摘要
水葫芦在我国多个地区泛滥,含水率超过90%,需要就地压滤处理。而由此产生的大量水葫芦压滤液富含纤维素和各种有机物,属于高浓度有机废水,容易造成二次污染,且在目前污水处理技术条件下处理成本较高。通过微生物发酵处理水葫芦压滤液生产单细胞蛋白,可以减少环境污染的同时提高资源的利用率。该试验利用糖化霉菌与酵母混合发酵以提高粗蛋白产量。35℃恒温条件下,当原始COD值为15333.33mg/L时,添加(NH)42SO425.0g/L,先以黑曲霉(Aspergillusniger)发酵40h,然后接种产朊假丝酵母(Candidautilis)酵母发酵32h,菌体回收率可达19.8g/L,COD去除率达到43.65%;当原始COD值为7280mg/L时,添加(NH)42SO46.0g/L,先以黑曲霉(Aspergillusniger)发酵48h,然后接种产朊假丝酵母(Candidautilis)酵母发酵24h,COD的去除率可达81.24%,菌体回收率达1.97g/L,粗蛋白含量达39.76%。
As a result of high moisture content over 90% of water hyacinth Eichhornia crassipes,it is necessary to grind down in place. The juice of water hyacinth could be turned into single cell protein by means of fermentation,which not only eliminate environment contamination but also enhance the utilization rate of resource. According to the study,after 2% spore suspension Aspergillus niger had grown for 40h in the juice of water hyacinth with COD 15,333.33mg/L at 35℃,2% Candida utilis culture was inoculated and ...
出处
《环境科学与技术》
CAS
CSCD
北大核心
2010年第12期35-38,93,共5页
Environmental Science & Technology
基金
广东省科技计划项目(2008B030302010)
关键词
水葫芦
压滤液
双菌发酵
COD去除率
单细胞蛋白
Eichhornia crassipes
juice
mixed fermentation
COD removal rate
single cell protein
