Treatment of drilling wastewater using a weakly Dasic resin

Macroporous weak basic anion exchanger(D301R)was used to remove organic substances from drilling wastewater.The effect of pH,temperature and contact time on adsorption behavior was investigated in batch experiments,which indicated that the COD(Chemical Oxygen Demand)removal ratio of drilling wastewater was approximately 90%.and the COD of treated wastewater was below 70 mg/L under appropriate operating conditions.A mixed liquor of NaOH and NaCl was selected as desorbent because of its better elution performance.The results of column dynamic adsorption and regeneration showed that the COD of wastewater could be efficiently removed bv D301R resin,and the resin was easily regenerated by the selected desorbent.     

大孔树脂吸附处理邻苯二胺废水工艺研究

采用ＤＡ２０１－ＣⅢ 型大孔吸附树脂对邻苯二胺废水进行吸附和脱附处理。结果表明,在吸附流速为２ＢＶ／ｈ（ＢＶ为树脂床体积）,吸附温度为２５℃,废水初始ｐＨ 值为１３的优化条件下,单柱吸附能力为１２ＢＶ,邻苯二胺脱除率大于９８．８％;采用工业乙醇在６０℃,以１ＢＶ／ｈ的流速脱附吸附饱和的大孔树脂,当脱附剂体积为３ＢＶ时,邻苯二胺脱附率可达９９．５％;在最佳吸附和脱附条件下,连续进行１５次动态吸附－脱附实验,邻苯二胺吸附率为９８．８％ ～９９．８％,脱附率为９９．１％ ～９９．８％。     

聚硅酸铝在钻井废水处理中的应用

简单介绍了聚硅酸盐絮凝剂的研究现状,并在室内合成出絮凝剂样品聚硅酸铝,将其应用于钻井废水处理,结果发现,由于聚硅酸铝的电中和能力强,吸附架桥和卷扫作用均优于PAC,具有更好的去除COD和脱色功能.     

利用聚硅酸铝处理气田钻井废水

室内合成出絮凝剂样品聚硅酸铝,并将其应用于钻井废水处理中,结果发现,由于聚硅酸铝（PASS）的电中和能力强,吸附架桥和卷扫作用均优于聚铝（PAC）,具有更好的去除COD和脱色功能。实验中随着聚硅酸铝（PASS）用量的增加,对钻井废水COD的去除效果提高,使用2000mg/L的PASS对COD的去除率达到76.2%。当钻井废水色度和COD较高时,采用絮凝沉降处理后的出水达不到排放标准,再结合氧化、吸附深度处理,出水色度仅为10倍,COD降至200左右,达到排放标准。     

D151大孔树脂去除炼油废水中苯胺的实验研究

研究了D151大孔树脂对炼油废水中苯胺的去除效果。结果表明,在25 ℃、pH值为8 10、吸附时间为35 min的条件下,D151树脂对模拟废水中苯胺的吸附率可达86.6%;用4%盐酸作为解吸剂,解吸率可达85.7%;用D151大孔树脂吸附去除炼油厂废水中的苯胺,对未经污水处理厂直接排放的废水中苯胺的去除率可达99%以上;对炼油污水处理厂排放的废水中苯胺的去除率可达100%。     

树脂吸附法处理含邻苯二甲酸的废水

研究了含邻苯二甲酸的 1 ,4 -二羟基蒽醌染料生产废水的治理问题。采用树脂吸附工艺 ,当进水中邻苯二甲酸质量浓度为 50 0 0～ 70 0 0mg/L、CODCr为 80 0 0～ 1 0 0 0 0mg/L时 ,经处理后分别降至 1 0 0mg/L以下 ,吸附后的树脂用稀碱解吸 ,脱附率大于 99 8%。邻苯二甲酸回收率≥ 90 % ,晶体纯度高达 99 6%以上。处理后的出水可依据厂家要求回用到水洗工段作洗涤水或经简单中和后直接排放。在有效处理高浓度有机化工废水的同时实现了资源化。     

大孔碱性阴离子交换树脂法测定石油磺酸盐含量

实验以碱性阴离子交换树脂测定石油磺酸盐中有效物含量.通过紫外分光光度法绘制了石油磺酸盐标准工作曲线,并从D201,D290,D262,D301,D380树脂中进行了筛选,考察了优选树脂对石油磺酸盐的静态吸附条件.结果表明:D290优于其他树脂,在吸附平衡时间1～1.5 h、pH=2、t=20 ℃条件下树脂最大交换容量为...     

Treatment of drilling wastewater from a sulfonated mud system

Treatment of drilling wastewater from a sulfonated drilling mud system in the Shengli Oilfield, East China, was studied. The wastewater was deeply treated by a chemical coagulation-centrifugal separation-ozone catalytic oxidation combined process. The factors (i.e. pH value, chemical dosage, reaction time, etc.) influencing the treatment effect were investigated, and pH = 7 was determined as optimal for the coagulation; polymeric aluminum chloride (PAC) was selected as the optimal coagulant with a dosage of 18 g/L; cationic polyacrylamide (CPAM) with molecular weight of 8 million was selected as the optimal coagulant aid with an optimum dosage of 8 mg/L; and the optimal condition of catalytic ozonation was found to be a pH of 12 and an oxidation time of 40 min. The results showed that the combined treatment process was effective. The oil content and suspended solids content of the effluent reached the first class discharge standard according to China’s standard GB 8978-1996 (Integrated Wastewater Discharge Standard) and the chemical oxygen demand (COD) decreased to 195 mg/L from 2.34×10 4 mg/L after coagulation process and ozone oxidation at pH = 12 for 40 min.     

Cansolv中和废水对废水处理装置的影响分析及处理措施

Cansolv装置产生的酸性和碱性废水中和后,存在中和废水温度高、排水量大、COD值和还原性硫含量高等问题,造成废水处理装置废水调节池长期满液位、反渗透膜寿命衰减、处理效率下降、蒸发结晶装置设备管线堵塞严重,影响冷凝回水和产盐品质。通过采取以下工艺优化措施,减少中和废水产生量:①调整酸性废水排水位置;②降低中和废水温度;③调整文丘里管组合塔出口尾气温度;④加强尾气焚烧炉配风操作;⑤提高湿式电除雾器除酸雾的能力;⑥更换离子交换树脂和优化胺液净化装置运行程序;⑦提高除盐能力,增加臭氧催化装置和氧化装置氧化降解,降低废水COD值和还原性硫含量,确保废水处理装置运行正常。     

树脂吸附法处理2,4-D丁酯氯化含酚废水

采用国产新型大孔吸附树脂XDA对除草剂 2 ,4-D丁酯生产过程中苯酚氯化工序产生的含氯代苯酚的酸性废水进行了动态吸附处理 ,研究了影响吸附的各种因素。实验表明 ,温度 3 5～ 45℃、流率不高于每小时 6倍树脂床体积 (BV·h- 1 )的条件下 ,氯代苯酚和苯酚的除去效率在 99%以上 ;温度 65～ 80℃、质量分数为 5 %的NaOH溶液作解吸剂 ,解吸效率达到 98%。含氯代苯酚钠大约 4% (质量分数 )的碱性解吸液直接返回到氯化车间 ,苯酚钠和过量的NaOH都得到利用 ,实现了污染治理和污染物的资源化 ,具有良好的环境效益和经济效益。     

橇装式钻井废水深度连续处理装置及其应用

为解决川渝气区钻井作业过程中废水处理达标难的问题,将化学混凝、絮凝、斜板快速分离、吸附氧化、超滤和反渗透等钻井废水处理技术工艺集成为橇装式一体化处理装置。该橇装式钻井废水深度连续处理装置各处理单元既可单独使用,又可有机结合;既可满足钻井后期高浓度废水处理,又可用于钻井前期低浓度废水处理,具有广泛适用性。装置已成功应用于龙岗10、龙岗29等10口井,共处理钻井废水达2×104 m3。应用效果表明,处理后水中的COD、SS、Oil等污染物指标可达到GB 8978—1996《污水综合排放标准》中一级标准值。结论认为,该装置的成功应用可提高川渝气区钻井作业废水污染防治水平,确保钻井作业清洁生产,达到节能减排目的,可实现环境效益、社会效益和经济效益的较好统一,也可用于陆上其他油气田钻井废水的处理。     

二羧酸生产过程高COD有机废水处理工艺探讨

介绍了辽阳石化公司金兴化工厂二羧酸生产装置待处理废水水质。对UASB（升流式厌氧污泥床）＋生物接触氧化法和曝气调节＋SBR（序批式活性污泥法）两种生化处理工艺进行比较。结果表明,曝气调节＋SBR生化法具有操作简单、运行稳定、有机物去除率高、出水水质好特点,因此,选择采用曝气调节＋SBR法对废水进行处理。考察了有机废水pH对出水水质的影响,结果表明,有机废水贮存池pH调节至6．2～6．4时,出水COD达450-480mg／L的最佳效果。     

用亲水亲油树脂处理急冷水乳化油废水的研究

用亲水亲油树脂组成的系统对乳化油废水进行处理的研究。经过装置侧线实验研究表明 ,在液空速分别为 1.0、1.5、2 .0和 2 .5时 ,对油的平均去除率分别为 99.1%、99.2 %、78%和 94.6 %;对乳化油水浊度的去除率分别为 98.5 %、98.0 %、97.1%和 92 .5 %;对COD的平均去除率分别为 83.7%、89.1%、5 8.8%和 79.5 %,说明上述亲油树脂均能有效地去除乳化水中的油、浊度和COD。实验还发现 ,该亲水亲油树脂在进行处理时 ,pH对油、浊度和COD的去除率基本不产生影响。     

改性碱式氯化铝处理天然气钻井废水

以改善常用絮凝剂对四川石油局某井场天然气钻井废水中COD的去除效果为目的 ,研究了在碱式氯化铝中引入SO2 -4 改进其絮凝性能的工艺条件。结果表明 ,改性过程中 ,Al3 + SO2 -4 和OH- Al3 +的最佳摩尔比分别是 10～ 15∶1和 (0 .5 0～ 0 .70 )∶1,适宜的改性时间和改性温度分别是 2h和 40℃。改性产品与市售聚合氯化铝相比 ,可在较少的投加量时达到较高的COD去除率     

化工综合污水生物脱氮工艺小试研究

针对兰州化学工业公司污水处理场的污水水质情况,考察了曝气时间对污水氧化性能的影响,研究了ＯＡＯ、ＡＯＯ、ＡＯ和ＡＯＡＯ加膜法等４种生物脱氮工艺。结果表明：只有用ＡＯＡＯ加膜法工艺、才能使ＣＯＤ浓度为５５０ｍｇ／Ｌ、ＮＨ３－Ｎ浓度为５０－８０ｍｇ／Ｌ污水中的ＣＯＤ和ＮＨ３－Ｎ去除率均达８０％以上。     

Reduction of organic matter from municipal wastewater at low cost using green synthesis nano iron extracted from black tea: Artificial intelligence with regression analysis

Nanotechnology especially green synthesis nanoparticles is the modern technology for the adsorption and degradation a wide range of wastewater contaminants. The prepared Green Synthesis nano Zero Valent Iron (GT-nZVI) extracted from soft black tea was characterized using XRD, SEM, and EDAX analysis. This study explores different nonlinear adsorption and kinetic models that can describe the adsorption mechanism of organic matter represented in COD and BOD onto GT-nZVI. The effect of GT-nZVI on COD and BOD removal were studied at different pH, adsorbent dose, contact time, stirring rate, and concentrations. The results indicated that GT-nZVI is effective in the removal of COD and BOD from wastewater, where the removal efficiencies of 87.9 and 100% were achieved for 600 ± 15.0 and 100 ± 11.8 mg/L COD, respectively, and 91.3 and 100% for 365 and 60 mg/L BOD, respectively. Also, GT-nZVI is a highly effective material for wastewater contaminants removal and pass the Egyptian Ministerial Resolution No. 92 of 2013 limits with Operating and Maintenance Cost 0.440 $ USD. The adsorption isotherm data of COD and BOD fitted well to Freundlich and khan, respectively, and Pseudo Second Order kinetic model. Artificial neural network importance data agree with the result of response surface methodology in simulating the adsorption of organic matter onto GT-nZVI indicating the most significant coverable is adsorbent dose. Finally, this study appropriates using GT-nZVI in highly salted municipal wastewater rather than traditionally activated sludge treatment techniques.     

Study on Application of Novel Flocculating Agent in Treating Refinery Wastewater with High Concentration of Pollutants

After conducting a lot of screening experiments the appropriate flocculating formulations for treating high-concentration wastewater discharged from a certain refinery were selected. The oil removal rate and COD removal achieved by these flocculating formulations were better than that achieved by the conventional compound formulation consisting of polyaluminium chloride(PAC) and polyacrylamide(PAA) . Addition of an oil/water separating agent to the formulation could improve its oil removal performance to fa...     

涪陵页岩气钻井污水重复利用研究

涪陵页岩气田属于开发初期,开发井数多,皆为长水平井,其产生的大量钻井污水急需处理,而重复利用于压裂现场是最经济最环保的手段。室内通过分析涪陵页岩气田钻井污水性质、研究目前钻井污水重复利用存在的难题,针对性地研究了处理药剂、处理工艺、处理装备和重复利用方案。从钻井污水处理效果和现场重复利用情况看出,优选的水处理药剂满足现场污水处理要求,处理工艺及处理装备简便易行。处理后水质达到重复利用技术指标,与压裂液配伍性良好,能满足涪陵山区复杂地形重复利用工艺要求。     

酸化-混凝-催化氧化联合处理钻井废液研究

油气田钻井废液一直是油田治理环境风险的难题,本实验以某油田钻井废液为研究对象,其COD值高达67 920mg/L,通过酸化-混凝-催化氧化等联合工艺对其进行处理,重点考察新型混凝剂PAZC的制备及其二氧化氯催化氧化过程的最佳工艺条件,处理后其COD值能降到126.9mg/L,达到GB/T 8978-1996《污水综合排放》的二级排放标准。     

丁辛醇生产废水处理技术研究

丁辛醇装置在生产过程中产生的化学耗氧量(COD)浓度高达40 000 mg/L。利用酸化萃取法处理丁醛缩合高浓度有机废水的思路,探讨了不同废水pH值、温度、萃取剂及萃取剂用量对萃取效果的影响。实验结果表明:以辛醇、辛醇残液和辛烯醛残液作为萃取剂,在废水pH值为1~3、萃取剂与废水的体积比为1∶(1~12)、温度为25~60℃条件下,对丁辛醇废水进行萃取处理,均可得到较好的处理效果,COD去除率可达83%~94%。