Water reuse for irrigation from waste water treatment plants with seasonal varied operation modes

摘要: Irrigation periods are usually limited to vegetation periods. The quality requirements for treated wastewater disposal and reuse different. of water irrigation allows partly the wastewater9s nutrients (N P). Outside period must be disposal, thus nutrient removal is often required in order avoid detrimental effects on receiving surface body. Only treatment plants with different operation modes seasons can realise these requirements. nitrification most sensitive biological process aerobic process. At low temperatures nitrifying bacteria need several weeks re-start full after without NH 4 -removal. Therefore it necessary develop options waste which allow a fast Based theoretical considerations computer simulations activated sludge process, one possibility implementing plant seasonal evaluated.