Advanced Water Management Centre

AWMC Seminar Program: Camilla West & Dr Andrew Ward

Integrated fuzzy risk assessment for residential recycled water schemes (Camilla)

Abstract: Investment in urban water infrastructure is subject to a plethora of risks arising from physical, political, social, operational, economic and legal sources. In the current economic climate, water utilities need to make efficient and prudent decisions by carefully considering the risk of investment in water infrastructure. Classical risk assessment methods comprise the statistical analysis of quantitative data (quantitative risk analysis), which is often constrained by data quantity or quality, or the linguistic definition of likelihood and consequence of risk (qualitative risk analysis), which is subject to uncertainty, ambiguity and bias. Fuzzy set theory addresses data impreciseness, uncertainty and ambiguity by enabling linguistic descriptions to be modelled mathematically. An integrated fuzzy risk assessment model has been developed and utilised to assess the risk of investment in residential recycled water schemes. The outcomes of the risk assessment indicate that the risk of investment in residential recycled water projects is moderate to high, with critical risk sources comprising socio-political, organisational, financial/economic and physical risks.

 

Title: High salinity anaerobic digestion of marine microalgae (Andrew)

Abstract: This presentation will cover work undertaken during my PhD and my previous employment experience with wastewater remediation. Prior to starting my PhD I worked for the South Australian Research and Development Institute (SARDI) where I worked on the Integrated Biosystems project (IBS). This IBS project investigated the remediation of food processing and high intensity agricultural wastewater utilising an integrated system to produce methane biogas microalgae and zooplankton for fish meal production whilst simultaneously producing clean water for on farm reuse.

Following the IBS project I started my PhD where I investigated the anaerobic digestion of High salinity marine microalgae, as part of a microalgae liquid biofuels project. Inhibition of methanogen bacteria caused by the increased salinity associated with marine sourced biomass was investigated and a high salinity anaerobic digestion microbial community was developed. Further technical restraints associated with microalgae including low concentration of digestible biodegradable substrate, recalcitrant substrate constituents, cell wall degradability, low carbon to nitrogen ratio, ammonia toxicity and co-digestion were also investigated.

Anaerobic digestion culminating in methane fermentation improves the economic viability of microalgae liquid biofuel production and presents an opportunity for power generation from micro algal biomass including wastewater-derived microalgae. From a life-cycle perspective, when both biofuels production and anaerobic digestion are integrated and operated simultaneously; the benefits to microalgae biofuel production and wastewater treatment derived energy production are significantly increased.

Host: Advanced Water Management Centre
Event Details
Date & Time: 
Friday, 26 February 2016
9am - 10am
Venue: AIBN Building 75, Level 1 Seminar Room

Event Contact: awmcseminars@awmc.uq.edu.au