refinery wastewater (VORW) in a batch reactor. The effects of operating parameters such as pH, current density, PAC (poly aluminum chloride) dosage and Na(2)SO(4) dosage on the removal of organics and COD removal efficiency have been investigated. It has been shown that the removal efficiency of COD increased with the increasing applied current density and increasing PAC and Na(2)SO(4) dosage and the most effective removal capacity was achieved at the pH 7. The results indicate that electrocoagulation is very efficient and able to achieve 98.9% COD removal in 90 min at 35 mAcm(-2) with a specific electrical energy consumption of 42 kWh(kgCOD(removed))(-1). The effluent was very clear and its quality exceeded the direct discharge standard. 相似文献