TEEX Wastewater Treatment Chapter 1 (with Complete Solutions)

The goals and purpose of the state of Texas for water and wastewater are : correct answers The purpose of the state for maintaining water quality are: 1, protect public health, 2 protect wildlife, 3, help operating industries, 4, protect economic development, 5, Promote wastewater collection, and disposal systems, 6, Implement the state water plan How are Total Dissolved Solid measured correct answers Total dissolved solids, are measured by pouring wastewater through a filter, then weighing the filter. What are the settling characteristics, of non settleable solids correct answers Non Settleable solids that do not settle, when left standing for one hour, in an Imhoff cone. How are Volatile solids measured correct answers Volatile solids, (VSS) are measured, by burning the residue, from the total solids , in a muffle furnace. The fraction that is burned off, (volatile) represents, volatile organic solids. What do floatable solids consist of correct answers Floatable solids, consist of small particles, that will not settle out. Their specific gravity, is less than that of water. Floatable solids, would be included, in a TSS measurement. What does the inorganic solids consist of correct answers The inorganic solids consists of sand, grit, and minerals, which are suspended, or dissolved, in the water. Dissolved inorganic minerals, include, chlorides, sulfates, nitrates, phosphates Describe Organic, or Volatile Solids correct answers Organic solids can be suspended, or dissolved, and constitute, about 65%, of the total solids. What is the BOD of raw wastewater correct answers The BOD of raw wastewater, varies from 100, to 300, mg/L. Approximately, 0.17 lbs of BOD, contributed daily, by each person is called, the BOD, population equivalent. Describe the first stage of the BOD test correct answers First stage of BOD, is called, Carbonaceous, Biochemical Oxygen Demand, oxygen demand, is due to bacterial stabilization, of carbonaceous material.