HORIZONTAL FLOWTYPE AIR FLOTATION AND SEDIMENTATION MACHINE An Efficient Solution for Solid-Liquid Separation of Industrial Wastewater

2026-09-14 13:59:35

u Overcoming the Challenges of Solid-Liquid Separation in Industrial Wastewater Treatment

Against the backdrop of accelerating industrialization, industrial wastewater treatment has become a crucial element of environmental protection and sustainable development. However, many enterprises face severe challenges in actual production: wastewater often contains large amounts of suspended solids, oils, colloids, and other pollutants that are difficult to settle naturally. These substances not only cause turbidity and high color intensity in the water but also severely disrupt the normal operation of subsequent biochemical treatment systems. Traditional single sedimentation tanks or conventional dissolved air flotation (DAF) units often struggle to balance treatment efficiency with operating costs, resulting in unstable effluent quality.

To address this industry pain point, the Horizontal Flow Flotation-Sedimentation Integrated Machine has been introduced. As an advanced wastewater treatment equipment that combines dissolved air flotation and gravity sedimentation, it seamlessly integrates the advantages of both separation processes, serving as an expert solution for the solid-liquid separation of complex industrial effluent. This article provides a comprehensive analysis of the equipment's working principles, structural features, core advantages, and extensive applications, offering an in-depth look at how it empowers enterprises to achieve compliant wastewater discharge and resource recovery.

u What is a Horizontal Flow Flotation-Sedimentation Integrated Machine?

The Horizontal Flow Flotation-Sedimentation Integrated Machine is a highly efficient water treatment equipment. Its core innovation lies in the coupling of two major processes—Dissolved Air Flotation (DAF) and Gravity Sedimentation—within a single tank.

1. Flotation Stage: The dissolved air system generates a massive volume of microbubbles with a diameter of merely 20-50 micrometers. As these microbubbles rise, they collide with and adhere to pollutants in the water, such as suspended solids, colloids, and oils, forming "bubble-particle" complexes. Due to their overall density being lower than that of water, these complexes rapidly float to the surface, forming a sludge (scum) layer.

2. Sedimentation Stage: Heavier impurities that have a higher density and are not easily carried by bubbles naturally settle to the bottom sludge hopper of the equipment under the force of gravity.

The synergistic effect of these two processes enables the equipment to simultaneously handle both light pollutants (e.g., oils and fibers) and heavy pollutants (e.g., sand and metal hydroxides), achieving true all-around, high-efficiency purification.

u Main Structure and Workflow

The design of the Horizontal Flow Flotation-Sedimentation Integrated Machine fully considers fluid dynamics and treatment efficiency. Its core components and workflow are as follows:

u Core Components

1. Microbubble Generator: The "heart" of the Dissolved Air Flotation (DAF) system. It efficiently converts compressed air into a massive volume of tiny, uniform microbubbles, ensuring sufficient contact between the bubbles and pollutants.

2. Mixing & Reaction Zone: Wastewater is thoroughly mixed with flocculants (e.g., PAC, PAM) here. Through mechanical stirring or pipe reactions, fine pollutants aggregate into larger flocs, creating optimal conditions for subsequent separation.

3. Flotation Zone: Microbubbles bind with the flocs and float to the surface. A chain-type or traveling-bridge skimmer at the top operates continuously, smoothly scraping the scum into the discharge trough.

4. Sedimentation Zone: This section typically utilizes inclined tube or inclined plate packing technology to significantly increase the effective settling area and shorten the settling distance. The bottom sludge hopper is designed with an optimal slope to ensure sludge automatically slides into the discharge pipe, preventing accumulation.

5. Electrical Control System: Equipped with a PLC intelligent control cabinet, it can automatically adjust key parameters such as dissolved air pressure, skimming frequency, and sludge discharge cycles, enabling unattended operation.

u Workflow

Wastewater first enters the pretreatment zone, where it mixes and reacts with flocculants to form flocs. It then flows into the flotation zone, where microbubbles attach to the flocs and float them to the surface for continuous collection by the skimmer. Heavier particles not carried by the bubbles enter the sedimentation zone, where they are further separated using the inclined tube packing. Finally, the clarified treated water is discharged over the effluent weir, while the bottom sludge is periodically discharged for subsequent disposal.

u Core Advantages

1. High Efficiency: SS >95%, oil >90%, clear effluent.

2. Compact Design: All-in-one, saves space & civil cost.

3. Low Energy: Only 1/8 of conventional units.

4. Smart Operation: PLC auto-control, 24/7 unattended.

5. Shock Resistant: Handles fluctuating quality & volume.

6. Easy Maintenance: Modular, quick repair, low cost.

u Conclusion

With its dual purification mechanism of "flotation + sedimentation," highly stable treatment performance, and the advantages of low energy consumption and easy maintenance, the Horizontal Flow Flotation-Sedimentation Integrated Unit has become an indispensable solid-liquid separation tool in the industrial wastewater treatment industry.

In an era of increasingly stringent environmental regulations and an urgent demand for cost reduction and efficiency improvement, choosing high-quality wastewater treatment equipment is not only a regulatory necessity but also a long-term investment in a company's green development.

As a leading manufacturer of waste treatment equipment in China, ZKBetter is always committed to providing customers with premium environmental protection equipment and solutions. If you are facing challenges in wastewater treatment or looking to upgrade your existing processes, please feel free to contact us. Our professional engineers will provide free on-site inspections and customized design solutions based on your specific needs, helping you easily achieve discharge compliance and resource recovery