sewage sludge treatment Articles

  • Sewage sludge management in Malaysia

    This paper describes the current status of sewage sludge management in Malaysia, including sludge characteristics from both communal sewage treatment facilities and septic tanks. The levels of potentially toxic elements in the sludge are defined and compared to levels elsewhere in the context of the suitability of the sludge for agricultural use. Current sludge disposal practices are reviewed and ...


    By Inderscience Publishers

  • Study on sewage sludge gasification

    Aimed at creating new technology to reduct greenhouse gas emission, the Tokyo Bureau of Sewerage has developed a system generating electricity with a gas engine using biogas generated by pyrolytic gasification of sewage sludge in a fluidized-bed gasifier. A 15t/d demonstration facility was built based on a dehydrated sludge and demonstration tests were run for 3400 hours from 2005. As a result of ...

  • Toluene in sewage and sludge in wastewater treatment plants

    Toluene is a compound that often occurs in municipal wastewater ranging from detectable levels up to 237 μg/L. Before the year 2000, the presence of the aromatic hydrocarbons was assigned only to external sources. The Enhanced Biological Nutrients Removal Processes (EBNRP) work according to many different schemes and technologies. For high-efficiency biological denitrification and ...


    By IWA Publishing

  • Continuous Pyrolysis Facility for Sewage Sludge Treatment

    The amount of sewage sludge is catastrophically increased in the latest few decades due to functioning of the municipal sewage treatment facilities. Dry sewage sludge contains 70-90% of the organic substances and 10-30% of the inorganic substances, which are dangerous for human health in case of inappropriate utilization. The continuous pyrolysis technology presents the unique sewage sludge ...


    By Polvax-Ukraine

  • Kemicond - Improvement of the Dewaterability of Sewage Sludge by Chemical Treatment

    The Kemicond process for sludge conditioning consists of a chemical treatment with sulphuric acid and hydrogen peroxide at a pH-value around 4 followed by a dewatering unit. It is shown that through the chemical treatment of ferruginous digested sludge the dewaterability, measured in laboratory experiments as CST-value, can be improved. From the results of the experiments, it is concluded that ...

  • Ozone treatment of organic micro-pollutants in sewage sludge

    Organic micro-pollutants accumulate to a certain extent in sewage sludge and are therefore ecologically relevant if the sludge is to be reused in both agriculture and landscaping applications. This paper describes the degradation of endocrine-disrupting compounds and other micro-contaminants by means of ozone and ultrasonic treatment. One of the findings is that, as expected, aromatic compounds ...


    By IWA Publishing

  • Analysis of Sewage and Sewage Sludge by Simultaneous ICP Spectroscopy

    In recent years, the development and expansion of sewage treatment facilities has resulted in increased amounts of sludge which is generated in the treatment process, and which has presented a problem due to processing of the sludge itself. Sludge is normally incinerated or solidified and then disposed of in landfills or recycled for use in construction materials such as concrete or ...

  • Co-fermentation of sewage sludge and biowastes

    The anaerobic treatment of sewage sludge has a long history in Germany. It began early in the Twentieth Century with the development of the Imhoff tank and has, since then, been con-tinuously further developed. Today, anaerobic sludge digestion is the most widely used process for stabilizing sewage sludges. Digesters, in which a portion of the sewage sludge is converted into utilizable biogas ...


    By ORBIT e.V.

  • Pollutants in Urban Wastewater and Sewage Sludge

    Untitled Document Executive Summary Water policy in the European Union is aiming to promote sustainable water use and a major ...

  • Recovery of Phosphorus from Sewage Sludge

    In the following, a method to recover phosphorus from sewage sludge as MAP (magnesiumammonium- phosphate, also called struvite) is to be presented. The process uses sulfuric acid to leach phosphorus out of digested sewage sludge. After solid-/liquid-separation, interfering metal ions in the liquid phase are inactivated through complexation. For the subsequent precipitation of the phosphorus, ...

  • Sewage Sludge Recycling to Land and Disposal

    The Problem: Sewage treatment is the process of removing contaminants from wastewater, primarily from household sewage. It includes physical, chemical, and biological processes to remove these contaminants and produce environmentally safe treated wastewater (or treated effluent). A by-product of sewage treatment is usually a semi-solid waste or slurry, called sewage sludge, that has to ...


    By Dirk European Holdings LTD

  • Sewage treatment plant

    BONO ARTES has developed an activated sludge process called BIOCLAR, which is a great technological step forwards compared to conventional methods. A large part of civil and industrial installations, especially in developing countries, is located in remote and secluded areas where there is no possibility for connection to a public sewer. On the other hand, the minimisation of the impact on the ...


    By Artes Ingegneria SpA

  • Treatment of sewage sludge using super critical water oxidation-an up date

    Supercritical water oxidation (SCWO) is an innovative, economic and incredibly effective destruction method for organic wastewater and sludge and is a realistic alternative to conventional methods. From 1998 to 2007 extensive evaluations of the destruction of sewage sludge by SCWO were performed by Chematur Engineering AB on two state of the art pilot plants. These units had capacities of 250 ...


    By SCFI Group Limited

  • Image analysis of sludge aggregates obtained at preliminary treatment of sewage

    The results of wastewater treatment by Al and Fe salts and by electrocoagulation with aluminum electrodes are discussed and interpreted. Those processes used alone or combined with biological treatment, were analyzed for 50 and 90% removal of phosphates. Scanning electron microscopy (SEM) of the resulting sludge from three coagulation processes defined the perimeter P and area ...


    By IWA Publishing

  • Sewage sludge treatment: evaluation of the energy potential and methane emissions with COD balancing

    Sewage sludge is an important resource for the generation of electricity and heat within a wastewater treatment plant (WWTP). Taking a holistic approach to such use involves considering the greenhouse gas emissions. In particular, for anaerobic sludge treatment, methane emissions are a matter of concern. Therefore, the utilization of a carbon balance, based on the chemical oxygen demand (COD), ...


    By IWA Publishing

  • Continuous on-line monitoring of dissolved oxygen in the activated sludge of a sewage treatment plant

    Dissolved oxygen is traditionally measured using a Clark cell, which relies upon a gas-permeable membrane for its opera-tion. Such sensors are subject to fouling with subsequent loss of accuracy, making frequent maintenance and calibration necessary. The objective of this development was to take advantage of specific properties of microelectrode arrays, such as low flow-dependence, insensitivity ...


  • Sludge Treatment and Disposal Technologies

    Most wastewater treatment processes produce a by-product that purifies wastewater before it is released into local waterways. This by-product is named as sludge. Typically in solid, semi-solid or liquid state, it is in fact an amalgamation of all the liquid wastes that are discharged by domestic houses, commercial properties, industry, and/or agriculture after aerobic biological treatment. ...


    By IWA Publishing

  • Ultrasonic Waste and Sludge Treatment

    Biogas is generated from sources, such as municipal organic waste, sewage sludge, muck or manure. Ultrasonication improves the digestibility of such organic material leading to more biogas and less residual sludge. Biogas is a byproduct of the decomposition of organic matter by anaerobic or aerobic bacteria. It consists primarily of methane, carbon dioxide and hydrogen sulfide. This makes biogas ...

  • Sewage treatment plant case study

    Contributing to snowy regions in which the transportation of sludge is difficult In municipal wastewater treatment plant in snowy regions, snow-bound in winter, taking dewatered cake out regularly is sometimes difficult. Two problems were also presented in this municipal wastewater treatment plant, i.e., the difficulty of taking sludge out using carriers in winter, which had been ...


    By AMCON Inc.

  • Management of sewage sludge and ash containing radioactive materials

    Approximately 50% of the seven to eight million metric tonnes of municipal sewage sludge produced annually in the US is reused. Beneficial uses of sewage sludge include agricultural land application, land reclamation, forestry, and various commercial applications. Excessive levels of contaminants, however, can limit the potential usefulness of land-applied sewage sludge. A recently completed ...


    By Inderscience Publishers

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