两性田菁胶在处理生活污水中的助凝作用

研究了以聚合硫酸铁为主凝剂、两性田菁胶(ASG)为助凝剂处理城市生活废水的各种影响因素.实验结果表明:聚合硫酸铁和两性田菁胶分别以200mg/L和10mg/L的复配浓度、pH值接近7时混凝效果最佳,CODCr去除率达到近80%,处理后废水CODCr达到国家排放标准.     

6-氨基青霉烷酸生产废水的厌氧和深度处理研究

针对6-氨基青霉烷酸生产废水的高污染物浓度、高硫酸根、难降解物质多的特点,对废水经过硫酸根预处理,稀释3倍和6倍后,废水对厌氧污泥没有急毒性,厌氧污泥可以逐步适应废水环境。经过厌氧处理以及后续的Fenton深度处理,高浓度的6-氨基青霉烷酸生产废水CODCr可由45450mg/L降到255mg/L,出水CODCr可达到污水三级排放标准。     

树脂吸附法处理1,4-二羟基蒽醌生产废水的研究

本文研究了树脂吸附法处理1,4-二羟基蒽醌生产废水。结果表明,NDA-404大孔吸附脂对该废水具有良好的吸附-脱附效果。原废水中邻苯二甲酸浓度约为4700-12000mg/L,CODCr约为6800-24000mg/L,经树脂吸附处理后,邻苯二甲酸的吸附率≥99.5%,CODCr去除率≥99.5%,树脂的脱附率为100%。邻苯二甲酸的回收率≥80%,在废水有效处理的同时实现了废物资源化。     

Fenton-UASB-生物接触氧化处理Fischer-Tropsch合成废水的研究

用Fenton-UASB-生物接触氧化组合工艺对Fischer-Tropsch合成废水进行处理。实验结果表明,采用Fenton法对废水进行预处理,在pH值为3,H2O2的投加量为30 mL/L,Fe2+投加量为1.2 g/L,反应时间为120 min时,去除了63%的CODCr,有效地提高了废水的可生化性;Fenton预处理出水经UASB厌氧生物处理后,CODCr去除率达90%以上;最后经接触氧化后,出水CODCr达100 mg/L以下,达到了GB8978-1996《污水综合排放标准》中化工类废水的二级排放标准。     

军用化工企业含氮废水处理工艺研究

采用厌氧——缺氧——SBR微生物生化处理组合工艺,研究了双基（含双基混合酯）球扁药含氮废水处理技术,通过菌种驯化,实现了高盐浓度、高CODCr含量废水经处理后达标排放,CODCr的总去除率达到97．7％,质量浓度降到96mg／L;BOD5总去除率达到了98．O％,质量浓度降到28mg／L;SS的总去除率达到94．4％,质量浓度降到了9mg／L。     

絮凝-漂白粉催化氧化处理印染废水

采用絮凝-漂白粉催化氧化法,筛选出硫酸镁催化剂,提高难生化处理的印染废水对色度、COD的去除效果。实验结果表明,对COD_(Cr) 592 mg/L、色度625倍、pH 9.82、SS 150 mg/L的某印染废水,当废水p H为6时,投加Al_2(SO_4)_3·18H_2O 400 mg/L、聚丙烯酰胺(PAM)2 mg/L,催化剂硫酸镁80 mg/L,有效氯30%的漂白粉1.0 g/L,CODCr最终去除率达到88.2%,色度去除率98.4%,浊度去除率86.6%,出水pH为6,达到国家二级排放标准。催化氧化的脱色速率提高近一倍,结果对印染废水的处理研究和实际应用具有一定价值。     

镀铜铁屑-H_2O_2催化氧化降解含酚废水

采用镀铜铁屑代替传统Fenton体系中的FeSO4作为催化剂,通过改变H2O2与镀铜铁屑的投加量、溶液的pH值、反应温度、反应时间等条件,研究了该体系对处理苯酚废水的影响。结果表明,常温下处理实际含酚印染废水,在pH值为4~6,30%H2O2 12mL/L,镀铜铁屑5g/L,反应时间为45min时,COD去除率可达96%,其CODCr从5827mg/L降至419mg/L,色度从2000降至30,符合国家三级排放标准。     

CTMAB交联累托石吸附苯胺废水的研究

以十六烷基三甲基溴化铵 (CTMAB) 为交联剂与累托石进行交联反应,制备CTMAB交联累托石,吸附处理CODCr值为910.6mg/L和2806.4mg/L的苯胺废水。结果表明,当CTMAB交联累托石用量为40g/LH2O、pH为7.00和1.00、常温吸附60min时,其CODCr去除率达67%以上。吸附符合Freundlich等温吸附式:?1.338Ct1/n,吸附反应为一级反应:tteCC51019.10--=, 吸附热力学研究表明:ΔH=1.819kJ/mol,ΔG=0.051kJ/mol,ΔS=6.073J/mol稫。     

树脂吸附法处理高浓度DSD酸氧化工序生产废水的研究

本文采用大孔吸附树脂固定床工艺处理DSD酸氧化工序生产废水。实验结果表明，ND804大孔吸附树脂对该废水具有良好的吸附－脱附效果，废水经ND804树脂吸附处理后，CODCr由14790mg/L降至1300mg/L左右，COD去除率约为91％，并可回收纯度达80％的DNS酸，废水在得到有效治理的同时实现了废物的资源化。     

阻燃剂废水的处理研究

阻燃剂生产过程中产生大量的工业废水,通过对比处理实验研究表明：电解Fenton法是处理阻燃剂生产中产生的高浓度有机废水（CODCr=17108mg／L）的有效方法,它既利用了电氧化、电气浮作用,又利用了Fenton试剂的强氧化作用和化学絮凝作用。其处理废水的条件实验结果表明：pH：2．0～2．6;电流密度10．8～14．3A/dm^2;H2O2初始浓度27～42mmol／L;FeSO4初始质量浓度660～990mg／L;电解5h。CODCr去除率达98．34％,色度去除率达74．19％。色质联用分析显示废水处理后的降解产物是无毒害的醋酸。     

6-氨基青霉烷酸生产废水厌氧和深度处理实验研究

针对6-氨基青霉烷酸生产废水高污染物浓度,高硫酸根,难降解物质多的特点对废水经过硫酸根预处理,稀释3倍和6倍后,废水对厌氧污泥没有急毒性,厌氧污泥可以逐步适应废水环境。经过厌氧处理以及后续的Fenton深度处理,高浓度的6-氨基青霉烷酸生产废水COD_cr可由45450 mg/L 降到255 mg/L。出水COD_cr可达到污水三级排放标准。     

半导体复合CdS/TiO2催化剂改性及冷冻-光催化组合方法应用的初步研究

采用溶胶-凝胶法制备多孔氧化钛,并耦合CdS,制备多孔耦合CdS/TiO₂催化剂.煅烧温度为700℃,CdS掺杂比例为3%时,催化剂性能较优.以太阳光为光源,考查了溴氨酸初始浓度对其降解效果的影响,并采用冷冻-光催化组合方法对较高浓度的溴氨酸废水的处理进行了初步研究.浓度为500 mg/L的溴氨酸模拟废水(其中氯化钠质量浓度为500 mg/L)经冷冻后,当成冰率为70%时,体系中冰层的Na⁺含量、总有机碳(TOC)和吸光度分别由209.88 mg/L,208.90 mg/L和8.120降至19.06 mg/L,24.80 mg/L和0.638.使用多孔耦合催化剂对该冰层融水光降解,光照6 h,褪色率和TOC去除率分别达到100%和87.04%.     

TREATMENT AND RESOURCE REUSE OF WASTEWATER FROM NAPHTHOL AS-E PRODUCTION PROCESS

1. INTRODUCTION Naphthol As-E is an important intermediate of organic pigment and dyestuff. It is produced by condensation of 2,3-acid (2-hydroxy-3-carboxlic -napthalene) and p-Aminochlorobenzene with wastewater discharged [1]. The detected organic chemicals in the wastewater are primarily composed of 2,3-acid and a little naphthol As-E (Table 1). Both of them are very toxic and resistant to biodegradation. If discharged directly, the valuable materials in the wastewater would be waste…     

Removal of COD,aromaticity and color of a pretreated chemical producing industrial wastewater: a comparison between adsorption,ozonation, and advanced oxidation processes

A wide range of products are produced in the chemical producing industry such as textile dyes, chemicals, printing dyes and chemicals, paper chemicals, electrostatic powder dyes, and optical brighteners. The aim of this study is to investigate the treatability of chemical oxygen demand (COD), aromaticity, and color in the wastewater of this sector, where highly complex chemicals are used. Most of the studies in the literature are related to the treatment of synthetically prepared dyed wastewater. This study is important as it is carried out with real wastewater and gives results of many treatment methods. In the study, COD, UV-vis absorbance, and color values were attempted to be removed from the wastewater of a chemical producing industry that was pretreated by coagulation-flocculation. The COD value of the pretreated wastewater discharged to the central treatment system was restricted as 1000 mg/L. Pretreated wastewater characterization is as follows: COD: 2117 mg/L, UV-vis absorbance values at; 254 nm: 9.91, 280 nm: 8.65, 341 nm: 12.77, 436 nm: 5.01, 525 nm: 2.24, and 620 nm: 1.59. In the study, adsorption, ozonation, and advanced oxidation processes (Fenton and persulfate oxidation) were used to remove COD and UV-vis absorbance values (aromaticity, organics, and color). The method by which the best removal efficiency was obtained for all parameters was the adsorption process using powdered activated carbon (PAC). The equilibrium PAC dose was found as 6 g/L. At this adsorbent dose, the removal efficiencies of UV-vis absorbance values were all around 99% and the efficiency of COD removal was 77%. The Langmuir isotherm constants were found to be q_max= 30.4 mg/g and K_L = 487.9 (L/mg). The COD concentration at this adsorbent dose was 486 mg/L and wastewater was suitable for discharge to the central wastewater treatment plant in that region.     

Photolysis of organic pollutants in wastewater with 206 nm UV irradiation

A new-type UV light source(206 nm) was explored for the degradation of organic pollutants in wastewater for the first time.The degradation performances of triphenyltin chloride(TPTCl),dimethyl phthalate(DMP),as well as rhodamine B(RhB) were investigated.The results indicated that removal efficiency of 50 mg/L RhB,60 mg/L DMP and 120 mg/L TPTCl can reach 88.6%, 92.5%and 89.4%for 60 min,50 min and 75 min,respectively.By comparison of removal efficiency,we found 206 nm is superior to 253.7 nm UV in wastewat...     

应用大孔吸附树脂从农药废水中回收毕克草

毕克草为一种新型除草剂,通常情况下很难被降解,本文利用物理吸附原理通过自行制备的大孔吸附树脂从农药水中对其进行了回收,回收效果良好,同时也达到了废水处理的目的。优化的最佳实验条件:室温下,pH=1.0以及流速为5BV/h时,对COD为15000mg/L的毕克草废水吸附处理后,其出水可达《污水综合排放标准》(GB89—1996)中的一级排放标准;洗脱再生时,室温下,用95%的乙醇洗脱,流速为2BV/h,(即2倍树脂床体积/h)回收率可达98.4%,纯度达93.7%,总流程一次可处理该废水240mL。     

树脂吸附法处理3,6-二氯水杨酸生产废水

研究了树脂吸附法处理3,6-二氯水杨酸生产废水的工艺过程。结果表明,NDA-77吸附树脂对该废水具有良好的吸附-脱附效果。经树脂吸附处理,废水中主要有机污染物2,5-二氯苯酚和3,6-二氯水杨酸均得到去除,总有机碳(TOC)由210mg/L降为20mg/L以下,吸附饱和的树脂可采用稀碱液实现完全再生。经吸附处理去除有机物后,废水中含有20%的KCl,可进入工厂现有的KCl隔膜电解装置,用于KOH的生产。     

TREATMENT AND RESOURCE REUSE OF WASTEWATER FROM NAPHTHOL AS—E PRODUCTION PROCESS

The wastewalter from naphthol As-E production process was treated with macroporous polymeric adsorbent DNDA-222,Naphthol As-E and 2,3-acid in the wastewater could be removed completely and the Total Organic Carbon(TOC) of the wastewater was decreased more than 98% from 1655mg/L to less than 30mg/L.The adsorbates could be desorbed completely with NaOH aqueous solution.     

混凝沉淀法处理工业含氟废水的工艺研究

以半导体工业中的含氟废水为研究对象,采用混凝沉淀法对去除废水中氟离子进行了系统的工艺研究.以Ca(OH)2为沉淀剂,分别用聚合氯化铁(PFC)和聚合氯化铝(PAC)为混凝剂,并加入聚丙烯酰胺(PAM)助凝剂的方法,对药剂投加量、混凝剂种类、体系pH值、沉降时间等因素进行了实验探索.结果显示,PFC比PAC混凝效果好.当Ca(OH)2添加量为理论值的2.5倍,PFC用量为15mg/L,助凝剂PAM用量为4mg/L,体系的pH值在6～7时,其除氟效果最佳,此时废水中残留氟离子浓度可降低至5.5mg/L,远远低于国家规定的排放标准(10mg/L).     

树脂吸附法处理邻硝基苯酚废水的研究

本文采用自制的大孔吸附树脂ＮＤＡ－１１７,吸附处理邻硝基苯甲醚生产过程中产生的高浓度邻硝基苯酚废水,原废水邻硝基苯含量７４００－１１００００ｍｇ／Ｌ,经中和沉淀－树脂吸附法处理,处理量２０ＢＶ。吸附流出液邻硝基苯酚含量６０－８０ｍｇ／Ｌ,邻硝基苯酚去除率≥９９％,树脂经碱液脱附可重复使用,并回收高纯度邻硝基苯酚,且运行稳定,该处理工艺投资少,操作简便,可望实现工业化。