Municipal sewage sludge compost promotes Mangifera persiciforma tree growth with no risk of heavy metal contamination of soil

Abstract

Application of sewage sludge compost (SSC) as a fertilizer on landscaping provides a potential way for the effective disposal of sludge. However, the response of landscape trees to SSC application and the impacts of heavy metals from SSC on soil are poorly understood. We conducted a pot experiment to investigate the effects of SSC addition on Mangifera persiciforma growth and quantified its uptake of heavy metals from SSC by setting five treatments with mass ratios of SSC to lateritic soil as 0%:100% (CK), 15%:85% (S15), 30%:70% (S30), 60%:40% (S60), and 100%:0% (S100). As expected, the fertility and heavy metal concentrations (Cu, Zn, Pb and Cd) in substrate significantly increased with SSC addition. The best performance in terms of plant height, ground diameter, biomass and N, P, K uptake were found in S30, implying a reasonable amount of SSC could benefit the growth of M. persiciforma. The concentrations of Cu, Pb and Cd in S30 were insignificantly different from CK after harvest, indicating that M. persiciforma reduced the risk of heavy metal contamination of soil arising from SSC application. This study suggests that a reasonable rate of SSC addition can enhance M. persiciforma growth without causing the contamination of landscaping soil by heavy metals.

Nutrient content in wheat grain and straw using sludge and compost from a wastewater treatment plant as a fertiliser

“…A final factor to take into account is crop type. Much research has been conducted on the application of WWTP using different herbaceous and woody crops . Another alternative use of the waste from WWTPs is its exploitation as a fertiliser for energy plants .…”

“…Much research has been conducted on the application of WWTP using different herbaceous and woody crops. 12,13 Another alternative use of the waste from WWTPs is its exploitation as a fertiliser for energy plants. 14 Because sewage sludge can harm the environment when deposited directly on soil as a result of of its fermentative capacity, 9 composting is one of the most appropriate methods for managing sewage sludge.…”

Impact of Irradiated Compost on Growth and Nutritional Status of Valencia Orange Grown in the Desert Areas

“…Organic fertilizers had a powerful fertilizing effect through reduction of soil bulk density and increased pH, water-holding capacity by increasing capillary capacity and aeration porosity with increasing rates of application thus improving soil properties. In addition, they enhanced soil organic matter accumulation and available nutrient elements concentration [35][36][37]. Application of compost, one of common organic matter, markedly increased water moisture thus improves soil physical properties [38,39].…”

Experimental Study of Moisture Content Effect on Geotechnical Properties of Solidified Municipal Sludge

“…e country's municipal sewage sludge output is expected to exceed 60 million tons by 2020. e huge amount of sludge will cause substantial environmental problems [1][2][3], and thus, sludge stock absorption through various disposal methods should be urgently considered. e municipal sludge is o en solidi ed with materials and then used as land ll cover materials [4,5], subgrade llers [6], garden soil [7], and brick-making materials [8] or land lled [9].…”