Year: 1980
Type: article
Abstract: In order to utilize the excess sludge in the waste water from wood industries as composts, sludges were studied to obtain the following results. (1) Either fibre board sludge or paper and pulp excess sludge was mixed with sawdust and animal excrements to give sludge composts of good quality. (2) Several vegetables applied with the sludge and its compost showed both superior growth and yield, as compared with the untreated vegetables. Among treatments examined, the sludge compost mixed with chicken excreta gave the best result. The addition of the primary nutrients of fertilizer to the sludge and its compost afforded much more vegetable growth and yield, as compared with the untreated sludge and its compost. (3) The EC of soil was increased by applying the sludge and its compost. The relationship between the increase of EC and the vegetable growth was noted. (4) From the above results, it was suggested that not only the excess sludge but also its compost was useful for fertilizer.
Authors: Kuretani, Masaru, Umeda, Yutaka
Language: Japanese
Subfield: Soil Science
Domain: Life Sciences
Open Access status: green
OpenAlex ID: W7208025098