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畜禽糞污資源化利用典型技術模式案例2

2024-06-21 09:25:43 來源：黑龍江省畜牧總站 閱讀量：14453 評論

導讀：黑龍江省畜牧總站依托我省畜禽糞污資源化利用專家委員會，聯(lián)合黑龍江省農業(yè)科學院畜牧獸醫(yī)分院總結提煉出多種適合我省“效果好、運行佳、可復制、可推廣”的典型經(jīng)驗模式。

　　【農機網(wǎng) 科技創(chuàng)新】 按照黑龍江省畜禽養(yǎng)殖廢棄物資源化利用聯(lián)席會議辦公室部署，圍繞“源頭減量、過程控制、末端利用”三個重點環(huán)節(jié)，聚焦畜禽糞污減量化、無害化、資源化，黑龍江省畜牧總站依托我省畜禽糞污資源化利用專家委員會，聯(lián)合黑龍江省農業(yè)科學院畜牧獸醫(yī)分院總結提煉出多種適合我省“效果好、運行佳、可復制、可推廣”的典型經(jīng)驗模式。請各地結合本地區(qū)實際情況學習借鑒，不斷提升畜禽糞污資源化利用水平。今日推出糞污墊料化+肥料化處理模式——中都畜牧有限責任公司典型案例。
 
　　糞污墊料化＋肥料化處理模式
 
　　——中都畜牧有限責任公司典型案例
 
　　由于奶牛糞便中纖維素含量高、質地松軟，可將奶牛場的糞污經(jīng)固液分離后，固體部分經(jīng)好氧發(fā)酵無害化處理后既可以作為牛床墊料進行回用，又可以作為肥料進行還田利用，液體部分經(jīng)貯存厭氧發(fā)酵后在農田需肥和灌溉期間，與灌溉用水按照一定比例混合后，進行水肥一體化施用。
 
　　一、企業(yè)基本情況
 
　　杜爾伯特蒙古族自治縣中都畜牧有限責任公司位于黑龍江省大慶市杜爾伯特蒙古族自治縣一心鄉(xiāng)永勝村，公司為市級重點龍頭企業(yè)、會員單位、A2奶及學生奶認證生產基地。牧場設計規(guī)模5000頭，現(xiàn)存欄4628頭，糞污通過固液分離機分離出來的固態(tài)糞渣，經(jīng)過翻拋設備翻拋晾曬發(fā)酵指標達標后回填牛舍臥床，分離出來的液肥存儲氧化塘，每年2次噴灑還田；后備牛舍糞污經(jīng)過無害化處理后還田為農作物肥料。
 
　　二、技術模式要點
 
　　牧場糞污處理采用“固液分離+發(fā)酵大棚+氧化塘+還田”資源化綜合利用模式。牛舍內采用刮糞板、鏟車進行干清糞，將牛糞清輸糞渠內，渠內有回沖水將糞尿輸送到下端的糞污中轉池內(或鏟車進行干清至牛舍兩端集糞池內，用自卸車拉運到糞污中轉池內)。擠奶廳地面清洗水，擠奶設備以及CIP清洗水通過收集渠收集至擠奶廳外的集水池內，通過回沖泵將上清液提升到待擠廳地面的沖洗閥，用于回沖待擠區(qū)的糞污，集水池池底的糞污混合物通過攪拌輸送泵總到糞污中轉池，然后進行固液分離，將糞渣分離出來，經(jīng)過7～14天(根據(jù)季節(jié)不同，需要的時間不同)的堆積發(fā)酵后，固體物質經(jīng)過翻堆高溫發(fā)酵無害化處理后可做牛床墊料使用。
 
　　固液分離后的廢水泵入氧化塘，生活廢水通過罐車輸運到氧化塘，廢水在氧化塘通過降解和沉淀，存儲6個月以上厭氧、兼氧、好氧反應過程后，達到無害化以后還田利用。
 
圖1-糞污處理工藝流程圖
 
　　三、效益分析
 
　　(一)經(jīng)濟效益
 
　　公司墊料生產設施設備包括固液分離大棚、墊料暫存場、翻拋設備、晾曬場地等，每月生產420噸墊料，牧場糞污處理固液分離出來的糞渣進行無害化發(fā)酵制作有機墊料替換木屑回填臥床，墊料生產成本為174.47元/噸，外購木屑398元/噸，墊料節(jié)約成本為223.53元/噸，計算年產可回填臥床墊料(420噸/月×11月=4620噸)，年度節(jié)約墊料費用103萬元(4260噸×223.53元/噸)。
 
　　(二)社會效益
 
　　公司依法對畜禽養(yǎng)殖糞污進行綜合利用和無害化處理，以綠色生態(tài)為導向，按照政府政策支持、企業(yè)自主運營、產品綠色環(huán)保市場化運作的方針，采取源頭減量、過程控制、末端利用的治理途徑，公司建立有效的畜禽糞污資源化利用機制，因地制宜，因場施策，切實落實符合實際的糞污資源化利用主導模式，以糞渣回填臥床和農田有機肥為主要利用方向，全面推進畜禽養(yǎng)殖糞污資源化利用。
 
　　(三)生態(tài)效益
 
　　通過養(yǎng)殖糞污的墊料化和肥料化利用，降低成本費用、提升盈利能力，實現(xiàn)種養(yǎng)平衡、加快種養(yǎng)結合、帶動上、下游產業(yè)鏈可持續(xù)發(fā)展新格局，以保護生態(tài)環(huán)境為己任，為社會提供優(yōu)質健康、有機綠色的農產品。

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