Dewatering Box Offers Low-Cost Disposal Alternative

Dewatering box from AQUA-Zyme Disposal Systems can give municipalities a low-cost alternative.
Dewatering Box Offers Low-Cost Disposal Alternative
AQUA-Zyme Disposal Systems Vice President Justin Atkinson, right, describes the 30-cubic-yard dewatering box using a scale model. Company representatives spoke with hundreds of WWETT Show attendees from the private contractor and municipal sides.

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With biosolids handling costs continuing to rise, municipalities increasingly look to become more efficient. AQUA-Zyme Disposal Systems had plenty of interested attendees at the 2016 Water & Wastewater Equipment, Treatment & Transport (WWETT) Show wanting to learn about its versatile 30-cubic-yard dewatering box.

The unit is designed to dewater municipal biosolids, septage and grease trap waste, generally within 24 hours. Injection of polymer causes the solids to coagulate. Clear effluent drains from the box and can be sent to the wastewater treatment plant. According to Suzetta Bonifay, sales manager, the unit takes no energy to use and can effectively pay for itself in decreased hauling costs.

“It is an alternative to using a press unit,” she says. “It saves a ton of money.”

Volume reduction

The solids collect inside the roll-off dewatering box, which can be picked up and taken to a landfill or compost facility. The unit reduces the volume of solids and can enable the owner to generate revenue by processing waste from outside sources. Solids produced by the unit will pass the paint filter test and contain 18 to 22 percent solids. Units can be either stationary or mobile. They offer a processing rate of up to 450 gpm for single units, and more for multiplex units. Units come with a roll-over tarp system; side, floor and center screens; 1/4-inch floor plate; 7-gauge side plates; four door binder ratchets; eight drain ports; two inlet ports; and long-handle scraper.

“The solids will be taken at most landfills, or can be turned into a compost that can be sold or applied to livestock feed fields and landscaping with the proper permits,” says Bonifay.

Small-plant solution

The box can be filled with 22,000 to 25,000 gallons of wastewater at 1.5 to 2 percent solids in about two hours. After 24 hours, volume can be reduced by up to 80 percent. While AQUA-Zyme has long offered the box to septic system and grease trap pumpers, Bonifay says more municipal operators have seen uses for it in recent years.

“It makes a lot of sense for smaller wastewater treatment plants that still use drying beds, because it can really help speed that process up,” she says. “Municipalities are always looking to cut costs, and we believe this is an easy way to help them do it.”

Bonifay says the company is already working on some innovations to the dewatering box to roll out at the 2017 WWETT Show: “We make a product that has a 15-year life span, which is great for a dewatering product, but we’re looking at some coatings that are more corrosion-resistant. Texas and other coastal states where there is a lot of salt in the air tend to be pretty hard on metal equipment. We’re working on something that’s going to be a great fit for those areas.” 979/245-5656;


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