Resource Recovery from Wastewater
Evides Industriewater built a pilot where all aspects of resource recovery were integrated: water reuse, nutrient recovery and energy recovery. The pilot was originally located at a Rotterdam city farm (Uit Je Eigen Stad), but due to its closure later moved to the Delft Blue Innovations site in the Harnaschpolder near Delft. There, reclaimed water from a wastewater plant is used for valuable applications. For instance, energy is extracted from sludge from the electrocoagulation process and useful fertilizers like phosphorus and nitrate as well as other valuable raw materials including cellulose are recovered.
Evides Industriewater建立了一個試點，將資源回收的所有方面都整合在一起:水的再利用、營養回收和能量回收。該試點*初位于鹿特丹城市農場(Uit Je Eigen Stad)，但由于該農場的關閉，后來示范項目搬到了代爾夫特附近的Harnaschpolder的代爾夫特藍色創新基地。在那里，廢水處理廠的再生水被用于有價值的應用。例如，從電凝聚過程中的污泥中提取能量，回收有用的肥料，如磷和硝酸鹽，以及其他有價值的原料，包括纖維素。
4 stages
The project centres around 4 key steps:
Wastewater is stored in a buffer tank, where sedimentation of coarse parts (including moist toilet paper) is accomplished. Experiments are being carried out into the enzymatic conversion of fine sieve screenings to carbon source, which can be used by the denitrifying bacteria in the wastewater treatment plant.
廢水儲存在一個緩沖槽中，在那里完成大顆粒物質(包括濕衛生紙)的沉淀。目前正在進行通過細篩篩分榨取碳源的實驗，該碳源可用于污水處理廠的反硝化。
The wastewater then goes to an electrocoagulation system in which iron or aluminum is brought into solution and will coagulate with the particles, the COD and the phosphate in the wastewater. For the processing of the electrocoagulation sludge, we want to investigate various routes, namely fermentation and pyrolysis.
然后廢水進入電-絮凝系統，這個過程投加鐵或鋁鹽，將與廢水中的顆粒、COD和磷酸鹽發生混凝。對于電絮凝污泥的處理，擬研究多種途徑，即發酵和熱解。
The wastewater treated by electrocoagulation then goes through a pre-filter for protection and then to the nanofiltration pilot system, which consists of two stages (first stage 2 membrane modules, second stage 1 membrane module). New phosphate recovery techniques will be tested on the nanofiltration concentrate, initially on a laboratory scale. The permeate of the nanofiltration pilot system passes through a softener, where calcium and magnesium are removed, prior to the reverse osmosis (RO) membrane. This membrane makes a very clean water product, the RO permeate, that will be delivered to several local initiatives.
電絮凝處理后的廢水經過預過濾，然后進入納濾系統，納濾先導系統由兩個階段組成(**階段2膜模塊，第二階段1膜模塊)。新的磷酸鹽回收技術將在納濾濃縮液上進行試驗，初步進行實驗室規模的試驗。納濾出水通過軟化劑，在進反滲透(RO)膜之前，通過軟化過程除去鈣和鎂。RO膜出水非常純凈，它將被輸送到幾個地方的項目中。
The concentrate of the reverse osmosis is used for an algae culture. Specifically, the demo focuses on a type of algae that produces a valuable blue pigment.
而RO反滲透濃縮液則用于微藻類培養。具體來說，這個示范項目通過微藻能產生寶貴的藍色色素燃料。而傳統RO濃縮液處理成本很高，且很難找到合理可靠的去向。
