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1.
根据某河水微污染的水质特点,本研究采用粉末活性炭与硅藻土复配,对其进行强化混凝处理。结果表明,粉末活性炭与硅藻土复配比、投加点及不同絮凝剂都对试验中UV_(254)、氨氮、和COD_(Mn)有较大影响,粉末活性炭与硅藻土复合强化混凝工艺对浊度去除的影响不大。本试验可为混凝工艺的优化选择提供参考。  相似文献   

2.
文章以昆山陆浦江为例,介绍了人工潜流湿地对陆浦江水质的净化作用,分析了湿地运行后对各类污染物的去除效果。通过对湿地进出水水质及主要超标因子的总体去除效果进行分析评价,得出结果:人工湿地去除污染物的效果基本达到了预期目标,工艺运行稳定,水质得到改善,为相关地区通过人工湿地净化河水水质提供了宝贵的经验。  相似文献   

3.
微污染饮用水源水中的藻类对供水水质和饮用水安全影响较大。大量存在的藻细胞,不仅会产生异味,还会向水体中释放藻毒素,采用常规水处理工艺除藻效能较差。重点介绍了臭氧预氧化、臭氧强化混凝以及臭氧-粉末活性炭联用工艺对微囊藻毒素的去除工艺,这种臭氧及其联用工艺对保证饮用水水质的安全性具有重要意义。  相似文献   

4.
根据废塑料初加工生产废水水质特点,某废塑料加工工业园区采用隔渣+沉淀+气浮+水解酸化+A/O+深床滤池的主体工艺对其进行处理。该工艺运行一段时间,结果表明,其处理效果稳定,出水水质中SS指标达到污水综合排放一级A标准。笔者介绍了SS去除工艺的设计方法,分析了其运行情况。  相似文献   

5.
人工湿地是一种治理污染河水的生态方法,利用其内部水体、基质、微生物和植物的复杂作用,去除河水污染物。本文首先对人工湿地净化技术进行简单介绍,分析其目前研究成果,然后探讨几种不同运行方式的人工湿地对污染河水的净化效果,并对其净化特性进行具体分析。  相似文献   

6.
介绍了采用气浮--水解酸化——氧化沟工艺处理印染废水的工程应用,总结并分析了工程设计、调试及运行的经验。运行结果表明,处理效果稳定,出水水质达标。  相似文献   

7.
BAF工艺预处理微污染水源水的研究   总被引:1,自引:0,他引:1  
采用BAF工艺对微污染水源水进行了预处理研究,通过中试试验,考察了BAF工艺对微污染水源水的处理效果和轻质陶粒在微污染水体的特性。  相似文献   

8.
喷水织机运行期间需要消耗较多水资源,其废水产生量大,有机物浓度高。本项目采用“气浮+接触氧化+超滤”工艺对喷水织机废水进行深度处理,然后进行回用。排放水水质达到《纺织染整工业水污染物排放标准》(GB 4287—2012)的纳管标准,回用水水质达到《纺织染整工业回用水水质》(FZ/T01107—2011)的标准,满足企业用水要求。该工艺运行稳定高效,易于管理,维护成本低,对同行业废水处理具有指导意义。  相似文献   

9.
根据我国农村微污染水源水的水质情况和农村饮水工程中存在的问题.并结合考虑农村的实际情况.提出了涡旋混凝低脉动沉淀给水一曝气生物滤池一臭氧活性炭联用组合工艺来处理我国的农村微污染水源水。  相似文献   

10.
华北地区某净水厂采用水库水作为水源,水源水质总体满足《地表水环境质量标准》(GB 3838—2002)Ⅲ类水质要求,存在冬季低温低浊、夏季高藻、有机物含量小幅波动、嗅味比较明显等污染特征.本文针对性地分析了各目标污染物的去除技术方案,将各技术工艺进行组合,最终确定其处理技术工艺路线.  相似文献   

11.
The bio-control potential of rhizospere bacteria Pseudomonas fluorescens against plant-parasite nematode had been demonstrated. P. fluorescens had shown the effect to enhance tobacco resistance to root-knot nematode Meloidogyne incognita. Inoculation with P. fluoreseens in tobacco could lead to significant reductions in the number of juveniles that penetrated tobacco root and further life stage development of the juveniles. The number of juveniles penetrated into tobac- co root in treatment with P. fluorescens is significantly different from CK at 2DAI, 6DAI, 8DAI and 10DAI. Significant reduction and delayed development of juveniles that penetrated into tobacco root and treated were observed in treatment at 14DAI, 21DAI, 28DAI and 35DAI. In addition, P. fluoreseens treatment leads to a significant reduction in the number of eggs per egg-mass at 35 DAI. The results show P. fluorescens induced a continuously suppression on root-knot nema- tode M. incognita throughout their entire early infection phase of root penetration, subsequent life stage development and reproduction.  相似文献   

12.
This paper quantifies the local impacts of mechanized logging on forest-dependent communities in Indonesia, before and after decentralization. A conceptual framework incorporates financial, social, enforcement, rent-seeking, and environmental impacts. Using data from 60 communities in East Kalimantan, the empirical results suggest that significantly more households received financial and in-kind benefits after decentralization compared to before. Many communities engaged in self-enforcement activities against firms both before and after decentralization. Post-decentralization, a significantly higher proportion of households perceived community forest ownership. There were few significant differences in perceived environmental impacts. Little evidence exists of a post-decentralization trade-off between environmental and financial contractual provisions.  相似文献   

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14.
商业银行的特殊性体现在风险性、外部性和多重治理目标上,尤其集中体现在风险管理的本质上。风险管理日益成为现代商业银行的主体活动和核心职能,资本管理成为现代商业银行风险管理的核心。在整合EVA和RAROC指标的基础上。文章构建了以资本管理为核心的银行治理的综合评价指标,以求真实反映银行经营的成果,有效衡量风险收益和风险成本的对比关系,从而反映以资本管理为核心的银行风险管理的过程、能力和效率。  相似文献   

15.
Zusammenfassung Die vorliegende Studie analysiert für 87 Neuprodukteinführungen (NPE) und Auslandsmarkteintritte (AME) von Telekommunikations(TK)-Diensteanbietern in Deutschland, zu denen 42 Schlüsselinformanten in einer schriftlichen Befragung Auskunft gaben, (1) inwieweit deren zeitliche Eintrittspositionierung durch Marktcharakteristika und Unternehmensressourcen erkl?rbar ist sowie (2) inwieweit und gegebenenfalls unter welchen unternehmensexternen und -internen Situationsbedingungen deren Markteintrittstiming mit dem wahrgenommenen Eintrittserfolg assoziiert ist. Ein früher Markteintritt wurde dann realisiert, wenn die Wettbewerbsintensit?t im adressierten Gesch?ft niedrig und das Budget für den Expansionsschritt überdurchschnittlich ausfielen. Zwischen dem Markteintrittstiming und der Beurteilung des Eintrittserfolgs bestand ein nicht monotoner, umgekehrt U-f?rmiger Zusammenhang: Frühe Folger wiesen signifikant bessere Erfolgswerte auf als Pioniere und sp?te Folger, deren Erfolgsniveaus nicht signifikant divergierten. In einer Industrie, die durch starke externe Netzeffekte gepr?gt ist, fallen offenbar die Nachteile eines Markteintritts als Pionier oder sp?ter Folger st?rker ins Gewicht als die Vorteile dieser beiden zeitlichen Eintrittspositionierungen. Unabh?ngig vom Markteintrittstiming wurden NPE/AME von TK-Unternehmen als erfolgreicher eingestuft, wenn sie sich in einen Markt mit stark wachsender Nachfrage und aufeinander abgestimmt (re)agierenden Wettbewerbern mit qualitativ überdurchschnittlichen, abw?rtskompatiblen, erprobbaren und wenig erkl?rungsbedürftigen TK-Diensten engagierten.   相似文献   

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18.
利用膜技术回收利用碱性废水研究进展   总被引:1,自引:0,他引:1  
回顾了利用膜分离技术处理碱性废水的工艺与综合利用技术所取得的丰硕成果,总结了各种治理方法的特点、适用性及发展方向。  相似文献   

19.
Indonesia’s economic growth picked up slightly in mid-2016 but remains below the level demanded by government and popular aspirations. Despite a plethora of reforms intended to increase efficiency and productivity, some policies are perverse and longstanding problems of implementation remain. The share of manufacturing has declined, the real exchange rate has appreciated, exports have dwindled, and growth has been trending downwards. The banking sector is stable but inefficient, with wide net interest margins and numerous barriers to competition. Trade protection, particularly in basic food commodities, has created high costs that weigh particularly heavily on the poor. Declining government revenues have placed increasing pressure on the public budget, even as the current administration aims to increase spending on infrastructure and welfare and to enhance productivity. In an effort to increase revenues, the government has announced a tax amnesty program and other measures. In addition, Sri Mulyani Indrawati, the new finance minister, has taken steps to cut non-essential expenditure in order to secure high spending on infrastructure and at the same time keep within the 3% budget deficit limit stipulated by law. Although the overall debt situation is not yet alarming, declining revenues and budget cuts that do not fully reflect this decline are putting pressure on increasing debt levels. The government’s high-profile tax amnesty program was the major policy initiative implemented in the second half of 2016 that aimed to relieve this pressure. Despite widespread criticism of, and scepticism about, the tax amnesty (both within and outside Indonesia), its first phase had a much higher participation rate than most independent accounts expected. Revenues raised so far through the amnesty are less than 60% of the official target, but this is actually a strong result for the short term. The bigger question, however, is whether the amnesty is a key element of a more encompassing strategy to overhaul the system of taxation and tax administration.  相似文献   

20.
In this paper, I analyze the causes of the prolonged slowdown of the Japanese economy in the 1990s and find that the stagnation of investment, especially private fixed investment, was the primary culprit. I then investigate the causes of the stagnation of household consumption during the 1990s and find that the stagnation of household disposable income, the decline in household wealth, and increased uncertainty about the future are among the contributing factors. Finally, I consider whether demand side factors or supply side factors were more important as causes of the prolonged slowdown of the Japanese economy in the 1990s and conclude that the former (especially misguided government policies) were probably more important.  相似文献   

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