Open AccessFoaming Characteristics of the Food-Industry Biological Wastewater Treatment Plant
Author(s) -
Samwel Victor Manyele
Publication year - 2007
Publication title -
tanzania journal of engineering and technology/tanzania journal of engeering and technology
Language(s) - English
Resource type - Journals
eISSN - 1821-536X
pISSN - 2619-8789
DOI - 10.52339/tjet.v30i1.393
Subject(s) - aeration , wastewater , pulp and paper industry , fluidization , dilution , sewage treatment , materials science , bioreactor , pilot plant , environmental science , waste management , fluidized bed , chemistry , environmental engineering , engineering , physics , thermodynamics , organic chemistry
Intensive foaming observed during aeration of the aerobic food industry wastewater treatment plant is presented. Thisstudy was conducted to establish the foaming characteristics using a pilot three-phase fluidized bed bioreactor (TPFBB).A fluidization column (0.2 m i.d. and 6 m high) was used. The TPFBB was loaded with variable masses of novel biomasssupport particles (BSP). Wastewater samples collected from a plant processing both vegetable oil (VOPWW) and soap(SPWW) were immediately introduced in the TPFBB for aeration. The characteristics studied include: variation of foamvolume with time, foam multiplicity, foaming and foam collapse rates. The SPWW produced excessive foam volumes at ahigher rate and higher foam multiplicity compared to VOPWW. Dilution, increasing aeration rate or BSP loading led tohigher foaming rate, which decreased with time. Spraying wastewater at the top of the liquid surface minimized foamingrate.