Work

Wastewater recovery by ultrafiltration and electrodialysis in the integrated citric acid-methane production process

Year: 2018

Type: article

Abstract: The integrated citric acid-methane production process was developed in previous study to recycle wastewater in citric acid industry. This paper investigated the technical feasibility of wastewater recovery by ultra filtration and electro dialysis in the integrated process. Treated with coagulation, flocculation a nd u ltra fi ltration (2 00 kD ), th e tu rbidity of an aerobic di gestion ef fluent was bel ow 1 NTU. The optimized conditions of electro dialysis operations were applied voltage of 10 V, flow velocity of 2.16 cm/s and concentrate to diluate stream of volume ratio of 1:4. The concentration of Na + and ammonium in diluate of electro dialysis were 46 mg/L and 36 mg/L, respectively. The pH of concentration in electro dialysis was adjusted to 6.5 by HCl and the scale of CaCO 3 was eliminated. Citric acid production with treated anaerobic digestion effluent was comparable to production with deionized water. The experiment further improved the technical feasibility of cleaner production with integrated citric acid-methane production process.

Source: Desalination and Water Treatment

DOI: 10.5004/dwt.2018.22419

Authors: Xian-Feng Su, Jian Xu, Chen Liu, Hong-Jian Zhang, Zhong-GuiMao

Institution: Jiangnan University

Language: English

Topic: Membrane Separation Technologies

Subfield: Water Science and Technology

Field: Environmental Science

Domain: Physical Sciences

SDGs: Clean water and sanitation, Responsible consumption and production

Open Access status: hybrid

Estimated APC paid: $1,000