摘要
畜禽粪水已成为上海市郊的主要污染源。利用畜禽粪水与沼液作蔬菜地下渗灌施肥，有灌溉、施肥、污水处理、防止土壤次生盐渍化、不占地、节肥省本、生产洁净蔬菜等综合功能。研究了畜禽粪水与沼液蔬菜渗灌施肥的基本条件（ＣＯＤｃｒ＜２０００ｍｇ／Ｌ）、管材管径（ＤＮ５５ｍｍ）、间距（２ｍ左右）、深度（０．４０ｍ）、滤材（砻糠）及厚度（０．０５ｍ）、有压渗灌等成套应用技术，渗灌增产２０．９±７．３％，增收１９６５６．０±９９６元人民币／ｈｍ２·ａ，土壤自净去除率ＣＯＤｃｒ为８８．０±５．０％，排放水ＣＯＤｃｒ为１３０．５±６５．８ｍｇ／Ｌ，对地面水、地下水基本无影响。故经济、环境、社会、生态效益俱优。
Excreta from domestic animal farms have become one kind of major pollution sources in Shanghai suburbs. Utilization of animal sewage and waste liquid from biogas pits in irrigation of vegetable fields by underground permeation had multiple functions and advantages,such as functions of irrigation,fertilization,sewage treatment and protection of soil against secondary salinization; and advantages of economizing land space, fertilizer and cost,and of producing sanitary vegetables. The comprehensive technique using domestic animal sewage and waste liquid from biogas pits to irrigate vegetable fields by underground permeation was studied. The main suitable conditions of the technique such as CODcr(2 000mg/L),irrigating pipe, its diametre (DN 55mm),interspace (about 2m) and depth (0.05mm), permeable material(rice chaff)and its thickness (0. 05mm)and pressure permeating irrigation were determined. Application of this technique resulted in yield increase of 20. 9±7. 3% and income increase of 19 656±996 yuan/hm2. a. The CODcr removal rate by soil was 88. 0±5. 0%,CODcr of discharge liquid was 130. 5± 65. 8ing/L. No harmful effects on surface water and underground water were found. So the technique had better economic, environmental and social effects.
出处
《上海农业学报》
CSCD
1994年第A00期61-66,共6页
Acta Agriculturae Shanghai
关键词
畜禽粪水
沼液
渗灌
蔬菜
施肥
Domestic animal sewage
Solid-liquid separation of waste liquid from biogas pits
Permeating irrigation
Interspace
Natural purification by soil
