共查询到20条相似文献,搜索用时 78 毫秒
1.
2.
3.
4.
5.
采用高效液相色谱法建立马来酸氨氯地平的测定方法.色谱柱:Kromasil C18不锈钢柱,流动相:甲醇-0.03mol·L<'-1>磷酸二氢钾溶液(62:38,V/V),检测波长237 nm.采用紫外分光光度法,在236nm的波长处测定吸收度.在优化的色谱条件下,该方法的线性范围为4~40mg·L<'-1>(r=099... 相似文献
6.
在pH4.4~5.0的HAc-NaAc介质中,盐酸普罗帕酮(PPF)能与赤藓红(Ery)阴离子形成离子缔合物,引起荧光猝灭.赤藓红(Ery)体系用荧光猝灭法测定盐酸普罗帕酮的检出限分别为:0.045 μg·mL<'-1>而线性范围分别为:0.5~3.5 μg·mL<'-1>.本实验重点研究了荧光猝灭法的适宜反应条件. 相似文献
7.
8.
以200 mL含Cr(Ⅵ)300mg·L<'-1>模拟废水作为试验液,采取单因素试验法研究用201×7阴离子交换树脂处理含铬废水,研究了在交换过程中不同的废水pH值、处理时间、树脂用量和废水的流量对处理效果的影响.得出静态交换的最佳工艺条件是:pH值为3~3.5,交换时间为3 h,树脂用量为2.5 g,固定废液初始浓度... 相似文献
9.
《化工学报》2016,(10)
采用新型强化生物除磷工艺——污泥转移SBR处理合成废水,探讨胞外聚合物(EPS)在工艺强化除磷过程中的作用。当污泥转移量为0、15%及30%时,污泥中的EPS含量分别为(108.14±9.68)mg·(g MLSS)?1、(128.17±1.45)mg·(g MLSS)?1和(123.35±22.98)mg·(g MLSS)?1;工艺的除磷率分别为82.14%±0.85%、96.35%±1.25%及98.99%±0.98%,反应末端EPS中TP含量占污泥中TP的比重分别为27.9%±2.55%、57.23%±2.33%和63.88%±2.87%。此外,污泥中EPS在该工艺的好氧吸磷过程中吸磷量分别为(2.04±0.32)mg·(g MLSS)?1、(5.90±0.38)mg·(g MLSS)?1和(6.00±0.52)mg·(g MLSS)?1,在污泥吸磷量中的贡献率均达到90%以上。研究结果表明:污泥转移SBR工艺中随着污泥转移量的增大有利于提高EPS中的磷含量,从而提升了工艺的除磷性能,EPS在该工艺的吸磷过程中起主要作用。但污泥转移对污泥中EPS含量影响不显著。 相似文献
10.
11.
12.
Comparing different methods of analysing sewage sludge, dewatered sewage sludge and sewage sludge ash 总被引:2,自引:0,他引:2
The following article compares different ways of characterising sewage sludge. Against the background of sludge recycling in agriculture as well as treatment with subsequent phosphorus recovery in mind, the article starts by collating and evaluating the levels of phosphorus, heavy metals, chlorine and sulphur in sludge as reported in the literature. Sewage sludge from the sewage treatment plant at Kaditz in Dresden was analysed using standardised and adjusted methods, which produced different results. In the course of this analysis the results were produced by using elemental analysis, atomic absorption spectroscopy, X-ray fluorescence spectroscopy (X-RFA) and ion chromatography (IC). The second part of the article therefore seeks reasons for the differences in the findings and tries to give solution statements. The article closes by calculating transfer coefficients for selected parameters during the incineration process and solid-liquid separation and weighing up the analysis techniques compared. Basically this article will show significant differences in sludge composition and the effects on the specific elements by ashing or mechanical dewatering of the different sludges. An essential attention obtains the analysis by using the X-RFA. 相似文献
13.
研究了污泥停留时间对剩余污泥产量的影响。结果表明:污泥停留时间由7d增至14d时剩余污泥产量下降36.13%,而污泥停留时间由7d增至21d时剩余污泥产量下降78.04%。污泥停留时间的延长对COD cr的去除能力没有明显的影响,但使出水NH3-N浓度和TP浓度均升高,通过调整碳氮磷源的比例可以消除这种负面影响,SRT为14d的工艺BOD5∶N∶P的最佳比例为100∶4.4∶0.96,SRT为21d的工艺BOD5∶N∶P的最佳比例为100∶4.0∶0.9,SRT的延长使污泥沉降性能稍变差。 相似文献
14.
15.
16.
研究了好氧颗粒污泥SBR工艺(序列间歇式活性污泥法)和活性污泥SBR工艺处理高质量浓度氨氮废水的差异,研究表明絮状污泥在驯化适应期内的去除能力增长较快.比较平稳运行情况下的脱氮能力,颗粒与絮状的脱氮效果相比优势不大,因此,还需要对好氧颗粒污泥的其他影响条件做更充分的考察,以利于好氧颗粒工艺的工业化推广. 相似文献
17.
为解决污泥与煤掺混制浆时存在配入量少、污泥水煤浆浓度过低、添加剂用量大、成本高等问题,在实验室开发了污泥复合改性剂与高效改性机相结合的新型污泥改性制备高浓度污泥水煤浆的工艺,并进行了中试制浆试验。结果表明,采用复合改性剂与高效改性机对污泥进行改性,得到的改性污泥黏度比单纯用改性剂得到的改性污泥黏度降低30%以上,这种改性方法完全可以替代流体激波工艺处理污泥。污泥添加量为15%时,污泥水煤浆浓度比不添加改性污泥的普通水煤浆低3%左右,而采用同样污泥改性工艺和优化粒度级配,污泥水煤浆的浓度与普通水煤浆浓度相当,说明采用污泥改性和优化粒度级配可以解决污泥水煤浆浓度低的问题。中试生产线制浆试验结果验证了小试结果和中试装置的可靠性。 相似文献
18.
Fen‐Xia Ye Rui‐Fen Zhu Ying Li 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》2008,83(1):109-114
The activated sludge process is a core technology in wastewater treatment plants. Excess sludge produced in the process must be treated and disposed of properly and may account for up to 60% of total plant operating cost. Therefore, it is necessary to develop new biological concepts to minimize excess sludge production. The oxic‐settling‐anoxic process (OSA process), a modified activated sludge process, may produce less excess sludge than the conventional activated sludge process. The effect of sludge retention time in the sludge holding tank of the OSA process on excess sludge yield has been studied. Four pilot‐scale activated sludge systems were employed, one of which was a conventional activated sludge process, and was used as the control system. The other three were OSA systems operated with different sludge retention times (5.5 h, 7.6 h, and 11.5 h) in the sludge holding tank. All systems were operated with synthetic wastewater for 7 months. Results showed that the three OSA processes with 5.5 h, 7.6 h, and 11.5 h sludge retention time reduced the excess sludge by 33%, 23% and 14%, respectively. Compared to the control process, chemical oxygen demand (COD) removal efficiency and effluent NH3–N concentration were not significantly influenced, but total nitrogen (TN) removal efficiency decreased by 0–9%. Total phosphorus (TP) removal efficiency of OSA processes with 7.6 h and 11.5 h sludge retention time increased by 19%. Sludge settleability was excellent in the three OSA processes. No distinct shift in the diversity of the predominant species was found in microbial populations. We conclude that the OSA system could reduce excess sludge production. Results suggest 6–7 h sludge retention time would be optimal. Copyright © 2007 Society of Chemical Industry 相似文献
19.
为研究耐盐污泥膨胀发生的原因、过程以及控制方法,利用革新MUCT工艺重点考察了10 mg.L-1盐度长期驯化的耐盐污泥在低溶解氧条件下发生污泥膨胀的过程。通过不同方式进行控制,同时比较膨胀前后系统对有机物和氮磷的去除能力,结合污泥微膨胀节能理论提出利用污泥微膨胀提高含盐污水生物处理效率的方法。结果表明:耐盐污泥在长期低溶解氧条件下会发生膨胀;盐度降低导致污泥膨胀加剧;提高盐度可有效抑制其膨胀;当好氧2段溶解氧(DO2)维持在1.0 mg.L-1,好氧1段溶解氧(DO1)维持在2.0 mg.L-1时,污泥容积指数(SVI)维持在190~210 ml.g-1之间,稳定处于微膨胀状态。微膨胀状态下系统出水浊度大大降低,可以利用低氧微膨胀状态提高含盐污水处理效率。 相似文献
20.
采用在序批式反应器中培养50 d的好氧颗粒污泥与同期反应器排出的絮体污泥,在高有机负荷下曝气4 h,颗粒污泥和絮体污泥MLSS较初始时分别增加了67.8%和58.5%,单位体积混合液中颗粒污泥和絮体污泥的个数分别增加了15.4%和4.8%。颗粒污泥和絮体污泥的粒径分布在4 h试验过程中处于动态稳定状态,基本保持不变。曝气4 h后颗粒污泥和絮体污泥平均粒重分别增加45.4%和51.4%,可以看出在对有机底物的竞争中,与絮体污泥相比较,颗粒污泥由于具有较高的活性而占有优势,颗粒污泥的增长速率大于絮体污泥,絮体污泥和颗粒污泥的密度均有明显增长,但颗粒污泥平均粒重增加比例小于絮体污泥。 相似文献