Maize showed significantly higher wastewater N-use efficiency compared to the Chinese cabbage.
Nhapi et al. (2006) provide very detailed information on wastewater treatment and wastewater impacts on water resources in Harare; they note that a major problem is very high water use (leading to very high wastewater volumes) in relatively wealthy parts of the city (Tsiko and Togarepi 2012).
When compared to alternative technologies, the DOC system provides high wastewater recovery (>95%), at low energy cost (<90 × 103 J/l (25 Wh/l)), with minimal resupply (<20 kg/year).
The major purpose of this experimental case study was to improve the design, operation, and management of vertical-flow constructed treatment wetlands to secure a high wastewater treatment performance during all seasons.
A joint venture approach for private sector involvement in the wastewater sector was only adopted in provinces with high wastewater treatment charges, such as Beijing, Fujian, Jiangsu, Zhejiang, and Shanghai.
Shallow sewerage is generally employed in areas with higher population densities than that found in Rakheedhoo and, in fact, relies on the high wastewater flows generated by these high population densities for its effective operation.
Mass removal rates and removal rate constants were much higher than reported in other studies probably because of the high-strength wastewater, the high loading rates and the tropical conditions.
The application of fatty substances to enhance the denitrification efficiency of high salinity wastewater with a high content of nitrates seems like a plausible strategy to resolve the above-mentioned issues.
FA2 with high acid concentration and high TOC wastewater was firstly extracted by amine extractant N7301 to recover FA and further treated by RO system.
It is concluded that vertical flow constructed wetland systems have a high capacity to treat high-strength wastewater in tropical climates.
