sludge regulations Articles

  • A combined reed bed/freezing bed technology for septage treatment and reuse in cold climate regions

    A combined reed bed-freezing bed (RB-FB) technology was effective at treating septage under Canadian climatic conditions over a 5-year period with average loading rates of 82–104 kg TS/m2/y. Varying hydraulic and solid loading rates as well as the increasing sludge cake with time had little to no effect on treatment efficiency, with almost complete removal of organic matter, solids, heavy ...


    By IWA Publishing

  • Life cycle assessment of sludge management with phosphorus utilisation and improved hygienisation in Sweden

    To provide input to sewage sludge management strategies that address expected new regulations in terms of hygienisation and phosphorus recovery in Sweden, an environmental life cycle assessment (LCA) was made. The LCA identified environmental hot spots for methods that may permit sludge or phosphorus from sludge to be applied on agricultural land. In particular, thermophilic digestion, ...


    By IWA Publishing

  • Evaluation of leached metals in recovered aluminum coagulants from water treatment slurry

    The water treatment industry consumes large quantities of coagulant and produces huge amounts of slurry. The cost of alum used in water treatment, stringent regulations and negative impacts of sludge disposal are the motive to do integrated research studies on the technical feasibility of aluminum coagulant recovery from sludge using acidification. This work studied the leaching of iron, ...


    By IWA Publishing

  • Effect of lime addition during sewage sludge treatment on characteristics of resulting SSA when it is used in cementitious materials

    Final disposal of sewage sludge is important not only in terms of satisfying the regulations, but the aspect of choosing the optimal wastewater treatment technology, including the sludge treatment. In most EU countries, significant amounts of stabilized and dewatered sludge are incinerated, and sewage sludge ash (SSA) is generated as a by product. At the same time, lime is one of the commonly ...


    By IWA Publishing

  • Design of a generalized predictive controller for a biological wastewater treatment plant

    This paper presents a generalized predictive control (GPC) technique to regulate the activated sludge process found in a bioreactor used in wastewater treatment. The control strategy can track dissolved oxygen setpoint changes quickly, adapting to the system uncertainties and disturbances. Tests occur on an Activated Sludge Model No. 1 benchmark of an activated sludge process. A T filter ...


    By IWA Publishing

  • ATAD control goals through the analysis of process variables and evaluation of quality, production and cost

    The aim of this paper is to establish and quantify different operational goals and control strategies in autothermal thermophilic aerobic digestion (ATAD). This technology appears as an alternative to conventional sludge digestion systems. During the batch-mode reaction, high temperatures promote sludge stabilization and pasteurization. The digester temperature is usually the only online, ...


    By IWA Publishing

  • Landfill eliminates nuisance odors, saves a large revenue stream and increases profits

    The Problem - Neighbors surrounding a southwestern Ohio landfill were outraged by the offensive odors emanating from the site's sludge processing operations. The neighbors complained to local and state regulators every time a load of the offending material was delivered for processing. The site had to do something otherwise they were going to lose the lucrative sludge disposal contract. ...


    By Benzaco Scientific, Inc.

  • Evaluation of DEWATS in Java, Indonesia

    Under the Indonesian PPSP (Accelerated Sanitation Development for Human Settlements Program) thousands of new DEWATS (Decentralized Wastewater Treatment Systems) may be realized in the coming five years. Taking the massive scale of planned implementation into consideration an evaluation of the technical and financial-economic aspects and users' involvement for three different types of ...


    By IWA Publishing

  • Lime stabilization of Septage - San Fernando, La Union

    In mid-2008, engineers and staff from the San Fernando City health, planning, environment and engineering offices engaged in the first stage of a pilot demonstration project to determine the effectiveness of lime stabilization as a method of treating domestic septage in the Philippines. The Department of Health in the Philippines (DOH) also recognizes that lime stabilization is a viable ...


    By IWA Publishing

  • Recycling of Basic Oxygen Furnace (BOF) sludge in iron and steel works

    The recycling and utilisation of iron-bearing by-products such as dust, scale and sludge has been tried and is being practised in many iron and steel-making industries due to its associated benefits. However, the high moisture content of the Basic Oxygen Furnace (BOF) sludge (35?40%) is a major obstacle in its recycling. The management of this waste has become an important issue due to ...


    By Inderscience Publishers

  • Viability of Ascaris and other helminth genera non larval eggs in different conditions of temperature, lime (pH) and humidity

    Helminth eggs are the pathogens most resistant to inactivation during sludge and wastewater treatment. For this reason, in several regulations and the WHO guidelines for wastewater and excreta reuse for agriculture and aquaculture they are considered as indicators of the performance of the treatment process. Conditions required to inactivate helminth eggs, notably Ascaris lumbricoides, are ...


    By IWA Publishing

  • A comaprative perspective of US and UK thinking on e coli reactivation in digestion and dewatering

    Presentation Outline UK and US rules in Pathogens History of Reactivation/Regrowth in US WERF Projects Correlation to odors UK Situation Conclusions US and UK regulations The USEPA regulations are mandatory USEPA 503.15 The Class A pathogen requirements on 503.32 (a) or the Class B ...


    By Cambi Group AS

  • In-Transit Sludge - Odor Control

    Products & Equipment Used: Pneumatic Foam Unit NT/5 (ELECTRIC) AC-904 (BLACK) Long Duration Foam AC-905 (RED) Long Duration Foam Application Summary: The Lynn (MA) Water and Sewer Commission's (LWSC) incinerator, dedicated for burning sewage sludge, was shut down because of emissions that exceeded regulatory limits. LWSC ...


    By Rusmar Inc.

  • Sludge Landfill - Odor Control

    Products & Equipment Used: Pneumatic Foam Unit 1600/40 AC-920 Long Duration Foam Application Summary: The Lynn (MA) Water and Sewer Commission's incinerator, dedicated for burning secondary sewage sludge, was shut down because of stack emissions that exceeded regulatory standards. The sludge that was usually burned had to be placed ...


    By Rusmar Inc.

  • Legal Lookout: Redefining solid waste

    Some hazardous secondary materials excluded from EPA's revised definition under RCRA. The definition of solid waste has long been the subject of controversy. At the heart of the debate is what constitutes 'discard,' versus legitimate recycle or reuse such that RCRA regulation should not apply. This question has been especially vexing for secondary materials, including spent materials, listed ...


    By Bergeson & Campbell, P.C.

  • Biosolids sampling and handling approaches for microbial analyses

     ABSTRACT The protection of human health and the environment while making the use of biosolids products more practical is a joint goal of utilities and regulatory agencies. Assuring the safety of biosolids is paramount to gaining wide public acceptance of this waste-to-beneficial use product. Making effective decisions about the safety of biosolids use relies on quality data. Satisfying ...

  • Pressure-loss computation procedures for non-Newtonian pipe flow

    Wastewater sludge with solids concentrations above about 2 percent exhibit non-Newtonian behavior, i.e., the sludge apparent viscosity changes with the shear rate (flow velocity). To determine pipeline head loss for sludge streams to and from anaerobic digesters, samples of primary, secondary and digested sludge were collected from Orange County Sanitation District Plant No. 1 and analyzed to ...

  • Insurance regarding radical uncertainty: approaches in France and in Germany for sewage sludge land spreading

    Up to now, economic literature regarding the product safety has studied foreseeable risks that are known by producers. However, the literature has not analysed which liability rule and insurance schemes are efficient for radical uncertainty. This paper addresses this topic through insurance schemes in France and Germany for sewage sludge spreading. Section 1 gives an overview of economic ...


    By Inderscience Publishers

  • Transportation of digested sludges over extreme distances

    Sludge is a residual product of sewage treatment that, as a rule, is digested and concentrated. In larger processing plants, it is dehydrated, partially dried and subsequently utilised in other processes. This usually takes the form of incineration and subsequent use as an additive to building materials by the cement industry. In the sewage treatment plant (STP) of the local authorities ...


    By ALLWEILER GmbH

  • Improved Anaerobic Digestion Feed Systems and Concepts

    The sludge feed systems for anaerobic digestion facilities at wastewater plants in North America have been and continue to be modified and upgraded for a variety of reasons. These reasons include operational problems and issues, evolution from prior primary-sludge-only digestion facilities, performance-based reasons, regulatory-based reasons, and include the desire to improve the digestion ...

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