亚洲天堂网按摩在线,在线性爱嗯嗯啊,草操好湿无码,亚洲国产成人久久精品app,免费观看两性性爱网,亚洲av无码潮喷在线观看

新聞動(dòng)態(tài)   News
搜索   Search

上海純水設(shè)備解讀:垃圾分來之后的廚余垃圾(濕垃圾)就地處置迎來“春天”目前呈現(xiàn)迸發(fā)的趨勢

2020/7/20 19:51:03      點(diǎn)擊:

上海水處理設(shè)備網(wǎng)shwebi.cn】從國家2019年大力推進(jìn)垃圾分類以來,全國各地紛紛將形成3年的規(guī)劃,將垃圾分類落實(shí)到地。垃圾分類之后,對滲濾液的水質(zhì)勢必有非常大的影響。對填埋場滲濾液,垃圾焚燒發(fā)電廠滲濾液的水量和水質(zhì)都將帶來非常大的影響,相對來說,這兩種滲濾液案例較多,較為幼稚,將會在原來的基礎(chǔ)上進(jìn)行一定的改進(jìn)和運(yùn)行調(diào)整。

而垃圾分類之后的廚余垃圾的滲濾液成為目前更為關(guān)注的熱點(diǎn)。垃圾分來之后的廚余垃圾(濕垃圾)就地處置迎來春天目前呈現(xiàn)迸發(fā)的趨勢。而爆發(fā)的同時(shí),限制該就地處置系統(tǒng)推廣的環(huán)保問題之一,就是滲濾液(污水)處置達(dá)標(biāo)排放。

要考慮如何將廚余垃圾滲濾液(污水)達(dá)標(biāo),先來了解一下廚余垃圾的成分,從廚余垃圾的含水率來分析該滲濾液(污水)水量與水質(zhì),從而針對性的來進(jìn)行設(shè)計(jì)。

2020年717日在廣州官網(wǎng)曬出了2019年廣州市終端生活垃圾組成和性質(zhì)的分析。

根據(jù)分析內(nèi)容,2019年廣州市的生活垃圾物理組成(重量百分比)如下:廚余類(主要為有機(jī)易腐垃圾)55.04%橡塑類23.03%紡織類8.66%紙類6.99%玻璃類2.22%木竹類1.64%混合類0.93%磚瓦陶瓷類0.80%金屬類0.68%其他0.01%其中,混合類指粒徑小于10mm分類比較困難的混合物;其他指廢棄的電池等物質(zhì))生活垃圾主要性質(zhì)如下:容重266kg/m3含水率54.54%濕基低位熱值6869kJ/kg

具體到廚余垃圾,根據(jù)相關(guān)論文分析看出,餐廚(廚余)垃圾組分平均含水率高達(dá)79.5%,干基成分中主要食物垃圾和骨頭貝類為主,另有總油脂高、營養(yǎng)物豐富等特點(diǎn)。餐廚廢棄物中固體廢棄物約占18%廢棄油脂約占3%餐廚廢水約占79%餐廚固體廢棄物主要含有淀粉,粗蛋白和粗脂肪,分別占總質(zhì)量的32%20%29%

根據(jù)論文上海市分類后家庭廚余垃圾理化特性分析對選定的6個(gè)街道進(jìn)行廚余垃圾理化特性全面檢測,由檢測結(jié)果可知,上海廚余垃圾含水率在73%~89%之間,C/N比在14~20之間,脂肪含量在0.7%~2.1%之間,蛋白質(zhì)在1.25%~2.15%之間,含鹽率在0.09%~0.29%之間,重金屬含量均低于《食品中污染物限量》GB2762-2012限值規(guī)范。

中國市政工程華北設(shè)計(jì)研究總院教授級高工,資深滲濾液處置專家杜昱曾在20205月的直播中講到廚余垃圾滲濾液大多執(zhí)行三級規(guī)范,但是對總氮的要求比較嚴(yán),而廚余垃圾垃圾處置廠無法消納濃縮液,因此非膜法在廚余垃圾滲濾液中將更有應(yīng)用前景。

若采用厭氧發(fā)酵處置廚余垃圾的由于厭氧中發(fā)生的氨化作用,沼液中氨氮含量很高(已建項(xiàng)目實(shí)測值高達(dá)4000mg/l針對進(jìn)水總氮高的特點(diǎn)應(yīng)用于該廚余垃圾滲濾液處理中,將是全流程范圍內(nèi)考慮脫氮的問題,而不應(yīng)該依托某一點(diǎn)。

廚余垃圾滲濾液全程脫氮,以及無濃縮液的工藝,將是符合社會需求的工藝技術(shù),也是廚余垃圾滲濾液的難點(diǎn)與重點(diǎn)。                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     

 “本文由上海皙全水處理設(shè)備網(wǎng)提供任何人和單位不得轉(zhuǎn)載盜用”。