LIU Ji-wei,JIANG Yan-hang,AIHEMAITI Aikelaimu,et al.Migration and Transformation of Chloride during Biohydrolysis of Kitchen Wastes[J].China Water & Wastewater,2021,37(23 23):52-56.
Migration and Transformation of Chloride during Biohydrolysis of Kitchen Wastes
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
23 23
Page:
52-56
Column:
Date of publication:
2021-12-01
- Keywords:
- kitchen waste; mechanical biohydrolysis; sodium chloride; migration and transformation; hydrolysis residues; hydrolysate
- Abstract:
- The present study aims to solve the problem of recycling and utilization of hydrolysis residues and hydrolysate produced by mechanical biohydrolysis of kitchen wastes. The effects of sodium chloride on production of volatile fatty acids (VFAs), soluble COD (SCOD) and ammonia nitrogen in the process of mechanical biohydrolysis of kitchen wastes were explored. The change, migration and transformation characteristics of chloride ions in hydrolysis residues and hydrolysate were analyzed. The effects of water leaching on the contents of chloride ions and nutrient elements such as potassium and phosphorus in hydrolysis residues were investigated. In the process of mechanical biohydrolysis of kitchen wastes, the presence of sodium chloride reduced the production of VFAs, SCOD and ammonia nitrogen by 2.56 mg/L, 22.62 g/L and 137.50 mg/L, respectively. The main reason was that sodium chloride inhibited the decomposition of kitchen wastes by microorganisms. With the increase of biohydrolysis time, the chloride ion concentration gradually decreased and eventually reached equilibrium. In the process of water leaching of the hydrolysis residues, the concentration of chlorine ion gradually decreased, which met the requirements of the concentration of chloride ions in organic fertilizer on the market. However, water leaching had little effect on contents of nutrient elements such as phosphorus and potassium in hydrolysis residues.
Last Update:
2021-12-01