biological and ballasetd flocculation treatment of wastewater google patents

US20110147304A1 - Biological and Ballasetd - Google Patents

A method for treating wastewater comprises biologically treating the wastewater in a fixed-biomass biological reactor and then treating the wastewater in a ballasted flocculation system. The...

Description FIELD OF THE INVENTION The present invention relates to a wastewater treatment process involving both a biological treatment process and a ballasted flocculation process....

Abstract. A method and apparatus for treating wastewater is described herein. The present invention combines an electro-coagulation process with a ballasted flocculation process to treat...

A method for treating wastewater comprises biologically treating the wastewater in a fixed-biomass biological reactor and then treating the wastewater in a ballasted flocculation system. The ballasted flocculation system produces a clarified effluent and sludge containing inert granular material having biomass accumulated thereon and suspended

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US9505638B2 - Water treatment process and - Google Patents

A method for treating wastewater using a ballasted flocculation technique includes continuously measuring the concentration of suspended solids, organic matter or other impurities in the water to...

A method and system for treating water or wastewater (50) to remove both soluble BOD and suspended solids. The method entails directing first and second water or wastewater streams to a treatment...

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US6919031B2 - Method of treating water and - Google Patents

The present invention is directed to a method and apparatus for the treatment of water and wastewater. In one embodiment, a method of treating water according to the present invention includes mixing sludge and precipitant with the water to be treated, mixing ballast with the water, and separating the water into treated water and sludge.

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US7311841B2 - Method for treating water by - Google Patents

The invention concerns a water treatment method which consists in introducing coagulated water in a flocculation zone, to enable flocculation of microflocs in the presence and around a ballast; introducing the mixture in a decantation zone; separating the treated water in overflow and a mixture of sludge and the ballast in underflow; conveying at least part of said mixture to a sludge/ballast

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(19) United States (12) Patent Application Publication (10

0002. The invention relates to wastewater treatment in a biological reactor followed by clarification in a ballasted flocculation system. The invention involves cleaning the bal last used in the ballasted flocculation system. BACKGROUND 0003 Wastewater containing both dissolved and sus pended Solids often requires both biological treatment and

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US Patent for Water treatment process and plant using

A method for treating wastewater using a ballasted flocculation technique includes continuously measuring the concentration of suspended solids, organic matter or other impurities in the water to be treated prior to directing the water to be treated to a flocculation tank.

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Wastewater treatment using plant-derived bioflocculants

Coagulation–flocculation technology is commonly used in wastewater treatment to remove cell debris, colloids, and contaminants in a comfortable and effective manner. Flocculants, both organic and inorganic, have long been used in wastewater treatment.

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Understanding and optimization of the flocculation - PubMed

PMID: 30015131 DOI: 10.1016/j.chemosphere.2018.07.021 Abstract In the operation of biological wastewater treatment processes, fast sludge settling during liquid-solids disengagement is preferred as it affects effluent quality, treatment efficiency and plant operation economy.

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Application progress of enhanced coagulation in water treatment

The process of ballasted reaction nuclei-enhanced coagulation mainly refers to improving the flocculation stage to strengthen its sedimentation characteristics and optimize the flocculation agent and hydraulic conditions in the flocculation stage to form flocs with good sedimentation performance.17–19 2.1 Technical principle

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Development of softening and ballasted flocculation as a

A method and system for treating water or wastewater to remove both soluble BOD and suspended solids. The method entails directing first and second water or wastewater streams to a treatment system including an activated sludge system and a ballasted flocculation system.

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Wastewater Technology Fact Sheet Ballasted Flocculation - US EPA

United States Environmental Protection Agency DESCRIPTION Ballasted flocculation, also known as high rate clarification, is a physical-chemical treatment process that uses continuously recycled media and a variety of additives to improve the settling properties of suspended solids through improved floe bridging.

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Removal of heavy metal ions from wastewater: a comprehensive

The inventive water treating method and arrangement successively combine at least one step consisting in biological treating at least one part of pollution contained in said waters by a fixed biomass, wherein a bio-cleaned flow logically obtainable at the and of said step, prior to the entry thereof to a next step, contains less than 2 g/l of SS, and at least one stage for carrying out a

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RECENT APPLICATIONS OF COAGULATION, FLOCCULATION AND BALLAST

water by flotation. (Water treatment manual, EPA) Ballasted flocculation in conjunction with chemical coagulation rapidly enhances solid–liquid separation. Ballasted flocculation can remove more than 85% of total suspended solids (TSS), 65% BOD, 80%–90% of phosphorus, and 25%–35% of nitrogen on average.

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Iron and Manganese Removal - American Water Works Association

Traditional treatment methods would have included the use of clarification, oxidation, coagulation, and filtration. Instead, the util-ity was able to use an ultrafiltration (UF) membrane to accomplish the removal of the iron, manganese, and pathogens. No clarification or coag-ulation was needed.

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WASTEWATER TREATMENT USING ACTIVATED SLUDGE AND BALLASTED

CLAIMS. 1. A method of treating wastewater utilizing an activated sludge process and a ballasted flocculation process, comprising: directing a first wastewater stream to an activated sludge system having at least one reactor and a clarifier; returning activated sludge from the clarifier to the reactor and mixing the activated sludge with the first wastewater stream to form mixed liquor, and

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Liquid Stream Fundamentals: Sedimentation

Generally, clarifiers in a wastewater treatment plant are designed to serve four main functions discussed below. of clarifier surface area and is theoretically the upflow rate ? Flocculation: Clarifiers should promote the aggregation of dispersed particles and prevent floc breakup.

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Pilot-scale microsand-ballasted flocculation of wastewater

PMID: 30015131 DOI: 10.1016/j.chemosphere.2018.07.021 Abstract In the operation of biological wastewater treatment processes, fast sludge settling during liquid-solids disengagement is preferred as it affects effluent quality, treatment efficiency and plant operation economy.

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FRDJXODWLRQDQG IORFFXODWLRQXVLQJELRPDWHULDOV - IOPscience

The present study deals with the determination of physical and chemical parameters in the treatment process of waste water by flocculation and coagulation processes using natural coagulants and assessing their feasibility for water treatment by comparing the performance with each other and with a synthetic coagulant.

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Pilot-scale microsand-ballasted flocculation of wastewater

The present study deals with the determination of physical and chemical parameters in the treatment process of waste water by flocculation and coagulation processes using natural coagulants and assessing their feasibility for water treatment by comparing the performance with each other and with a synthetic coagulant.

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Factors affecting ballasted flocculation reactions - PubMed

Ballasted flocculation involves the addition of a ballasting agent (high-density microsand, sp gr = 2.65) to a chemically stabilized and coagulated suspension of particulate solids. Tests were conducted to determine the effect of eight independent parameters on the settling velocity of the resulting floc.

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Ballasted Flocculation - Water Online

Ballasted flocculation can remove more than 85% of total suspended solids (TSS), 65% BOD, 80%–90% of phosphorus, and 25%–35% of nitrogen on average. It is able to achieve good solids removal at a very high surface overflow rate.

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Ballasted flocculation process and system incorporating an

A1 Abstract: A method and apparatus for treating wastewater is described herein. The present invention combines an electro-coagulation process with a ballasted flocculation process to treat contaminated water or wastewater.

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WASTEWATER TREATMENT USING ACTIVATED SLUDGE AND BALLASTED

CLAIMS. 1. A method of treating wastewater utilizing an activated sludge process and a ballasted flocculation process, comprising: directing a first wastewater stream to an activated sludge system having at least one reactor and a clarifier; returning activated sludge from the clarifier to the reactor and mixing the activated sludge with the first wastewater stream to form mixed liquor, and

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Treatment of waste water by coagulation and flocculation

The present paper review to explore the use of cactus species in the bio-coagulation process and also it aims about investigation on effectiveness of cactus species Opuntia Ficus Indica as bio-coagulant which involve pH implication in post-treatment. In addition, the cactus had no significant effect on pH of treated water.

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