Water Technology is using cookies

We use them to give you the best experience. If you continue using our website, we'll assume that you are happy to receive all cookies on this website.

ContinueLearn More X
X

Hyperion Treatment Plant Sludge-Out

Plant capacity

1.6 million m³/day primary flow

Site size

144 acres (60ha)

Associated sewer run

6,000 miles (9,600km)

Primary sedimentation retention time

1-2 hours

Primary sedimentation efficiency

85% SS removal

Oxygen reactor (OR) retention time

1-2 hours

Cryogenic air system supply to OR

96% pure oxygen

Clarifying tank retention period

4 hours

Clarification efficiency

90% to 95% (cumulative)

Water reclamation for re-use

6%

WAS thickening facilities

12 continuous feed, horizontal solid bowl centrifuges; peak hydraulic loading 227m³/h apiece

Energy recovery system generation capacity

25,000kW (electrical)

Total project cost

$1.4 billion

Plant begins operation

1950

Plant primary treatment expansion

1957

Consent Decree to end ocean disposal of sludge

1980

Energy recovery system construction begins

1983

First energy produced; secondary treatment system capacity expanded to 500,000m³/day

1987

Ocean discharge of sludge ceased

November 1987

New gas and steam turbines installed; air emissions cut by 80%; secondary treatment capacity increased to 800,000m³/day

1988

Energy recovery system fully operational

1989

Phase I construction begins on full secondary treatment facilities

1991

Digester expansion begins

1992

First modules of new secondary treatment operational; co-generation expansion begins

1994

Technical support facility / modernization of the primary treatment begins

1995

Phase I completed / Phase II begins

1996

Expanded Digester Facilities begin operation

1997

Full secondary treatment for all flows

1998

Plant owners

City of Los Angeles

Plant operators

Bureau of Sanitation

Regulators

Environmental Protection Agency; LA Regional Water Quality Control Board

Phase I of the secondary treatment; WAS thickening; digester screening facilities.

Kiewit Pacific Co

Phase II

Tutor-Saliba-Perini-Scott JVC

Technical support facility and the modernization of the primary treatment

M.A. Mortenson

Ductile Iron pipework

American pipe

Coatings

Murphys Industrial

Design engineering team

Daniel Mann Johnson & Mendenhall / Black & Veatch

Other contractors

Dillingham/Ray Wilson; Harris Contracting
Expand

Go Top