Ballast flocculation and sedimentation water treatment system with simplified sludge recirculation, and process therefor

A technology for sludge return and water treatment equipment, which is applied in the direction of flocculation/sedimentation water/sewage treatment, water/sludge/sewage treatment, sludge treatment, etc., and can solve problems such as expensive, impractical, and material waste

Active Publication Date: 2013-02-20
VEOLIA WATER SOLUTIONS & TECH SUPPORT
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the other hand, these methods require specialized machinery or a large amount of open space to be effective, which are expensive and may not be practical depending on the economics and geography of the groups that need them
[0009] Another common problem with practical water treatment plants is the extraction of grit weights from the sludge produced, which leads to unnecessary waste of material

Method used

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  • Ballast flocculation and sedimentation water treatment system with simplified sludge recirculation, and process therefor
  • Ballast flocculation and sedimentation water treatment system with simplified sludge recirculation, and process therefor
  • Ballast flocculation and sedimentation water treatment system with simplified sludge recirculation, and process therefor

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Embodiment Construction

[0087]Fig. 1 generally shows a water treatment plant 01 with an added sludge return system corresponding to Embodiment 1 of the present invention, which includes three main areas in which water circulates. Water flows from left to right for progressive purification of water from its pollutants. The upstream condensation zone 10 is defined as receiving water by means of a pipe, for example a cuboid-shaped upright container 100, which may be a conventional pipe and is not shown in the figure. A coagulant, preferably a trivalent metal salt, is added to the water flowing in the coagulation zone 10 in order to initiate the formation of aggregates of contaminants in the water. Small pollutant particles suspended in this water are generally negatively charged, and are thus attracted to the trivalent metal salt, which dissolves in the water, leaving three positively charged ions. The rotation of the mixer 12 is allowed by a motor 11 fixed above the coagulation zone, the motor 11 bein...

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Abstract

A process for water treatment, including a combination of methods from the group comprising coagulation, sedimentation, flocculation and ballast flocculation, which is further improved by the addition of a simplified sludge recirculation system. The recirculation system corresponding to this process allows higher sludge density as well as less significant water volume losses by making the sludge accumulating at the bottom of the sedimentation zone go through a hydro cyclone a certain number of times in repeated cycles thus augmenting the solid particles density of the extracted sludge. The system may also be controlled by a suspended solid analyser, a flow meter and/or a timer. The present invention also includes a method of producing specific fluid flow control behaviour with this simplified sludge recirculation system, which furthermore improves the efficiency of the process.

Description

technical field [0001] The present invention relates to a simplified sludge return system that is added to a system for drinking water, or industrial water or waste water treatment, which may include combination of methods in order to increase its efficiency by reducing weight and water loss. The invention also relates to a specific fluid flow characteristic which is possible especially due to the addition of a simplified sludge return system and which further improves the process efficiency. Background technique [0002] Water treatment plants are indispensable for the purification of drinking water, waste water and industrial water where the water has been exposed to contaminants of various sizes and compositions. Accordingly, purification processes attempt to remove those contaminants using appropriately selected methods, which typically rely on the volume of water in large tanks to accommodate the treatment. Depending on flow, some contaminants are dense enough to sink...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C02F1/52C02F11/12C02F11/127
CPCC02F2209/44B01D21/06C02F11/127C02F2209/11C02F1/5209B01D21/01B01D21/2488C02F2209/40B01D21/32B01D21/0006
Inventor L.凯维龙
Owner VEOLIA WATER SOLUTIONS & TECH SUPPORT
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