【正文】 ，在實驗組和對照沼氣廠的進水 pH值平均為 。 環(huán)境溫度（ ℃ ） 177。 天然氣產(chǎn)量（固體減少每公斤每天） 177。 VS(%) 初始 177。C。年均溫室室溫度記錄是 176。 目前的研究進行了一場大型沼氣廠 。環(huán)境和泥漿溫度記錄每小時的基礎(chǔ)上，使用所有的實驗和每天的平均年齡校準(zhǔn)的熱電偶（由上午七時至下午 6時）。176。沼氣系統(tǒng)的規(guī)模和成本可以降低。 一般情況下，雖沒有法則，但最佳工藝條件穩(wěn)定，應(yīng)仔細調(diào)節(jié)工作溫度。這條件是，取得了抗紫外線的透明塑料蓋，一般被稱為冬季溫室。 除此之外，在現(xiàn)有的設(shè)計和廠房建設(shè)細看可以導(dǎo)致沼氣的優(yōu)化理論。 這一年里控制溫度在 176。C。C ，達到最低 1013176。 在繼續(xù)的研究里，一年時間使用 55天，生產(chǎn)沼氣的目的是用來烹飪和照明。 僅在印度，有估計超過 250萬頭牛和糞的三分之一，如果每年從這些生產(chǎn)可用于生產(chǎn)沼氣，可以安裝超過 12 萬沼氣。在冬季的最佳狀態(tài)，需要一個封閉的環(huán)境中。已發(fā)現(xiàn)減少 3040％的要求相比 的一個標(biāo)準(zhǔn)的 雙層塑料覆蓋溫室加熱。此外，期間所需的沼氣產(chǎn)率，實現(xiàn)最適宜的溫度應(yīng)降低。N）其經(jīng)度和橫向尺寸為 185 公里（東經(jīng)：176。 保留時間保持在 55 天。塑料沼氣廠是相對便宜，從這些材料制作，其性能已經(jīng)發(fā)現(xiàn)，要加強。在實驗的沼氣廠 地面和環(huán)境條件的溫度變化與太陽輻射方面的代表見圖 .1。C 溫室室內(nèi)溫度的熱量轉(zhuǎn)移到水泥砂漿的 176。 最后 177。 177。 177。 據(jù)觀察，記錄在實驗沼氣廠的甲烷氣體分數(shù)為 ％。主要部分產(chǎn)生的沼氣利用，對在本研究中的植物實驗組和對照沼氣做飯照明應(yīng)用。顯而易見的是，記錄在塑料和常規(guī)控制沼氣漿料溫度分別比環(huán)境條件上升為 ％ ， 在實驗的沼氣廠年均溫室室內(nèi)溫度記錄是 ℃ 。Temprature Biogas generation consumes about onefourth of the dung, but the available heat of the gas is about 20% more than that obtained by burning the entire amount of dung directly. This is mainly due to the high efficiency(60%) of utilization pared to the poor efficiency(11%) of burning dung cakes thousand biogas plants have been constructed in developing India alone,there are an estimated over 250 million cattle and if one third of the dung produced annually from these is available for production of biogas,more than 12 million biogas plants can be addition to this,a closer look at the existing designs and plant construction can lead to an optimization theory for biogas plant designs could be optimized for the overall costs rather than merely for the cost of the mildsteel biogas ?oating drum as those were being done earlier. The fabrication of biogas plant is tried with different materials based on which the cost of installation is highly metal digesters are placed underground,where the temperature of the digester progress towards the average temperature of the ground that could maintain higher temperatures but cost,operation and maintenance,corrosion problem and the heat transfer properties makes it conventional cement designs,in addition to digging the formation of cracks and the extended installation time are considered to be major of PVC greenhouse type structure over a biogas plant allowed solar heating of the substrate from18℃ to about 37℃ .Considerable efforts have been devoted in this direction,which resulted in the development of several greenhouse and shallow solar pond over the dome,use of insulation around the digester. The investigations carried out for studying the efficiency of these concepts, however,have limited signi?cance due to inadequate attention to the mechanism of energy gain and condition is achieved in a greenhouse constructed with UVresistant transparent plastic cover,generally known as winter UVstabilized propylene?lm is not resistant to temperatures higher than 沈陽農(nóng)業(yè)大學(xué)學(xué)士學(xué)位論文外文翻譯 7 50℃ ,and it therefore bees brittle and its transparency decreases with the was most probably due to the increasing opacity of the cover and the increasing number of throne areas. The use of solar canopy over the conventional biogas plants was suggested for increasing the slurry temperature and hence the output of has been observed from a parative study of the conventional and the solarassisted greenhouse coupled biogas plant that the temperature of the slurry can be raised from 20℃ to nearly 35℃ ,the optimal temperature foranaerobic new design of greenhouse had been developed for colder regions at Laval University during winter reduction has been found in the heating requirements of 30–40% pared to a standard,double layered plastic covered general,there is no rule of thumb,but for optimum process stability, the temperature should be carefully regulated within a narrow range of the operating a safety measure,it is a mon practice either to burry the digesters in the ground on account of the