The
current system for treating wastewater in most cities has not changed
significantly since its creation by British engineers in the 19th
century.
EOT's
advanced oxidation process could provide a total kill of bacteria,
viruses, parasites, and other pathogens rather than merely reducing
their levels. It may also oxidize almost all organic chemicals normally
found in wastewater; such as solvents, petroleum products, pesticides,
herbicides, and cresols converting them to carbon dioxide and water.
The EOT system contains no chemicals and it can virtually eliminate
bacteria and other pathogens and oxidize many organic chemicals normally
found in wastewater. Unlike other agents such as chlorine, oxidation
with ozone leaves no toxic residues that have to be removed and disposed
of because the process only yields carbon dioxide, water, and in some
cases harmless salts.
The
EOT AOX 1000 consists of four modules.
1. Ozone Generation
Three
Ozonia CF5® ozone generators are housed on-site. Each generator
produces 87 lbs of ozone per day for a total of 261 lbs per day. Ozone
is produced by means of Dielectric Barrier Discharge or so called
Silent Electrical Discharge. The ozone generators are fed dry oxygen
from an oxygen source which is passed through a gap formed by a high
voltage electrode and an earth electrode. When high voltage at high
frequency is applied to the high voltage electrode, ozone is produced
in the feed gas by the microdischarges taking place in the discharge
gap.
The
ozone generators are divided into two compartments:
The
Mechanical Compartment
Contains
the permanently sealed ozone generator module(s) proper, the associated
manifolds, pipework, fittings, valves, connections, and relevant instrumentation
for the safe working of the unit.
The Electrical Compartment
The
electrical equipment is contained in a second compartment in the cubicle
that completely separates and protects these components.
2. Ozone Injection
Influent
water entering the EOT system begins its path to purification in the
injector module. Micro-bubbles of ozone are injected into the flow
in a high pressure environment.
3. Retention
The
ozone saturated wastewater is swirled for 10 minutes in each of two
stainless steel retention tanks. These tanks are equipped with patented
Chemineer stationary tabs to ensure even mixing of the influent.
4. UV Treatment
The
water is then separated into two 500-GPM streams. One stream goes
into a specially-designed low-pressure UV light system; the other
stream into a medium pressure, high intensity UV system. The use of
the two UV systems is for comparison purposes only. Once it has been
determine which system is more suited for optimum disinfection and
organic chemicals oxidation, a final system will be designed.
Technical
Description for System A - Low Pressure UV System The UV Units electrical
specifications are 120VAC/60Hz at 15 Amps. There are 2 each stainless
steel chambers with 6" inlets and outlets with 20 each 64-Watt UV
lamp in each chamber. Each chamber has an automatic pneumatic quartz
wiper system.
Technical Description for System B - Medium Pressure
High Intensity UV System UV System, MP480808-4-LTOC medium pressure,
500 US-GPM maximum disinfection flow rate at 35% UV transmission,
with EOL>30,000 micro watt/second/cm2 in 1cm cell, uses
four 4.8kW medium pressure UV lamps rated at 4,000 hours EOL, integrated
variable output UV controller, mirror polish 315L SS reactor, 150PSI
rated, 8" inlet/outlet ANSI flanges, epoxy coated mild steel control
cabinet, designed to NEMA 12 with lockable door, includes built-in
UV monitor with optical sensor provided 4-20mA output signal, built-in
automatic quartz tube wiping system with adjustable interval, automatic
high temperature shut-down with alarm, running time meter, lamp status
display, Volt and Ampere meters, 480V, 3-phase, 60Hz, 22.4kW with
169 Amp fuse (F 0000817).
The
synergistic action of the ozone/UV combination provides a unique system
for breaking down organic chemicals without adding additional chemicals
to the environment. When this disinfection process is complete, the
effluent water will have relatively low concentrations of organic
toxins and pollutants.
The
EOT AOX 1000 is the first commercial-sized unit of its kind, capable
of servicing municipalities of 10,000-15,000 people. The new generation
of ozone systems is both efficient in terms of ozone yield and economical
to operate.
