Sanitary wastewater process wastewater Cooling water wastewater Pollutant

: ﻣﻨﺸﺎ ﺗﻮﻟیﺪ ﻓﺎﺿﻼﺏ ﻫﺎی ﺻﻨﻌﺘی Sanitary wastewater process wastewater Cooling water wastewater

Pollutant classification in wastewater: *- Biodegradable organic matter *- Total suspended solid *- Nutrient *- Pathogens *- Heavy metal *- Refractory organic matter

Wastewater treatment process: Physical process Chemical process Biological process

Level of wastewater treatment Raw wastewater Preliminary treatment Primary treatment Effluent secondary treatment tertiary treatment

4 - Tertiary treatment Advanced treatment ﺗﺼﻔیﻪ ﻣﺮﺣﻠﻪ ﺳﻮﻡ ﺗﺼﻔیﻪ پیﺸﺮﻓﺘﻪ ﺑﻬﺒﻮﺩ کیﻔیﺖ ﺷیﻤیﺎیی ﻭ ﻣیکﺮﻭﺑی پﺴﺎﺏ : ﻫﺪﻑ : ﻭﺍﺣﺪﻫﺎ ﺷﺎﻣﻞ - Sand filtration - Chemical precipitation - Chemical coagulation -Activated carbon Adsorption

Pretreatment Neutralization sedimentation Oil and greas removal Chemical precipitation Adsorption Chemical coagulation Dissolved Air flotation

: ﺗﺼﻔیﻪ ﺧﺎﻧﻪ ﻫﺎی ﻓﺎﺿﻼﺏ ﺻﻨﻌﺘی ﺑﻪ ﺩﻭ ﺻﻮﺭﺕ ﺍﺣﺪﺍﺙ ﻣی ﺷﻮﻧﺪ Centralized wastewater treatment plant Decentralized wastewater treatment plant

Anaerobic -Energy consumption Low Biogas production 0. 07 - 0. 1 kwh/kg COD - Sludge production Low 0. 03 – 0. 1 kg/kg. COD - Land Area required Low Compact installation Aerobic High Air input 0. 7 – 1 kwh/kg. COD High 0. 2 - 0. 6 kg/kg. COD High Large surface Area

Anaerobic digestion Acidfying bacteria biogas production 20 – 30 % CO 2 Methanogenic bacteria low

Potential Areas of wastewater reuse General – landscape - Irrigation : Edible crops - Boiler feed water Cooling water make-up Utility water Process water

es Recommended microbiological Quality Guidelines for wastewater use in Agriculture Category Reuse conditions Exposed group Intestinal nematodes Fecal coliforms (geometric mean no. Per 100 ml) (arithmetic mean no of egg per liter ) A Irrigation of crops likely to be eaten uncooked, sports fields public parks Workers, consumer, public ≤ 1 B Irrigation of cercal crops, Industrial crops, pasture and Workers ≤ 1000 No standard recommended

: ﺭﻭﺵ ﺗﺼﻔﻴﻪ ﻓﺎﺿﻼﺏ ﺍﻧﺴﺎﻧی ﺩﺭ ﺻﻨﺎیﻊ کﻮچک Septic tank + Absorption field Septic tank + Wet land Septic tank + WSP

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