Modern Sewage Treatment Plant

Information about Modern Sewage Treatment Plant

Published on August 6, 2014

Author: modernstp

Source: authorstream.com

Content

Sewage Treatment and Recycle : Sewage Treatment and Recycle What is sewage?: What is sewage? Sewage is the wastewater originating in homes from Kitchen Laundry Wash Basins Bath rooms & Toilets Floor Wash In one word, it is all the wastewater that comes out of homes / human use Where does it all go!: Where does it all go! Where does the water from the washer go? When you flush the toilet where does the contents go? By gravity flow, the waste is on its way to your local wastewater treatment plant! Sewage composition ….: Sewage composition …. Solids like vegetable peelings, rice, plastic covers etc Oil & Grease from Kitchen / Laundry Suspended solids from kitchen Chemicals from detergents Mild colors from laundry / food Pathogenic microbes from fecal matter Physical impurities, dissolved chemical impurities & Microbiological impurities Wastewater Composition: Wastewater Composition 99.95% Water + 0.05% Impurities Why treat wastewater?: Why treat wastewater? ? Hazards of wastewater?: Hazards of wastewater? 34 Lakh children die every year due to water borne diseases. 99% of this are from developing countries That is every one child every 21 seconds Water borne diseases originate from human execrate Un-treated Sewage is a time bomb that can’t be de-fused: Un-treated Sewage is a time bomb that can’t be de-fused !!! Why treat wastewater?: Why treat wastewater? Causes a demand for dissolved oxygen (lowers DO levels of streams) Adds nutrients (nitrate and phosphate) that cause excessive growth Stinks otherwise Increases suspended solids or sediments in streams (turbidity increase) To comply with Environmental norms Less than 10% of the sewage only is treated: Less than 10% of the sewage only is treated How is Sewage treated?: How is Sewage treated? Levels of Treatment: Levels of Treatment Primary removal by physical separation of grit and large objects (material to landfill for disposal) Secondary aerobic microbiological process (sludge) organic matter + O 2  CO 2 + NH 3 + H 2 O NH 3  NO 3 - lowers suspended solids content (into sludge) aquatic nutrient Mostly dead microbes PowerPoint Presentation: Aeration and rapid mixing Settling collects sludge on bottom Secondary process air diffuser From primary process To tertiary process Levels of Treatment continued: Levels of Treatment continued Tertiary (advanced) anaerobic microbiological process with a different microbe where O 2 is toxic (more sludge) NO 3 -  N 2 (escapes to atmosphere) PO 4 -3 if not removed in sludge in secondary process PO 4 -3 + Al +3  AlPO 4 (s) (into sludge) - aeration to strip N 2 and re-oxygenate (add DO) PowerPoint Presentation: Slow mixing to keep suspended and O 2 out Settling collects sludge on bottom Tertiary process From secondary process Effluent add methanol as food source When the treatment is done…: When the treatment is done… Effluent back to stream after Chlorination / de-chlorination and a final carbon filtration For re-use advanced filtration methods Ultra-Filtration Sludge – very nutrient rich applied directly to land as fertilizer incinerated (good fuel after drying) composted (good manure) Why Recycle Sewage?: Why Recycle Sewage? ? Treated Sewage is the most reliable source of water: Treated Sewage is the most reliable source of water Packaged Sewage Treatment Plants 5, 10, 15, 20, 25, 30, 40, 50, 75, 100, 125 & 150 KLD: Packaged Sewage Treatment Plants 5, 10, 15, 20, 25, 30, 40, 50, 75, 100, 125 & 150 KLD Custom Designed STP 50 KLD & Above: Custom Designed STP 50 KLD & Above Sewage Recycling Plants (UF) 25, 50, 75, 100KLD & Custom Designed: Sewage Recycling Plants (UF) 25, 50, 75, 100KLD & Custom Designed Septic Tanks & Rainwater Harvesting Plants: Septic Tanks & Rainwater Harvesting Plants Contact us…: Contact us… PLOT NO. 201/7 PHASE-II IDA CHERLAPALLY, HYDERABAD- 051 Ph: 040-27260070 Fax: 040-27260060 Customer Care: 850-100-6000 www.modernstp.com [email protected]

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