On-site treatment of a motorway service area wastewater using a package sequencing batch reactor (SBR).
A sequencing batch reactor (SBR) treating the effluent of a motorway service station in the south of England situated on a major tourist route was investigated. Wastewater from the kitchens, toilets and washrooms facilities was collected from the areas on each side of the motorway for treatment on-site. The SBR was designed for a population equivalent (p.e.) of 500, assuming an average flow of 100 m3/d, influent biochemical oxygen demand (BOD) of 300 mg/l, and influent suspended solids (SS) of 300 mg/l. Influent monitoring over 8 weeks revealed that the average flow was only 65 m3/d and the average influent BOD and SS were 480 mg/l and 473 mg/l respectively. This corresponded to a high sludge loading rate (F:M) of 0.42 d(-1) which accounted for poor performance. Therefore the cycle times were extended from 6 h to 7 h and effluent BOD improved from 79 to 27 mg/l.
Del Solar
J
J
School of Water Sciences, Cranfield University, Cranfield, Beds MK43 0AL, UK.
Hudson
S
S
Stephenson
T
T
D019149:Bioreactors; D003296:Cooking; D010100:Oxygen / Q000032:analysis / Q000378:metabolism; D011998:Recreation; D014038:Toilet Facilities; D014865:Waste Disposal, Fluid / Q000379:methods*; D018508:Water Purification / Q000379:methods*
D010100:Oxygen