by University of Aston. Inter-Disciplinary Higher Degrees Scheme in Birmingham .
Written in English
Thesis (Ph.D.) - University of Aston in Birmingham 1981.
The measurement and significance of ATP pools in activated sludge treating coke oven liquors. By A.R. Clarke. Get PDF (22 MB) Abstract. Coke oven liquor is a toxic wastewater produced in large quantities by the Iron and Steel, and Coking Industries, and gives rise to major effluent treatment problems in those industries. Author: A.R. Clarke. The plant referenced in this analysis is a 30 million gallon per day (4, m3/hr) conventional, plug flow, activated sludge system. Flow, loading, and aeration volume are shown in the tables below. The recommended range for the F:M ratio in a conventional activated sludge . There has been numerous attempts to link the ATP content of activated sludge to certain wastewater characteristics or to certain control parameters used in the operation of wastewater treatment plants. Published results vary and result from the use of different ATP extraction and measurement by: 7. EPA/ September TOC, ATP AND RESPIRATION RATE AS CONTROL PARAMETERS FOR THE ACTIVATED SLUDGE PROCESS by Clarence Ortman and Tom Laib City of Hillsboro Sewage Treatment Plant Hillsboro, Oregon and C. S. Zickefoose Stevens, Thompson & Runyan, Inc. Portland, Oregon Grant No. R Project Officer Joseph F. Roesler .
With ATP production and utilization, bacteria cannot reproduce, resulting in an unhealthy population. Aerobic bacteria contain mg ATP/g VSS. A healthy biomass turns this ATP pool over very quickly, typically at a rate of mg ATP/g VSS/ hour, or times the rate of oxygen uptake. implemented in activated sludge wastewater treatment systems by introducing an anaerobic stage at the start of the wastewater treatment lines. High P-removal efficiency, lower operational costs, lower sludge production and the potential recovery of phosphorus have contributed to its application and popularity (Mino et al. Activated Sludge Activated sludge is a type of secondary treatment whose primary role is to remove most of the dissolved solids remaining in the waste stream after. Sludge age is the theoretical length of time a particle of activated sludge stays in the treatment plant, measured in days. In an activated sludge plant, sludge age is the amount (lbs) of mixed liquor suspended solids divided by the suspended solids, or excess cell mass, withdrawn from the system per day (lbs per day of waste activated sludge).
As a sewage and industrial wastewater treatment, it makes use of air and a biological floc composed of bacteria and protozoa. The idea in controlling activated sludge is to keep the wastewater biomass-to-food ratio in balance. To control activated sludge, you need to "have a handle" either on aeration, sludge-wasting or return-sludge flow. Measurement of adenosine 5'-triphosphate (ATP) in coke waste activated sludge can provide a simple method for estimating the levels of viable microbes in the sludge. The concentration of the activated sludge solids and the condition of those biological solids determines the effectiveness of an activated sludge process. Too few or too many organisms in a system will cause operational control problems, reducing treatment plant efficiency and causing an added load on the receiving waters. The presence of bacteria is vital for the wastewater treatment process. In an ideal wastewater treatment plant system, bacteria (about 95%) along with a small portion of fungi and protozoa should form a biological floc that is known as an activated sludge. This is essential for the degradation of organic substances in wastewater.