Chapt 6.1-6.4 (Water Quality Control)

Question 1

Goal of Wastewater Treatment

Answer 1

To reduce toxins me kill pathogens. This also reduces the BOD and nutrient loading.

Question 2

NPDES National Pollutant Discharge Elimination System

Answer 2

Permit that requires discharger to meet certain technology based effluent limits and perform effluent monitoring.

Question 3

SDWA basic requirements

Answer 3

Requires EPA to establish national standards for drinking water quality.

Requires operators of public water systems to monitor the quality of water being delivered and makes sure it meets standards

Question 4

Primary Standards

Answer 4

Enforceable standards based on health related criteria

Question 5

Secondary Standards

Answer 5

Standards based on aesthetics. Can’t enforce them.

Question 6

Maximum Contaminate Levels

Answer 6

The enforced level of contaminate

Question 7

Maximum Contaminate Level Goal

Answer 7

The ideal goal of Contaminate level. Not enforced.

Question 8

MCL groupings

Answer 8

Synthetic Organic Chemicals

Volatile Organic Chemicals

Disinfectant Byproducts

Question 9

Radionuclides

Answer 9

Radioactive compounds. Have own MCL.

Question 10

Microbiological Standards

Answer 10

Category of MCL’s for microbiological contaminated

Question 11

Indicator Organisms

Answer 11

Bacteria that suggest the water is contaminated. Used to indicate for harder to detect bacteria. Ex: coliform bacteria

Question 12

Surface water Treatment Steps

Answer 12

Screening

1st Sedimentation

Coagulation

2nd Sedimentation

Filtration

Sludge Processing

Disinfection contact

Question 13

Ground Water Treatment

Answer 13

Aeration

Flocculation

Sedimentation

Recarbonation

Filtration

Disinfection

Sludge Processing

Question 14

Primary vs Secondary Disinfection

Answer 14

Primary kills pathogens

Secondary prevents regrowth

Question 15

Water Hardness

Answer 15

The level of multitalented cations in water. Groundwater is normally harder.

Question 16

Softening Approaches

Answer 16

Lime soda ash process

ion exchange process

Question 17

Primary Sludge

Answer 17

Raw sludge. Solids that settle in primary settling tank

Question 18

Biological (secondary) Treatment

Answer 18

Micro organisms are used to convert organic wastes to stable and low energy compounds. Either suspended or attached.

Question 19

Yield Coefficient

Answer 19

Proportionality constant of biomass of new cells on microbial mass growth rate

Question 20

Activated Sludge

Answer 20

Sludge used in suspended growth biological treatment

Question 21

Mixed Liquor

Answer 21

Mixture of aerated water and microbial mass in activated Sludge treatment

Question 22

Membrane Bioreactor

Answer 22

Micro Phil Traciann membranes have been in Cloyd in suspended growth biological reactors decrease the size of secondary treatment tankage and to improve the suspended solids separation efficiency. These reactors can help avoid the need for a secondary clarifier