Dewatering in biological wastewater treatment: A review

Christensen, Morten Lykkegaard; Keiding, Kristian; Nielsen, Per Halkjær; Jørgensen, Mads Koustrup

doi:10.1016/j.watres.2015.04.019

Cited by 261 publications

(71 citation statements)

References 79 publications

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“…High treatment costs, using toxic chemicals, space limitations for equipment installation and generation of additional pollution, have led the researchers to develop membranebased methods for wastewater treatment purposes [32,33]. The membrane pressure driven separation process relies on the pore size of the used membrane for separation of the feed stream components [34].…”

Section: Membrane Treatment Methodsmentioning

confidence: 99%

Produced Water from Oil-Gas Plants: A Short Review on Challenges and Opportunities

Nasiri¹,

Jafari²

2016

Period. Polytech. Chem. Eng.

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The produced water, which could be a complex mixture of different organic and inorganic compounds (mostly salts, minerals and oils) is a major wastewater stream generated during oil and gas production processes. Due to increase oil and gas exploration and production, especially from unconventional resources like shale oil and gas reservoirs, the volume of this effluent production is increasing around the world and its discarding to the environment is one of the global concerns.

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Section: Membrane Treatment Methodsmentioning

confidence: 99%

Produced Water from Oil-Gas Plants: A Short Review on Challenges and Opportunities

Nasiri¹,

Jafari²

2016

Period. Polytech. Chem. Eng.

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“…It is likely caused by the lessened portion of protein in our sludge floc after HT that subsequently resulted in a limited particle refloculation. The limited refloculation hindered interstitial water extraction and more importantly gave rise to the formation of fine particles that could block/blind filter medium during vacuum filtration [2,11].…”

Section: Discussionmentioning

confidence: 99%

“…Vacuum filtration is widely used in lab-scale experiments, since it can simply predict sludge dewaterability [11,13,17]. However, an incomplete dewatering frequently occurred in vacuum filtration due to filter medium blinding (access blocking by the small particles) and cake blinding (void closure by the deformed flocs) [17].…”

Section: Methodsmentioning

confidence: 99%

“…Moreover, related to low applied pressure (around 0.05 MPa), the advantages of using conditioners in reducing the compressibility of sludge may not be able to be demonstrated [17]. In this experimentation, vacuum filtration was employed for specifically examining the dewatering performance of the treated sludge under low- pressure application, which ought to be significantly affected by the extent of particle flocculation [4,11]. Twenty grams of raw or hydrothermally treated sludge was used in our vacuum filtration process.…”

Section: Methodsmentioning

confidence: 99%

“…This bond could then be resulted in particles bridging, compression of colloids double layers, and eventually water stripping from the loosely bond extracellular polymer substances (LB-EPS). The release of bonded water to be free water is beneficial for low-pressure dewatering process [4,11]. Besides, the compression of colloid double layer increases the floc particle density and rigidity, so that the M. Yan and B. Prabowo contributed equally.…”

Section: Introductionmentioning

confidence: 99%

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Effect of inorganic coagulant addition under hydrothermal treatment on the dewatering performance of excess sludge with various dewatering conditions

Yan

Prabowo

et al. 2016

J Mater Cycles Waste Manag

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A study for producing low moisture content sludge cake was performed by adding NaCl, CaCl 2 , Ca(OH) 2 , or FeCl 3 to excess sewage sludge under hydrothermal treatment (HT) and varying dewatering conditions from low to high pressure (0.04-12 MPa). FeCl 3 addition under HT resulted in cakes with significantly lower moisture content than HT cakes, and moreover, than raw sludge cakes, under all dewatering conditions. The addition of CaCl 2 produced similar effects to FeCl 3 addition but at weaker extents. The addition of Ca(OH) 2 produced much weaker effect than the addition of CaCl 2 under the low-pressure dewatering. However, the effects were comparable under the medium-and highpressure dewatering. The effect of NaCl addition was only prominent under the high-pressure dewatering. Comparison on the moisture content of sludge cakes with the treatments of HT, coagulant-added, and their combination showed that synergy between HT and coagulant addition in producing low moisture content sludge cake was evidenced.

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Multifunctional Adsorbent: Oleophobic Latex Sponge for Removing Dyes and Cu²⁺ from Sewage Waste

Qiu

Phule

Wen

et al. 2021

Macro Materials & Eng

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A latex sponge is modified by chitosan, tannic acid, and silane coupling agent KH550 to prepare an oleophobic sponge adsorbent, which can adsorb different kinds of charged dyes and Cu 2+ . The static adsorption capacity of the latex sponge before and after modification to methyl orange (MO) (negative charge), rhodamine B (RB) (neutral), methylene blue (MB) (positive charge), and Cu 2+ under different initial concentration, pH, and reaction temperature are investigated, and simulations of adsorption kinetics and isotherms are performed. The modified latex sponge improves the overall adsorption capacity along with the initial concentration and increases reaction temperature. The adsorption capacity of the adsorbent expands; when the pH is low, it is beneficial to adsorb MO and RB, and when the pH is high, it is favorable for the adsorption of MB and Cu 2+ . Adsorption kinetics and isotherm data show that the isotherm dates of pure latex sponge conform to the Langmuir isotherm model, while the isotherm dates of modified latex sponge conform to the Freundich isotherm model; however both of them are more fitted with the pseudo-second-order adsorption model, and the chemical adsorption is the main one.

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Dewatering in biological wastewater treatment: A review

Cited by 261 publications

References 79 publications

Produced Water from Oil-Gas Plants: A Short Review on Challenges and Opportunities

Produced Water from Oil-Gas Plants: A Short Review on Challenges and Opportunities

Effect of inorganic coagulant addition under hydrothermal treatment on the dewatering performance of excess sludge with various dewatering conditions

Multifunctional Adsorbent: Oleophobic Latex Sponge for Removing Dyes and Cu²⁺ from Sewage Waste

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Dewatering in biological wastewater treatment: A review

Cited by 261 publications

References 79 publications

Produced Water from Oil-Gas Plants: A Short Review on Challenges and Opportunities

Produced Water from Oil-Gas Plants: A Short Review on Challenges and Opportunities

Effect of inorganic coagulant addition under hydrothermal treatment on the dewatering performance of excess sludge with various dewatering conditions

Multifunctional Adsorbent: Oleophobic Latex Sponge for Removing Dyes and Cu2+ from Sewage Waste

Contact Info

Product

Resources

About

Multifunctional Adsorbent: Oleophobic Latex Sponge for Removing Dyes and Cu²⁺ from Sewage Waste