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Tsinghua Science and Technology

Issue 3 • Sept. 2000

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Displaying Results 1 - 20 of 20
  • [Front cover]

    Publication Year: 2000, Page(s): c1
    IEEE is not the copyright holder of this material | PDF file iconPDF (1878 KB)
    Freely Available from IEEE
  • Contents

    Publication Year: 2000, Page(s): 1
    IEEE is not the copyright holder of this material | PDF file iconPDF (74 KB)
    Freely Available from IEEE
  • Performance of submerged membrane bioreactor for domestic wastewater treatment

    Publication Year: 2000, Page(s):237 - 240
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (610 KB)

    In the present research, a submerged membrane bioreactor was tested to treat domestic wastewater. Three experimental runs were conducted all with a hydraulic retention time of 5 h and sludge retention times (SRTs) of 5, 10, and 20 d. The pollutant removal performance of the membrane bioreactor, the membrane effluent quality, and a kinetic model for sludge growth in the bioreactor were investigated... View full abstract»

    Open Access
  • Bioadsorption of 4-chlorophenol to the activated sludge

    Publication Year: 2000, Page(s):241 - 245
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (726 KB)

    The adsorption behaviour of 4-chlorophenol from aqueous solution to activated sludge — was quantitatively characterized in this paper. The effects of the initial pH values, initial chlorophenol concentration and adsorbent dosage on bloadsorptlon were investigated. The maximum adsorption capacity was found to be 110.5 mg/g at 100 mg/L iniiial concentration. The Freundlich and Langmui r adsor... View full abstract»

    Open Access
  • Developments in biological treatment of industrial wastewaters

    Publication Year: 2000, Page(s):246 - 251
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (960 KB)

    The characteristics and biological treatment technologies of several kinds of industrial wastewater are summarised. Biological treatment of industrial wastewater is a well-established system with applications going back for over a century. However, developments are still taking place but at the design stage, more emphasis will be placed on small “tootprint” systems, odour control and... View full abstract»

    Open Access
  • Study on SO2 emission mitigation of thermal power plants in China

    Publication Year: 2000, Page(s):252 - 261
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1653 KB)

    With the rapid development of electricity production, SO2 from coal-fired power stations causes severe air pollution problem. In 1997, the SO2 emitted from thermal power plants reached 7.,0 Mt, accounting for about 33% of the national emissions. At present and in the future, thermal power stations will still be the primary pollution sources. The Chinese government and power d... View full abstract»

    Open Access
  • New developments in spinning fluidised bed incineration technology

    Publication Year: 2000, Page(s):262 - 269
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1831 KB)

    At the present time, the sewage treatment plants in the UK produce about 25 million tons of sewage sludge each year at a concentration of 4% solids. New regulations forbid sea dumping and in the near future new incinerators will be required to dispose of about 5 million tons per year. Bubbling fluidised bed incinerators are widely used to burn sewage sludge at a typical consumption rate of about 0... View full abstract»

    Open Access
  • Mapping critical loads of acid deposition for soils in China

    Publication Year: 2000, Page(s):270 - 278
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (3251 KB)

    A method described is to produce critical load maps of acid deposition for soils in China. Critical loads were assigned to the most sensitive soil in each 0.1° × 0.1° grid square of China based on the Skokloster classification[l] and adjusted for temperature and land use. The map shows that soils with small critical load (< 0. 5 keq • ha-1 • a-I... View full abstract»

    Open Access
  • Controlling pathogens and allergens in composting

    Publication Year: 2000, Page(s):279 - 282
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (563 KB)

    The process options for control of pathogens in the windrow and ASP (aerated static pile) are considered based on indicator organisms for the incoming pathogens with MSW and sludge as feedstock. Some European process requirements rements for sanitisation are considered in relation to the actual conditions within a composting mass where temperatures across the mass vary from 70°C to ambient.... View full abstract»

    Open Access
  • Ceramic ultra filtration membrane bioreactor for domestic wastewater treatment

    Publication Year: 2000, Page(s):283 - 287
    Cited by:  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (707 KB)

    A long term domestic wastewater treatment experiment was conducted using a recirculating ceramic ultra filtration membrane bioreactor (CUFMB) system. Three experiments were run with a hydraulic retention time of 5 h, sludge retention times of 5 d, 15 d, and 30 d and a membrane surface flow rate of 4 m/s. The experiment studied the membrane fouling mechanism and cleaning techniques. The results sho... View full abstract»

    Open Access
  • Vehicles and particulate air pollution

    Publication Year: 2000, Page(s):288 - 292
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (722 KB)

    The current scene relating to particles and vehicular emissions in UK is reviewed. The active research topics are health effects of particles, particle size and composition, modeling the fate of particles and assessing individual exposure. There is a National Air Quality Strategy combined with local air quality management which includes monitoring and assessment, dispersion modeling and developmen... View full abstract»

    Open Access
  • Transport and degradation of phenol in groundwater at Four Ashes

    Publication Year: 2000, Page(s):293 - 297
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (785 KB)

    Drift deposits and Triassic Sandstone of the Bromsgrove and Wildmoor Formations, 700 m thick, form the main aquifers at Four Ashes. The coal tar and products from early plant and tank storage facilities constructed over unprotected ground directly and indirectly caused significant groundwater pollution. The organic pollutants include phenol, cresol, and xylenol. The maximum phenol concentration in... View full abstract»

    Open Access
  • Water quality management of Beijing in China

    Publication Year: 2000, Page(s):298 - 305
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1478 KB)

    At present, Beijing's water resources are insufficient and will become the limiting factor for sustainable development for the city in the near future. Although efforts have been made to control pollution, water quality degradation has occurred in some of the important surface water supplies, aggravating the water resource shortage. At present, approximately three quarters of the city's wastewater... View full abstract»

    Open Access
  • Natural biological attenuation of Benzene in groundwater

    Publication Year: 2000, Page(s):306 - 309
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (531 KB)

    Benzene has been found in subsurface unsaturated soil and groundwater beneath a petro-chemical plant. Although the groundwater contained several mg/L of benzene in the area immediately beneath the source, benzene was not detected in monitoring wells approximately 800 m down stream. All kinds of physical processes such as adsorption and advection/dispersion are considered to account for the observe... View full abstract»

    Open Access
  • Assessing mine water pollution: Geochemical principles

    Publication Year: 2000, Page(s):310 - 314
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (713 KB)

    The relative abundance and weathering rate of minerals that produce and consume acidity dictates whether a mine water discharge will be acidic or alkaline. Because metal ion solubility generally decreases with increasing pH, acidic waters are associated with greater riskfrom dissolved metals loads, while alkaline waters area associated with environmental degradation due to the oxidative precipitat... View full abstract»

    Open Access
  • Natural biodegradation of phenolic compounds in groundwater

    Publication Year: 2000, Page(s):315 - 322
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (2049 KB)

    A combination of field data and theoretical approaches is used to assess the natural attenuation and status of a complex plume of phenolic compounds (phenol, cresols, xylenols) in a deep, consolidated, UK Permo-Triassic sandstone aquifer. Biodegradation on of the phenol at compounds at concentrations up to 12 500 mg • L−1 is occurring under aerobic, NO3... View full abstract»

    Open Access
  • Joint implementation analysis: A case study of the Japan-China Coke Dry Quenching (CDQ) project

    Publication Year: 2000, Page(s):323 - 327
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (828 KB)

    One of the key issues for “Joint Implementation” is how to define a plausible baseline, a necessary benchmark for calculating net Greenhouse Gases (GHGs) emission reductions through a comparative approach. Based on a thorough case study of the China-Japan Coke Dry Quenching (CDQ) project, the first approved pilot project in China under the “Activities Implemented Jointlyȁ... View full abstract»

    Open Access
  • Emission baselines for clean development mechanism projects: Residential heating case in Beijing

    Publication Year: 2000, Page(s):328 - 332
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (763 KB)

    To explore emission baseline, technically the most difficult issue for Clean Development Mechanism (CDM) project development, as well as to examine whether CDM is a possible way to help Beijing restructure its heating energy consumption, this paper conducts a CDM baseline case study on residential heating in Beijing. Based on investigation, energy consumption forecast and economic analysis of futu... View full abstract»

    Open Access
  • Removal of organic pollutants in municipal wastewater for artificial groundwater recharge

    Publication Year: 2000, Page(s):333 - 337
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (697 KB)

    In order to construct a demonstration artificial groundwater recharge system for wastewater reuse in China, three years of laboratory work has been conducted on advanced treatment technologies in combination with soil aquifer treatment of secondary effluent from sewage treatment plants. An effective and inexpensive process was selected, which uses DGB adsorption, PAC coagulation, sedimentation, sa... View full abstract»

    Open Access
  • Information for authors

    Publication Year: 2000, Page(s): 338
    IEEE is not the copyright holder of this material | PDF file iconPDF (152 KB)
    Freely Available from IEEE

Aims & Scope

Tsinghua Science and Technology (Tsinghua Sci Technol) aims to highlight scientific achievements in computer science, electronic engineering, and other IT fields. Contributions all over the world are welcome.

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Meet Our Editors

Editor-in-Chief
Professor Jiaguang Sun
School of Software
Tsinghua University
Beijing  100084 China
journal@tsinghua.edu.cn
Phone:86-10-62771385