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411.
UASB+A/O+UF+NF工艺处理生活垃圾焚烧厂渗滤液 总被引:2,自引:0,他引:2
采用"UASB+A/O+UF+NF"工艺处理生活垃圾焚烧厂渗滤液,工程规模为150 m3/d,工程总投资500万元,运行成本为25元/t;污泥处理工艺过程为:(剩余污泥+厌氧污泥)浓缩→脱水→焚烧。工程设计进水水质指标为ρ(COD)=50000 mg/L,ρ(BOD5)=25 000 mg/L,ρ(NH3-N)=600 mg/L,ρ(TP)=15 mg/L,ρ(SS)=9000 mg/L,出水主要水质指标为ρ(COD)≤50 mg/L,ρ(BOD5)≤15 mg/L,ρ(NH3-N)≤10 mg/L,ρ(TP)≤0.27 mg/L,ρ(SS)≤4 mg/L,补充到电厂循环冷却水中回用,不但实现了垃圾焚烧污水零排放,还有着较好的经济和环境效益。 相似文献
412.
In this paper, we propose a semiparametric survival model to investigate the pattern of spatial and temporal variation in
disease prevalence of chronic wasting disease (CWD) in wild deer in Wisconsin over the years 2002 and 2006. The semiparametric
survival model we suggested allows to build a more flexible model than the parametric model with fewer parametric assumptions
by modeling the baseline hazard using a Gamma process prior. Based on the proposed model, we investigate the geographical
distribution of CWD, and assess the effect of sex on disease prevalence. We use a Bayesian hierarchical framework where latent
parameters capture temporal and spatial trends in disease incidence, incorporating sex and spatially correlated random effects.
We also propose bivariate baseline hazard which change over age and time simultaneously to adopt different effects of age
and time on the baseline hazard. Inference is carried out by using MCMC simulation techniques in a fully Bayesian framework.
Our results suggest that disease has been spreaded mainly in the disease eradication zone and male deer show a significantly
higher infection probability than female deer. 相似文献
413.
Fe-C-H_2O_2协同催化氧化处理印染废水 总被引:3,自引:0,他引:3
用Fe-C-H2O2协同催化氧化体系对印染工业废水的降解脱色处理进行了研究。对影响印染废水降解的几种因素如铁屑/碳粒质量比、双氧水的质量分数、废水pH等进行考察。试验结果表明,对于色度为650度和ρ(COD)为468mg·L-1的印染废水,在废水pH=4.8的情况下,当铁屑/碳粒质量比为25∶1、H2O2用量为150mg·L-1、催化反应30min时,印染废水的脱色率达98%以上,CODCr去除率可达78%。与Fe-C微电解法相比,Fe-C-H2O2协同催化氧化方法对印染废水的脱色能力和去除COD,表现出了更好的处理效果。 相似文献
414.
Jinbao WU Zongqiang GONG Liyan ZHENG Yanli YI Jinghua JIN Xiaojun LI Peijun LI 《Frontiers of Environmental Science & Engineering》2010,4(4):387-394
Solubilizing experiments were carried out to evaluate the ability of biodiesel to remove polycyclic aromatic hydrocarbons (PAHs) from highly contaminated manufactured gas plant (MGP) and PAHs spiked soils with hydroxypropyl-β-cyclodextrin (HPCD) and tween 80 as comparisons. Biodiesel displayed the highest solubilities of phenanthrene (420.7 mg·L-1), pyrene (541.0 mg·L-1), and benzo(a)pyrene (436.3 mg·L-1). These corresponded to several fold increases relative to 10% HPCD and tween 80. Biodiesel showed a good efficiency for PAH removal from the spiked and MGP soils for both low molecular weight and high molecular weight PAHs at high concentrations. Biodiesel was the best agent for PAH removal from the spiked soils as compared with HPCD and tween 80; as over 77.9% of individual PAH were removed by biodiesel. Tween 80 also showed comparable capability with biodiesel for PAH solubilization at a concentration of 10% for the spiked soils. Biodiesel solubilized a wider range of PAHs as compared to HPCD and tween 80 for the MPG soils. At PAH concentrations of 229.6 and 996.9 mg·kg-1, biodiesel showed obvious advantage over the 10% HPCD and tween 80, because it removed higher than 80% of total PAH. In this study, a significant difference between PAH removals from the spiked and field MGP soils was observed; PAH removals from the MGP soil by HPCD and tween 80 were much lower than those from the spiked soil. These results demonstrate that the potential for utilizing biodiesel for remediation of highly PAH-contaminated soil has been established. 相似文献
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416.
Antonius Indarto Jae-Wook Choi Hwaung Lee Hyung Keun Song 《International Journal of Green Energy》2013,10(3):309-321
Decomposition of dichloromethane (CH2Cl2) using a gliding plasma was examined and reported in this paper. The effects of initial concentrations of CH2Cl2, total gas flow rates, and input frequency have been studied to evaluate the performance of gliding arc on CH2Cl2 decomposition. Using atmospheric pressure air as the carrier gas, experimental results indicate that the maximum conversion of CH2Cl2 was 95.1% at a total gas flow rate of 180 L/hr containing 1% by volume of CH2Cl2. The reaction occurred at an exothermic condition and gaseous products are dominated by CO, CHCl3, and Cl2. CO2 and CCl4 are also detected in the product stream in small amounts. The conversion of CH2Cl2 increases with the increasing applied voltage and decreasing total gas flow rate. 相似文献
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418.
微生物处理有机污染物是一种费用低,效果好,无二次污染且操作简单的处理方法。综述了国内外几种微生物处理有机污染物技术的研究进展。 相似文献
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