Water Treatment Wastewater

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Wastewater Treatment


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Wastewater Treatment

Occurs at designed plants that accept municipal

sewage from homes, business, and industrial sites

Raw sewage is delivered to the plant through a

network of pipesTreated water is discharged into the surface water

environment or used for another purpose

Divided into three categories; primary, secondary,

and advanced treatment


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Sewage Treatment Process

Landfill/mine reclamation

Secondary Treatment

Air

Rawsewage

Grit

ChamberSludge

Digester

Activated

Sludge

Sludge drying beds

Sedimentation

Tank

Aeration TankFinal

Sedimentation

Tank

Screens Rivers, lakes,

oceans, etc.

Primary Treatment

Disinfection


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Sewage Treatment Process

Primary Treatmentremoves 30% -40% of the pollutant volume inthe form of suspended solids and organic matter

Screenremoval of large floating material

Grit Chamberremoval and disposal of sand, small stones andgrit

Primary Sedimentation Tankparticulate matter settles out toform the sludge

Secondary Treatment - removes 90% of the pollutant

Aeration tank the waste water is pumped with air

Final Sedimentation Tankthe sludge settles out

Digesterthe sludge from the primary and secondary sedimentationtanks are where it is treated with an anaerobic bacteria


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Sustainable Water Use

Sustainable water use the use of water resources bypeople that allow our society to develop and flourishinto an indefinite future without degrading the variouscomponents of the hydrologic cycle

Criteria Develop water resources in sufficient volumes to maintain human

health and well-being

Provide sufficient water resources to guarantee the health andmaintenance of the ecosystem

Ensure the minimum standards of water quality for the varioususers of water resources

Promote the use of water-efficient technology and practice

Gradually eliminate water pricing policies that subsidize theinefficient use of water


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Sustainable Water Use

Water Conservation the careful use and protection of waterresources and involves both the quantity of water used and its quality

Water Management

Wastewater Renovation and Conservation Cycle

Three Major Steps: Return of treated wastewater to crops via sprinkler or other irrigation

system

Renovation or natural purification by slow percolation of the wastewaterthrough the soil, to eventually recharge the groundwater resource withclean water

Reuse of the water by pumping it out of the ground for municipal,industrial, institutional, or agricultural purposes

Water Reuse the use of the wastewater following some sort oftreatment


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Existing Philippine Laws

DAO 34 - Revised Water Usage &

Classification / Water Quality Criteria

DAO 35 - Revised Effluent Regulations of

1990


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Water Classification

Fresh Surface Waters (rivers, lakes,

reservoirs, etc.)

Class AA- Public Water Supply Class I

- uninhabited and protected watersheds,

requires only approved disinfection inorder to meet the National Standards for

Drinking Water (NSDW)


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Class A- Public Water Supply Class II

- sources of water supply that requires

only complete treatment (coagulation,sedimentation, filtration, & disinfection) in

order to meet the NSDW standards

Class B- Public Water Supply Class III

- for primary recreation such as bathing,

swimming, skin diving, etc. (particularlythose designated for tourism purposes)


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Class C

*Fishery Water

- for the propagation & growth of fish & aquaticresources

*Recreational Water Class II

- boatings, etc.

* Industrial Water Supply Class I-for manufacturing processes after treatment

Class D

* for agriculture, irrigation, livestock watering, etc.* Industrial Water Supply Class II

- cooling, etc

*other inland waters


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Coastal & Marine Waters

Class SA

- water suitable for propagation, survival &

harvesting of shellfish for commercial

purposes- tourist zones & national marine parks &

reserves

- corral reef parks & reserves


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Class SB

* Recreational Water Class I- areas regularly used for bathing,

swimming, skin diving, etc.

* Fishery Water Class I- spawning areas for bangus & other

similar species


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Class SC

* Recreational Water Class II

- boating, etc.

* Fishery Water Class II

- commercial & sustainance fishing

* Marshy &/or mangrove areas declared as fish &wildlife sanctuaries

CLASS SD* Industrial Water Supply Class II

- cooling, etc.

- other coastal & marine waters

Water Treatment Wastewater

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