Open AccessUTILIZATION OF SEWAGE SLUDGE FROM ACID CASEIN PRODUCTION FOR SOIL FERTILIZATION
Author(s) -
Eglė Zuokaitė,
Davidas Ščupakas
Publication year - 2007
Publication title -
journal of environmental engineering and landscape management
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.514
H-Index - 28
eISSN - 1822-4199
pISSN - 1648-6897
DOI - 10.3846/16486897.2007.9636925
Subject(s) - lactuca , sewage sludge , environmental science , fertilizer , lepidium sativum , organic fertilizer , biomass (ecology) , agronomy , biodegradable waste , soil fertility , raw material , sewage , germination , waste management , pulp and paper industry , chemistry , environmental engineering , soil water , biology , engineering , soil science , organic chemistry
Organic biodegradable waste composes a fair part of farm and vital activity waste. The disposal of this waste in municipal waste landfills pollutes the environment and soil. Therefore, the European Union and other countries look for alternatives to manage biodegraded waste. This paper seeks to analyse the properties of sludge that forms in the sewage treatment plants of the acid casein production, examines experience in managing and applying sludge. The results of an experiment show that sewage sludge from the acid casein production is suitable as a soil fertilizer for growing lettuce (Lactuca sativa L.) and garden cress (Lepidium sativum L.). After soil was fertilized with this sludge, the germination of lettuce and garden cress as well as the biomass of experimental alimentary plants increased. A suitable ratio of soil and sludge mixture was determined (for lettuce ‐ 1:1, for garden cress ‐ 3:1). Potassium sulphate which was added to a soil‐sludge mixture improved the values of fertility parameters of alimentary plants.