Stabilised wastewater sludge (biosolids) has beneficial re-use properties but these are limited by the presence of human pathogens. In this study soil amendment with biosolids and storage prior to were examined as disposal treatment options. a trial mixed sandy monitored for 37 weeks. two trials stored in piles 1m high <60 Included monitoring programme tests determine concentrations faecal coliforms, streptococci salmonellae. both trials, indicator organisms salmonellae decreased through an...

In analogy to the well established dependency of microbial reactions on redox potential terminal electron acceptor, activity in a highly active fuel cell electron-accepting electrode (anode) (MFC) is investigated. An acetate-fed, pH-controlled MFC was operated for over 200 days establish anodic biofilm using ferricyanide as catholyte and granular graphite material. From Coulombic efficiency 83% could be recorded by online monitoring current. Our results suggest that (1) Michaelis-Menten...

Poor cathodic oxygen reduction and the detrimental buildup of a pH gradient between anode cathode are major hurdles in development sustainable microbial fuel cells (MFCs). This article describes tests concept that can help overcoming both these limitations, by inverting polarity MFC repeatedly, allowing anodic reactions to occur alternately same half-cell hence neutralizing its respective effects. For simplicity, we studied inversion exclusively one half-cell, maintaining potential at −300...

The disposal of fine bauxite refining residue (red mud) has occupied huge areas land which remain derelict and subject to wind water erosion. major constraints in rehabilitation are the high alkalinity, salinity sodicity red mud. This paper describes a greenhouse study evaluate use waste gypsum as ameliorants for Red mud was amended with at 0, 2, 5 8% (w/w) its effect on growth two grass species, Agropyron elongatum (Tall wheat grass) Cynodon dactylon (Bermuda grass), evaluated. Gypsum...

Organic waste management is a growing issue due to the unsustainable practices of its disposal. Sewage treatment plants are designed treat wastewater produce safe effluent. However, one by-products, sewage sludge which disposed off in landfill or used as fertilizer agricultural operation high pathogens. Sustainability can be achieved by Vermicomposting organic matter involves accelerated cycling nutrients though closed cycle whereby products put productive end use. and vermifiltration...

A novel membraneless bioelectrochemical system termed rotatable contactor (RBEC) was fabricated and evaluated for its ability to recover useful energy (here methane) from a low organic strength wastewater. We studied the operational characteristics of RBEC by operating it as three-electrode electrolysis cell. stack conductive disks (each subdivided into two half disks), similar rotating biological contactors, were rotated with one-half disk immersed in wastewater other gas headspace. By...

Microbiomes of full-scale seawater reverse osmosis membranes are complex and subject to variation within between membrane units. The pre-existing bacterial communities unused before operation have been largely ignored in biofouling studies. This study is novel as were used a critical benchmark for comparison. Fouled biofilm from an array autopsied samples, following 7-year operational life-span desalination plant Western Australia, characterised by 16S rRNA gene metabarcoding using the...

Graphitic carbon nitride (g-C

The poor soil structure and low hydraulic conductivity of fine bauxite refining residue (red mud) from alumina production are the major factors hindering its revegetation. Red mud, disposed by dry stacking-method, was amended with gypsum (38.5 77 t/ha) sewage sludge (38.5, 77, 144 to evaluate their effects on physical properties in a field experiment. Sewage amendment significantly reduced bulk density (25%) particle (9%), increased total porosity red mud (8%). Both contributed increases...

Published national and state reports have revealed that Australia deposits an average of 16 million Mg solid waste into landfills yearly, which approximately 12.6% is comprised food. Being highly biodegradable possessing high energy content, anaerobic digestion offers attractive treatment option alternative to landfilling. The present study attempted identify the theoretical maximum benefit food in with regard recovery diversion from landfills. also assessed scope for process utilize...