黑膜沼气池是现在很多养殖场沼气制取装置中的一个重要部分，目前在全国已有很多**工程，该技术是2003年引入中国，得到很多养殖场业主的高度评价，本工艺技术产气量大，花钱少，能有效的降解污水中COD与BOD的浓度，沼气池首**行开挖建池，底部采用防渗膜铺设，防渗膜具有很好的防渗效果，不会污染地下水，**部采用黑膜将沼气池覆盖进行全密封，明显减少气味，保护周围环境。沼气可转化为电能，给猪舍保暖，养殖场照明、做饭等生活用电，做肥料种蔬菜瓜果，沼渣可直接排到鱼塘做饲料。

Black film biogas digesters are an important part of many biogas production facilities in aquaculture farms. There are already many * * projects across the country. This technology was introduced to China in 2003 and has been highly praised by many farm owners. This process technology has a large gas production capacity, low cost, and can effectively degrade the concentration of COD and BOD in sewage. The first row of the biogas digester is excavated and built, and the bottom is covered with anti-seepage film, which has good anti-seepage effect and will not pollute groundwater. The * * part is covered with black film for full sealing, significantly reducing odor and protecting the surrounding environment. Biogas can be converted into electricity to keep pig houses warm, provide lighting and cooking electricity for livestock farms, and be used as fertilizer for growing vegetables and fruits. Biogas residue can be directly discharged into fish ponds as feed.

黑膜沼气池具备建设成本低（每立方设备造价约40-90元），施工方便，建设周期大概30天完工，粪污在密封的沼气池内停留时间长，使粪污中的**物厌氧得较彻底，消化较充分，出来的水基本能达标，池底设有自动排渣装置，池内污泥量少，维护管理方便，可减少人力物力，沼气容积大，产气量高，能进的粪污比常规的沼气池多一二十倍，气柜只能储存200立方米的沼气，而黑膜沼气池则能存储两三千立方米的沼气，还能节省污水处理费和肥料费用等，同时，黑膜沼气池还能很好地解决混凝土沼气工程因温度变化而产生收缩、胀裂引起的渗水、漏水、漏气问题以及地面式钢板沼气工程的钢板易腐蚀、管道易堵塞、设备易损坏、运行费用高等问题。

The black film biogas digester has low construction costs (about 40-90 yuan per cubic meter of equipment), easy construction, and a construction period of about 30 days. The manure stays in the sealed biogas digester for a long time, making the * * substances in the manure more thoroughly anaerobically digested and the water discharged basically meet the standards. The bottom of the digester is equipped with an automatic slag discharge device, which reduces the amount of sludge in the digester, makes maintenance and management convenient, and can reduce manpower and material resources. The biogas volume is large, the gas production is high, and the amount of manure that can enter is about ten to twenty times more than that of conventional biogas digesters. The gas holder can only store 200 cubic meters of biogas, while the black film biogas digester can store two to three thousand cubic meters of biogas, and can also save sewage treatment and fertilizer costs. At the same time, the black film biogas digester The pool can also effectively solve the problems of water seepage and leakage caused by shrinkage and expansion cracks in concrete biogas engineering due to temperature changes The problem of gas leakage and the corrosion of steel plates, blockage of pipelines, damage to equipment, and high operating costs in ground-based steel plate biogas projects.