Texas Wastewater A ( Test 2) Solutions with 100% correct Answers

What is TCEQ doing to control, "point source" pollution in the Texas waterways? - Correct Answer TCEQ approves permits for domestic wastewater plants and Permitting of industrial wastewater plants. Describe proper design of force main wastewater lines. - Correct Answer Minimum two feet per second velocity, with the smallest pump operating alone. Minimum four inch diameter pipe, with 150 psi rating. What is Standard Dimension Ratio? - Correct Answer Ratio of outside pipe diameter, (OD) to wall thickness (PVC) gravity wastewater lines are designed - Correct Answer to flow half full ,under normal conditions, at a minimum of two feet per second, and a maximum of ten feet per second. What is the standard chlorine residual, and minimum contact time, on Texas wastewater permits? - Correct Answer 1 milligram per liter for a minimum 20 minutes detention time at peak flow. However, no chlorine residual needed, if detention time is greater than 21 days. As the complexity of an organization increases, what management function becomes most important? - Correct Answer As the complexity of an organization increases, the management function of management becomes most important. What is the effective chlorine disinfecting agent in disinfection? - Correct Answer Hypochlorous Acid (HOCl) Hypochlorous Acid - Correct Answer it is much more effective at pH levels below 7 .above ....7 the acid begins to be neutralized. What is the effluent chlorine residual in Texas that is standard on permits and the minimum detention time? What is the maximum residual allowed? - Correct Answer The Texas standard, is 1 milligrams per liter, for a minimum 20 minutes detention time, at peak flow. Maximum residual allowed, is 4 milligrams per liter. Anaerobic digester gas should contain? - Correct Answer 65 to 75% methane, 25 to 35% carbon dioxide, and 1 to 5% nitrogen. What are some of the causes of filaments in the aeration basin? - Correct Answer low DO, low organic loading, septic wastes,