sewage sludge processing Articles
-
Sewage sludge minimisation by means of wet oxidation: process performance and economic sustainability
Today, several technologies and management strategies are proposed and applied in WWTPs to minimise sludge production and contamination and their techno–economic feasibility has to be carefully evaluated. In this work (which is being conducted within the European Union project 'ROUTES'), based on bench results, a mass balance was drawn for a WWTP (500,000 PE), where it was supposed to install a ...
-
Application of acidic thermal treatment for one- and two-stage anaerobic digestion of sewage sludge
The effectiveness of acidic thermal treatment (ATT) was examined in a 106-day continuous experiment, when applied to one- or two-stage anaerobic digestion of sewage sludge (4.3% TS). The ATT was performed at 170°C and pH 5 for 1 hour (sulfuric acid for lowering pH). The one-stage process was mesophilic at 20 days hydraulic retention time (HRT), and incorporated the ATT as pre-treatment. The ...
-
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. ...
-
C8E – large-scale sludge dewatering and thickening processes
A key component of the treatment process for drinking water and wastewater is the efficient separation and dewatering of fine-grained sludge, using mechanical means whenever possible. In particular, large wastewater treatment plants serving a population of 200,000 or more must find the most economical, optimal solution for the dewatering and thickening process. Given this imperative, reliability, ...
By Flottweg SE
-
Waste Water Treatment Facility in Italy Greatly Reduces Volume with Pyrobustor®
The ARA Pustertal wastewater treatment facility treats residential waste water from an association of 14 municipalities with a collection area of 444 square miles, corresponding to a population of approximately 400,000. A thermal dryer reduced the volume and weight of approximately 16,000 tons/year of sewage sludge containing 20-25% dry matter. The sludge volume was reduced about 75% by drying. ...
-
Sustainable odour control in urban environments
Abstract With an ever increasing focus on sustainability, the municipal recycling sector is increasingly locating recycling facilities in urban environments to be closer to their waste sources. The odour control industry needs to respond in providing ever more efficient odour extraction technologies to minimise any odour nuisance to their residential community neighbours. In addition, cost ...
-
Activated Sludge Types for Sewage & Water Treatment
Activated Sludge Types for Sewage & Water TreatmentIn the Activated Sludge Process for waste water treatment, microorganisms, including bacteria, fungi, and protozoa, are used to speed up the decomposition of organic matter requiring oxygen for treatment.The Activated Sludge name and meaning originates from the process it involves: the production of an activated mass of microorganisms capable ...
By YASA ET
-
Phosphorus from Sewage Sludge Ashes - Case Study
Phosphorus recovery from phosphorus-rich asses of SNB and HVC Sewage water in the Netherlands contains approximately 12 million kg of phosphorus of which 85% ends up in sewage sludge. When sewage sludge is burned in a mono-sludge combustor, such as at HVC and SNB, most of the phosphorus ends up in the fly ash. Fly ash contains up to 27% phosphorus. EcoPhos, in cooperation with SNB and HVC, ...
-
The role of SSVF and SSHF beds in concentrated wastewater treatment, design recommendation
The return flows of reject water from sewage sludge dewatering alter the activated sludge process in a conventional WWTP and increase TN concentration in the final effluent from WWTP. The objective of the investigation carried out was to consider the application of multistage treatment wetland (MTW) for the treatment of reject water from sewage sludge dewatering in a centrifuge (RWC). This paper ...
-
Pharmaceuticals in processing of municipal sewage sludge studied by grab and passive sampling
Concentrations of pharmaceuticals, consisting of four anti-inflammatory and one antiepileptic drug, were studied in the aqueous and solid phase of municipal sewage sludge, collected from a wastewater treatment plant (WWTP) in central Finland. The samples included untreated municipal sludge from the biological wastewater treatment, digested sludge and sludge before and after composting. First, ...
-
Investigation of the effects of temperature and sludge characteristics on odors and VOC emissions during the drying process of sewage sludge
Sludge drying is a necessary step for sludge disposal. In this study, sludge was collected from two wastewater treatment plants, and dried at different temperatures in the laboratory. The emission of odor and total volatile organic compounds (TVOCs) during the sludge drying process were determined by an online odor monitoring system. The volatile organic compounds (VOCs) in off-gas were ...
-
What Is the Sludge Treatment Process?
Raw, untreated sewage is a serious hazard to the environment as well as to the nearby population. However, through proper treatment, wastewater facilities can keep up with demand, reduce pathogenic risks, and reintroduce clean water back into the environment. Learn more about the role of sludge treatment in improving wastewater processing. Sewage Sludge When municipal wastewater treatment ...
-
The sludge dryer can treat all kinds of sludge
Sludge is a collective term for various types of sediments and floating objects produced by different treatment processes in water supply and wastewater treatment. The composition and properties of the sludge mainly depend on the composition, properties and treatment process. According to different classification standards. There are many classification methods for sludge, which are briefly ...
-
4-Step Wastewater Sludge Treatment Process
What is in sewage sludge? Sewage sludge is a byproduct of treated wastewater. It is composed of both organic and inorganic materials, a large concentration of plant nutrients, organic chemicals, as well as pathogens. Therefore, it is extremely important to properly treat such sludge in order to minimize its environmental repercussions. Here is a brief overview of the sludge treatment process to ...
-
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.
-
7 Disadvantages of Using an Activated Sludge Process for Your Municipality or Company
7 Disadvantages of the Activated Sludge Process for Municipalities and Organization Biological treatment processes are an important component in many wastewater treatment systems. They are one of the most efficient and effective ways of reducing organic material in wastewater. There are quite a few of them that have been researched and used over several decades. However, one of the most widely ...
-
Dewatering of Industrial Sludge - Case Study
At Ten Cate Protect, town of Nijverdal, The Netherlands, 2006 During the wastewater treatment process at Ten Cate Protect large quantities of sewage sludge are liberated. A couple of days per week this sludge is transported in tanker trucks to a waste disposal plant. On June 14th 2005 a Geotube MDS unit was put in operation at Ten Cate Protect to separate and condense the sludge of the aerobic ...
-
7 Disadvantages of Implementing an Activated Sludge Process For Your Municipality or Company
Biological treatment processes are an important component in many wastewater treatment systems. They are one of the most efficient and effective ways of reducing organic material in wastewater. There are quite a few of them that have been researched and used over several decades. However, one of the most widely used conventional biological treatment process is the activated sludge process (ASP). ...
-
Silent sentinel role for static gas analyser at United Utilities
Biogas produced by the United Utilities anaerobic digestion sludge plant at Lancaster (Stodday) waste water-treatment runs a brand new 525kW combined heat and power (CHP) engine generating electricity and now operating 24/7. It joins an existing 325kW engine already in service for three years. In addition to biogas from the Stodday mesophilic anaerobic digester, a new enzymic hydrolyser increases ...
-
Wastewater Is An Asset | It contains nutrients, energy and precious metals
People think as little as possible about the wastewater that is produced daily from their showers, bathtubs, sinks, dishwashers and toilets. But with the right techniques, it can become a valuable resource. On average, every Americans uses about 60 gallons of water per day for purposes that include flushing toilets, showering and doing laundry. This figure can easily double if outdoor uses, ...
By YASA ET
Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you