OIT class

BOD

is the biochemical oxygen demand, which measures the amount of oxygen consumed by microorganisms in the decomposition of organic matter in water.

COD

is the chemical oxygen demand, which measures the total amount of oxygen required to chemically oxidize organic and inorganic matter in a water sample.

TOC

is the total organic carbon, which represents the amount of carbon found in organic compounds in water and is an important measure of water quality.

TDS

is the total dissolved solids, which refers to the combined content of all inorganic and organic substances contained in a liquid, typically water.

POTW

is a publicly owned treatment works, which refers to facilities owned by a government entity that treat wastewater before it is discharged into the environment.

UPS

stands for Uninterruptible Power Supply, a device that provides backup power to electronic devices during outages or fluctuations.

CSO

is a combined sewer overflow, which occurs when the volume of wastewater exceeds the capacity of the sewer system, leading to the discharge of untreated sewage into the environment.

ICS

Influent control Structure

WTD

Wastewater Treatment Division

RSPS

Raw Sewage Pumps

CWA

Clean Water Act

NPDES

National Pollution Discharge Elimination System

Hydrogen Sulfide

H2S Rotten Egg Smell

MBR

Membrane bioreactor treatment system

Ozone

O3

Cl2

chlorine gas

DT

detention time (volume/flow)

Methane

CH4

I&I

Inflow and Infiltration

Hypochlorite

ClO bleach

Sulfur dioxide

SO2

Ammonia

NH3

TSS

Total Suspended solids

SSO

Sanitary sewer overflow

effluent

discharge/treated water

Influent

Collection/raw

FOG

Fats, oils, grease

1³

7.48gal

Nitrate

NO3-

MF

Microfiltration (.1-2.0)

UF

ultra filtration (.005-.1)

NF

Nano filtration

RO

reverse osmosis (desalination)

ATS

Automatic transfer switch ( for UPS)

PED

Primary Effluent distribution

DAFT

Dissolved air flotation thickener

ORT

odor reduction tower

MLVSS

Mixed liquor volatile suspended solids

PE

population equivalent

RAS

return active sludge

WAS

waste active sludge

DO

Dissolved oxygen

TS

total solids

MLSS

mixed liqour suspended solids

SVI

Sludge volume index

Q

flow

CBOD

Carbonaceous biochemical oxygen demand

MCRT

mean cell residence time

VS

volatile solids

SRT

Solids retention time

OUR

oxygen uptake rate

F/M

food/microorganisms rate

TBS

Total backwash Solids

MS

mixed sludge

THS

thicken sludge blend

DS

Digested sludge

THSBT

Thicken Sludge Blend Tank

TBSR

Total biological solids retention

ACC

Area control center

MCC

motor control center

FC

Fecal Colform

HOA

hands, Off, auto

SCADA

Supervisory control and data acquisition

HMI

Human machine interface

GC/GMC

Gas mixing compressor