Effect of phosphates on water treatment : phase III. effects of phosphates on coagulation and sedimentation of turbid waters /

"Final report for the period June 15, 1955 to September 15, 1957 for American Association of Soap and Glycerine Producers."

Effects of waste water disposal, Fruitvale Oil Field, Kern County: cooperative water quality investigation, conducted by U.S. Dept. of the Interior, Geological Survey and the Dept. of Water Resources.

At head of title: State of California, the Resources Agency of California, Dept. of Water Resources.

Application of selected industrial engineering techniques to wastewater treatment plants,

"EPA-R2-73-176."

The operation of water filtration plants of the mechanical gravity type.

Originally issued in 1923, prepared by George F. Catlett, as Special bulletin no. 211 of the North Carolina Board of Health, Bureau of Engineering and Inspection.

An economic analysis of effluent standards for BOD, ammonia, total suspended solids, and disinfection : case study of a modern treatment plant /

"Project no. 80.160."

Annual report on hazardous waste, generation, treatment, storage and disposal.

Mode of access: Internet.

Directory of RCRA hazardous waste generators, treatment, storage, and disposal facilities : based on a summary of 1982 reports.

Generator 82 annual report; alphabetic list of hazardous waste generators -- Facility 82 annual report; alphabetic list of hazardous waste facilities.

Report to the Illinois General Assembly on the issue of expanding public water supply loan eligibility to privately owned community water supplies /

"August 1998."

Efficient investments in wastewater treatment plants.

Item 1005-C

Water supply, water treatment [microform].

"16 September 1985."

Providing solutions for a better tomorrow : a progress report on U.S. EPA's drinking water treatment technology demonstrations in Ecuador, Mexico and China /

Shipping list no.: 99-0007-P

Municipal wastewater treatment construction grants program : hearings before the Subcommittee on Environmental Pollution of the Committee on Environment and Public Works, United States Senate, Ninety-seventh Congress, first session, on S. 975 ... and S. 1274.

"Serial no. 97-H17."

Operation and control of sewage treatment plants.

Mode of access: Internet.

Microbial quantification in activated sludge: the hits and misses

Since the implementation of the activated sludge process for treating wastewater, there has been a reliance on chemical and physical parameters to monitor the system. However, in biological nutrient removal (BNR) processes, the microorganisms responsible for some of the transformations should be used to monitor the processes with the overall goal to achieve better treatment performance. The development of in situ identification and rapid quantification techniques for key microorganisms involved in BNR are required to achieve this goal. This study explored the quantification of Nitrospira, a key organism in the oxidation of nitrite to nitrate in BNR. Two molecular genetic microbial quantification techniques were evaluated: real-time polymerase chain reaction (PCR) and fluorescence in situ hybridisation (FISH) followed by digital image analysis. A correlation between the Nitrospira quantitative data and the nitrate production rate, determined in batch tests, was attempted. The disadvantages and advantages of both methods will be discussed.

Challenges for simultaneous nitrification, denitrification, and phosphorus removal in microbial aggregates: mass transfer limitation and nitrous oxide production

The microbial community composition and activity was investigated in aggregates from a lab-scale bioreactor, in which nitrification, denitrification and phosphorus removal occurred simultaneously. The biomass was highly enriched for polyphosphate accumulating organisms facilitating complete removal of phosphorus from the bulk liquid; however, some inorganic nitrogen still remained at the end of the reactor cycle. This was ascribed to incomplete coupling of nitrification and denitrification causing NO3- accumulation. After 2 h of aeration, denitrification was dependent on the activity of nitrifying bacteria facilitating the formation of anoxic zones in the aggregates; hence, denitrification could not occur without simultaneous nitrification towards the end of the reactor cycle. Nitrous oxide was identified as a product of denitrification, when based on stored PHA as carbon source. This observation is of critical importance to the outlook of applying PHA-driven denitrification in activated sludge processes. (c) 2004 Federation of European Microbiological Societies. Published by Elsevier B.V. All rights reserved.