沼氣發電機組的核心燃燒原料是沼氣，這種以甲烷為主要成分的可燃氣體，其來源廣泛且與各類有機廢棄物的資源化利用密切相關。深入了解沼氣的來源，不僅能清晰把握沼氣發電機組的燃料供應邏輯，更能體現其在循環經濟中的重要價值。

　　The core combustion material of biogas generator set is biogas, which is a combustible gas mainly composed of methane. Its source is extensive and closely related to the resource utilization of various organic wastes. A deep understanding of the source of biogas not only enables a clear grasp of the fuel supply logic of biogas generators, but also reflects its important value in the circular economy.

　　農業生產領域是沼氣原料的重要來源地。在種植業中，大量的農作物秸稈是生成沼氣的優質原料。小麥、玉米、水稻等作物收獲后，剩余的秸稈含有豐富的纖維素、半纖維素等有機物，這些物質在厭氧環境下能被微生物分解轉化為沼氣。此外，蔬菜種植過程中產生的殘枝敗葉、瓜果藤蔓等農業廢棄物，也可作為沼氣原料，避免了隨意焚燒或堆放造成的環境污染。在養殖業中，畜禽糞便更是理想的沼氣原料。豬、牛、羊等牲畜的糞便富含蛋白質、脂肪等有機物，且產量穩定，一家中等規模的養殖場每天就能產生數噸糞便，這些糞便經過收集處理后，既能為沼氣生產提供持續原料，又能解決糞便堆積帶來的衛生問題和水體污染風險。

　　The agricultural production field is an important source of biogas raw materials. In the agricultural industry, a large amount of crop straw is a high-quality raw material for generating biogas. After harvesting crops such as wheat, corn, and rice, the remaining straw contains abundant organic matter such as cellulose and hemicellulose, which can be decomposed and converted into biogas by microorganisms in anaerobic environments. In addition, agricultural waste such as residual branches, fallen leaves, and fruit vines generated during vegetable cultivation can also be used as biogas raw materials, avoiding environmental pollution caused by indiscriminate burning or stacking. In the breeding industry, livestock manure is an ideal source of biogas. The feces of livestock such as pigs, cows, and sheep are rich in organic matter such as protein and fat, and their production is stable. A medium-sized breeding farm can produce several tons of feces every day. After collection and treatment, these feces can provide continuous raw materials for biogas production and solve the hygiene problems and water pollution risks caused by feces accumulation.

　　工業生產過程中產生的有機廢棄物，也是沼氣原料的重要補充。食品加工行業在生產過程中會產生大量的下腳料，如啤酒釀造后的酒糟、豆制品加工后的豆渣、水果加工后的果皮果核等，這些廢棄物有機物含量高、易降解，非常適合用于沼氣生產。制藥、造紙等行業的部分有機廢水和廢渣，在經過預處理去除有害物質后，也可進入沼氣發酵系統，實現廢物的能源化利用。工業有機廢棄物作為沼氣原料，不僅降低了企業的廢物處理成本，還能通過沼氣發電為企業提供部分能源，形成節能降耗的良性循環。

　　The organic waste generated in the industrial production process is also an important supplement to biogas raw materials. The food processing industry generates a large amount of waste materials during the production process, such as beer lees after brewing, soybean residue after processing soy products, fruit peels and pits after fruit processing, etc. These waste materials have high organic content and are easy to degrade, making them very suitable for biogas production. Part of the organic wastewater and waste residue from industries such as pharmaceuticals and papermaking, after pre-treatment to remove harmful substances, can also enter the biogas fermentation system to achieve energy utilization of waste. Industrial organic waste, as a raw material for biogas, not only reduces the waste treatment cost of enterprises, but also provides some energy for enterprises through biogas power generation, forming a virtuous cycle of energy conservation and consumption reduction.

　　市政生活領域產生的有機垃圾，為沼氣原料提供了穩定來源。城市居民日常生活中產生的廚余垃圾，包括剩菜剩飯、菜葉果皮、過期食品等，含有大量的碳水化合物和有機物，是生成沼氣的優質原料。隨著垃圾分類政策的推進，廚余垃圾被單獨收集后，可集中輸送至沼氣處理廠進行發酵產沼。此外，市政污水處理廠的污泥也是重要的沼氣原料，污泥中含有大量的微生物殘骸和有機碎屑，在厭氧發酵條件下能轉化為沼氣，同時還能實現污泥的減量化和穩定化處理，降低污泥處置的難度和成本。

　　The organic waste generated in the field of municipal life provides a stable source of biogas raw materials. The kitchen waste generated by urban residents in their daily lives, including leftovers, vegetable peels, expired food, etc., contains a large amount of carbohydrates and organic matter, and is a high-quality raw material for generating biogas. With the promotion of garbage classification policies, kitchen waste can be collected separately and transported to biogas treatment plants for fermentation and biogas production. In addition, sludge from municipal sewage treatment plants is also an important raw material for biogas. Sludge contains a large amount of microbial debris and organic debris, which can be converted into biogas under anaerobic fermentation conditions. At the same time, sludge reduction and stabilization treatment can be achieved, reducing the difficulty and cost of sludge disposal.

　　水生植物及水生生物廢棄物同樣可以作為沼氣原料。在河流、湖泊、池塘等水域中，生長的蘆葦、浮萍、水葫蘆等水生植物，生長速度快、生物量大，其體內的有機物含量豐富，可通過收割打撈作為沼氣發酵的原料。同時，水產養殖過程中產生的魚蝦糞便、殘餌以及水生植物的殘體等，也能進入沼氣發酵系統，將水體中的有機物質轉化為清潔能源，形成 “養殖 — 沼氣 — 能源” 的生態循環模式。

　　Aquatic plants and aquatic biological waste can also be used as biogas raw materials. In rivers, lakes, ponds, and other water bodies, aquatic plants such as reeds, duckweed, and water hyacinth grow rapidly and have a large biomass. They are rich in organic matter and can be harvested and salvaged as raw materials for biogas fermentation. At the same time, fish and shrimp feces, residual feed, and aquatic plant residues generated during aquaculture can also enter the biogas fermentation system, converting organic matter in the water into clean energy and forming an ecological cycle model of "aquaculture biogas energy".

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