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On-Site Wastewater Treatment and Disposal Systems - Forced ...

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Process Description<br />

Liouid Stream Seotaqe placed in storage tank at<br />

Addition plant<br />

(31(61(11)(121 Pretreatment (screening, grit<br />

removal)<br />

Controlled bleed into headworks to<br />

prevent shock overload<br />

Sludge Stream Septage placed in storage tank<br />

Addition Fed directly into sludge stream with<br />

(61(11)(121 or without separate conditioning/<br />

h<strong>and</strong>ling<br />

TABLE 9-6<br />

SEPTAGE TREATMENT AT WASTEWATER TREATMENT PLANTS<br />

Design Considerations<br />

Septage volume/characteristics<br />

Plant capacity (aeration <strong>and</strong><br />

solids h<strong>and</strong>linql<br />

Receiving station<br />

- Truck<br />

- Storage<br />

transfer<br />

- Pretreatment (optional 1<br />

- Controlled discharqe to plant<br />

Sludge production<br />

O&M (power, labor, chemicals)<br />

Septage volume/characteristics<br />

Septage receiving/holdino<br />

Organic <strong>and</strong> solids loading on<br />

each sludqe h<strong>and</strong>ling unit<br />

Pumping <strong>and</strong> storage capacity<br />

Additional mixing <strong>and</strong> feeding<br />

equipment<br />

Increase in chemical usaae<br />

Advantaqes bisadvantaaes<br />

Easily implemented<br />

Low capital cost<br />

Public<br />

qood<br />

acceptance<br />

Particularly<br />

desirable at olants<br />

with orimary<br />

clarification<br />

Avoids overloading<br />

secondary <strong>and</strong><br />

tertiary systems<br />

Avoids oossi hility of<br />

final effluent<br />

deqradation<br />

Additional sl udqe neneration<br />

MAV oraanicallv overload olant<br />

Increa&d fMV_<br />

Final disposal site <strong>and</strong> sludae<br />

eauioment<br />

needed<br />

exoansion may he<br />

Additional sludqe oeneratinn<br />

Final disposal site <strong>and</strong> sludoe<br />

eauipment exoansion way he<br />

needed

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