Waste Water Treatment Facilities

Front 1

It consist of sludge particles produced in raw or settled waste water(primary effluent) by the growth of organism in aeration tanks in the presence of dissolve oxygen.

Back 1

Activated sludge

Front 2

What are the two present bacteria on activated sludge

Back 2

. Fungi
. Protozoa

Front 3

It is a biological waste water treatment process speeding up decomposition of wastes water being treated. Activated sludge is being added to waste water, and the mixture(mixed liquor) is aerated and agitated. After some time in the aeration tank, the activated sludge settles out by sedimentation and is disposed of (waste) or reused (returned to the aeration tank) as needed. The remaining waste water undergoes more treatment.

Back 3

Activated sludge process

Front 4

Is waste breakdown by microorganisms in dissolved oxygen. Waste sludge is placed in a large aerated tank where aerobic microorganism decompose the organic matter in sludge. This is an extension of the activated sludge process

Back 4

Aerobic digestion

Front 5

Occurs when waste water solids and water (about 5% solids, 95% water) are placed in a large tank where bacteria decomposed the solids in the absence of dissolve oxygen

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Anaerobic digestion

Front 6

What are the two general groups of bacteria act in balance on anaerobic digestion

Back 6

. Saprophytic bacteria- breakdown complex solids to volatile acids
. Methane fermenters- breakdown the acids to methane, carbon dioxide, and water

Front 7

Are microscopic living organism consisting of single cell.

Back 7

Bacteria

Front 8

Bacteria that live and reproduce only in environments containing oxygen for their respiration (breathing)

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Aerobic bacteria

Front 9

Bacteria that live and reproduce in an environment containing no free or dissolved oxygen

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Anaerobic bacteria

Front 10

Bacteria that can live under aerobic or anaerobic conditions

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Facultative bacteria

Front 11

Are bacteria, viruses, or cysts that can cause disease (typhoid, cholera, and dysentery )

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Pathogenic

Front 12

Are organisms (bacteria ) living on dead or decaying organic matter. They help natural decomposition of organic solids in waste water

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Saprophytic bacteria

Front 13

Is a flat board, plate, deflector, guide or similar device constructed or placed in flowing water, waste water or slurry systems to cause more uniform flow velocities, absorb energy, and divert, guide, or agitate liquids

Back 13

Baffle

Front 14

Is the rate microorganism use oxygen in water or waste water while stabilizing decomposable organic matter under aerobic conditions.

Back 14

Biochemical Oxygen Demand

Front 15

Is a mechanical treatment process that cuts large pieces of waste into smaller pieces so they will not plug pipes or damage equipment

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Comminution (shredding)

Front 16

Is a device (porous plate, tube, and bag) used to break the air stream from the blower system into fine bubbles in an aeration tank or reactor

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Diffuser

Front 17

Is a tank where sludge is placed to allow decomposition by microorganism.

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Digester

Front 18

Is the process that kills most microorganism in waste water, including essentially all pathogenic bacteria.

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Disinfection

Front 19

What is the most frequent way to disinfect

Back 19

Used of chlorine

Front 20

Is a molecular oxygen dissolved in water or waste water

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Dissolved oxygen

Front 21

Are solids in water or waste water consisting mainly of inorganic salts, small amount of organic matter, and dissolved gases that will pass through a filter with the water

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Dissolve solids (filter able residue)

Front 22

Is the rotating mechanism that distributes the waste water evenly over the surface of a trickling filter or other process unit

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Distributor

Front 23

Is waste water or other liquid (raw, or partially or completely treated) flowing from basin, treatment process, or treatment plant

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Effluent

Front 24

Are the facilities where waste water enters a wastewater treatment plant. It may consist of bar screens, comminutors, a wet well, and pumps

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Head works

Front 25

Is a deep two-story tank having an upper, continues sedimentation chamber and a lower, sludge-digestion chamber

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Imhoff tank

Front 26

Is a waste water or other liquid (raw or partially treated) flowing into reservoir , basin, treatment process, or treatment plant

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Influent

Front 27

Is a waste material such as sand, salt, iron, calcium, and other mineral materials which are only slightly affected by the action of organism

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Inorganic waste

Front 28

Are substance required to support living plants and organism

Back 28

Nutrients

Front 29

What are the major nutrients that are difficult to remove from wastewater by conventional treatment process. They are water soluble and tend to recycle

Back 29

. Nitrogen
. Phosphorus

Front 30

Is a waste material from animal or vegetable sources. Generally can be consumed by bacteria and other small organism

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Organic waste

Front 31

Is the movement or flow of water through soil or rocks

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Percolation

Front 32

Is any change in the natural state of water which interferes with its beneficial reuse or causes failure to meet water-quality requirements

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Pollution

Front 33

Is the removal of metal, rocks, rags, sand, eggshell, and similar materials which may hinder the operation of a treatment plant. It is accomplished by using equipment such as rocks, bar screens, comminutors, and grit removal system

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Pretreatment (preliminary treatment)

Front 34

Is the wastewater treatment process used to convert dissolved or suspended materials into a form more readily separated from the water being treated

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Secondary treatment

Front 35

Is a waste water solids floating at the surface, buoyed up by entrained gas, grease, or other substances.

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Scum

Front 36

It refers to a mass of sludge containing very concentrated population of microorganism

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Seed sludge

Front 37

Is the settling tank that retains the sludge in immediate contact with the wastewater flowing through it. Sludge is retained long enough to secure satisfactory decomposition of organic solids by anaerobic bacterial action

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Septic tank

Front 38

Is the used water and solids from homes flowing to a treatment plant. The preferred term is "wastewater"

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Sewage

Front 39

Is the arrival at plant of waste which is toxic to organism in sufficient quantity or strength to cause operating problem. Possible problem include odors and sloughing off of the growth or slime on the trickling media

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Shock load

Front 40

Is the settable solids separated from liquids during processing, or deposits of foreign materials found on a stream bottom or any body of water

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Sludge

Front 41

Solids that either float on the surface of, or are in suspension in water, waste water, or other liquids, and are largely removable by laboratory filtering, or the quantity of material removed from wastewater in a laboratory test.

Back 41

Suspended solid (non-filterable residue)

Front 42

Is the liquid removed from settled sludge, and commonly refers to the liquid between the sludge on the bottom and the scum on the surface of an anaerobic digester. This liquid is usually returned to either the influent wet well or to the primary clarifier

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Supernatant

Front 43

Is any process of water renovation that upgrades treated wastewater to meet specific reuse requirement

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Tertiary treatment (advance waste treatment)

Front 44

Is a wall or plate placed on an open channel used to measure flow. Is also a wall or obstruction used to control flow (from clarifiers) to assure uniform flow and avoid short-circuiting

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Weir

Front 45

A compartment or room in which wastewater is collected. The suction pipe of a pump may be connected to the it, or submersible pump may be located in it

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Wet well

Front 46

What are the types of waste discharge

Back 46

. Domestic
. Industrial
. Thermal heated waste
. Radioactive (nuclear) waste

Front 47

If pathogenic bacteria are not treated and are deposited into receiving waters, what are the diseases may occur

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. Typhoid
. Cholera
. Dysentery
. Polio

Front 48

What are the reasons for water treatment

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. Domestic use
. Aquatic life
. Recreational use
. Industrial use

Front 49

What are the types of solids in wastewater

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. Dissolved solids
. Suspended solid

Front 50

This is the total residue of solid waste contained in wastewater

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Total solids

Front 51

What are the four categories of suspended solid

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. Settlable solid
. Non-Settlable solid
. Floatable
. Organic and inorganic