An integrated algal-bacterial system for the bio-conversion of wheat bran and treatment of rural domestic effluent. (1st November 2017)

• Record Type: Journal Article
• Authors: He, Yaqiang; Wang, Ruolan; Liviu, Giurgiulescu; Lu, Qian
• Is Part Of: Journal of cleaner production. Volume 165(2017)
• Page Start: 458
• Page End: 467
• Publication Date: 2017-11-01
• Subjects: Chlorella vulgaris -- Bacillus sp. -- Wheat bran -- Domestic effluent -- Water for irrigation; Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2017.07.119
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: Environmental pollution caused by wheat bran and domestic effluent are two common problems in many rural areas. This work combines the digestion of wheat bran and the treatment of rural domestic effluent by developing a microbiological system consisting of Chlorella vulgaris and Bacillus sp., which was isolated from wheat bran fermentation and identified by molecular technique. Bacillus sp. converts solid organics of wheat bran into soluble nutrients which are essential to algae growth. The addition of digested wheat bran balances the nutrients profile of rural domestic effluent and increases the biomass yield of algae. After treatment, the rural domestic effluent was converted into farmland irrigation water and valuable algal biomass was produced. In practice, the results of this work may be useful in reconstructing domestic wastewater treatment systems in some rural areas. Highlights: A bacterial strain was isolated and identified as Bacillus sp. Bacillus sp. released nutrients, particularly organic carbon, from wheat bran. Supplement of organic carbon in domestic effluent increased the growth rate of algae. Rural domestic effluent after treatment met the requirements of irrigation water.