Biochar Prepared by Microwave-Assisted Co-Pyrolysis of Sewage Sludge and Cotton Stalk: A Potential Soil Conditioner

Author Contributions

Conceptualization, J.Q.; formal analysis, H.Y.; investigation, J.Q., D.W. and Z.D.; methodology, D.W. and Z.D.; supervision, J.D. and X.B.; writing—original draft, J.Q.; writing—review & editing, J.D. and X.B. All authors have read and agreed to the published version of the manuscript.

Figure 1.
Schematics diagram of microwave assisted auger moving bed.

Figure 1.
Schematics diagram of microwave assisted auger moving bed.

Figure 2.
Yield of biochar at different temperatures and mix ratios (0, 15%, and 30% cotton stalk).

Figure 2.
Yield of biochar at different temperatures and mix ratios (0, 15%, and 30% cotton stalk).

Figure 3.
FTIR spectra of biochar sample (a) SC, (b) 85SC, and (c) 70SC.

Figure 3.
FTIR spectra of biochar sample (a) SC, (b) 85SC, and (c) 70SC.

Figure 4.
XRD spectra for biochar sample (a) SC, (b) 85SC, and (c) 70SC.

Figure 4.
XRD spectra for biochar sample (a) SC, (b) 85SC, and (c) 70SC.

Figure 5.
(a–d) Growth rates of plants in soil with different biochar application ratios.

 

 

Substance aSSSC450SC550%SC650SC75085SC45085SC55085SC65085SC75070SC45070SC55070SC65070SC750Fe2O3% b65.5863.0258.6555.4354.5054.1356.6945.7352.6052.3751.1249.9444.49SO3%20.1115.0815.9018.5717.6816.4415.7121.5118.1417.1118.2018.6620.12P2O5%5.187.938.599.319.477.597.3810.967.938.548.649.2911.02SiO2%2.997.378.658.539.289.499.8111.6210.4510.3511.2211.2612.89Al2O3%0.712.192.552.232.991.852.262.622.441.912.012.382.44TiO2%2.112.021.922.081.571.982.231.951.951.982.021.661.97MgO%0.381.251.701.562.132.382.712.233.272.122.392.252.36CaO%1.521.141.151.211.292.081.601.711.862.122.032.082.04K2O%1.05-0.881.091.102.781.611.681.362.542.372.482.68Cl%0.12—-1.28—0.98—MnO%0.08————SrO%0.08————ZnO%0.07————Cr2O3%0.02————

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Microwave-assisted Co-pyrolysis