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991.
992.
选用适合热电厂特点的水处理剂,利用静态试验。动态模拟试验手段,对城市生活污水回用于热电厂循环冷却水系统中的复配药剂的阻垢缓蚀性能进行了研究。通过试验表明。污水回用是可行的,为城市生活污水回用于热电厂循环冷却水系统工程提供了可靠的参数。 相似文献
993.
添加粉煤灰对污泥比阻影响的研究 总被引:1,自引:0,他引:1
污泥脱水是污泥处理中重要的一环。本研究采用电厂废弃物粉煤灰对未脱水污泥改性,经过改性的污泥比阻降低,改善污泥脱水性能,并对产生这一现象的机制进行了探讨。 相似文献
994.
介绍了前处理-水解-生物接触氧化工艺处理染料废水的工程实例.当进水COD≤8000 mg/L时,出水可达到国家〈污水综合排放标准〉(GB8978-1996)二级标准. 相似文献
995.
以天津市医疗废物管理现状为研究对象,对处置方式进行深入探讨,分析目前分散处置和集中处置存在的缺陷,提出“区域集中处置”设想;并运用模糊决策模型理论,建立较完善的处置方式评价指标体系,应用模糊综合评价模型得出“区域集中处置”是最佳的医疗废物处置方式,同时提出了相应的区域集中处置策略。 相似文献
996.
MnO2负载树脂的制备及对As(V)的去除效果 总被引:1,自引:0,他引:1
制备了大孔和DH302 2种MnO2的负载树脂。并用SEM、EDS手段表征了负载树脂,实验了负载MnO2后树脂对As(V)的去除效果。结果表明:负载树脂对As(V)的去除效果比原树脂有很大提高;吸附As(V)后的2种负载树脂,均能较好地解吸并可重新用于对As(V)的吸附实验。 相似文献
997.
998.
我们于1995年3月 ̄4月调查了武汉市高位铁皮水箱的供水质量。结果表明:高层住宅水箱近年虽曾清洗消毒,但高层用户龙头水及水箱水中游离性全氯未达标比例较大,分别为73.3%和66.7%。个别底层住户水样中铁超标。高位水箱水样中细菌总数超标比例为20%。反映了高层住宅二次供水中在水的输送、贮存过程中有二次污染存在。经水样监测指标相关性和灰色关联性分析,认为游离性余氯可作为常规监测高层住宅二次供水质量的 相似文献
999.
Saiyasitpanich P Lu M Keener TC Liang F Khang SJ 《Journal of the Air & Waste Management Association (1995)》2005,55(7):993-998
The effect of sulfur content on diesel particulate matter (DPM) emissions was studied using a diesel generator (Generac Model SD080, rated at 80 kW) as the emission source to simulate nonroad diesel emissions. A load simulator was used to apply loads to the generator at 0, 25, 50, and 75 kW, respectively. Three diesel fuels containing 500, 2100, and 3700 ppm sulfur by weight were selected as generator fuels. The U.S. Environmental Protection Agency sampling Method 5 "Determination of Particulate Matter Emissions from Stationary Sources" together with Method 1A "Sample and Velocity Traverses for Stationary Sources with Small Stacks or Ducts" was adopted as a reference method for measurement of the exhaust gas flow rate and DPM mass concentration. The effects of various parameters on DPM concentration have been studied, such as fuel sulfur contents, engine loads, and fuel usage rates. The increase of average DPM concentrations from 3.9 mg/Nm3 (n cubic meter) at 0 kW to 36.8 mg/Nm3 at 75 kW is strongly correlated with the increase of applied loads and sulfur content in the diesel fuel, whereas the fuel consumption rates are only a function of applied loads. An empirical correlation for estimating DPM concentration is obtained when fuel sulfur content and engine loads are known for these types of generators: Y = Zm(alphaX + beta), where Y is the DPM concentration, mg/m3, Z is the fuel sulfur content, ppm(w) (limited to 500-3700 ppm(w)), X is the applied load, kW, m is the constant, 0.407, alpha and beta are the numerical coefficients, 0.0118 +/- 0.0028 (95% confidence interval) and 0.4535 +/- 0.1288 (95% confidence interval), respectively. 相似文献
1000.
The effect of methanol of low concentration on adsorption and leaching of atrazine and tebuconazole was studied in this paper. The adsorption coefficients and the retardation factors (Rm) of pesticides on EUROSOIL 3# log-linearly decreased as volumetric fraction of methanol (fc) was increased in the binary solvent mixtures of methanol and water. These data are consistent with solvophobic theory formerly outlined for describing the adsorption and transport of hydrophobic organic chemicals from mixed solvents. Nevertheless, the adsorption of these pesticides in soil–water system slightly increased when the soil was pre-washed with methanol in comparison with that pre-washed with water (pure water system). Furthermore, their adsorption coefficients were still higher in binary solvent systems with methanol of very low concentrations, i.e. fc<0.03 for atrazine and fc<0.01 for tebuconazole, than those in pure water system. The adsorption coefficients (logKw) of atrazine and tebuconazole predicted by solvophobic theory were 0.5792 and 1.6525, respectively, and their experimental logKw were 0.3701 and 1.6275 in pure water system. Obviously, the predicted logKw of the two pesticides was higher than the experimental log Kw in pure water system. The predicted Kw and the retardation factor (Rw) in pure water system by solvophobic theory are thus possibly inaccurate. 相似文献