3El Boushy AR,Klaassen GJ,Ketelaars EH. Biological conversion of poultry and animal waste to a feedstuff for poultry. Poultry Adviser[POULT. ADVIS. ],1986.
4Dale CJ. Submerged biotower technology for tertiary nitrification of poultry abattoir wastewater. Journal of the Chartered Institution of Water and Environmental Management, Feb 2000.
5A Zaidi,The use Of micro/ultrafiltration for the removal of oil and suspended solids from oilfield brines, Wat Sci Tech Vol. 25,No. 10,pp: 163-176,1992.