Kokneses DzKSPPU Wastewater Treatment Plant, Koknese, Latvia

Kokneses DzKSPPU is a wastewater treatment plant located in Koknese, Aizkraukles novads, Latvia. The plant served a population of 294 and was designed with a capacity of 2500 units, though it is now closed. It provided secondary treatment, which is the standard level required under the EU Urban Waste Water Treatment Directive for small agglomerations. As a secondary treatment facility, the plant would have removed organic matter and suspended solids before discharge. The EU directive mandates secondary treatment for all agglomerations above 2000 population equivalent, but smaller plants like this one may have been subject to national regulations. The plant's discharge volume was 56.11 units, indicating a relatively low flow. Koknese is located on the Daugava River, which flows into the Baltic Sea via the Gulf of Riga. The Daugava is an important river for Latvia, supporting diverse aquatic life and providing water for various uses. The plant's closure suggests that wastewater treatment in the area may have been consolidated or upgraded.

Koknese lies on the Daugava River, which flows through Latvia and into the Baltic Sea. The Daugava basin supports a variety of fish species and is an important migratory corridor for aquatic life. The plant's discharge, even at secondary treatment level, would have contributed nutrients to the river, potentially affecting downstream ecosystems. The Baltic Sea is sensitive to eutrophication, so nutrient removal is a key concern for all discharges in the region.