Using the conventional chemical analysis technology, the contaminant content in wastewater from different treating stages in two representative large-scale pig farms in Guangxi was determined and they were compared with the national discharged standards. The changes of contamination indices in every treating link were investigated, so as to provide references for taking according measures for energy conservation and emission reduction in the livestock breeding. Contaminants indices included suspended solids (SS), ammonia nitrogen (NH3-N), BOD5 and chemical oxygen demand (CODcr). The results showed that the wastewater discharged from Farm 1 after applying wastewater treatment technology was substandard,but the wastewater discharged from Farm 2 reached standard. Wastewater could be purified by plants grew in the pond. And the suspended solids (SS)could be effectively reduced by the treatment in the settling tank and secondary sedimentation tank.

[Objective] To investigate the effects of reducing concentration of sewage discharge by multiprocessing in a scale pig farm,and provide a theoretical basis for sewage treatment and comprehensive utilization.[Method] Wastewater from a scale pig farm was treated through biogas fermentation,sedimentation and grass irrigation,and the datas of sewage discharge indexes for each process were measured at the same time.[Result] After treatment,Five-day BOD,chemical oxygen demand,suspended solids,NH3-N concentration,Total P were 17.0,41.0,83.0,0.319 and 0.108 mg/L,respectively,fecal coliform number was 130 MPN/100 ml and ascaris egg number was 0 individual/L in the pig farm.[Conclusion] The value of each sewage discharge index is below the maximum permissible quantity of wastewater effluent in Discharge standard of pollutants for livestock and poultry breeding(GB 18596-2001).

<正>本试验从2008年4月至2010年8月,对一个规模猪场和一个规模奶牛场的排污水采取沼气池发酵、沉淀处理和灌溉牧草地等措施进行综合处理,参照《畜禽养殖业污染物排放标准》(GB 18596-2001)分别对各个处理环节进行数据测定,旨在为规模养殖场污水处理和综合利用提供一些有益的探索。

广西地处我国大西南,属乳业欠发达地区。广西壮族自治区政府极为重视这一问题,近年来该地区乳业发展很快。大部分牛奶加工企业的奶源基地、部分养殖小区和个体牛场的原料奶,在加工过程中一般采取高温杀菌的办法来处理牛奶,瓶装奶保质期一般为24h,采取当天生产并于当天进行本地配送的生产销售方法。对广西乳制品生产质量安全问题进行了探索,并提出了一些有针对性的建议。

广西地处中国西南,虽属奶业欠发达地区,但近年来政府的极大重视,促使广西奶业快速发展。广西大部分乳品企业都拥有自己的奶源基地,部分原料奶来自收购养殖小区和个体奶牛养殖场。加工过程中一般采用高温杀菌技术,每天生产并在本地配送,瓶装奶保质期一般为24h。本文针对广西乳制品生产的质量安全现状,从奶牛养殖、原料奶运输、乳品加工、配送4个方面提出了提高广西乳制品质量安全水平的对策。

In paper,the existed problems in Guangxi in livestock husbandry leisure feeding of sewage treatment was discussed for recent years.Based on actual situation of Guangxi area and combining practice,the pattern of the separation of wet and dry--methane ferments--the artificial ley--stable pond-emissionswas put forward,and satisfying effect was achieved.

Experiment was conducted to study sewage treatment and recycling pattern through methane fermenting and sedimentation of wastewater,using sedimentary wastewater to wash stall in a southern Dairy Farm.The results showed that biochemical oxygen demand after 5 days,chemical oxygen demand,NH3-N concentration,fecal coliform number,ascaris egg number were reduced by 64.0%,66.8%,65.9%,54.2%,26.5%,respectively;and the annual water was saved in the farm amounted to 46.6%.

1 前言 2007年广西畜牧业总产值占农业总产值已经超过33%,成为广西经济发展的重要组成部分.但是,随着集约化畜禽养殖场的迅速发展,因畜禽养殖场环境质量恶化而引发的污染、疾病传播、畜禽产品质量下降、危害消费者健康等问题,已经引起社会和政府的广泛关注.

通过对广西区情的分析,认为无公害、绿色和有机畜牧业是广西生态畜牧业当前发展的主要内容.最后,提出了广西生态畜牧业发展的问题与对策.

生态尤其农业生态是全球必须正视的问题,它是农业乃至全社会可持续发展的瓶颈.探讨了生态农业在农业可持续发展中的作用及其与农业推广的关系,并分析指出了今后农业推广为保护生态农业而应采取的策略及其具体的发展方向.

葛[Purearia thunbergiana Benth.(P.hirsuta schneid.)]是豆科(Laguminasae)葛属的多年生能形成块根的草质藤本植物,世界上有20个种,中国占了12个.在我国作为商品的主要是野葛和甘葛,长江以南均有野生和人工种植.当前国内外对葛的研究开发趋向,一是作为药品,葛根的主要有效成分是异黄酮类化合物,其中葛根素是其特有的和主要的有效成分.