title: Evaluation of the efficiency and throughput of a gamma irradiator treating municipal sewage sludge.
abstract: Sludge Hygienisation Research Irradiator (SHRI) Facility at Vadodara (India) has been disinfecting liquid sewage sludge with (60)Co gamma rays since 1992. At some point, the radiation process was modified from its originally designed closed-loop system to an open-loop system. Dosimetry experiments were performed to estimate absorbed doses to the sludge for different periods of irradiation of a 15m(3) batch in an open-loop irradiation process. The paper reports the dosimetry results and evaluated operational parameters of the irradiator, namely, effective dose rate in the open-loop system, irradiation efficiency, and throughput. Also, the open-loop system and the closed-loop system are compared in terms of the effective dose rate.
authors.affiliation: Radiation Technology Development Division, HIRUP Building, Bhabha Atomic Research Centre, Trombay, Mumbai, India. bennypg@yahoo.com
authors.forename: P G
authors.initials: PG
authors.lastname: Benny
authors.forename: M R
authors.initials: MR
authors.lastname: Shah
authors.forename: S
authors.initials: S
authors.lastname: Sabharwal
mesh_terms: D003037:Cobalt Radioisotopes; D004203:Disinfection / Q000379:methods*; D005720:Gamma Rays; D012722:Sewage / Q000382:microbiology*; D014865:Waste Disposal, Fluid / Q000379:methods*
chemical_list: D003037:Cobalt Radioisotopes; D012722:Sewage