The Sewerage Nuisance (Code of Practice) (Scotland) Order 2006

Enhanced Control Measures

11.  Where the investigation required by paragraph 10(1) identifies particular sources which may have caused the odour nuisance, the appropriate enhanced control measures detailed in sub paragraphs (a) to (g) below shall be included in the review of options to be set out in the OIP, namely–

(a) measures to prevent or minimise septicity or odours in the influent to the WWTW;

(b) measures to prevent or minimise odour release from the inlet works of the WWTW, including a review of emissions from odorous imported wastes, storm conditions and storage and handling of screenings and grit;

(c) measures to prevent or minimise odour release from storm tanks, including a review of the frequency of use, frequency of emptying and efficiency of sludge removal and flushing after use;

(d) measures to prevent or minimise odour release from primary sedimentation tanks including review of methods to minimise excessive turbulence and to minimise the sludge retention time;

(e) measures to prevent or minimise odour release from secondary and tertiary treatment including a review of methods to ensure aerobic conditions are maintained and to minimise the sludge retention time;

(f) measures to prevent or minimise odour release from sludge handling, storage, treatment and thickening and also loading and unloading sludge tanks including a review of containment, enclosure and abatement of emissions; and

(g) measures to prevent or minimise odour release from anaerobic digestion processes, including a review of methods for venting and treatment of off-gas from the digestor.