首先，關注甲烷含量。沼氣的質量會受到氣溫、原料的數量、質量、含水量等的影響而有很大的不同。例如養殖場會定期消毒，含有消毒液的糞污進入發酵池后，會殺滅大量的厭氧菌，就會導致沼氣的甲烷含量大幅度下降。甲烷含量過低的話（一般不低于50%），沼氣發電機組就會出現啟動困難的問題，甚至無法啟動。

Firstly, pay attention to the methane content. The quality of biogas varies greatly depending on factors such as temperature, quantity, quality, and moisture content of the raw materials. For example, farms will regularly disinfect, and the manure containing disinfectant entering the fermentation tank will kill a large number of anaerobic bacteria, leading to a significant decrease in methane content in biogas. If the methane content is too low (generally not less than 50%), the biogas generator set will have difficulty starting, and may even fail to start.

很多人這個時候會認為是機組本是出了問題，然后找廠家派人去維修，花很多冤枉錢。出現機組無法啟動的情況，可以在保證安全的前提現，用打火機嘗試點一下，如果打火機都點不著，或者火苗發黃發紅，說明甲烷含量比較低。解決辦法就是把這一罐氣放掉，等厭氧罐內的厭氧菌濃度恢復，再產的氣甲烷含量就升上來了。其次，要關注就是硫化氫含量。

Many people at this time may think that there was a problem with the unit and then ask the manufacturer to send someone to repair it, wasting a lot of money. If the unit cannot be started, you can try to light it with a lighter on the premise of ensuring safety. If the lighter cannot be lit or the flame turns yellow and red, it indicates that the methane content is relatively low. The solution is to release this tank of gas, and once the concentration of anaerobic bacteria in the tank is restored, the methane content in the produced gas will increase. Secondly, attention should be paid to the hydrogen sulfide content.

有沼氣工程的應該對硫化氫不陌生。這是一種既有腐蝕性，又可燃的有毒成分。硫化氫會對機組的金屬部分造成很大的腐蝕，特別是鐵和銅的部分，硫化氫的腐蝕極大地縮短了機組的使用壽命。硫化氫劇毒物，對粘膜有強烈刺激作用。短期內吸入高濃度的硫化氫后出現流淚、眼痛、眼內異物感、畏光、視覺模糊、流涕、咽喉部灼燒感、咳嗽、胸悶、頭痛、頭暈、乏力、意識模糊等。

Those who have biogas projects should be familiar with hydrogen sulfide. This is a toxic component that is both corrosive and flammable. Hydrogen sulfide can cause significant corrosion to the metal parts of the unit, especially the iron and copper parts. The corrosion of hydrogen sulfide greatly shortens the service life of the unit. Hydrogen sulfide is a highly toxic substance that has a strong irritant effect on mucous membranes. After inhaling high concentrations of hydrogen sulfide in the short term, symptoms such as tearing, eye pain, foreign body sensation, photophobia, blurred vision, runny nose, burning sensation in the throat, cough, chest tightness, headache, dizziness, fatigue, and blurred consciousness may occur.

重者可出現腦水腫、肺水腫，極高濃度（1000Mg/m3以上）時可在數秒內突然昏迷，發生閃電型死亡。高濃度接觸眼結膜發生水腫和角膜潰瘍。長期低濃度接觸，可引起神經衰弱綜合癥和植物神經功能紊亂。所以，沼氣發電機組必須要配備脫硫設備，以降低沼氣中硫化氫的含量，既保證了使用者的安全，又降低了硫化氫對機組的腐蝕作用，從而延長機組使用壽命。

Severe cases may experience cerebral edema and pulmonary edema, and at extremely high concentrations (above 1000mg/m 3), sudden coma may occur within seconds, leading to lightning death. High concentration exposure to the conjunctiva leads to edema and corneal ulcers. Long term exposure to low concentrations can cause neurasthenia syndrome and autonomic nervous system dysfunction. Therefore, biogas generators must be equipped with desulfurization equipment to reduce the content of hydrogen sulfide in biogas, which not only ensures the safety of users but also reduces the corrosive effect of hydrogen sulfide on the unit, thereby extending the service life of the unit.

對發電機定期保養，使用沼氣發電機組跟使用私家車是一個道理，要注意常規的保養，比如定期更換機油，機油濾芯，空氣濾芯，火花塞。這些都是消耗件，運行到一定時間，是需要必須更換的。

Regular maintenance of generators, using biogas generators is the same as using private cars. It is important to pay attention to routine maintenance, such as changing the engine oil, oil filter, air filter, and spark plugs regularly. These are consumables that need to be replaced after running for a certain period of time.

要注意檢查跑冒滴漏現象。線路是否有松動，斷路，短路的情況，電池是否有老化現象；沼氣和水的管路是否有老化，漏水、漏氣等現象。如有發現，及時更換和修理。

Pay attention to checking for leakage and dripping. Is there any looseness, open circuit, or short circuit in the circuit, and is there any aging of the battery; Is there any aging, leakage, or air leakage in the pipelines of biogas and water. If found, replace and repair in a timely manner.

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