Wastewater sludge is considered a valuable source of nutrients and energy. Freeze/thaw treatment is an efficient dewatering method for wastewater sludge management in First Nation communities located in cold climate conditions. Natural freeze/thaw is a simple, practical and low cost method, which can effectively dewater sludge. The objective of this research is to evaluate dewatering, nutrient recovery and organics separation of wastewater sludge originating from different wastewater treatment processes using freeze/thaw processing. The results of experiments showed the effectiveness of this method in sludge dewaterability and solubilisation of organics and nutrients. The sludge solid content increased by approximately 10-fold after treatment. It was effective in solubilisation of about 15.2%, 33.5% and 21.5% of total nitrogen, total phosphorus and total chemical oxygen demand to soluble one, respectively for the non-BNR sludge. However, anaerobic digestion of the solid cake post freeze/thaw treatment did not show enhanced methane yield compared with fresh sludge. / February 2017
| Identifer | oai:union.ndltd.org:MANITOBA/oai:mspace.lib.umanitoba.ca:1993/32095 |
| Date | 03 February 2017 |
| Creators | Sabri, Mahrooz |
| Contributors | Cicek, Nazim (Biosystems Engineering) Yuan, Qiuyan (Civil Engineering), Sri Ranjan, Ramanathan (Biosystems Engineering) Zvomuya, Francis (Soil Science) |
| Source Sets | University of Manitoba Canada |
| Detected Language | English |
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