Advanced Oxidation Processes

Advanced Oxidation Processes (AOPs) are treatment technologies used alone or in combination, whose purpose is oxidizing/degrading residual organic matter in wastewater streams primarily via the hydroxyl radical (•OH). We have several partners with expertise in all the major technology configurations (UV-H2O2, UV-O3, Plasma) and Mosaic has its own line of AOP skids for flows up to 250 gpm depending on the application (constituents of concern, influent levels and effluent targets).

Aeration

Aeration can have a very positive effect on many wastewater characteristics such as BOD levels, H2S levels, TOC levels and more, either by providing a direct oxidative effect on contaminants, or more often to provide additional dissolved oxygen to a biological process that benefits from it. Surface aeration technologies come in the form of surface diffusers, mechanical paddles, jet sprayers and other technologies. Subsurface treatment is typically accomplished through air diffusers that introduce either coarse or fine bubbles into the wastewater. The diffusers vary in design and function and it is important that the equipment providers you work with have an intimate knowledge of what your system requirements for DO are and how best to provide that.

Belt Presses

As with other dewatering filters, belt filters dewater solids by applying pressure via a tensioned porous belt that passes over and under a series of rollers of varying diameters. Increased pressure is created as the belt passes over rollers which decrease in diameter thereby concentrating pressure on successively smaller areas. Many designs of belt filters are available, but all incorporate the following basic features of conditioning zones, gravity drainage zones, and low and high pressure compaction zones.

 

Blowers & Compressors

An adequate supply of clean air is a critical part of all watsewater treatment plants and blowers and compressors are nearly as ubiquitous as pumps at treatment plants. Blower and compressor technology has evolved greatly in the past 10-15 years, with efficiency and robustness improvements that can have tremendous impact on plant performance and operational expenses over time. Mosaic has several partners who can support air supply requirements small and very large.

Centrifuges

A centrifuge is a solid-liquid separator that takes advantage of slurry density differences to achieve removal of suspended material. Particle acceleration through the liquid is achieved by rotating slurries about a fixed axis whereby particles more dense than water remain close to the axis center while water accelerates away from the axis much faster. Suspended solids accumulate near the center of the centrifuge and are compressed via a compaction screw conveyor, which rotates at a different speed than the external part of the centrifuge (bowl). The centrifugal force compacts the solids and expels the surplus liquid. The solids are discharged from the bowl on one end of the centrifuge while the clarified water exits the opposite end.

Chillers

The Atlas Copco TCX series is a compact all-in-one water chiller with an air-cooled condenser and integrated hydro module. The TCX chillers are specially designed for cooling water (or a mixture of water and glycol) for a wide range of industrial processes, including food and beverage, machine cooling, medical, pharmaceutical, plastics, and printing.

Clarifiers

Clarifiers are utilized for solid-liquid separation and take many forms, including those that settle solids

  • Gravity Settler
  • Solids contact
  • Incline Plate
  • Etc.

And those that float solids

  • Dissolved Air Flotation
  • Suspended Air Flotation
  • Etc.

The best choice for clarification in a given application depends on solids density and solids size (particle size distribution), available footprint, budget and project goals.

Containerized Systems

In recent years containerized systems for both drinking water supply and wastewater treatment have become more polished and flexible in design, and more affordable in cost. System manufacturers now offer containerized systems for mining man camps, small/rural communities, golf courses and ski lodges – really anyone looking for a turnkey treatment system that doesn’t require a building for installation, is convenient to own and maintain, and fits within some rather narrow budget ranges. Our partners can provide systems from the very simple like filtration-chlorination for drinking water, to state of the art MBR systems for wastewater BOD and nutrient removal.

Dissolved Air Flotation (DAF)

Dissolved air flotation (DAF) is a water treatment process that separates solids and FOG from wastewaters by first dissolving air in the water or wastewater under pressure, then releasing the dissolved air at atmospheric pressure in the clarification basin. The released air comes out of solution as bubbles near the basin bottom which lift the suspended matter as it floats to the surface of the water. The lifted contaminants collect on the clarified water surface and are usually removed mechanically by a skimming device.

Filter Presses

Dewatering equipment that is appropriately designed and operated is smart investment for plants that haul solid waste. Probably the oldest means of dewatering, filter presses work by separating solids from liquids by pressing slurries between plates whose surface areas are constructed of filter media. Depending on the application, filter presses can be oriented with plates hanging vertically and pressure applied horizontally, or with plates stacked/laying on top of one another horizontally and pressure applied vertically (tower presses).

Filtration

Filtration is simply the separation of solids and liquids in wastewaters by means of passing waters through some kind of media which serves to retain the solids. Media can be as simple as paper or sand, and as advanced as synthetic membranes. The type of media selected depends on a number of factors including solids amount and size, system flow rate and effluent quality requirements. Mosaic can help you select the best filtration approach for your application and connect you with industry leaders to design and supply the right equipment.

Membranes (MF/NF/RO/UF)

Membrane treatment is a process that removes contaminants from water by passing it through polymeric or ceramic barriers that block constituents by molecular size. There are several different types of membranes that are employed based on the contaminants that need to be removed and the desired product water quality. The different types of membranes and their applications are summarized below:

Mixers

Whether to blend chemicals, suspend solids, aerate, disperse heat or anything else, Mosaic has the top-entry/side-entry, inline, surface or submersible mixer required to get the job done. Let us know what you need to accomplish and we’ll get an appropriate recommendation to you along with design support packages directly from our industry-leading mixing partners.

Ozone

Because ozone is a powerful oxidant with very high reaction kinetics, it is an excellent treatment technology for treated water disinfection as well as industrial wastewater treatment. Advantages of ozone over chlorine and peroxide treatment approaches are that ozone generators produce ozone on-site eliminating the need to inventory or handle chemicals on site, and that unused ozone decomposes into oxygen, minimizing overall environmental impact.

pH Adjustment Systems

Packaged pH adjustment systems are designed to handle both acidic and alkaline wastes including continuous flow rinse waters and concentrated dumps via batch treatment. Any acidic or alkaline stream can be safely neutralized and prepared for discharge or additional treatment. Skids come with a complete sensor and controls package and are fully automated.

Pumps

While Mosaic doesn’t specialize in pumps, we recognize that water transport is a critical part of just about every water/wastewater project, and we are partnered with some great pump partners in support of many applications. We support a number of different pump types, including diaphragm pumps, centrifugal pumps, gear pumps, lobe pumps and submersible pumps.

RO-DI Skids

We can supply RO-DI systems capable of producing water for boiler makeup, electronics fabrication, USP pharma production, laboratory use, and any other applications requiring high purity water. Systems are available in a range of configurations including prefiltering via UF or carbon, and polishing via IX resin or electro-DI units. RO-DI systems can be furnished skidded or containerized depending on the application/location, and for any flow rate from a few gpm to several MGD.

Screw Presses

Screw presses accomplish sludge dewatering by conveying the sludge along the inside of a screen-lined cylinder. As a polymer-conditioned sludge flow loads the cylinder compartment of the screw press, a slowly-rotating (~5RPM) Archimedean screw conveys sludge up a ~20° horizontal incline, where filtrate passes by gravity naturally through the screen perforations at the cylinder bottom. The screw applies pressure opposite the forces from the solids compaction, providing additional dewatering, and the dewatered cake falls out the bottom of the press into a hopper. Cake solids vary based on sludge quality and polymer conditioning, but ranges are typically from 10-20%.

Slop Oil/Tank Bottoms

“Tank bottom sludge” refers to the thick, oily sedimentation that accumulates at the bottom of oil storage tanks, oil hauling truck tanks, etc. over extended periods of use. Eventually, in order to ensure the purity of the future products being stored or transported, the tanks need to be cleaned out by spraying with hot water and physically scraping the sludge out into a waste tank. The resulting contents of the waste tank become a waste challenge, and removal of all the water possible is critical to minimize the volume of waste that will be sent to landfill. “Oil”-water separation can have some positive impact, but additional treatment with chemistry and centrifugation can further reduce volume, change hazard classification, and even separate and reclaim crude-quality oil that can be sold back to refiners.

Suspended Air Flotation (SAF)

Suspended Air® Flotation (SAF) is another solid-liquid separation technology that has several applications it is suited particularly well for, including Food & Bev wastewaters. SAF is not limited by changing conditions (e.g. gas solubility, pressure, temperature, etc.) nor the physics that constrain traditional process systems, such as DAF, IAF or IGF. The result is superior flotation clarification in a much smaller footprint and with a much lower energy requirement.

Thickeners

Thickeners are used in many types of wastewater systems to separate liquids and solids at very high rates, improving the % solids of underflow sludge. Marked by very high sidewall depths, solid-liquid separation occurs rapidly, resulting in hydraulics that are up to 20x that of conventional thickeners. Thickeners produce very high throughput per square meter resulting in excellent overflow clarity and underflow density.

UV

Ultraviolet (UV) light can be used both for disinfection purposes as well as for carbon destruction. With disinfection, the UV light penetrates microorganisms and destroys their DNA, removing the reproductive viability of the organisms. The UV energy imparted at 254 nm is utilized for bacteria, viruses, molds and spores disinfection. At 185 nm both ozone and hydroxyl radicals can form, which gives a certain amount of oxidative power and can be utilized to destroy total organic carbon (TOC). With proper design, UV, sometimes in combination with other technologies, can be used effectively in just about any disinfection or advanced oxidation application.

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Contact Us

Curtis Wood

(720) 546-5892

curtis@mosaicwatersystems.com

Will McHale

(303) 656-5498

will@mosaicwatersystems.com