Wastewater

WasteWater Sources & Characteristics: What is the most common reason for a wastewater to contain intermittent large amounts of sand, gravel, and grit? storm events WasteWater Sources & Characteristics: Combined wastewater is defined as sanitary wastewater and stormwater runoff WasteWater Sources & Characteristics: In general, the solids content in wastewater is about 0.1% WasteWater Sources & Characteristics: In general, what is the % of suspended solids in the total amount...

In the activated sludge process, some of the activated sludge must be wasted to... A. Prevent excessive solid buildup B. Prevent clogging of the sludge return line C. Prevent overloading of sludge return pumps D. Increase digester gas production A. Prevent excessive solid buildup The best operating strategy for feeding primary sludge to an anaerobic digester is to feed... A. Several time a day B. Large quantities once or twice a day C. Once a day D. When the volatile solids drop b...

The Activated Sludge Process: A. requires preaeration B. requires Activated Carbon C. is an aerobic biological process. D. Usually precedes primary sedimentation. E. Requires 50% by volume old sludge to work effectively. C. Is an Aerobic biological process A complete mix activated sludge plant has a fast settling sludge and high amounts of pin floc leaving the clarifier. One way to correct this problem is to : A. Increase the RAS Flow B. Reduce Wasting Rates C. Increase dissolve...

domestic wastewater Comes from schools, homes, hospitals, businesses, light industrial facilities. population equivalents 100 lbs wastewater per day, .2 lbs TSS/day, .17 BOD/day industrial wastewater Comes from industries. Compatible wastes can be processed by the plant. Incompatible wastes are toxic to the plant. sanitary wastewater The combined domestic and industrial waste waters from community. storm water Water that runs off roads, parking lots, and other impervious surfaces d...

General Wastewater Treatment: What is the pressure head caused by? Water elevation General Wastewater Treatment: What color should the piping be that contains reclaimed water? purple General Wastewater Treatment: What is the term for the height to which a column of water will rise in a well. piezometric surface General Wastewater Treatment: In general, what is the maximum practical lift of pumps 15-25ft

Clean Water Act 1977 primary legislation concerning water pollution and its regulation. It establishes the NPDES permit system that prohibits point sources from discharging pollutants into waters of the United States. EPA Environmental Protection Agency is an agency of the federal government of the United States charged with protecting human health and the environment by writing and enforcing regulations based on laws passed by Congress NPDES National Pollutant Discharge Elimination Sy...

When Chlorine is combined with water what type of pipe should be used? A. Ductile iron B. Asbestos concrete C. PVC D. Carbon Steel C. PVC A good settling sludge would consist of what type of protozoa? A. Rotifers and nematodes B. Amoebas and Flagellates C. Stalked ciliates and mastagoria D. Free swimmers and stalk ciliates D. Free swimmers and stalk ciliates What is Phenolphylein used for in titration

What is the most common reason for a wastewater to contain intermittent large amounts of sand, gravel, and grit? Storm events Combined wastewater is defined as Sanitary wastewater and stormwater runoff In general, the solids content in wastewater is about 0.1% In general, what is the percentage of suspended solids in the total amount of solids? 30% Generally, the percentage of dissolved solids in the amount of total solids is about 70% Which type of organisms would most probably ...

When organic wastes are discharged to receiving waters, O2 is depleted by _____. bacteria Hydrogen sulfide gives off an odor similar to____. rotten eggs 3 diseases potentially carried by wastewater are _____. typhoid fever, disentery, cholera Immediate first aid for butrns is to ____. flood with cold water What most likely causes an electic motor failure? mopisture What mixed liquor characteristics indicate a healthy activated sludge process? brown color, frothy appearance, and m...

When organic wastes are discharged to receiving waters, O2 is depleted by _____. bacteria Hydrogen sulfide gives off an odor similar to____. rotten eggs 3 diseases potentially carried by wastewater are _____. typhoid fever, disentery, cholera Immediate first aid for butrns is to ____. flood with cold water What most likely causes an electic motor failure? mopisture What mixed liquor characteristics indicate a healthy activated sludge process? brown color, frothy appearance, and m...

The first step the maintenance staff should take in properly locking and tagging out a piece of equipment is to... a) alert the operator on duty b) turn the equipment off at the motor control center (MCC) c) pull the switch on the electrical panel to "OFF" d) fill out the tags a) alert the operator on duty Always alert the operator on duty before shutting down any equipment so as to prevent the possibility of harming personnel or affecting process performance as a result of th...

What is the typical BOD removal efficiency in a primary clarifier? A) 10 to 15% B) 40 to 60% C) 20 to 50% D) 95 to 99% C) 20 to 50% (v.1 pg 129) What does the "F" in F/M ratio represent? A) The microorganism population in the aeration tank B) The amount of filamentous bacteria in the activated sludge process C) The MLVSS in the aeration tank D) The food for the microorganisms flowing into the aeration tank, in lbs/day D) The food for the microorganisms flowing into the aeration...

What is the methane content in a properly operation anaerobic digester? A) 30 to 35% by volume B) 1 to 2% by volume C) 65 to 70% by volume D) 15 to 20% by volume C) 65 to 70% by volume (v.2 pg 158) What will the addition of chlorine gas do to the pH of wastewater? A) Moderately increase pH B) pH will not be affected C) Significantly increase the pH D) Decrease the pH D) Decrease the pH (v.1 pg 349-350) What is the purpose of a Parshall flume?

WWTP Wastewater Treatment Plant A community or municipal facility designed according to state and federal regulations and permitted for the purposes of purifying soiled water or wastewater which is the water and solids from a community including residential, commercial and often industrial entities. In the United States, WWTPs are closely regulated to preserve and protect public health by the US EPA and state primacy. wastewater The spent or used water of a community or industry contai...