Agricultural utilization of biosolids: A review on potential effects on soil and plant grown.
Environmental and economic implications linked with the proper ecofriendly disposal of modern day wastes, has made it essential to come up with alternative waste management practices that reduce the environmental pressures resulting from unwise disposal of such wastes. Urban wastes like biosolids are loaded with essential plant nutrients. In this view, agricultural use of biosolids would enable recycling of these nutrients and could be a sustainable approach towards management of this hugely generated waste. Therefore biosolids i.e. sewage sludge can serve as an important resource for agricultural utilization. Biosolids are characterized by the occurrence of beneficial plant nutrients (essential elements and micro and macronutrients) which can make help them to work as an effective soil amendment, thereby minimizing the reliance on chemical fertilizers. However, biosolids might contain toxic heavy metals that may limit its usage in the cropland. Heavy metals at higher concentration than the permissible limits may lead to food chain contamination and have fatal consequences. Biosolids amendment in soil can improve physical and nutrient property of soil depending on the quantity and portion of the mixture. Hence, biosolids can be a promising soil ameliorating supplement to increase plant productivity, reduce bioavailability of heavy metals and also lead to effective waste management.
Institute of Environment and Sustainable Development, Banaras Hindu University, Varanasi, India.
Bhavisha
B
Sharma
Laboratory of Applied Stress Biology, Department of Botany, University of Gour Banga, Malda 732 103, West Bengal, India. Electronic address: abhijitbhu@gmail.com.
Abhijit
A
Sarkar
Institute of Environment and Sustainable Development, Banaras Hindu University, Varanasi, India.
Pooja
P
Singh
Institute of Environment and Sustainable Development, Banaras Hindu University, Varanasi, India; Department of Civil Engineering, University of Nebraska Lincoln, Lincoln, USA. Electronic address: rajeevprataps@gmail.com.
Rajeev Pratap
RP
Singh
D000383:Agriculture; D005308:Fertilizers; D019216:Metals, Heavy; D059027:Recycling; D012722:Sewage; D012987:Soil; D012989:Soil Pollutants; D018505:Waste Management
D005308:Fertilizers; D019216:Metals, Heavy; D012722:Sewage; D012987:Soil; D012989:Soil Pollutants
Agricultural amendments; Biosolids; Heavy metals; Solid waste management