Novel Technologies for Emission Reduction   
By Wang Xuezhen      

China has its definitive national goal to reduce the emission of sulfur dioxide and COD by 10% before 2010. The emission of sulfur dioxide will be reduced to 22.95 million tons in 2010, compared to 25.49 million tons in 2005. And the emission of COD will be reduced to 12.73 million tons in 2010 while it was 14.14 million tons in 2005. Several plans will be carried out for the realization of this goal. Zhao Hualin, Director of Department of Pollution Control of Ministry of Environmental Protection, says that the Chinese government will enhance industrial pollution control, aiming at reducing 6 million tons emission of sulfur dioxide and 4 million tons of COD before 2010, and phase out the facilities with low efficiency and strengthen supervision of the production process.
    Many novel technologies for both pharmaceuticals and pesticide realms were showed in "3rd Emission Reduction Technologies for Fine and Specialty Chemical Industries Forum" held by the Fine and Specialty Chemicals Publications of CNCIC in Beijing on June 2nd & 3rd, 2009.
     "Catalytic Wet Air Oxidation(CWAO) owns merits of high efficiency, no secondary pollution, simple flow and small footprints, so it can be adopted in treating pesticide, dye and paper making wastewater which contains high concentration, high noxious and non-biodegradation organic chemicals." Chengdi from Shenyang Research Institute of Chemical Industry (SRICI) said, "In 2008 SRICI built an industrial demonstration of CAWO process which can daily treat 100 tons of ethyl chloride containing wastewater produced by organophosphorus pesticide manufactures, and it is still going on so well till now." She also pointed out that Liquid Membrane Extraction Technology (LMET) could be well used in treating wastewater that contains hydroxybenzene, cyanogen, nitrogen in ammonia, aniline, pyridine and other hetercyclic compounds. LMET has advantages of high separation velocity and low cost which contribute to its widely application.
    Xing Shubin from the National Environmental Protection Engineer Technical Center of Pharmaceutical Wastewater Pollution Control informed that all the pharmaceutical industries will produce COD containing wastewater (with COD concentration from 0.1 million ppm to several million ppm). He claimed that the wastewater should be treated by incineration instead of being dealt with in the wastewater treatment system directly. "As to wastewater treatment in pharmaceutical industries, biochemical technologies have been widely used", he added. He also indicated that advanced oxidation process was one of the most effective technologies for treating those being unable to be done by biochemical technologies.
    The wastewater treatment equipment companies including Jingjin Filter Press Group Co., Ltd, Beijing Machinery and Electricity Institute Co., Ltd. (BMEI) and Yixing Pengwei Sewage Treatment Equipment Co., Ltd. were present in the conference to show their productions. The equipment from BMEI showed its superiority in incineration - all wastes including dioxin can be wholly burned in about two minutes at the temperature of 1 100 degrees centigrade, and it can operate stably during the whole process.