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Biological De-Nitrification Process in Waste Water Treatment System

Author: Haseeb Jamal / Date: Dec 12, 2017 / Tags: Waste Water
Biological reduction of nitrate to nitric oxide, nitrousoxide, and nitrogen gas. Involves both nitrification and denitrification. Biological nitrogen removal (BNR) is more cost effective and used more often as compared to ammonia stripping, breakpoint chlorination and ion exchange; BNR is used in wastewater treatment where: there are concerns for eutrophication;

Biological Nitrification Process in Waste Water Treatment System

Author: Haseeb Jamal / Date: Dec 12, 2017 / Tags: Waste Water, Processes, Factors Affecting
Total concentration of organic and ammonia nitrogen in municipal wastewater in the range 25‐ 45 mg/L as nitrogen based on flowrate of 450 L/capita.d (120 gal/capita.d). With limited water supplies, total nitrogen in excess of 200 mg/L as N measured in domestic wastewater. Drinking water maximum MCL for nitrate nitrogen is 45 mg/L as nitrate or 10

Standard Test for Consistency of Cement Paste by Vicat Apparatus

Author: Haseeb Jamal / Date: Dec 03, 2017 / Tags: Lab-Notes, Concrete Lab
This test method is used to determine the amount of water required to prepare hydraulic cement pastes with normal consistency, as required for certain standard tests. The percentage amount of water which is required to prepare standard cement paste when vicat plunger penetrate under 10±1mm reading is known as standard consistency or normal consistency

Standard Test Method for Air Content of Hydraulic Cement Mortar

Author: Haseeb Jamal / Date: Dec 03, 2017 / Tags: Lab-Notes, Concrete Lab
Proportion the standard mortar using 350 g cement to 1400 g 20–30 standard sand and sufficient water to give a flow of 871⁄2 6 71⁄2 %. The flow is the resulting increase in average diameter of the mortar mass, as determined with the calipers, measured on at least four diameters at approximately equi-spaced intervals, expressed as a percentage of the original

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