Secondary Treatment
The goal of this process is to remove slowly biodegradable particulate COD from the influent stream.
What is primary treatment?
Combining organic compounds with aerobic bacteria creates this type of pollution.
What is oxygen demand pollution?
This equipment removes settleable particulate BOD from influent stream; allows readily biodegradable soluble BOD to pass through to forward flow; and aids in influent scum removal.
What are primary clarifiers?
The mixture of raw or settled wastewater and activated sludge.
What is Mixed Liquor?
The main benefit of thickening is an increase in....
What is solids?
Solids that are filterable are called _______________.
What are total suspended solids (TSS)?
An ion with a positive charge is...
What is a cation?
The process by which particle charges are neutralized in chemically enhanced clarification.
What is coagulation?
The bacterial community responsible for wastewater treatment.
What is activated sludge?
The float solids from the DAFT are sent to _____.
What is digestion?
The biological process of organisms obtaining energy.
What is cellular respiration?
This parameter provides an estimation of total dissolved solids (TDS).
What is Conductivity?
A vortex grit tank uses ______ force.
What is Centrifugal?
This equipment's major drawback is a high oxygen demand at the front of the basin.
What is a Plug Flow Reactor?
Polymers act as _____ in WRRF sludges.
What are coagulants?
The biological autotrophic reaction that oxidizes ammonia to nitrate.
What is nitrification?
Ion that causes corrosion, high TDS, inhibited plant growth, and can be introduced to water from rock salt on roads.
What is Chloride?
These systems rely on individual lift stations at each connection to pump wastewater into a shared forcemain, which ultimately pumps into the larger central wastewater collection system leading to a regional treatment plant.
What are low pressure sewer systems?
For this process, the RAS is aerated in a stabilization tank prior to mixing with primary effluent.
What is contact stabilization?
_____ is used to determine the optimal polymer dose to use to condition a specific sludge.
What is jar testing?
Nitrification is a two-step reaction where _______ is produced by Nitrosomonus in the first step and ______ is produced by Nitrobacter in the second step.
What is Nitrite and Nitrate?
This ionic compound is a cause of odors in water and wastewater and is not good for anaerobic digesters.
What is sulfate?
These components are the most likely to be in the sludge at the bottom of a primary clarifier.
What are settleable solids?
For this process, the flow is split throughout the reactor instead of all up front.
What is a Step Feed process?
A component on most emulsion polymer makeup systems that required frequent cleaning is the ____________.
What is a neat polymer check valve?