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Yunqin Lin,Jianjin Liang,Shubin Wu,Baohan Wang 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.1
The study focused on the mesophilic anaerobic hydrogen production from PPS (pulp and paper sludge)and FW (food waste) pretreated by NaOH or H2SO4, and the subsequent thermophilic anaerobic methane production with the effluent in a two-stage process. The maximum hydrogen yield (78.35 mL gˉ1 VSfed)which was 50.21% higher than that of CK, was achieved when 10 g NaOH/100 g TSsubstrate was used. However, the maximum methane yield (383.8 mL gˉ1 VSfed) was obtained in CK as well as 64% SCOD removal efficiency was achieved. In short, NaOH/H2SO4 pretreatment was suitable to enhance the hydrogen production.
Huanjia Lin,Yunqin Lin,Dehan Wang,Yuwan Pang,Fabao Zhang,Shuanhu Tan 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.58 No.-
This paper focused on the ammonium removal from the digested effluent of swine wastewater (DESW) via MAP precipitation using the residue from magnesium-hydroxide flue gas desulfurization (MFGD) process as a Mg source. The MAP precipitation was proceeded in a 500-mL beaker with a magnetic stirrer. It was found that around 60% of ammonium in the DESW was removed at pH 9.5, HRT 10 min and the P:Mg:N molar ratio of 0.6:0.7:1. The NH4+ concentration (183.2 mg/L) in the DESW after MAP precipitation was lower than 200 mg L−1, being alternative for the downstream biological process. A low content of PO43− (3.64 mg L−1) and a high concentration of Mg2+ (67.17 mg L−1) were also observed in the solution. The main composition of the precipitate was proved to be MAP via XRD and SEM-EDX analysis. Besides, the total chemical cost was saved by 29.17% using the MFGD residue as a Mg source instead of the commercial MgCl2·6H2O. Hence, reusing MFGD residue as a Mg source to remove ammonium from the DESW was feasible with cost saving, resource recovery and environment protection.
Production of corrugating medium paper with secondary fibers from digested deinking sludge
Dexing Yin,Yunqin Lin,Zhihuan Chen,Jialiang Qiao,Min Xiao,Dehan Wang 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.37 No.-
This work focused on developing an approach to reusing digested deinking sludge for corrugatingmedium paper manufacture by recycling secondary fibers. The fiber content in the digested deinkingsludge (DDS) was around 41.87%, and the main proportion of fibers (87.6%) was subject to secondaryfines with lengths less than 0.2 mm. The qualified corrugating medium paper was obtained when thesecondary fiber load from DDS was equal or less than 30%. Corrugating medium paper manufactured byadding DDS could maximize reuse and recycling of deinking sludge via methane and papermakingmaterial production, and reduce the environmental pollution as well.