main index

P00: frame around

P01: olicognography

P03: infrastructures

wayout:contact

Registers of application docs

sewage

toxic.indus.

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Similar user docs

ulrichtreatment

residualwaters

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Waste Water Treatment Techniques

Typical water clarifiers


Characteristic DBO




rate retained\ verted

tasa rebose superficial


k 20C.day-1


treatment water


hours retention

m3/(m.day)

m/day


0.3-0.7

black water without treatment

Pre-sedimentation


3 - 8




0.1-0.2

grey water treated

normal tank

coag & floculation

2 - 8

250

20 - 33


0.1-0.2

contaminated river


softening

4 - 8

250

20 - 40


Speed DBO (k 20C / day)

ascending clariefier

coag & floculation

2

175

55


blackwaters without treatment

0.35-0.70


softening

1

350

100


grey treated waters

0.12-0.23

sedimentation

coag & floculation

0.2




contamined river

0.12-0.23


softening

0.2






Key Parameters for sludge site


requirements

land application

distribution & marketing

landfilling

incineration

ocean disposal


Dewatering of sludge

moderatly

very

very

very

not important


Stabilization of sludge

very

very

moderatly

not important

not important


Community size

not important

moderatly

not important

very

very


Land availability

very

not important

very

not important

not important


Hydrogeology

very

not important

very

not important

not important


Storage

very

very

moderatly

moderatly

very


Good practices

very

very

very

very

very


Sludge pathogens

very

very

not important

not important

not important


Sludge toxic organic chemicals

moderatly

moderatly

moderatly

moderatly

moderatly


metals

very

very

moderatly

moderatly

moderatly


nutrients

very

moderatly

not important

not important

not important


odors aesthetics

very

very

very

very

moderatly


traffic public acceptance

very

moderatly

very

moderatly

not important


transportation requirements

very

very

very

not important

moderatly


energy use

not important

moderatly

not important

very

not important


costs factors

variable




low


regulations

according

according

according

according

according

Sludge application

application

application frequency

low loading

typicalloading

high loading

agriculture application

apply repeatedly to the same sites ever year

2 dry mt / ha.year

15 dry mt / ha.year

70 dry mt / ha.year

forest application

apply to each site one time every 5 years

10 dry mt / ha. 5year

40 dry mt / ha.5year

220dry mt / ha.5year

land reclamation

apply to a site one time only

7 dry mt/ ha

112 dry mt/ha

450 dry mt/ha

dedicated land disposal

apply repeatedly to the same site

220 dry mt / ha.year

227dry mt / ha.year

900dry mt / ha.year

composting

apply to static piles with 28day extended detention

4.2 dry mt / ha

6.7 dry mt/ ha

11.2 dry mt / ha

wide trench landfill

apply 20% solids content sludge to asite one time only

1200 dry mt/ha

3450 dry mt / ha

5450 dry mt / ha

narrow trench landfill

apply 20% solids content sludge to asite one time only

460 dry mt/ha

482 dry mt/ha

2120 dry mt/ha

codisposal

apply 20% solids content sludge to asite one time only

900 dry mt/ha

1800 dry mt/ha

7900 dry mt/ha

Places of use docs

toilet.select.

ecol.impact

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