Innovative Water Processing Solutions By Water Quality Management - - PowerPoint PPT Presentation

Innovative Water Processing Solutions By Water Quality Management Professionals

• What is the goal?
• Why are the new benchmarks so

difficult to meet?

• How can these pollutants be

removed?

• What should you keep in mind when

designing a system?

• Have you mapped pollutant sources?
• Is source control in place?
• Are BMPs in place?
• Are BMPs being maintained?
• Can you isolate or eliminate problem outfalls?
• Can you infiltrate or reduce your discharge?
• Are you sampling correctly?
• Do you qualify for any waivers?
• Do you qualify for any grants?

…and still have a problem?

We don’t have room to let nature work it’s magic. We utilize treatment to speed up the process.

Benchmarks You

Dissolved Substances Removed by Sand Filter

In order to find our “needle” – we need to muck through some of the “hay” first.

SCRAP METAL CEMENT PLANT LOG YARD METAL GALVANIZER

Storm Intensity, Volume, and Season Changing Site Conditions

Filtration Absorption Adsorption Gravity

Filtration Absorption Adsorption Gravity

Filtration Absorption Adsorption Gravity

Filtration Absorption Adsorption Gravity

1 gram = ~500m2 surface area One 2000lb Vessel = ~175 square miles of surface area

POND VAULT CATCH BASIN Footprint Algae Pest Control Confined Space Construction Cost Visual Inspection No Storage No Settling Power Cycling

ABSORBENT BOOMS GRAVITY SEPARATION VAULTS OIL COALESCING MEDIA

Liquid 50% Sodium Hydroxide delivered via peristaltic pump

Raise pH Lower pH

Gaseous Carbon Dioxide delivered via bubbler hose Solid Vita-D-Chlor tablets dissolved in flowing steam Liquid 15% Muriatic Acid delivered via peristaltic pump

Liquid 50% Sodium Hydroxide delivered via peristaltic pump

Raise pH Lower pH

Gaseous Carbon Dioxide delivered via bubbler hose Solid Vita-D-Chlor tablets dissolved in flowing steam Liquid 15% Muriatic Acid delivered via peristaltic pump pH can be adjusted manually or by using automated control systems that utilize pH probes and dosing logic

At a pH of 8, up to 8000ppb

• f Zinc will be soluble

At a pH of 10, only 90ppb of Zinc will stay in solution

A stormwater sample with a pH of 8 has 1000ppb of Zinc content By adding a base and shifting the pH to 10, ~910ppb of Zinc will precipitate out as Zn(OH)2 because the Zinc saturation point has been lowered

• Zn(OH)2 is a polar molecule that reacts more readily with other polar molecules

(like itself or coagulants) than solubilized Zn2+

• The Zn(OH)2 itself is still too small to filter, but now with its added electrostatic

strength, it is much more likely to react with other polar molecules or coagulants in solution and agglomerate into larger diameter particles

• The remaining soluble, non-precipitated Zn2+ can still be removed through

physical entrainment within the forming floc and/or through light electrostatic association with polar molecules

• Other multi-metal co-precipitation and formation of metallic oxides are also key

to removing heavy metals and are not impacted by pH adjustment

Chitosan (Cationic BioPolymer) PolyDADMAC (Cationic Polymer) Iron or Aluminum (Cationic Coagulants) Chemical Coagulation – ie Aluminum Sulfate, Ferric Chloride Electrocoagulation – Fe or Al generated through electrolytic oxidation

POLY STEEL UPRIGHT STEEL HORIZONTAL DISSOLVED AIR FLOTATION TUBE SETTLER WEIR PLATE

$ $

UPGRADES

$

Bag Filter Cartridge Filter Media Filter with Automated Backwash Self Cleaning Filter Ultra Filtration Mixed Media Passive Filtration Depending on media, can be a combination of filtration and/or adsorption Inert: Sand, Glass Adsorptive: Alumina Oxide, Zeolite, Carbon

WaterTectonics 6300 Merrill Creek Parkway Suite C-100 Everett, WA 98203 www.watertectonics.com