www.watchwater.de

Page

1

We make a difference.

is dynamic, powerful, energetic and a continuous filtration process method used to manufacture clean and fresh water without any interruption or backwash and rinse. The word continuous means operating 24 hours a day, 7 days a week and can operate for more than one or two years without a shut down. Shutting down and backwashing, rinsing, processes results in

high amount of waste water and unwanted chemical demand. is a process which is based on Fluidization. In this process water is passed upflow through the Katalox Light media.

NEXT REVOLUTION

Wash box

Media washer

Filtrate

Water Distributor

Air Lift Pump

BackwashWaste

Feed

Deareationpipe

Filtrate Effluent

H I G H F L O W&

N O B A C K W A S H

CHEMISTRY, WATER CHALLENGES AND

SOLUTIONS

“A KATALOX-PROCESS DISCOVERED BY WATCH-WATER TO CLEAN WATER AND

REMOVE IRON, MANGANESE AND HYDROGEN SULFIDE FROM WATER

MORE EFFICIENTLY”

INTRODUCTION

Continuous filters - proven technology with the latest innovations

www.watchwater.de

Page

2

We make a difference.

The is an up-flow, moving bedfilter that is constructed with highlyadvanced media depths for differentapplications and configurations. Rawwater enters near the top and is led to thebottom of the tank by means of a waterdistributor. Iron, Manganese, Hydrogensulfide, Arsenic and other heavy metalsare filtered out as the raw water flows upthrough the media bed. As the waterreaches the top of the filter, it passes overthe effluent weir as filtrate and isdischarged. A small portion of the filtrateis diverted through the media washer andused for cleaning and transferring thewaste solids.

The filter employs abackwash rinse that is performedcontinually while the tank is processingwater. An air lift pump, located at thecentre of the module draws the mediafrom the bottom of the filter up into thewash box. As the media is released intothe wash box, it falls into the mediawasher where the filtered solids areseparated from the Katalox Light. Fromthere, the filtrate carries the solids out aswaste (backwash). The washed KataloxLight falls down onto the media bed forcontinued use.

Each air lift pump is adjusted andregulated by the pneumatic cabinetsupplied with the installation.

PROVEN PROCESS

The amount of wash water used can besignificantly reduced by running the KataloxLight pump intermittently. This is achieved bythe use of an optional wash water valve, anda solenoid in the pneumatic cabinet. This isespecially valuable in ground watertreatment, but has proven equally effectivealso in other applications such as in wastewater applications, e.g. tertiary treatment.When running the Katalox Light pump incycles the energy cost is also reduced due tothe decrease of the air consumption, andletting the Katalox Light bed restintermittently can result in a higher qualityfiltrate.

Wash water and energy reduction

Continuous filters – proven technology with the latest innovations

NEXT REVOLUTION

www.watchwater.de

Page

3

We make a difference.

process design and applications

is used to solve purificationproblems in drinking water treatment,industrial water supply, recovery and reuseof water and treatment of wastewaterbefore discharge. Customers are publicutilities, pulp and paper industry, iron andsteel industry, chemical process industry,pharmaceutical industry, mining andmineral industry, food industry, powerplants, incineration plants, metal finishingand electroplating industry and others whouse and process water.

Continuous Contact Filtration isused to produce process water anddrinking water from river or lake water andfor certain wastewater applications. Theflocculation chemicals are mixed into the

feed stream of the (s).The first part of the filter bed providesexcellent conditions for fast floc formationand serves as flocculation reactor. Noflocculation tanks are required. Presetting

can be eliminated because of ’sability to handle high concentrations ofsolids.

Process Water Recycling reduceswater consumption and permits fullcontrol of the water quality. Afterscreening or primary settling, spent

process water is pumped to the

. The filtered water is recycled.Wash water is flocculated and thickened.The overflow from the thickener goes backto the filters.

Treatment of Metal-Bearing IndustrialEffluents includes precipitation of themetallic ions, followed by flocculation,sedimentation, and final filtration in a

. The process produceslow residual metal contents and meets strictenvironmental standards.

Tertiary Filtration is used for final treatmentof wastewater before discharge. Contactfiltration with aluminum or iron salts asflocculation agents may be employed, asrequired, to precipitate phosphorous andenhance suspended solids removal. The endproduct meets the highest environmentalstandards applicable to municipalwastewaters and industrial effluents. Thefinal filtration process can be combined withbiological denitrification. Nitrates areconverted to nitrogen gas by a thin film ofactive bacteria on the filter granules.

NEXT REVOLUTION

In most applications the filter mediais by Watch Water manufactured highlyadvanced Katalox Light.Normally the KataloxLight in the filter doesnot need replacing,but a small amount ofrefill may be neededon a yearly basis (abt.0.3% of the volume).Particular material isused in bio activatedfilters.Carbon is a specialversion with catalyticcarbon as media.

www.watchwater.de

We make a difference.

... examples of Industrial Applications▪ Metal finishing▪ Backwash water recovery▪ Process water▪ Cooling tower blowdown/side stream

filtration▪ Steel mill scale▪ Chemical processing▪ Ideal for pretreatment in lieu of gravity

filters

... improves the process▪ No first filtrate – always clean effluent

of a high quality▪ High suspended solids, gases, metals /

heavy metals without need for pre-treatment

▪ No shock loads on the wash watertreatment system

▪ Low head loss▪ Low energy consumption▪ Low supervision and maintenance costs▪ No interruption of the operation for

backwashing▪ Small footprint

Advantages -

The requirements for water treatment arebeing increasingly regulated by new laws andregulations. This means that more powerfuland efficient equipment is needed. The

by Watch Water providean economic and energy saving method.

The continuous contact filter canbe applied in both municipal wastewater andindustrial water treatment processes.Whether you need reuse of quality water,nutrient removal, industrial water treatment,

or raw water treatment, by WatchWater opens up for new process solutionsand delivers unparalleled effluent quality,meeting the highest of environmentalstandards:

... simplifies the system▪ No need for backwash pumps▪ No wash water storage tanks▪ No wash water collecting tanks▪ No need for backwash automation▪ No air scour blower▪ No clogging filter bottom nozzles▪ Single media filter bed▪ The system is easy to construct and

easy to maintain▪ Easy retrofitting for biological

treatment

Page

4

PROCESS APPLICATIONS

▪ Removal of Iron, Manganese,Hydrogen sulfide, Arsenic and otherheavy metals

▪ Suspended solids reduction▪ Two stage Continuous Contact

Filtration▪ Nitrogen removal (denitrification

and nitrification)▪ Phosphorous removal▪ BOD/CO D removal▪ Activated Carbon treatment▪ Treatment of metal-bearing

effluents▪ Pretreatment to other processes

NEXT REVOLUTION

www.watchwater.de

We make a difference.

Page

5

Contact us for information:

Watch-Water® GmbHFahrlachstraße 1468165 Mannheim, GermanyTel. +49 621 87951-0Fax +49 621 87951-99info@watchwater.de

NEXT REVOLUTION

Katalox Light specificationsKATALOX LIGHT ® is a new brand ofrevolutionary advanced filtration mediacompletely developed in Germany. It‘scomposition simply makes it outstanding againstthe contemporary filter media available in watertreatment industries, like sand, BIRM, GreensandPlus, Manganese Greensand etc. KATALOX LIGHT® is manufactured in Germany.

KATALOX LIGHT ® is engineered with uniqueMnO2 coating technique on ZEOSORB®,providing it light weight, higher filtration surface,more service life and more reliable performance(filtration down to 3 µm) than any other existinggranular filter media.

KATALOX LIGHT ® is being used in numeroussystem for residential, commercial, industrialand municipal applications worldwide, for Highlevel filtration, color and odor removal, Iron,Manganese, Hydrogen sulfide removal, efficientreduction of Arsenic, Zinc, Copper, Lead, Radium,Uranium and other radionuclides and heavymetals.

KATALOX LIGHT ® is WQA Certified to meet ANSI/NSF 61 standard for drinking water applications and has met the ANSI/ NSF 372 Lead free compliance.

Advanced useHigh concentration coating of MnO2 on theKATALOX LIGHT ® surface (10%) is the biggestadvantage compared to any similar productavailable in the market. This makes the oxidationand co-precipitation of contaminants much moreeffective. For removal of very high concentration ofcontaminant it‘s recommended to use H2O2 as anoxidizer, which provides accelerated catalyticoxidation on the surface of the media. Conventionaloxidizing agents like chlorine or potassiumpermanganate also could be used if required.

KATALOX LIGHT ® can be used for Arsenic,Radium, Uranium removal but in these casesthere is requirement of Iron in the water.KATALOX LIGHT ® system is designed withspecial iron dosing technology which hasmany advantages over Adsorbent mediaused for Heavy Metal removal.

The FutureThe future of water treatment, as we see

it, is going to give us more difficultchallenges and we all need moreadvanced and robust products.

In Watch Water®‘s vision, KATALOXLIGHT ® can be addressed for advancedconcepts like Water Reuse, ControlledAdsorption of Arsenic and Heavy Metals,advanced Membrane pre-treatment,Zero-Discharge Cooling tower etc.

Physical Properties

Appearance Granular black beads

Odor none

Mesh size USSI

14 x 30 0.6 – 1.4 mm

Uniformity Coefficient ≤ 1.75

Bulk densityUSSI

66 lb. / ft³ 1060 kg / m³

Moisture Content < 0.5 % as shipped

Filtration < 3 micron

For more information please check our KATALOX LIGHT ® homepage and brochure.