sludge concentration Articles
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Design of high efficiency sludge thickening tank
Considering the increasingly high environmental requirements of the wastewater treatment plant, attention should be paid to the secondary pollution control of the concentration tank when designing the concentration tank. The sludge thickener tanks generally emit odor, and new sewage plants should consider taking deodorant or deodorization measures. The rational design and operation of a ...
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Submersible microbial fuel cell for electricity production from sewage sludge
A submersible microbial fuel cell (SMFC) was utilized to treat sewage sludge and simultaneously generate electricity. Stable power generation (145 ± 5 mW/m2, 470 Ω) was produced continuously from raw sewage sludge for 5.5 days. The maximum power density reached 190 ± 5 mW/m2. The corresponding total chemical oxygen demand (TCOD) removal efficiency was 78.1 ± 0.2% with initial TCOD of 49.7 g/L. ...
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Principles of an enhanced MBR-process with mechanical cleaning
Up to date, different physical and chemical cleaning protocols are necessary to limit membrane fouling in membrane bioreactors. This paper deals with a mechanical cleaning process, which aims at the avoidance of hypochlorite and other critical chemicals in MBR with submerged flat sheet modules. The process basically consists of the addition of plastic particles into the loop circulation within ...
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Research on the microbial characters of mixture in an integrated A/O membrane bioreactor
An integrated anaerobe/aerobic membrane bioreactor (A/O MBR) was built and used to treat urban sewage water. The characters of mixture was researched and analyzed. Because the concentration of active sludge in MBR is high, the load of the sludge during the function is really low. When the active sludge functioned under low load condition, because of the low concentration of nutrition the ...
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Hydroman™ THY300 Dirillo Reservoir Hydraulic Dredging Pump
Hydroman™ THY300 Dirillo Reservoir Hydraulic Dredging Pump is kind of electrical and mechanical hydraulic submersible sand suction pump. Hydraulic slurry pump is equipped with two or three agitators to mix the precipitated sludge at high concentrations. Hydraulic slurry pump is suitable for conveying the liquid containing solid particles such as sand or coal cinder. This hydraulic slurry ...
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Evaluation of sludge properties in a pilot-scale UASB reactor for sewage treatment in a temperate region
In this study, continuous operation of a pilot-scale upflow anaerobic sludge blanket (UASB) reactor for sewage treatment was conducted for 630 days to investigate the physical and microbial characteristics of the retained sludge. The UASB reactor with a working volume of 20.2 m3 was operated at ambient temperature (16–29 °C) and seeded with digested sludge. After 180 days of operation, when the ...
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The behaviour of phosphorus and heavy metals in sewage sludge ashes
The effect of the combustion atmosphere and the additives (CaO and HCl) on the behaviour of phosphorus and heavy metals during sewage sludge combustion was investigated. The results demonstrated that the reduction combustion promoted the vapourisation of phosphorus and heavy metals during sewage sludge combustion. Moreover, the concentrations of phosphorus and heavy metals in the bottom ash ...
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How to treatment the sludge wastewater of printing and dyeing
The printing and dyeing industry consumes more water, and the water pollution in the printing and dyeing industry is also very serious. At the same time, the treatment of printing and dyeing wastewater is also particularly important. The printing and dyeing industry is a typical high-water-consuming industry that consumes nearly 100 million tons of softened water for process use every year.The ...
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Frequently Asked Questions and Troubleshooting in Activated Sludge Process (Part 2)
Q: I ran into a problem. In the past few days, we found that the sludge was floating in lumps in the secondary sedimentation tank, which was very loose. It may be due to swelling of the sludge, which is not serious. But I am very surprised that the MLVSS of the biochemical tank is about 2000mg/l, the sludge age is relatively short, the sludge is not aging, and it is within the control range. The ...
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Case Study | Taicang Nanjiao Sewage Treatment Plant
With the development of science and technology, automation technology has been widely promoted, and more and more automation products have been applied to our life. So what will happen when automation is applied to sewage treatment plants? Accompanied by the patter of light rain, in rows of neat buildings, we arrived at Taicang Nanjiao Sewage Treatment Plant, one of the largest sewage treatment ...
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Partial nitrification of sludge reject water by means of aerobic granulation
Granular sludge formation was performed in a laboratory scale Sequencing Batch Reactor (SBR) fed with supernatant of anaerobic digestion of sewage sludge. This effluent was concentrated progressively in order to enhance biomass capacity without inhibiting it. During the first part of the study, ammonium nitrogen was converted to nitrate, so conventional nitrification took place. When a nitrogen ...
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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, ...
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Direct Dewatering from Oxidation Ditch
Development of proper sanitation or wastewater treatment has been a critical issue in Africa for prevention of almost any types of infectious diseases. Generally, anywhere in the world, the keys for the successful wastewater treatment system is choosing the appropriate solids removal and dewatering technology and achieving the acceptable quality of water for discharge. However, the high ...
By Amcon Inc.
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Factors affecting decay of
Salmonella Birkenhead and coliphage MS2 during mesophilic anaerobic digestion and air drying of sewage sludgeFactors affecting the decay of Salmonella Birkenhead and coliphage, as representatives of bacterial and viral pathogens, respectively, during mesophilic anaerobic digestion (MAD) and air drying treatment of anaerobically digested sewage sludge were investigated. Controlled concentrations of S. Birkenhead were inoculated into non-sterile, autoclaved, γ-irradiated and nutrient-supplemented ...
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Characteristics and Classification of Buried Domestic Sewage Treatment Technology
The buried sewage treatment equipment is a modular high-efficiency biological sewage treatment equipment. It is a sewage biological treatment system with biofilm as the main body of purification. It makes full use of biofilm reactors such as anaerobic biofilter and contact oxidation bed. The characteristics of high biological density, strong pollution resistance, low power consumption, stable ...
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Working Document on Sludge
Untitled Document Introduction Sewage sludge originates from the process of treatment of waste water. Due to the physical-chemical processes involved in the treatment, the sludge tends to concentrate heavy metals and poorly biodegradable trace organic compounds as well as potentially pathogenic organisms – viruses, bacteria etc. – present in waste water. Sludge is, however, ...
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Design of Ventilation and Deodorization System for Sludge Drying Workshop of Underground Sewage Treatment Plant.
With the rapid development of the city, the number of sewage treatment plants and sewage treatment capacity increase simultaneously, leading to a rapid increase in the amount of sludge. In the past, concentrated sludge was only treated to 80% water content by mechanical dehydration before relevant disposal. There are secondary pollution and other problems that seriously affect the sustainable ...
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Design of Ventilation and Deodorization System for Sludge Drying Workshop of Underground Sewage Treatment Plant
With the rapid development of the city, the number of sewage treatment plants and sewage treatment capacity increase simultaneously, leading to a rapid increase in the amount of sludge. In the past, concentrated sludge was only treated to 80% water content by mechanical dehydration before relevant disposal. There are secondary pollution and other problems that seriously affect the sustainable ...
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Frequently Asked Questions and Troubleshooting in Activated Sludge Process (Part1)
Q: In the ordinary activated sludge process, sludge expansion will occur during the treatment of municipal sewage, with SVI>400, so it is planned to install an anaerobic selector at the front part of the aeration tank. Since there is little experience in this area, I want to find out if there is anything wrong with setting the selector larger? Now we set the anaerobic selector to account for ...
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Heavy metal & hydrocarbon contaminated sludge
Solidification of Heavy Metal & Hydrocarbon Contaminated Sewage Sludge Client: North Lanarkshire Council Project Managers: Jacobs Challenge: The former sewage treatment works were decommissioned in the 1970’s. It is thought that during the closure process, demolition material originating from the site’s operational buildings was placed into five digester tanks in an attempt to ...
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