The main innovations introduced by Amendment No. 2 to the Code of Practice CP 32.13330.2018 «Sewerage. Pipelines and Wastewater Treatment Plants»

Summary

The main prerequisites for the development of Amendment No. 2 to CP 32.13330.2018, and the tasks facing this work are described. The main innovations introduced by Amendment No. 2 are considered. The principles of synchronization of the system of engineering regulation of wastewater treatment processes with environmental regulation of discharges; clarification of the provisions for determining the estimated wastewater inflows; additions to the subsection on drain stations are described. The main additions and clarifications in terms of wastewater and sludge treatment technologies are described and justified (Chapter 9 of the Code of Practice), namely: updated requirements for intrahour safety factors while calculating channels and flumes; supplemented requirements for reliability in the design of channels of bar screen buildings and the data for calculating the amount of screenings depending on bar spacing; specified conditions for the use of sewage regulators; requirements for the calculation of primary settling tanks, aeration tanks, secondary settling tanks; recommendations for the removal of phosphorus; requirements for the redundancy of sludge dewatering equipment in case of the lack of spare sludge beds; introduced formulas for calculating the pollution of primary effluent; recommendations for sludge acidification from primary settling tanks; requirements for the redundancy of submersible electromechanical equipment of aeration tanks and for the regulation of sludge discharge from secondary settling tanks; detailed recommendations on the use of filtration beds for receiving effluents; the limits of applying mandatory dechlorination while using chlorine and the allowability of using prefabricated units.

Key words

treatment facilities , sewerage , screens , phosphorus elimination , set of rules , dechlorination , primary and secondary settling tanks , pipelines and wastewater treatment plants , municipal (mixed) wastewater , estimated inflow , sewage regulators , drain stations , calculations , aeration tanks , equipment redundancy , sludge acidification , filtration beds , prefabricated units

Obtaining design data for the calculation of wastewater treatment facilities for communities in accordance with Amendment No. 2 of CP 32.13330.2018

Summary

The main innovations introduced by Amendment No. 2 to CP 32.13330.2018 «Sewerage. Pipelines and Wastewater Treatment Plants» with regard to obtaining design data for calculating wastewater treatment facilities for communities are considered. The main content of the new D Appendix as part of this Code of Practice, dedicated to this issue, is outlined, where the instructions are differentiated on obtaining design data for calculations provided the primary design data is sufficient, or insufficient. In particular, the specified requirements for taking into account predicted changes in the drainage sewer territory, determining the daily and hourly coefficients of unevenness, and determining the calculated concentrations of pollutants are described.

Key words

treatment facilities , sewerage , set of rules , pipelines and wastewater treatment plants , municipal (mixed) wastewater , municipal (mixed) wastewater , verification , relevant data , wastewater inflow , loadings , pollution concentrations , wastewater temperature