The use of sewage sludge and horticultural waste to develop artificial soil for plant cultivation in Singapore

Sewage sludge sugarcane trash based compost and synthetic aggregates as peat substitutes in containerized media for crop production

“…Similar effects of composts addition to growth media have been referred to by other researchers [2,6,24,58,60], which were mainly due to the great contribution of nutrients, especially N and P by composts. Sanchez-Monedero et al [61], in experiments using substrates obtained by mixing composts from Table 5 Effects of different substrates on the growth of lettuce.…”

“…The presence of SSC in the media mixture increased the total and exchangeable concentrations of K, Mg and Ca compared to peat control. Many authors have shown the use of sewage sludge generally increases the heavy metal contents in compost [2,24,58]. The presence of high levels of micronutrients or potentially toxic elements in sewage sludge would be a serious constraint for propagating media preparation.…”

Rapid decolorization and mineralization of simulated textile wastewater in a heterogeneous Fenton like system with/without external energy

“…Damage from EDTA pollution includes the possible toxic heavy metal mobilization, extended biological availability to aquatic life and further risk on groundwater and drinking water [3]. It has been demonstrated that most of the industrial chelating agents are not degradable in the commonly used wastewater treatment facilities [2,[4][5][6]. Kari and Giger [7] reported that considerable amounts of EDTA pass through wastewater treatment facilities in the form of Fe III EDTA.…”

Effect of inoculation in composting processes: Modifications in lignocellulosic fraction

“…Thus, legislation on this matter dictates the gradual abandonment of these methods in favour of applying alternative treatments such as recycling, composting or biogas production (Directive 1999/31/EC). All of these treatments are adapted to the demands established by law, since they reduce the volume of wastes as well as their hazardous nature, while at the same time generating a worthwhile product (Ilyin et al, 2004;Parawira et al, 2004;Stabnikova et al, 2005).…”