Dfferent Treatment Methods

8/8/2019 Dfferent Treatment Methods

http://slidepdf.com/reader/full/dfferent-treatment-methods 1/6

1

EFFLUENT TREATMENT METHODS

Clarification

Clarification consists in removing all kind of particles, sediments, oil, natural organic matter anc

colour from the water to make it clear.

A clarification step is the first part of conventional treatment for waste and surface water treatment.

It usually consist in:

- Screening

- Physical chemical treatment is a generic term for Coagulation-

Flocculation - Sedimentation or Flotation, upon particles properties and water type

- Fine filtration

For industrial effluents, Centrifugation is applied for heavy particlesremoval

Sludge Treatment

Biological/chemical waste water treatment reduces the solved and

unresolved pollutants existing in the waste water. These are to be regained in

the sewage sludge at the end of the water treatment.

The sludge treatment is necessary to reduce and to amliorate the sludges,

which are produced within the biological wastewater treatment.

y General

Biological Treatment



2


Biological treatment of waste water and (domestic) sewage water is used to

lower the organic load of soluted organic compounds. There are t wo main

catagories:

y Aerobic treatmenty Anaerobic treatment

The organic load is defined by the BiologicalOxygen Demand (BOD).

In aerobic systems the water is aerated with

compressed air (in some cases oxygen).Anaerobic systems run under oxygen free

conditions.

Drum filter



3


Description Rotating Drum Series RMS ®

R evolving drum is a machine intended for the

filtration or screening of liquids in general, with

punctured passes from 0,10 a 3 mm in standard performances, in order to achieve a solid- liquidseparation.

It is a self cleaning device, able to work during long

periods without needing attention.

Common applications:

- Beverages industries, distilleries, wine cellars, breweries, citric factories, malt factories.

- Food: cheese factories, dairies, preserves, sugar beet.- Slaughter houses: pigs, cows, birds.

- Waste waters: treatment plants in different processes, income water as well as sludge treatment.

- Used and industrial waters treatment.- Waste waters: wells, mining, carbon cleaning.

- Screening of: chemical products, salts, plastic,grains, water of paper industry, fibers.

- R ecycling operations: waste waters of paints, oilsand dissolvent clean up, dying factories.

- Various: fish and meat elaboration, brine factories,

furs, etc.

General Characteristics:

Filtrating cylinder.- completely built in stainless steel

of Aisi 304 or 316 quality, this cylinder is built withspecial machinery, by helicoidall wrapping of a

triangular section profile over an assembly of support bars that follow the generative lines of the cylinder.

All and each of the cross points between the helicoidalwrap and the support bars are welded, giving high

rigidity and resistance to the assembly. The separation between spirals (light of pass) of the helicoidal wrap

is regulated during its construction, in order to obtainthe desired light of screen.

Body.- in strong metal welded stainless steel

construction of Aisi 304 or 316 quality, provided withdistribution box of the liquid to filter, income and exit



4


connections, anchorage legs, sealing elements, etc..

Water elimination system.- is achieved by means of

an expelling scraper which constantly scrubs with thefiltrating cylinder, scrapping the wastes attached to

the mesh, which by means of a discharge plate arecollected in an endless container, etc... Built in brass..

R evolving brush.- for loosening of the retained solids

over the filtrating drum. (In special applications).

Powering.- by means of a reducer group of endlessscrew broadly sized, tied by flange over a lateral wall

of the body, minimal Ip-55 standard protection, classF isolation.

Technical data Rotating Drum Series RMS ®

For larger flows disc filtration can be more appropriate. Drumideal for water recycling and as polishing in combination with

water treatment systems

R everse Osmosis Plants

Advanced chemical oxidation processes make use of (chemical) oxidants to reduce COD/BODlevels, and to remove both organic and oxidisable inorganic components. The processes can

completely oxidise organic materials to carbon dioxide and water, although it is often not necessary to operate the processes to this level of treatment

A wide variety of advanced oxidation processes are

available:

y chemical oxidation processes using hydrogen peroxide, ozone, combined ozone & peroxide,

hypochlorite, Fenton's reagent etc.y ultra-violet enhanced oxidation such as

UV/ozone, UV/hydrogen peroxide, UV/air y wet air oxidation and catalytic wet air oxidation

CWAO process



5


(where air is used as the oxidant)

Advanced oxidation processes are particularlyappropriate for effluents containing refractory, toxic or

non-biodegradable materials. The processes offer

several advantages over biological or physical processes, including:

- process operability- unattended operation

- the absence of secondary wastes- the ability to handle fluctuating flow rates and

compositions

However, advanced oxidation processes often have higher capital and operating costs comparedwith biological treatment.

The most suitable variant for each application is chosen on the basis of the chemical properties of

the effluent.

o

Biological Excess Sludge R eduction

Sludge Treatment

There are biological gentle process supports

for activated sludge processes available on themarket. Their application causes quick and

durable saving of costs.

With the bio-available vitamin folic acid instabilized form, the metabolism of the

microorganisms acting in the activated sludgetank can be stimulated. Furthermore it supports

the sensitive balance of the microbiological

species diversification. All this encourages thedevelopment of a healthy, efficient biomassand leads to a significant improvement and

acceleration of activated sludge processes.

Thanks to the presence of concentrated anti-stress factors, i.e. folic acid and other

biological active components, which are



6


identical to those, that are in the cells

themselves, the application results in:

- Significant reduction of biological excesssludge

- Increasing of process stability- Improvement of sludge characteristics due to

the containment of excessive growth of filamentous organisms, which leads to

improved settle ability and easier thickening of the sludge and to savings on chemical

operational supplements.

Dfferent Treatment Methods

Documents

Transcript of Dfferent Treatment Methods