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 共查询到11条相似文献，搜索用时 468 毫秒
1.
江汉油田废弃油基钻井液处理   总被引：1，自引：0，他引：1  
根据江汉油田废弃油基钻井液特点,采用化学破乳法处理该废弃油基钻井液,在废弃油基钻井液中加入破乳剂、絮凝剂和混凝剂.结果表明:油回收率达到94.2%,芬顿氧化处理后的废水达到《污水综合排放标准》(GB 8978—1996)二级标准,COD去除率达到97.35%,色度去除率达到95.83%;经过固化剂固化96h后,泥渣固化物紧密度达到Ⅳ级,固化物浸出液达到《污水综合排放标准》(GB 8978—1996)二级标准,能够实现江汉油田废弃油基钻井液无害化处理.  相似文献   

2.
【目的】探讨白骨壤人工湿地处理模拟对虾养殖废水的效果。【方法】通过室内构建白骨壤垂直流人工湿地和无植被人工湿地系统,研究处理时间和水力负荷对人工湿地处理模拟对虾养殖废水的影响,并分析人工湿地内部生物膜的细菌群落结构。【结果】人工湿地启动60d后的稳定运行阶段,白骨壤人工湿地总氮和氨氮的去除率分别在77.19%～84.66%,91.62%～98.48%,无植被人工湿地总氮和氨氮去除率分别在41.40%～61.69%,47.08%～79.79%,白骨壤人工湿地对总氮和氨氮去除率显著高于无植被人工湿地(P <0.05);在总磷、有机物和总有机碳去除率方面,两者无显著差异。白骨壤人工湿地处理养殖废水3d后总氮、氨氮、总磷、有机物和总有机碳去除率分别为84.7%、94.1%、92.0%、64.1%和66.2%,出水浓度均低于海水养殖废水排放标准(GB3097-1997)。白骨壤人工湿地生物膜中变形杆菌门(Proteobacteria)、硝化螺旋菌门(Nitrospinae)丰度显著高于无植被人工湿地(P <0.05);无植被人工湿地蓝细菌占细菌总量的5.36%。水力负荷对总氮、氨氮和总磷的去除率影响显著(P<0.05);当水力负荷0.06m^3/(m^2·d-1)时,总氮、氨氮和总磷的去除率均达到最大值,分别为66.6%、75.0%和41.8%;日去污量均值为51.6、73.5和10.4 mg/d。有机物和总有机碳在不同水力负荷下去除率变化不显著(P> 0.05)。【结论】白骨壤构建海水人工湿地是循环海水养殖废水生物处理的一种有效途径。  相似文献   

3.
Printing and dyeing industry is a considerable source of environmental contamination. In this study treatment of printing and dyeing wastewater with a new type of sewage treatment agent, fly-ash coated with chitosan particles (FCCP), was examined. The effects of pH, stirring time, sedimentation time and temperature on color, COD, turbidity and NH3-N removal were determined. The optimum dosage of FCCP and the influence of individual factors on removal efficiency were tested. The optimum parameters determined using the L16(45) orthogonal experiment were as follows: FCCP (weight ratio of chitosan to fly-ash 1:6) dosage, 4 g·L−1; temperature, 35°C; pH, 4. The stirring time and sedimentation time were 20 min and 5 h, respectively. Under these optimum conditions, the color, COD and NH3-N removal ratios were 97%, 80% and 75%, respectively.  相似文献   

4.
A three-dimensional advection-diffusion model coupled with the degradation process is established for describing the transport of chemical oxygen demand (COD). Comparison of the simulated distribution of COD at the surface in the Bohai Sea in August, 2001 with field observations, shows that the model simulates the dataset reasonably well. The Laizhou Bay, Bohai Bay, and Liaodong Bay were contaminated heavily near shore. Based on the optimal discharge flux method, the Environmental Capacity (EC) and allocate...  相似文献   

5.
用铁屑微电池原理深度处理了医院废水 ,分析了废水pH、铁屑用量、反应时间对处理效果的影响。结果表明 ,最佳的反应条件为 :废水进水pH为 3.5 ,铁屑用量为 12 .5 % ,常温反应 80min。  相似文献   

6.
The wide application of antibiotics in aquaculture requires an efficient treatment of the wastewater before discharging it into the environment. During the wastewater treatment, the influence of antibiotics on the performance of bioreactor should be well revealed due to their toxicity to the functional microbial community. In this study, the effect of feeding 10-30 mg L~(-1) sulfamethoxazole(SMX) in influent on the performance of an anoxic/oxic-moving bed biofilm reactor(A/O-MBBR) treating mariculture wastewater and the responding change of biofilm microbial communities was investigated. The COD average removal rate remained at 94.61%-97.34% with the dosage of SMX. Compared with that, the nitrifying removals of NH_4~+-N and NO_2~--N were violently inhibited by 30 mg L~(-1) SMX and denitrifying removal of the NO_3~--N decreased obviously with 20 mg L~(-1) or more SMX. The microbial community in the successful startup bioreactor was relatively abundant, while the diversity of microbial community decreased with the increase of feeding SMX. The salt-tolerant and SMX-resistant genera Arcobacter, Thiothrix, Desulfuromusa and Nitrosomonas were gradually enriched and finally played a vital role in converting COD and recycling nitrogen and sulfur. Hence, the present A/O-MBBR reactor with the salt-tolerant functional microbiota achieved efficient removal of pollutants in the presence of low concentration(e.g., 10 mg L~(-1)) SMX.  相似文献   

7.
Based on the ArcGIS geographic information system and the ORACLE database management system,this paper reports our studies on the technology of Marine Engineering Geological Exploration Information System(MEGEIS). By analyzing system structure,designing function modules and discussing data management,this paper systematically proposes a framework of technol-ogy to integrate,manage,and analyze the seabed information comprehensively. Then,the technology is applied to the design and development of the Bohai Sea Oilfield Paradigm Area Information System. The system can not only meet the practical demands of marine resources exploration and exploitation in the Bohai Sea oilfield,but also serve as a preparatory work in theory and technology for the realization of the 'Digital Seabed'.  相似文献   

8.
以Cu2O粒子为光催化剂，太阳光为光源，研究了Cu2O粒子对可溶性染料罗丹明B的光催化降解情况。并考察了不同光源，光照时间，催化剂用量，双氧水加入量和溶液的酸度等对罗丹明B光催化降解过程的影响。结果表明，Cu2O粒子在太阳光照射下，能较好地降解罗丹明B，其最佳反应条件为：罗丹明B浓度为5mg／L，催化剂（Cu2O）为0．75g／L，pH值为5．2，H2O2加入量1．0％，反应时间25min。此条件下，罗丹明B的降解率达到100％，即与在500W高压汞灯紫外（λ=365nm）光照有相同的降解效果。  相似文献   

9.
Based on the decomposition model of environmental quality and univariate regression model, the relationships of industrial wastewater drainage with economic scale, economic structure, and technological level in Anshan, a mining city in Northeast China, were studied. The results showed that, due to scale effect, the drainage of three important industrial wastewater pollutants (COD, NH3-N and petroleum) increased 8505t, 671t and 384t, respectively, and due to structure effect, those pollutants drainage increased 3996t, 174t and 120t from 2001 to 2006. While due to technological effect, the drainage of COD, NH3-N and petroleum reduced 4452t, 458t and 331t, and due to cross effect, those pollutants drainage reduced 7270t, 575t and 476t simultaneously. Meantime, the relationships between household consumption structure and domestic sewage discharge were analyzed, and domestic sewage discharges in different income levels were also compared. The results showed that, the domestic sewage discharges would increase 376t with 1000 yuan (RMB) increased in the traffic and communication consumption, and they would be 344t, 219t, 428t, 1873t, respectively, in housing consumption, food consumption, medical consumption, miscellaneous commodity consumption. The proportion of domestic sewage discharge increased for high income residents significantly, but reduced for lower income residents. The industrial wastewater pollutants drainage tends to be reduced by technical progress, while domestic sewage discharge will be a more important factor for urban water environment quality.  相似文献   

10.
In order to explore the effect of carbon and nitrogen (C/N) ratio on the performance of anoxic/aerobic-moving bed biofilm reactor (A/O-MBBR) process for treating mariculture wastewater,a laboratory-scale A/O-MBBR was conducted.The results showed that the reduction of C/N ratio was conducive to improving the removal efficiency of chemical oxygen demand (COD) and ammonia nitrogen (NH_4~+-N),while inhibiting that of nitrite nitrogen (NO_2~--N) and nitrate nitrogen (NO_3~--N).The extracellular polymeric substances (EPS) in anoxic zone were significantly higher in concentration than that in aerobic zone although they both declined with decrease of C/N ratio.The result provides solid support for better controlling the pollution of mariculture wastewater.  相似文献   

11.
1IntroductionDuringthe past several years,concern hasincreasedover the potential pollution of watershed by estrogeniccompounds,including steroidal hormones fromhumanand ani mal sources.Effluents from wastewater treat-ment plants are sources of endocrine-d…  相似文献   

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