municipal sludge Articles

  • Recycling municipal sludge with portable dredges

    Policing the pit. With today's emphasis on resource recovery, even burdensome and seemingly worthless materials are becoming increasingly valuable. Take municipal sludge, for example. For sewage treatment facilities wrestling with the problem of sludge disposal, Liquid Waste Technology may have the answer. The New Richmond, Wisconsin, USA company manufactures dredges and lagoon pumping equipment ...

  • Safe Recycling of Municipal Sludge by Gamma Radiation

    Abstract Municipal sludge contains many toxic organic materials, large number of pathogenic microorganisms, heavy metals alongside many nutrients beneficial to plant and/or animal growth, but its use is limited due to these health hazards contaminants. The technology of irradiation-pasteurization has been shown to quickly, efficiently and reliably deal with potential health hazards ...


  • Co-composting of sewage sludge and municipal solid waste

    Israel production of sewage sludge and MSW grows each year due to the increasing number of modern Wastewater plants that are using activated sludge process and the increasing population. Non-stabilized Sewage sludge is an environmental nuisance due to high level of pathogens, offensive odours, insect attraction and potential water sources pollution. The Haifa region itself, where the study took ...


    By ORBIT e.V.

  • Review on municipal sewage sludge management in Turkey and Europe

    The main purpose of this paper is to point out the development of the sewage sludge quantity in Turkey and in Europe by reviewing different studies to detect trends, which are characterised by legal framework and different disposal routes. Additionally, it should be elaborated if an increase in the amount of sewage sludge has to be expected and which reasons are indicated. Because of the ...


    By Inderscience Publishers

  • Quantifying Sludge Production in Municipal Treatment Plants

    ABSTRACT This paper addresses the issue of sludge production in plants treating municipal wastewater. The historical understanding and quantification of sludge production in activated sludge systems is reviewed briefly. An important factor is the selection of three parameters used in the estimation of sludge production (and carbonaceous oxygen requirements). These are the yield coefficient ...

  • White Paper: Cyclical Aeration Control- Combining Aerobic & Anoxic Conditions in One Basin

    Increase Water Quality with Cyclical Aeration With increased effluent pollution restrictions on municipal wastewater treatment plants, cities are pressed to find ways to economically increase their effluent quality with little to no funding. Many new NPDES permits ...

  • Case study - Procurement and installation of a Biogas desulphurization unit at the Chania WWTP

    A proposal based on Bioconservacion’s technology was selected as the winning bid in the public tender released in 2015, covering the design, procurement and construction of a biogas desulfurizing unit to be installed in the waste water treatment plant in Chania, Greece. With a population over 100,000, Chania is the second largest municipality in the Greek island of Crete. Its waste water ...


    By Bioconservacion SA

  • Seven Ways Your Facility Isn’t Meeting Effluent Regulations and How to Solve Them

    Whether you own, operate, or help manage a municipal or industrial facility that deals with wastewater, it’s important to understand how wastewater treatment can play a significant role in the overall health of your business, especially when it comes to meeting effluent regulations. This is an important part of the wastewater treatment process to consider, as ignoring it could earn your ...


    By SAMCO Technologies, Inc.

  • Sustainable reuse potential of municipal sewage sludge in south–east Australia

    With the aim of reusing municipal sewage sludge, this paper presents the chemical and organic properties of sludge from a major sewage treatment plant in south–eastern Australia. The results show that the concentrations of all OCPs and majority of PAHs were below or close to laboratory detection limits. Concentrations of heavy metals in sludge samples were compared with typical sludge testing ...


    By Inderscience Publishers

  • Primozone solves problem with filamentous sludge - Municipal Case Study

    Öresundsverket WWTP has with the installation of the Primozone ozone plant been able to reduce problems with filamentous sludge and at the same time increase capacityon water throughput. At Öresundsverket WWTP in Helsingborg,Sweden, they have problems with filamentous sludge during springtime, as do many other activated sludge plants.With ozonation of the return sludge flow ...


    By Primozone Production AB

  • Recycling of Municipal Wastes in Agriculture. I. Sewage Sludge Application to Corn Crop

    Abstract A two year’s field experiment (1995 and 1996) was conducted on a Typic Xerofluvent in order to study the influence of sewage sludge application on corn yield and nutrient uptake. Treatments included control (no sewage sludge, no mineral fertilisation), mineral fertilization (no sewage sludge) and sewage sludge application in total rates from 50 to 130 ton.ha-1 dry sewage sludge, applied ...


  • Optimization of municipal sludge and grease co-digestion using disintegration technologies

    Many drivers tend to foster the development of renewable energy production in wastewater treatment plants as many expectations rely upon energy recovery from sewage sludge, for example through biogas use. This paper is focused on the assessment of grease waste (GW) as an adequate substrate for co-digestion with municipal sludge, as it has a methane potential of 479–710 LCH4/kg VS, as well as the ...


    By IWA Publishing

  • Isotherms for the biosorption of Cr (VI) using excess municipal sludge

    Heavy metals are one of the most important pollutants in industrial wastewater. Chromium is one of the hazardous metals which is used in electroplating, leather tanning, metal finishing and chromate manufacturing industries. The commonly used procedures for removing metal ions from aqueous streams include chemical precipitation, coagulation, ion exchange, reverse osmosis and adsorption. In this ...


    By Inderscience Publishers

  • Effect of hydraulic retention time on pretreatment of blended municipal sludge

    The objective of the present work was to evaluate the effect of hydraulic retention time (HRT) on hydrolysis and acidogenesis for the pretreatment processes: acid phase digestion (APD) and autothermal thermophilic aerobic digestion (ATAD) using blended municipal sludge. The effect of the different pretreatment steps on mesophilic anaerobic digestion (MAD) was evaluated in terms of methane yield, ...


    By IWA Publishing

  • Effects of thermal hydrolysis temperature on physical characteristics of municipal sludge

    Effects of thermal hydrolysis temperature on the physical properties of municipal sludge was further studied by a series of experiments. There was a decrease in bound water content with an increase in hydrolysis temperature, while there was an increase in pH at temperatures below 120 °C, and a decrease at temperatures exceeding 120 °C. An analysis of settleability, centrifugation and vacuum ...


    By IWA Publishing

  • The influence of temperature and SRT on high-solid digestion of municipal sewage sludge

    The influence of temperature and solids retention time (SRT) on high-solid digestion of municipal sewage sludge was investigated in laboratory-scale reactors. Digestion with high-solid concentration reduces the required digestion volume and is advantageous for urban areas. The experimental conditions comprised total suspended solids (TSS) in digested sludge between 4.0 and 4.6%, temperatures ...


    By IWA Publishing

  • Polyhydroxyalkanoate (PHA) production from sludge and municipal wastewater treatment

    Polyhydroxyalkanoates (PHAs) are biodegradable polyesters with comparable properties to some petroleum-based polyolefins. PHA production can be achieved in open, mixed microbial cultures and thereby coupled to wastewater and solid residual treatment. In this context, waste organic matter is utilised as a carbon source in activated sludge biological treatment for biopolymer synthesis. Within the ...


    By IWA Publishing

  • Pyrolysis properties of municipal sewage sludge with ZnCl2 activation under the N2 atmosphere

    The municipal sewage sludge with ZnCl2 activation was pyrolysed to obtain useful porous adsorbents. The thermogravimetric analysis and FTIR methods were used to work out the properties of dried sewage sludge with ZnCl2 activation from the Changsha secondary wastewater-treatment plant. The experimental results showed that three stages of weight loss were observed under the heating rates of ...


    By Inderscience Publishers

  • Modeling anaerobic digestion of municipal wastewater sludges: an elemental approach

    An experimental study that examined the elemental composition of waste activated sludge as it progressed through mesophilic and thermophilic anaerobic digestion was completed. It was found that the oxygen mass fraction of the VSS increased while the carbon content decreased as digestion progressed. Small differences were observed in the responses observed for mesophilic and thermophilic digestion ...

  • Chitosan use in chemical conditioning for dewatering municipal-activated sludge

    This work aims to evaluate the potential use of chitosan as an eco-friendly flocculant in chemical conditioning of municipal-activated sludge. Chitosan effectiveness was compared with synthetic cationic polyelectrolyte Sedipur CF802 (Sed CF802) and ferric chloride (FeCl3). In this context, raw sludge samples from Beni-Messous wastewater treatment plant (WWTP) were tested. The classic jar test ...


    By IWA Publishing

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