overview of wastewater treatment

8/16/2019 Overview of Wastewater Treatment

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Overview of Wastewater

Treatment2. SOURCE OF

WASTEWATER

1. PURPOSE OF TREATMENT

3. WASTEWATERCOLLECT ON S!STEM

". T!P CAL TREATMENT

FAC L T ES

#. NFLUENT

$. PREL M NAR! TREATMENT

11. SOL %S &AN%L N'

1(. % S NFECT ON )EFFLUENT % SC&AR'E

*. TERT AR! TREATMENT

+. SECON%AR! TREATMENT

,. PR MAR! TREATMENT


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1.(1 To remove t-ese o//0tants from waterso t-at it an e 0se4 a5ain. Wastewatertreatment s-o0/4 6•

revent -ea/t- -a77ar4• Prote t 4rin8in5 water s0 /ies• Provi4e s0ita /e water for rea reationa/ 0ses• Prote t t-e e o/o59 of stream /a8es an4

ot-er o4ies of water into w-i - wastewater 4is -ar5e4


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Water 9 /e 6 nat0ra/ an4 man:ma4e


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1.(2 Wastewater treatment -e/ s toontro/ t-ese an4 ot-er 4isease

e;e tive/9.1.(3 To re40 e water -as an0n /easant o4or an4


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3. WASTEWATER COLLECT ONS!STEM

1.(+ Co//e tion s9stem is t-e networ8 of i e arr9in5wastewater to treatment a /ant. Com onents 6• &o0se onne tion >trans ort waste from 4we//in5 to i in5

networ8?•

Latera/ >sma//est i es of t-e networ8?• Main or tr0n8 >sewers w-i - re eive @ow from severa/

/atera/s?• nter e tor >ma or sewer /ines i 8in5 0 from tr0n8 an4

mains an4 trans ortin5?• Man-o/es >5ive a ess to t-e s9stem for ins e tion an4

maintenan e?• Lift stations or 0m insta//ations>/o ate4 at /ow areas of

t-e s9stem?


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3. WASTEWATER COLLECT ONS!STEM

1.(* n


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". T!P CAL TREATMENT FAC L T ES

T-e 5enera/ rin i /es in wastewatertreatment is to remove o//0tants fromt-e water 9 5ettin5 t-e eit-er tosett/e or to @oat an4 t-en removin5t-is materia/.


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". T!P CAL TREATMENTFAC L T ES

A mo4ern wastewater treatment /ant ma9in /04e t-ese sta5es 61. n@0ent

2. Pre/iminar9 treatment3. Primar9 treatment". Se on4ar9 treatment#. Tertiar9 treatment$. %isinfe tion an4 eB0ent 4is -ar5e,. So/i4 -an4/in5+. Si4estreams


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5am ar


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#. n@0ent• n@0ent is t-e raw materia/ t-at -as

een o//e te4 an4 onve9e4 to t-e/ant for treatment. t in /04e a// t-e

water an4 4e ris• T-e o erator m0st 8now t-e rate of

@ow of t-e in@0ent 9 meas0rin5 ormeterin5.

• 'am ar t9 i a/ variations in sewa5e


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$. Pre/iminar9 treatment>First Sta5e of P0ri< ation?

P0r ose 6 remove /ar5e o e t fromwastewater

T-ree Pro esses 61. S reenin5 >Lar5e o e t s0 - as

sti 8s ra5s an4 oran5e ee/s et ?2. 'rin4in5 >%e ris to a si7e sma//?3. 'rit remova/ >Remove san4 5rave/

an4 ot-er -eav9 4e ris?


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$. Pre/iminar9 treatment>First Sta5e of P0ri< ation?

Commin0tors or armin0tors is Waterfa i/ites om ine t-e s reenin5 an45rin4in5 o erations.

'am ar


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,. Primar9 treatment D C/ariSe4imentations asins or Sett/in5 Tan8s?

• T-e 0r ose is to remove most of t-e so/i4ssti// s0s en4e4 in t-e wastewater. E=am /e 6si/t /a9 a/5ae a teria an4 so on.

•

Parti /es -eavier t-an water sin8 to ottomformin5 rimar9 s/045e.>remove4 an40m e4?

• Parti /es /i5-ter t-an water @oat to t-es0rfa e formin5 s 0m. >s ra e4?

• T-e rimar9 /ari


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+. Se on4ar9 treatment

T-e 0r ose is onverts most of t-e 0nsetta /emateria/ remainin5 in t-e wastewater to a setta /eform. Severa/ variations treatments61. A tivate4 s/045e2. Tri 8/in5


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'am ar mi8roor5anisme


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1. A tivate4 s/045e >A S0s en4e4'rowt- S9stem?

• n t-is ro ess a 0antit9 ofio/o5i a/ wit- its mi roor5anisms

• Mi=e4 /i 0or is t-e wastewater an4a tivate4 s/045e. P/a e in a asinw-i - is s0 /ie4 wit- aerations9stem. Two 0r ose 6 mi=es an4

rovi4es.


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• 'am ar a tivate4 s/045e ro


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2. Tri 8/in5 Fi=e4:'rowt-S9stem?

• Pro ess same as in t-e a tivate4s/045e 0t one 4i;erent.

• n t-e a tivate4 s/045e t-e io/o5i a/mass move wit- wastewater.

• n tri 8/in5


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A tivate4 io


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Rotatin5 io/o5i a/ onta tors

• Rotatin5 io/o5i a/ onta tors onsists of a5ro0 of /asti 4is8s mo0nte4 on s-afts an4

artia//9 immerse4 in wastewater.•

A t-i 8 s/ime 5rows on t-e rotatin5 4is8s.• A t-in


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'am ar rotatin5 io/o5i a/


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La5oons• La5oons io/o5i a//9 rea8 4own or5ani

matter an4 remove s0s en4e4 so/i4 fromwastewater.

•

P0ri< ation is m0 - s/ower t-an for ot-ermet-o4s of se on4ar9 treatment• Lon5 -o/4in5 time are rovi4e4 40rin5

w-i - t-e wastewater is sta i/i7e4 9aero i an4 anaero i mi roor5anisms.

• T-e treate4 wastewater /eaves t-e /a5oonit is 0s0a//9 4isinfe te4.


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'am ar /a5oon

er ar9 rea men


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. er ar9 rea men>T-ir4 sta5e or A4van e4 wastewater

treatment?

• T-e 0r ose is removes o//0tantst-at were not remove4 or ren4ere4-arm/ess 9 ear/ier treatment

ro ess.• Pro ess often fo 0s on t-e remova/ of

nitrates -o -ates s0/fates an4ot-er inor5ani om o0n4s. An5or5ani om 0n4 s0 - as esti i4es


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• 'am ar t9 i a/ -emi a/ tertiar9Coa50/ants a/0m an4 ferri -/ori4e

Po/9mers 0se4 to ai4 in t-e a t0re of


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EB0ent 4is -ar5e• s teste4 efore -ar5e to see if it

meets 5overnment stan4arts.• &e/ 4etermine -ow e ient/9 t-e

/antin5• EB0ent is 0s0a//9 4is -ar5e4 into

re eivin5 waters.


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11. So/i4 -an4/in5

• T-e 0r oses6• To re40 e t-e n0m er orf -armf0/

or5anisms in t-e s/045e• To ontro/ o;ensive o4ors• To re40 e t-e vo/0me an4 wei5-t of

t-e s/045e


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S/045e ontain a -i5- er enta5e ofor5ani materia/ w-i - e sta i/i7e4

efore 4is osa/. T-e most ommon twomet-o4 are1. Anaero i 4i5estion2. Aero i 4i5estion


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• 'am ar asi s/045e -an4/in5a/ternatives

overview of wastewater treatment

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