sludge dewatering Articles
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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 ...
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Effect of synthetic cationic surfactants on dewaterability and settleability of activated sludge
Dimeric cationic surfactants with different lengths of carbon chains were synthesised, and then these surfactants were added to the activated sludge samples to evaluate the dewaterability and settleability. The adsorbability of cationic surfactants on activated sludge was also studied. By comparing the dewatering performances of different cationic surfactants, the effect mechanisms of cationic ...
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Simulation of sludge dewatering on belt filters
A mathematical model for belt filters was developed to determine optimum load rate and belt speed during drainage of flocculated biological sludge. Numerical simulations were performed for belt filters with and without plows, and the model fit experimental data well. Experiments showed that highly compressible cakes were formed during drainage, which was important. Due to cake compression, the ...
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A method for visualising polyelectrolyte distribution after polyelectrolyte conditioning of a biotic sludge
Charge neutralisation is an important mechanism in (polyelectrolyte) conditioning of biotic sludges and required for efficient sludge dewatering. Based on results from streaming potential and zeta potential measurements, it has been suggested that charge neutralisation is more complete on the outside of the sludge flocs than on the inside. This paper discusses the development of a technique for ...
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Juice Producer in France - Case Study
Our Biggest Models Can Dewater Huge Amount of Sludge During Summer Months. After a successful pilot test has been carried out, AMCON successfully installed one of our biggest models, ES-351 in the Juice factory in France. Although they had been using a belt press until then, they were not satisfied with its performance and they were always looking for an alternative solution for their sludge ...
By Amcon Inc.
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Influence of nanoparticles on the polymer-conditioned dewatering of wastewater sludges
The effect of using small-scale, high surface area, nanoparticles to supplement polymer-conditioned wastewater sludge dewatering was investigated. Aerobically digested sludge and waste activated sludge sourced from the Hunter Valley, NSW, Australia, were tested with titanium dioxide nanoparticles. The sludge samples were dosed with the nanoparticles in an attempt to adsorb a component of the ...
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Extracellular polymeric substances and dewaterability of waste activated sludge during anaerobic digestion
Anaerobic digestion of waste activated sludge was conducted to gain insight into the mechanisms underlying change in sludge dewaterability during its anaerobic digestion. Unexpectedly, the results indicated that sludge dewatering properties measured by capillary suction time only deteriorated after 10 days of anaerobic digestion, after which dewaterability recovered and remained stable. The ...
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Hayat Chemical – Case Study
Project Name Hayat Kimya A.§. Wastewater and River Water Treatment Plant Employer Hayat Kimya A.§. Contractor Enta Miihendislik Aritma Taah. San. Ve Tic. Ltd. Sti. Location of the plant TATARSTAN Scope of work Wastewater and River Water Treatment Plant Contract Date 2013 Completion Date 2014 Flowrate of the plant: 2.000 m3/day Inlet Pollution Parameters: COD: 2.000-2.500 mg/ L ...
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Long-term performance of side-stream deammonification in a continuous flow granular-activated sludge process for nitrogen removal from high ammonium wastewater
An innovative granular sludge deammonification system was incorporated into a conventional-activated sludge process. The process incorporated an internal baffle in the bioreactor for continuous separation of granular biomass from flocculent biomass, which allowed for controlling the solids retention time of flocculent sludge. The process was evaluated for ammonium removal from municipal ...
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A new oxic-settling-anaerobic (NOSA®) activated sludge process for minimizing excess sludge in secondary biological treatment plants: a pilot-scale evaluation of the absorption–biodegradation process
This study compared the sludge reduction performance of a new oxic-settling-anaerobic (NOSA) process with that of a conventional adsorption–biodegradation process. A 50 m3/d pilot trial system with two different process configurations was operated for 6 months. The NOSA process functioned effectively in removing both chemical oxygen demand and nitrogen with the efficiencies of 86 and ...
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Municipal: Harestua, Norway
Project Name: Harestua Wastewater Treatment Plant Location: Oppland County, Norway Type of Plant: Municipal - Retrofit Technology Used: Biowater CFAS Biomedia Used: Biowater BWT-X Operational Since: 2011 The Challenge The Harestua STP plant was a traditional Norwegian STP with headworks (screen and sandtrap), primary settling, chemical precipitation of phosphorous and a final clarifier. The ...
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Case Study - The performance of the grease degrading bioproduct greasolux in the wastewater treatment plant of the resort town
Problem One of the Lithuanian resort towns, during the warm period of year, continuously had problems with the fat, oil and grease (FOG) accumulation in the sewer lines and wastewater treatment plant. The highly polluted wastewater directly impacted the treatment plant in the following ways: Increased grease accumulation in sewer lines and lift: stations; Poor sedimentation of the active ...
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Case Study - The performance of the grease degrading bioproduct greasolux in the meat manufacturing factory and municipal WWTP
Problem A municipal waste water treatment plant in one Baltic town continuously had problems with the fat, oil and grease (FOG) accumulation in the sewer lines, lift stations and waste water treatment plant, since the start up of a local meat processing facility. The highly polluted waste water directly impacted the treatment plant in the following ways: Increased grease accumulation in sewer ...
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Celdar Technology - Sludge Dewatering - Case Study
Having developed, during the last 15 years many applications of electrocoagulation (EC) , the objective of this work done in INTECNA’s Group Laboratories is to find an operationally applicable system to increase the dry substance content during the sludge dehydration process of civil and industrial ...
By Intecna srl
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Innovative approach to centrate nitrification accomplishes multiple goals: nitrogen removal and odour control
In 2001, the City of Phoenix, Arizona (USA) committed to the conversion of the existing high-rate anaerobic digestion process at the 8.9 m3/s 91st Avenue Wastewater Treatment Plant (WWTP) to a multi-phase process (acid/methane, mesophilic/thermophilic) to optimise existing digestion capacity and achieve Class A biosolids. The improved solids reduction is anticipated to double the ammonia load in ...
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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 ...
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Synthesis and characterisation of new cationic polyelectrolytes by inverse emulsion polymerisation and their application in activated sludge dewatering
Water soluble hydrophobically associated polyelectrolytes were copolymerised with dimethyl- [2-(2-methyl-acryloyloxy)-ethyl]-alkyl ammonium bromide (alkyl: propyl, hexyl, dodecyl) (DEACn) and acrylamide (AM) in inverse emulsion. Cationic hydrophobically modified polyacrylamides having different molecule weight and cationic degree were obtained by varying the total monomer concentration and ...
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Flocculation prior to the belt filter - France - Case Study
Customer / Type of customer Cazaux sewage treatment plant - wastewater sludge flocculation Cazaux - FRANCE (33) Issue / Need This plant uses a biological treatment process, “extended aeration activated sludge”, followed by a water clarifier. The sludge is treated by a belt filter, which produces a product consisting of 83% water and 17% dry matter. Flocculation is used to ...
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Quantitative and qualitative effects of bioaugmentation on ammonia oxidisers at a two-step WWTP
Large waste water treatment plants (WWTP) often operate nitrification in two different process environments: the cold-dilute sewage is treated in the mainstream nitrification/denitrification system, while the high strength ammonia liquors from sludge dewatering are treated in a separate high temperature reactor (SBR). This study investigates transfer from nitrifier biomass into a two-stage WWTP, ...
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New processes for the improvement of sludge digestion and sludge dewatering
INTRODUCTIONThe examination of numerous sewage sludges from municipal wastewater treatment plants leads to the conclusion that on the one hand dewaterability of these sludges worsens and that on the other hand dewaterability of sludges becomes more and more important due to increasing disposal costs. Especially wastewater treatment plants with inflows from the food processing industry often face ...
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