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Xiao R.,China Association of Environmental Protection Industry
China Textile and Apparel | Year: 2011

Cement processing brings challenges in controlling dust pollution. The hagtype filters applying to this industry have helped improved the situations.This article introduces some innovative materials for the textile filters. Source


Han B.J.,Beijing Municipal Institute of Labour Protection | Yue T.,Beijing Municipal Institute of Labour Protection | Jing P.,China Association of Environmental Protection Industry | Zuo P.L.,Beijing Municipal Institute of Labour Protection | And 3 more authors.
Applied Mechanics and Materials | Year: 2014

The aim of this paper is to investigate FGD gypsum quality from coal-fired power plants and its comprehensive utilization. FGD gypsum comprehensive utilization technologies mainly include employed in the wallboard manufacture, as cement retarders, as a construction material for roads and as a soil ameliorant. In China, FGD gypsum is mainly utilized to produce wallboard and as cement retarders. FGD gypsum comprehensive utilization technical route was proposed based on FGD gypsum produce, storage, transport and comprehensive utilization. In order to ensure FGD gypsum quality so that it can be well utilized, the following requirements should be satisfied: for FGD gypsum, moisture content (wet basis) should be no more than 10%; CaSO4·2H2O content should be no less than 90%; CaSO4·1/2H2O content should be no more than 0.5%; pH should be controlled between 5 and 9; Cl- content (dry basis) should be no more than 200 mg/kg. © (2014) Trans Tech Publications, Switzerland. Source


Jing P.,China Association of Environmental Protection Industry | Wang F.,Chinese Research Academy of Environmental Sciences | Zhu J.,Chinese Research Academy of Environmental Sciences | Cao Q.,Chinese Research Academy of Environmental Sciences | And 5 more authors.
Chinese Journal of Environmental Engineering | Year: 2015

Mercury speciation analysis was carried out based on US EPA Ontario Hydro Method (OHM), gaseous mercury removal performance of fabric filter (FF), electrostatic precipitator (ESP), and wet flue gas desulfurization (FGD) of two sets of 300 MW coal-fired units were analyzed. The test results showed the gaseous mercury removal efficiency of 32.50% and particulate mercury removal efficiency of 76.88% for ESP. While mercury removal efficiency of 44.33% and 99.92% attained for FF for gaseous mercury and particulate mercury, respectively. For wet FGD, the removal efficiency of 49.03% for oxide mercury was achieved. Mercury concentration of fly ash, bottom ash, and desulfurization gypsum were determined, and results showed that as high as 0.77 mg/kg for desulfurization gypsum attained, and mercury and its toxicity of coal combustion product had to be considered on its utilization. ©, 2015, Science Press. All right reserved. Source


Ding Y.H.,Beijing Municipal Institute of Labour Protection | Zuo P.L.,Beijing Municipal Institute of Labour Protection | Han B.J.,Beijing Municipal Institute of Labour Protection | Liu Y.,China Association of Environmental Protection Industry | And 4 more authors.
Advanced Materials Research | Year: 2014

Based on the status of primary PM2.5 emissions from cement kilns, steel sintering machines and primary PM2.5 control technology, the factors influencing primary PM2.5 emissions, emission standards, industrial policy and technology developing trends were analyzed. Above all, primary PM2.5 control technology roadmap for China's cement kilns and steel sintering machines was made. Based on the control scheme, the primary PM2.5 emissions from cement kilns and steel sintering machines are estimated to be 449,100 tons in 2020, 291,300 tons less than in 2011. The reduction rate is 39%. Finally, recommendations were proposed to control primary PM2.5 emissions from cement kilns and steel sintering machines. © (2014) Trans Tech Publications, Switzerland. Source


Yan J.,China Association of Environmental Protection Industry | Chen A.,Wuhan Water 1000 Environmental Engineering and Technology Co. | Zhang Y.,Wuhan Water 1000 Environmental Engineering and Technology Co. | Liu Y.,China Association of Environmental Protection Industry | Yan Z.,China Association of Environmental Protection Industry
Chinese Journal of Environmental Engineering | Year: 2014

The dimethyl sulfoxide (DMSO) wastewater is difficult to be treated because of the high chemical oxygen demand (COD) and the poor biochemical degradability. In this study, we used the wastewater from a plant that produced DMSO by the dimethyl sulfate as raw water. A pilot system of UV/H2O2/TiO2 combined with hydrolytic acidification-membrane bioreactor (MBR) process was designed and established. Then, the influences of UV/H2O2/TiO2, total dosage of oxidizers, pH, reaction time and hydraulic retention time on treatment effect were discussed. The result showed that the biodegradability of DMSO could be greatly improved by UV/H2O2/TiO2. The optimum process parameters were that the mass concentration ratio of H2O2 and COD was 2∶1, the pH was 4, the reaction time of hydrolytic acidification was 6 hours and the hydraulic retention time of MBR was 4 hours. Under the above conditions, the removal efficiency for COD (5000 mg/L) was above 98% and the effluent COD could meet the first criteria specified in Integrated Wastewater Discharge Standard (GB 8978-1996). Source

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