New Publications:
Gunkel, G. & Michels, U (2019) Das neue Arbeitsblatt W 271 – Herausforderungen und Erfahrungen aus der Praxis. 33. Oldenburger Rohrleitungsforum 2019, 118-127, Vulkan Verlag, ISBN 978-3-8027-2885-3.
Michels, u. & Gunkel, G. (2019) Verminderung von Kleintieren in der Trinkwasserverteilung. 33. Oldenburger Rohrleitungsforum 2019, 128-139, Vulkan Verlag, ISBN 978-3-8027-2885-3.
Gunkel, G., Michels, U. & Scheideler, M. (2018) Erfahrungen und Effizienz der Rohrnetzpflege bei Anwendung des CO2-Spülverfahrens - Vorkommen der Wasserasseln in Trinkwassernetzen. gwf Wasser Abwasser, 12/2018, 77-84.
Gunkel, G., Michels, U. & Scheideler, M. (2018) Kleintiere in der Trinkwasserverteilung – Vorkommen und Anwendung des Arbeitsblatts W 271. Teil 1. Makroinvertebraten. energie wasser praxis 11, 20-27.
Small animals (water lices, Asellus aquaticus) in drinking water networks – occurrence and evaluation
In drinking water distribution networks, a significant number of small animals (invertebrates) up to a mass development can occur. Besides not visible protozoan (amoebas) and small metazoan (nematodes, copepods, water flies), visible macro-invertebrates such as water lice, oligochaetes and chironomids are common. These macro-invertebrates lead to an aesthetic impact on drinking water supply and a hygienic impact is caused by faeces of the animals as well as by dead animals.
The observation of small animals (invertebrates) in drinking water networks leads to a spontaneous rejection of the product `drinking water´. But some facts should be considered:
New methods for analysis and treatment of drinking water networks have been developed:
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