Tsarin kula da najasa na jama'ar sake tsugunar da matsugunan Fengtai na birnin Beijing yana kula da kamfanin Henan Datang Shengshi Construction Engineering Co., Ltd. Datang Shengshi yana da kwarewa sosai a fannin kuma ya kware wajen gina tsarin tashar kula da najasa na al'umma.Tsarin kula da najasa yana amfani da mitar iskar oxygen na kamfanin mu, mitar maida hankali kan sludge da mita matakin ultrasonic da sauran kayan aikin don kula da matakin ruwa da ingancin ruwa na tsarin kula da najasa.
