Producing biogas from agricultural residues generated during phytoremediation process: Possibility, threshold, and challenges

ABSTRACT

In the past decades, a novel strategy has arisen, as required by time, to get a rational production of biogas from contaminated biomass, which may be, on purpose, harvested from contaminated soil phytoremediation process. The present review focuses on the possibility and potential of utilizing the agricultural residues generated during phytoremediation for production of biogas. As a general result of the studies compiled in this review, the harvested biomass can subsequently be utilized for the winning of biogas, and it provides a solution of waste disposal for phytoremediation technology. According to the analysis of previous results, not more than 1 mg/L of cadmium in fermenters shows promoting or at least no inhibitory effect on cumulative biogas yields. This strategy is promising for dealing with both environmental and energy problems in spite of many challenges in the coming future.

KEYWORDS:

• Biomass residues
• phytoremediation
• bioenergy
• biogas
• feedstocks
• environment-friendly
• cost reimbursement
• long-term economic benefit

Funding

This work was funded by the National Special Water Programs (Nos. 2009ZX07210-009, 2015ZX07203-011, and 2015ZX07204-007), Ecological Safety Survey and Assessment of Nansi Lake (2012–2015), Ecological Riverway Artificial Strengthen Key Technology Research and Demonstration Project of Shandong Province (2012–2014, SDHBPJ-ZB-08), and the China Scholarship Council (No. 201406730018).

Additional information

Funding

This work was funded by the National Special Water Programs (Nos. 2009ZX07210-009, 2015ZX07203-011, and 2015ZX07204-007), Ecological Safety Survey and Assessment of Nansi Lake (2012–2015), Ecological Riverway Artificial Strengthen Key Technology Research and Demonstration Project of Shandong Province (2012–2014, SDHBPJ-ZB-08), and the China Scholarship Council (No. 201406730018).