wastewater treatment - tertiary and sludge handling prepared by furby ramos
TRANSCRIPT
-
7/25/2019 Wastewater Treatment - Tertiary and Sludge Handling Prepared by Furby Ramos
1/23
Wastewater Treatment
Sludge/Biosolids Handling
Prepared by:
Franz Furby C. Ramos
-
7/25/2019 Wastewater Treatment - Tertiary and Sludge Handling Prepared by Furby Ramos
2/23
What remains to be disposed of is a mitureof solids and !astes during the !aste!atertreatment is "alled pro"ess residuals ormore "ommonly referred to as sludge orbiosolids.
Sludge is "ommonly a""epted name for
!aste!ater solids# ho!e$er if the!aste!ater sludge is used for bene%"ialreuse it is referred to as biosolids.
-
7/25/2019 Wastewater Treatment - Tertiary and Sludge Handling Prepared by Furby Ramos
3/23
Sludge treatment methods are generallydi$ided into three ma&or "ategories:
'hi"(ening
Stabilization
)e!atering
-
7/25/2019 Wastewater Treatment - Tertiary and Sludge Handling Prepared by Furby Ramos
4/23
Sour"es of Sludge
Waste!ater sludge is generated in primary*se"ondary* and "hemi"al treatment pro"esses.
+n primary treatment the solid that ,oat or settleare remo$ed (no!n as s"um. 'he settleablematerial that "olle"ts on the bottom of the
"lari%er "an also be referred to as primary sludgeor ra! sludge
-
7/25/2019 Wastewater Treatment - Tertiary and Sludge Handling Prepared by Furby Ramos
5/23
Solids not remo$ed in primary "lari%er arereferred to as "olloidal suspended solids. 'hese"ondary treatment is designed to "hange those"olloidal solids into settleable solids that "an be
remo$ed.
-n"e in the settleable form in the se"ondary"lari%er the sludge "olle"ted at the bottom of the
se"ondary "lari%er is "alled se"ondary sludge.
-
7/25/2019 Wastewater Treatment - Tertiary and Sludge Handling Prepared by Furby Ramos
6/23
Sludge Chara"teristi"s
Sludge "ontains about 0 1 !atter.
Sludge handling may represent up to 234
-
7/25/2019 Wastewater Treatment - Tertiary and Sludge Handling Prepared by Furby Ramos
7/23
+n the pro"ess of purifying !aste!ater*another problem is "reated: sludge. 'hehigher the degree of !aste!ater treatment*the larger the residue of sludge that mustbe handled.
-
7/25/2019 Wastewater Treatment - Tertiary and Sludge Handling Prepared by Furby Ramos
8/23
-
7/25/2019 Wastewater Treatment - Tertiary and Sludge Handling Prepared by Furby Ramos
9/23
'he basi" pro"esses for sludge treatment
are:
1. Preliminary operations:
S"reening* grinding* degritting* blending* andstorage may be part of the preliminary operationsto prote"t do!nstream e5uipment and/or pro$ide
a homogeneous feed to subse5uent pro"essfa"ilities.
-
7/25/2019 Wastewater Treatment - Tertiary and Sludge Handling Prepared by Furby Ramos
10/23
2. Thickening:
'hese pro"esses are used to separate !ater fromthe solids to redu"e the size of subse5uent
fa"ilities and to impro$e their e"ien"y. 'he !ateris separated by gra$ity* ,otation* gra$ity belt*rotary drum %ltration* or "entrifugation.
-
7/25/2019 Wastewater Treatment - Tertiary and Sludge Handling Prepared by Furby Ramos
11/23
Sludge thi"(ening
+t is a unit pro"ess used to in"rease solid "ontentof the sludge by remo$ing a portion of the li5uid
fra"tion.
'his pro"ess in"ludes: ;ra$ity thi"(eners
Flotation thi"(eners
Solids "on"entrators:
-
7/25/2019 Wastewater Treatment - Tertiary and Sludge Handling Prepared by Furby Ramos
12/23
;ra$ity thi"(ening is most e
-
7/25/2019 Wastewater Treatment - Tertiary and Sludge Handling Prepared by Furby Ramos
13/23
-
7/25/2019 Wastewater Treatment - Tertiary and Sludge Handling Prepared by Furby Ramos
14/23
-
7/25/2019 Wastewater Treatment - Tertiary and Sludge Handling Prepared by Furby Ramos
15/23
7. Stabilization:
Sludge is stabilized to redu"e pathogens* eliminateo
-
7/25/2019 Wastewater Treatment - Tertiary and Sludge Handling Prepared by Furby Ramos
16/23
-
7/25/2019 Wastewater Treatment - Tertiary and Sludge Handling Prepared by Furby Ramos
17/23
AEROBI !I"E#TIO$ PROE##
O$TRO% A%&%ATIO$#
-
7/25/2019 Wastewater Treatment - Tertiary and Sludge Handling Prepared by Furby Ramos
18/23
'. on(itioning:
'hese pro"esses treat the sludge !ith
"hemi"als or heat so that more !ater "anbe readily separated.
-
7/25/2019 Wastewater Treatment - Tertiary and Sludge Handling Prepared by Furby Ramos
19/23
). !ewatering:
'hese pro"esses are used to further redu"ethe !ater to meet disposal regulations*impro$e handling* redu"e transportation "osts*pre$ent lea"hate from disposal sites and* inthe "ase of follo!?on redu"tion pro"esses =i.e.*in"ineration>* redu"e the energy re5uirements.
'he separation pro"esses in"lude"entrifugation* %lter presses* and drying beds.
-
7/25/2019 Wastewater Treatment - Tertiary and Sludge Handling Prepared by Furby Ramos
20/23
-
7/25/2019 Wastewater Treatment - Tertiary and Sludge Handling Prepared by Furby Ramos
21/23
-
7/25/2019 Wastewater Treatment - Tertiary and Sludge Handling Prepared by Furby Ramos
22/23
Belt %lter press
-
7/25/2019 Wastewater Treatment - Tertiary and Sludge Handling Prepared by Furby Ramos
23/23
Treate( #l*(ge +,iosoli(s-