sludge recycling Articles
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North Shore Sanitary District GlassPack Project Summary
North Shore Sanitary District (NSSD) selected Minergy’s GLASSPACK® system as the technology of choice for sustainable biosolids management at its new Sludge Recycling Facility located in Zion, Ill., U.S.A. NSSD’s Sludge Recycling Facility incorporates Minergy’s GLASSPACK® vitrification technology to harness and use the energy contained in biosolids to create an inert, beneficially reusable glass ...
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Pollutant removal characteristics of a two-influent-line BNR process performing denitrifying phosphorus removal: role of sludge recycling ratios
This paper studied denitrifying phosphorus removal of a novel two-line biological nutrient removal process treating low strength domestic wastewater under different sludge recycling ratios. Mass balance of intracellular compounds including polyhydroxyvalerate, polyhydroxybutyrate and glycogen was investigated together with total nitrogen (TN) and total phosphorus (TP). Results showed that ...
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A total cost minimization control for wastewater treatment process by using extremum seeking control
This paper presents a real-time optimal control scheme based on a total cost index (TCI) by using the so-called extremum seeking control (ESC). The ESC searches the minimum value of a given performance index where the TCI consisting of the operational cost and the effluent quality cost is used as the index. An improved ESC is proposed where a transformed TCI by monotonically increasing ...
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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 ...
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Conservation of iron and lime bearing raw materials by recycling of basic oxygen furnace (BOF) sludge in iron ore sintering
Basic Oxygen Furnace (BOF) sludge is one of the by–products generated during process of steel making. It has very high level of iron oxide and lime content. However, the high moisture content of the BOF sludge (35–40%) is a major obstacle in its recycling. Internal recycling of the BOF sludge, with or without pre–treatment, is an integral feature of integrated steel plants in advanced countries. ...
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Application of recycled sludge to stabilize coagulation process
In conventional treatment of variable quality mountain water, an inability to immediately adjust the coagulant dose to variations in water quality causes overdose or underdose of coagulant in relation to its optimal value. The results of the research showed that the reuse of post-coagulation sludge was an effective method to maintain high and stable coagulation effectiveness under both ...
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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 ...
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The Benefits Of Oil Sludge Recycling Pyrolysis Plant
Oil sludge is actually a major byproduct of the oil production process. It is actually a combination of oil, solid sediment and water that could be highly polluting for the environment additionally it has high recycling value. Put simply, the oil sludge could be recycled to produce useful items that provide lots of value. The technology utilized for converting oil sludge into useful products ...
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Effects of oxidation reduction potential in the bypass micro-aerobic sludge zone on sludge reduction for a modified oxic–settling–anaerobic process
Batch experiments were conducted to determine the effect of oxidation reduction potential (ORP) on sludge reduction in a bypass micro-aerobic sludge reduction system. The system was composed of a modified oxic–settling–anaerobic process with a sludge holding tank in the sludge recycle loop. The ORPs in the micro-aerobic tanks were set at approximately +350, −90, ...
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Marsh Industries selects Warden Biomedia for Uni:Gem 75pe With Polylok 525 filtration - Case Study
Overstone Country Park is situated in 160 acres of beautiful Northamptonshire country-side. The park has the River Nene on its borders. Tourists, campers and locals use the extensive natural facilities for fishing, golfing and recreational pursuits. A development of private houses for seventy five people on the private Overstone Park had been threatened with fines and possible prosecution by the ...
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Anaerobic thermophilic digestion of sewage sludge with a thickened sludge recycle
The process of anaerobic thermophilic digestion of municipal wastewater sludge with a recycled part of thickened digested sludge, was studied in semi-continuous laboratory digesters. This modified recycling process resulted in increased solids retention time (SRT) with the same hydraulic retention time (HRT) as compared with traditional digestion without recycling. Increased SRT without ...
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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 undergo ...
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Pilot-scale fluoride-containing wastewater treatment by the ballasted flocculation process
A pilot-scale ballasted flocculation system was used to remove fluoride from one type of industrial wastewater. The system included the formation of calcium fluoride (CaF2) using calcium hydroxide followed by coagulation sedimentation. Calcium fluoride was recycled as nuclei for enhancing CaF2 precipitation and as a ballasting agent for improving fluoride removal and flocculation efficiency. ...
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Wastewater characterisation and performance upgrading of a domestic wastewater treatment plant: the Erzincan case
A detailed characterisation of the incoming wastewater and a performance evaluation were carried out for the domestic wastewater treatment plant of Erzincan City. Conventional characterisation results showed that Erzincan has a medium strength wastewater quality. Structural characterisation of the chemical oxygen demand (COD) indicated that the biodegradable fraction of the total COD was 64.7%. ...
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Decoding the Complexity: Pyrolysis Solutions for Oil Sludge Recycling
Understanding Oil Sludge: A Menace in the Industrial Tapestry Oil sludge, a by-product of various industrial processes, embodies a complex amalgamation of oil, water, and solid residues. Its composition, often laden with heavy metals and hydrocarbons, renders conventional disposal methods inadequate. The urgency lies in deciphering sustainable avenues to manage this industrial menace. ...
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Clean production in stone cutting industries
The stone cutting industry uses high volume of water for cooling purposes and produces large volume of sludge. The disposal of both the wastewater and the sludge to a solid waste disposal site is costly and environmentally unacceptable. Wastewater and sludge from stone cutting industries in Jordan has been characterised and reused in various processes. Stone cutting industries can be modified to ...
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Fate of phosphorus during anaerobic digestion of sludge from an EBPR plant
As part of their ongoing commitment to produce safe sewage sludge for recycling to agricultural land, Anglian Water are expanding their enhanced sludge treatment operations at four key sites across the Eastern region. The project at Whitlingham STW uses thermal hydrolysis as a pre-treatment to anaerobic digestion as the main sludge treatment process. As well as producing an enhanced treated ...
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Long-term effects of the ozonation of the sludge recycling stream on excess sludge reduction and biomass activity at full-scale
This paper presents a full-scale experience of sludge minimization by means of short contact time ozonation in a wastewater treatment plant (WWTP) mainly fed on textile wastewater. The WWTP performance over a 3-year operational data series was analysed and compared with a two-year operation with sludge ozonation. Lab-scale respirometric tests were also performed to characterize biomass activity ...
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A simple empirical model for the clarification-thickening process in wastewater treatment plants
In wastewater treatment plants (WWTPs), activated sludge is thickened in secondary settling tanks and recycled into the biological reactor to maintain enough biomass for wastewater treatment. Accurately estimating the activated sludge concentration in the lower portion of the secondary clarifiers is of great importance for evaluating and controlling the sludge recycled ratio, ensuring smooth ...
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Municipal: Wickford, USA
The Challenge The existing wastewater treatment system at the North Cove development in Wickford, RI could not nitrify and denitrify in winter conditions. The system also had difficulty maintaining nitrification with warmer wastewater temperatures. The existing system consists of numerous septic tanks that receive wastewater (black and gray water) from residential buildings, discharging to a ...
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