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Technical measures to achieve a cleaner production mode for recycled paper mills

Frontiers of Environmental Science & Engineering 2010年第4期4卷 466-474页

作者： Chao HE Zhaolin GU Shucheng YANG Jidong LIANG Weina DAI Yanling HE School of Mechanical Engineering Xi’an Jiaotong UniversityXi’an 710049China School of Human Settlements and Civil Engineering Xi’an Jiaotong UniversityXi’an 710049China Department of Environmental Science and Engineering Xi’an Jiaotong UniversityXi’an 710028China

China’s paper production reached 79.8×10^(6) t in 2008 and ranked number one in the world.Because of its high consumption of water,energy and materials and its serious pollution,the present processes are not likely to be sustainable.An alternative,the closed Water Loop-papermaking Integration(WLPI)method,is put forward in this paper.The WLPI method can be realized in a recycled paper mill by adding technologies and using recycled water.Many industrial case studies have shown that a large quantity of water,energy and materials can be saved,and the quantity of waste sludge and wastewater discharge was minimized by using the WLPI method.The design of the water reuse system,control of calcium hardness,water recycling and minimal waste sludge are discussed.Anaerobic technology plays an important role in the WLPI method to lower cost,energy use and waste.In the brown paper and coated white board production,zeroeffluent discharge can be realized.Fresh water consumption is only 1-2m^(3)·t^(-1).For the paper mills with deinking and bleaching processes,about 10 m^(3)·t^(-1) of fresh water and a similar amount of effluent discharge are needed.Power saving using anaerobic technology is 70%when recycled water is used in comparison with the conventional activated sludge process.Waste sludge can be decreased to about 5%of the initial process due to reuse of the waste sludge and the lower bio-sludge production of the anaerobic process.

关键词： water reuse zero discharge anaerobic treatment recycled paper cleaner production

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Quantitative Analysis of Bisphenol A in recycled paper with a Novel Direct Inlet Probe-Atmospheric Pressure Photoionization–IonTrap-MS

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Journal of Analysis and Testing 2017年第3期1卷 255-263页

作者： Simeon Horst Oliver J.Schmitz Applied Analytical Chemistry University of Duisburg-EssenUniversitaetsstr.545141 EssenGermany

A new ambient ion source was developed and its application to real samples has been demonstrated.This ion source is based on a previously build ion source using chemical ionization under atmospheric pressure and extractive electrospray ionization(DIP-APCI/EESI).To enhance the range of analytes,we added to this ion source a photoionization lamp to enable also photoionization,which allows the possibility to analyze polar(EESI),middle(APCI)and non-polar(APPI)analytes with the same source and with no or only a small change of the setup.In comparison with DIP-APCI,this ion source reaches similar analytical limits but shows better sensitivity for some aromatic and non-polar analytes.The analysis of bisphenol A from extracts of recycled paper demonstrates the use of this ion source for real samples.Quantification was possible by the use of a deuterated internal standard that was added to the papers before extraction.Here atmospheric pressure chemical ionization leads to bad results due to ion suppression,whereas atmospheric pressure photoionization shows results that fit to literature values.

关键词： Ambient ionization Bisphenol A Atmospheric pressure photoionization DIP-APPI recycled paper

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